ucom.c revision 1.108.2.17
1 /* $NetBSD: ucom.c,v 1.108.2.17 2016/06/29 06:38:12 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 1.108.2.17 2016/06/29 06:38:12 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 struct usbd_pipe *sc_ipipe; 162 struct usbd_xfer *sc_ixfer; 163 struct usbd_pipe *sc_opipe; 164 struct usbd_xfer *sc_oxfer; 165 166 void *sc_si; 167 168 const struct ucom_methods *sc_methods; 169 void *sc_parent; 170 int sc_portno; 171 172 struct tty *sc_tty; /* our tty */ 173 u_char sc_lsr; 174 u_char sc_msr; 175 u_char sc_mcr; 176 volatile u_char sc_rx_stopped; 177 u_char sc_rx_unblock; 178 u_char sc_tx_stopped; 179 int sc_swflags; 180 181 u_char sc_opening; /* lock during open */ 182 u_char sc_closing; /* lock during close */ 183 int sc_refcnt; 184 u_char sc_dying; /* disconnecting */ 185 186 struct pps_state sc_pps_state; /* pps state */ 187 188 krndsource_t sc_rndsource; /* random source */ 189 190 kmutex_t sc_lock; 191 kcondvar_t sc_opencv; 192 kcondvar_t sc_detachcv; 193 }; 194 195 dev_type_open(ucomopen); 196 dev_type_close(ucomclose); 197 dev_type_read(ucomread); 198 dev_type_write(ucomwrite); 199 dev_type_ioctl(ucomioctl); 200 dev_type_stop(ucomstop); 201 dev_type_tty(ucomtty); 202 dev_type_poll(ucompoll); 203 204 const struct cdevsw ucom_cdevsw = { 205 .d_open = ucomopen, 206 .d_close = ucomclose, 207 .d_read = ucomread, 208 .d_write = ucomwrite, 209 .d_ioctl = ucomioctl, 210 .d_stop = ucomstop, 211 .d_tty = ucomtty, 212 .d_poll = ucompoll, 213 .d_mmap = nommap, 214 .d_kqfilter = ttykqfilter, 215 .d_discard = nodiscard, 216 .d_flag = D_TTY | D_MPSAFE 217 }; 218 219 static void ucom_cleanup(struct ucom_softc *); 220 static int ucomparam(struct tty *, struct termios *); 221 static int ucomhwiflow(struct tty *, int); 222 static void ucomstart(struct tty *); 223 static void ucom_shutdown(struct ucom_softc *); 224 static int ucom_do_ioctl(struct ucom_softc *, u_long, void *, 225 int, struct lwp *); 226 static void ucom_dtr(struct ucom_softc *, int); 227 static void ucom_rts(struct ucom_softc *, int); 228 static void ucom_break(struct ucom_softc *, int); 229 static void tiocm_to_ucom(struct ucom_softc *, u_long, int); 230 static int ucom_to_tiocm(struct ucom_softc *); 231 232 static void ucom_submit_write(struct ucom_softc *, struct ucom_buffer *); 233 static void ucom_write_status(struct ucom_softc *, struct ucom_buffer *, 234 usbd_status); 235 236 static void ucomwritecb(struct usbd_xfer *, void *, usbd_status); 237 static void ucom_read_complete(struct ucom_softc *); 238 static usbd_status ucomsubmitread(struct ucom_softc *, struct ucom_buffer *); 239 static void ucom_softintr(void *); 240 241 int ucom_match(device_t, cfdata_t, void *); 242 void ucom_attach(device_t, device_t, void *); 243 int ucom_detach(device_t, int); 244 int ucom_activate(device_t, enum devact); 245 extern struct cfdriver ucom_cd; 246 CFATTACH_DECL_NEW(ucom, sizeof(struct ucom_softc), ucom_match, ucom_attach, 247 ucom_detach, ucom_activate); 248 249 int 250 ucom_match(device_t parent, cfdata_t match, void *aux) 251 { 252 return 1; 253 } 254 255 void 256 ucom_attach(device_t parent, device_t self, void *aux) 257 { 258 struct ucom_softc *sc = device_private(self); 259 struct ucom_attach_args *ucaa = aux; 260 struct tty *tp; 261 262 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 263 264 if (ucaa->ucaa_info != NULL) 265 aprint_normal(": %s", ucaa->ucaa_info); 266 aprint_normal("\n"); 267 268 prop_dictionary_set_int32(device_properties(self), "port", 269 ucaa->ucaa_portno); 270 271 //KASSERT(ucaa->ucaa_bulkin != -1 || (ucaa->ucaa_ipipe && ucaa->ucaa_ixfer)); 272 //KASSERT(ucaa->ucaa_bulkout != -1 || (ucaa->ucaa_opipe && ucaa->ucaa_oxfer)); 273 274 sc->sc_dev = self; 275 sc->sc_udev = ucaa->ucaa_device; 276 sc->sc_iface = ucaa->ucaa_iface; 277 sc->sc_bulkout_no = ucaa->ucaa_bulkout; 278 sc->sc_bulkin_no = ucaa->ucaa_bulkin; 279 sc->sc_ibufsize = ucaa->ucaa_ibufsize; 280 sc->sc_ibufsizepad = ucaa->ucaa_ibufsizepad; 281 sc->sc_obufsize = ucaa->ucaa_obufsize; 282 sc->sc_opkthdrlen = ucaa->ucaa_opkthdrlen; 283 sc->sc_methods = ucaa->ucaa_methods; 284 sc->sc_parent = ucaa->ucaa_arg; 285 sc->sc_portno = ucaa->ucaa_portno; 286 287 sc->sc_lsr = 0; 288 sc->sc_msr = 0; 289 sc->sc_mcr = 0; 290 sc->sc_tx_stopped = 0; 291 sc->sc_swflags = 0; 292 sc->sc_opening = 0; 293 sc->sc_closing = 0; 294 sc->sc_refcnt = 0; 295 sc->sc_dying = 0; 296 297 sc->sc_si = softint_establish(SOFTINT_USB, ucom_softintr, sc); 298 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); 299 cv_init(&sc->sc_opencv, "ucomopen"); 300 cv_init(&sc->sc_detachcv, "ucomdtch"); 301 302 SIMPLEQ_INIT(&sc->sc_ibuff_empty); 303 SIMPLEQ_INIT(&sc->sc_ibuff_full); 304 SIMPLEQ_INIT(&sc->sc_obuff_free); 305 SIMPLEQ_INIT(&sc->sc_obuff_full); 306 307 memset(sc->sc_ibuff, 0, sizeof(sc->sc_ibuff)); 308 memset(sc->sc_obuff, 0, sizeof(sc->sc_obuff)); 309 310 DPRINTF("open pipes in=%d out=%d", sc->sc_bulkin_no, sc->sc_bulkout_no, 311 0, 0); 312 313 struct ucom_buffer *ub; 314 usbd_status err; 315 int error; 316 317 if (sc->sc_bulkin_no != -1) { 318 /* Open the bulk pipes */ 319 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 320 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 321 if (err) { 322 DPRINTF("open bulk in error (addr %d), err=%d", 323 sc->sc_bulkin_no, err, 0, 0); 324 error = EIO; 325 goto fail_0; 326 } 327 /* Allocate input buffers */ 328 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 329 ub++) { 330 error = usbd_create_xfer(sc->sc_bulkin_pipe, 331 sc->sc_ibufsizepad, USBD_SHORT_XFER_OK, 0, 332 &ub->ub_xfer); 333 if (error) 334 goto fail_1; 335 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 336 } 337 338 } 339 340 if (sc->sc_bulkout_no != -1) { 341 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, 342 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 343 if (err) { 344 DPRINTF("open bulk out error (addr %d), err=%d", 345 sc->sc_bulkout_no, err, 0, 0); 346 error = EIO; 347 goto fail_1; 348 } 349 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 350 ub++) { 351 error = usbd_create_xfer(sc->sc_bulkout_pipe, 352 sc->sc_obufsize, 0, 0, &ub->ub_xfer); 353 if (error) 354 goto fail_2; 355 ub->ub_data = usbd_get_buffer(ub->ub_xfer); 356 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 357 } 358 } 359 360 if (sc->sc_ipipe && sc->sc_ixfer) { 361 ub = &sc->sc_ibuff[0]; 362 ub->ub_data = usbd_get_buffer(sc->sc_ixfer); 363 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 364 } 365 if (sc->sc_opipe && sc->sc_oxfer) { 366 ub = &sc->sc_obuff[0]; 367 ub->ub_data = usbd_get_buffer(sc->sc_oxfer); 368 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 369 } 370 371 tp = tty_alloc(); 372 tp->t_oproc = ucomstart; 373 tp->t_param = ucomparam; 374 tp->t_hwiflow = ucomhwiflow; 375 sc->sc_tty = tp; 376 377 DPRINTF("tty_attach %p", tp, 0, 0, 0); 378 tty_attach(tp); 379 380 rnd_attach_source(&sc->sc_rndsource, device_xname(sc->sc_dev), 381 RND_TYPE_TTY, RND_FLAG_DEFAULT); 382 383 if (!pmf_device_register(self, NULL, NULL)) 384 aprint_error_dev(self, "couldn't establish power handler\n"); 385 return; 386 387 fail_2: 388 for (ub = &sc->sc_obuff[0]; ub != &sc->sc_obuff[UCOM_OUT_BUFFS]; 389 ub++) { 390 if (ub->ub_xfer) 391 usbd_destroy_xfer(ub->ub_xfer); 392 } 393 394 usbd_close_pipe(sc->sc_bulkout_pipe); 395 396 fail_1: 397 for (ub = &sc->sc_ibuff[0]; ub != &sc->sc_ibuff[UCOM_IN_BUFFS]; 398 ub++) { 399 if (ub->ub_xfer) 400 usbd_destroy_xfer(ub->ub_xfer); 401 } 402 usbd_close_pipe(sc->sc_bulkin_pipe); 403 404 fail_0: 405 aprint_error_dev(self, "attach failed, error=%d\n", error); 406 407 return; 408 } 409 410 int 411 ucom_detach(device_t self, int flags) 412 { 413 struct ucom_softc *sc = device_private(self); 414 struct tty *tp = sc->sc_tty; 415 int maj, mn; 416 int i; 417 418 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 419 420 DPRINTF("sc=%p flags=%d tp=%p", sc, flags, tp, 0); 421 DPRINTF("... pipe=%d,%d",sc->sc_bulkin_no, sc->sc_bulkout_no, 0, 0); 422 423 mutex_enter(&sc->sc_lock); 424 sc->sc_dying = 1; 425 mutex_exit(&sc->sc_lock); 426 427 pmf_device_deregister(self); 428 429 if (sc->sc_bulkin_pipe != NULL) 430 usbd_abort_pipe(sc->sc_bulkin_pipe); 431 if (sc->sc_bulkout_pipe != NULL) 432 usbd_abort_pipe(sc->sc_bulkout_pipe); 433 434 mutex_enter(&sc->sc_lock); 435 while (sc->sc_refcnt > 0) { 436 /* Wake up anyone waiting */ 437 if (tp != NULL) { 438 mutex_spin_enter(&tty_lock); 439 CLR(tp->t_state, TS_CARR_ON); 440 CLR(tp->t_cflag, CLOCAL | MDMBUF); 441 ttyflush(tp, FREAD|FWRITE); 442 mutex_spin_exit(&tty_lock); 443 } 444 /* Wait for processes to go away. */ 445 usb_detach_wait(sc->sc_dev, &sc->sc_detachcv, &sc->sc_lock); 446 } 447 448 softint_disestablish(sc->sc_si); 449 mutex_exit(&sc->sc_lock); 450 451 /* locate the major number */ 452 maj = cdevsw_lookup_major(&ucom_cdevsw); 453 454 /* Nuke the vnodes for any open instances. */ 455 mn = device_unit(self); 456 DPRINTF("maj=%d mn=%d\n", maj, mn, 0, 0); 457 vdevgone(maj, mn, mn, VCHR); 458 vdevgone(maj, mn | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); 459 vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); 460 461 /* Detach and free the tty. */ 462 if (tp != NULL) { 463 tty_detach(tp); 464 tty_free(tp); 465 sc->sc_tty = NULL; 466 } 467 468 for (i = 0; i < UCOM_IN_BUFFS; i++) { 469 if (sc->sc_ibuff[i].ub_xfer != NULL) 470 usbd_destroy_xfer(sc->sc_ibuff[i].ub_xfer); 471 } 472 473 for (i = 0; i < UCOM_OUT_BUFFS; i++) { 474 if (sc->sc_obuff[i].ub_xfer != NULL) 475 usbd_destroy_xfer(sc->sc_obuff[i].ub_xfer); 476 } 477 478 if (sc->sc_bulkin_pipe != NULL) { 479 usbd_close_pipe(sc->sc_bulkin_pipe); 480 sc->sc_bulkin_pipe = NULL; 481 } 482 483 if (sc->sc_bulkout_pipe != NULL) { 484 usbd_close_pipe(sc->sc_bulkout_pipe); 485 sc->sc_bulkout_pipe = NULL; 486 } 487 488 /* Detach the random source */ 489 rnd_detach_source(&sc->sc_rndsource); 490 491 mutex_destroy(&sc->sc_lock); 492 cv_destroy(&sc->sc_opencv); 493 cv_destroy(&sc->sc_detachcv); 494 495 return 0; 496 } 497 498 int 499 ucom_activate(device_t self, enum devact act) 500 { 501 struct ucom_softc *sc = device_private(self); 502 503 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 504 505 DPRINTFN(5, "%d", act, 0, 0, 0); 506 507 switch (act) { 508 case DVACT_DEACTIVATE: 509 mutex_enter(&sc->sc_lock); 510 sc->sc_dying = 1; 511 mutex_exit(&sc->sc_lock); 512 return 0; 513 default: 514 return EOPNOTSUPP; 515 } 516 } 517 518 void 519 ucom_shutdown(struct ucom_softc *sc) 520 { 521 struct tty *tp = sc->sc_tty; 522 523 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 524 525 KASSERT(mutex_owned(&sc->sc_lock)); 526 /* 527 * Hang up if necessary. Wait a bit, so the other side has time to 528 * notice even if we immediately open the port again. 529 */ 530 if (ISSET(tp->t_cflag, HUPCL)) { 531 ucom_dtr(sc, 0); 532 /* XXX will only timeout */ 533 (void) kpause(ttclos, false, hz, &sc->sc_lock); 534 } 535 } 536 537 int 538 ucomopen(dev_t dev, int flag, int mode, struct lwp *l) 539 { 540 int unit = UCOMUNIT(dev); 541 struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit); 542 struct ucom_buffer *ub; 543 struct tty *tp; 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 tp = sc->sc_tty; 563 564 DPRINTF("unit=%d, tp=%p\n", 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 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 705 struct tty *tp; 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 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 usb_detach_broadcast(sc->sc_dev, &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 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 758 struct tty *tp; 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 tp = sc->sc_tty; 773 774 sc->sc_refcnt++; 775 mutex_exit(&sc->sc_lock); 776 error = ((*tp->t_linesw->l_read)(tp, uio, flag)); 777 mutex_enter(&sc->sc_lock); 778 779 if (--sc->sc_refcnt < 0) 780 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 781 mutex_exit(&sc->sc_lock); 782 783 return error; 784 } 785 786 int 787 ucomwrite(dev_t dev, struct uio *uio, int flag) 788 { 789 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 790 struct tty *tp; 791 int error; 792 793 if (sc == NULL) 794 return EIO; 795 796 mutex_enter(&sc->sc_lock); 797 if (sc->sc_dying) { 798 mutex_exit(&sc->sc_lock); 799 return EIO; 800 } 801 802 tp = sc->sc_tty; 803 804 sc->sc_refcnt++; 805 mutex_exit(&sc->sc_lock); 806 error = ((*tp->t_linesw->l_write)(tp, uio, flag)); 807 mutex_enter(&sc->sc_lock); 808 if (--sc->sc_refcnt < 0) 809 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 810 mutex_exit(&sc->sc_lock); 811 812 return error; 813 } 814 815 int 816 ucompoll(dev_t dev, int events, struct lwp *l) 817 { 818 struct ucom_softc *sc; 819 struct tty *tp; 820 int revents; 821 822 sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 823 if (sc == NULL) 824 return POLLHUP; 825 826 mutex_enter(&sc->sc_lock); 827 if (sc->sc_dying) { 828 mutex_exit(&sc->sc_lock); 829 return POLLHUP; 830 } 831 tp = sc->sc_tty; 832 833 sc->sc_refcnt++; 834 mutex_exit(&sc->sc_lock); 835 revents = ((*tp->t_linesw->l_poll)(tp, events, l)); 836 mutex_enter(&sc->sc_lock); 837 if (--sc->sc_refcnt < 0) 838 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 839 mutex_exit(&sc->sc_lock); 840 841 return revents; 842 } 843 844 struct tty * 845 ucomtty(dev_t dev) 846 { 847 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 848 849 return sc != NULL ? sc->sc_tty : NULL; 850 } 851 852 int 853 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 854 { 855 struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev)); 856 int error; 857 858 if (sc == NULL) 859 return EIO; 860 861 mutex_enter(&sc->sc_lock); 862 if (sc->sc_dying) { 863 mutex_exit(&sc->sc_lock); 864 return EIO; 865 } 866 867 sc->sc_refcnt++; 868 error = ucom_do_ioctl(sc, cmd, data, flag, l); 869 if (--sc->sc_refcnt < 0) 870 usb_detach_broadcast(sc->sc_dev, &sc->sc_detachcv); 871 mutex_exit(&sc->sc_lock); 872 return error; 873 } 874 875 static int 876 ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, void *data, 877 int flag, struct lwp *l) 878 { 879 struct tty *tp = sc->sc_tty; 880 int error; 881 882 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 883 884 DPRINTF("cmd=0x%08lx", cmd, 0, 0, 0); 885 886 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 887 if (error != EPASSTHROUGH) 888 return error; 889 890 error = ttioctl(tp, cmd, data, flag, l); 891 if (error != EPASSTHROUGH) 892 return error; 893 894 if (sc->sc_methods->ucom_ioctl != NULL) { 895 error = sc->sc_methods->ucom_ioctl(sc->sc_parent, 896 sc->sc_portno, cmd, data, flag, l->l_proc); 897 if (error != EPASSTHROUGH) 898 return error; 899 } 900 901 error = 0; 902 903 DPRINTF("our cmd=0x%08lx", cmd, 0, 0, 0); 904 //mutex_enter(&tty_lock); 905 906 switch (cmd) { 907 case TIOCSBRK: 908 ucom_break(sc, 1); 909 break; 910 911 case TIOCCBRK: 912 ucom_break(sc, 0); 913 break; 914 915 case TIOCSDTR: 916 ucom_dtr(sc, 1); 917 break; 918 919 case TIOCCDTR: 920 ucom_dtr(sc, 0); 921 break; 922 923 case TIOCGFLAGS: 924 *(int *)data = sc->sc_swflags; 925 break; 926 927 case TIOCSFLAGS: 928 error = kauth_authorize_device_tty(l->l_cred, 929 KAUTH_DEVICE_TTY_PRIVSET, tp); 930 if (error) 931 break; 932 sc->sc_swflags = *(int *)data; 933 break; 934 935 case TIOCMSET: 936 case TIOCMBIS: 937 case TIOCMBIC: 938 tiocm_to_ucom(sc, cmd, *(int *)data); 939 break; 940 941 case TIOCMGET: 942 *(int *)data = ucom_to_tiocm(sc); 943 break; 944 945 case PPS_IOC_CREATE: 946 case PPS_IOC_DESTROY: 947 case PPS_IOC_GETPARAMS: 948 case PPS_IOC_SETPARAMS: 949 case PPS_IOC_GETCAP: 950 case PPS_IOC_FETCH: 951 #ifdef PPS_SYNC 952 case PPS_IOC_KCBIND: 953 #endif 954 mutex_spin_enter(&timecounter_lock); 955 error = pps_ioctl(cmd, data, &sc->sc_pps_state); 956 mutex_spin_exit(&timecounter_lock); 957 break; 958 959 default: 960 error = EPASSTHROUGH; 961 break; 962 } 963 964 //mutex_exit(&tty_lock); 965 966 return error; 967 } 968 969 static void 970 tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits) 971 { 972 u_char combits; 973 974 combits = 0; 975 if (ISSET(ttybits, TIOCM_DTR)) 976 SET(combits, UMCR_DTR); 977 if (ISSET(ttybits, TIOCM_RTS)) 978 SET(combits, UMCR_RTS); 979 980 switch (how) { 981 case TIOCMBIC: 982 CLR(sc->sc_mcr, combits); 983 break; 984 985 case TIOCMBIS: 986 SET(sc->sc_mcr, combits); 987 break; 988 989 case TIOCMSET: 990 CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); 991 SET(sc->sc_mcr, combits); 992 break; 993 } 994 995 if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) 996 ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); 997 if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) 998 ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); 999 } 1000 1001 static int 1002 ucom_to_tiocm(struct ucom_softc *sc) 1003 { 1004 u_char combits; 1005 int ttybits = 0; 1006 1007 combits = sc->sc_mcr; 1008 if (ISSET(combits, UMCR_DTR)) 1009 SET(ttybits, TIOCM_DTR); 1010 if (ISSET(combits, UMCR_RTS)) 1011 SET(ttybits, TIOCM_RTS); 1012 1013 combits = sc->sc_msr; 1014 if (ISSET(combits, UMSR_DCD)) 1015 SET(ttybits, TIOCM_CD); 1016 if (ISSET(combits, UMSR_CTS)) 1017 SET(ttybits, TIOCM_CTS); 1018 if (ISSET(combits, UMSR_DSR)) 1019 SET(ttybits, TIOCM_DSR); 1020 if (ISSET(combits, UMSR_RI | UMSR_TERI)) 1021 SET(ttybits, TIOCM_RI); 1022 1023 #if 0 1024 XXX; 1025 if (sc->sc_ier != 0) 1026 SET(ttybits, TIOCM_LE); 1027 #endif 1028 1029 return ttybits; 1030 } 1031 1032 static void 1033 ucom_break(struct ucom_softc *sc, int onoff) 1034 { 1035 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1036 1037 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1038 1039 if (sc->sc_methods->ucom_set != NULL) 1040 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1041 UCOM_SET_BREAK, onoff); 1042 } 1043 1044 static void 1045 ucom_dtr(struct ucom_softc *sc, int onoff) 1046 { 1047 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1048 1049 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1050 1051 if (sc->sc_methods->ucom_set != NULL) 1052 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1053 UCOM_SET_DTR, onoff); 1054 } 1055 1056 static void 1057 ucom_rts(struct ucom_softc *sc, int onoff) 1058 { 1059 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1060 1061 DPRINTF("onoff=%d", onoff, 0, 0, 0); 1062 1063 if (sc->sc_methods->ucom_set != NULL) 1064 sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, 1065 UCOM_SET_RTS, onoff); 1066 } 1067 1068 void 1069 ucom_status_change(struct ucom_softc *sc) 1070 { 1071 struct tty *tp = sc->sc_tty; 1072 u_char old_msr; 1073 1074 if (sc->sc_methods->ucom_get_status != NULL) { 1075 old_msr = sc->sc_msr; 1076 sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, 1077 &sc->sc_lsr, &sc->sc_msr); 1078 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) { 1079 mutex_spin_enter(&timecounter_lock); 1080 pps_capture(&sc->sc_pps_state); 1081 pps_event(&sc->sc_pps_state, 1082 (sc->sc_msr & UMSR_DCD) ? 1083 PPS_CAPTUREASSERT : 1084 PPS_CAPTURECLEAR); 1085 mutex_spin_exit(&timecounter_lock); 1086 1087 (*tp->t_linesw->l_modem)(tp, 1088 ISSET(sc->sc_msr, UMSR_DCD)); 1089 } 1090 } else { 1091 sc->sc_lsr = 0; 1092 /* Assume DCD is present, if we have no chance to check it. */ 1093 sc->sc_msr = UMSR_DCD; 1094 } 1095 } 1096 1097 static int 1098 ucomparam(struct tty *tp, struct termios *t) 1099 { 1100 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1101 UCOMUNIT(tp->t_dev)); 1102 int error; 1103 1104 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1105 1106 if (sc == NULL || sc->sc_dying) 1107 return EIO; 1108 1109 /* Check requested parameters. */ 1110 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1111 return EINVAL; 1112 1113 /* 1114 * For the console, always force CLOCAL and !HUPCL, so that the port 1115 * is always active. 1116 */ 1117 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { 1118 SET(t->c_cflag, CLOCAL); 1119 CLR(t->c_cflag, HUPCL); 1120 } 1121 1122 /* 1123 * If there were no changes, don't do anything. This avoids dropping 1124 * input and improves performance when all we did was frob things like 1125 * VMIN and VTIME. 1126 */ 1127 if (tp->t_ospeed == t->c_ospeed && 1128 tp->t_cflag == t->c_cflag) 1129 return 0; 1130 1131 /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */ 1132 1133 /* And copy to tty. */ 1134 tp->t_ispeed = 0; 1135 tp->t_ospeed = t->c_ospeed; 1136 tp->t_cflag = t->c_cflag; 1137 1138 if (sc->sc_methods->ucom_param != NULL) { 1139 error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, 1140 t); 1141 if (error) 1142 return error; 1143 } 1144 1145 /* XXX worry about CHWFLOW */ 1146 1147 /* 1148 * Update the tty layer's idea of the carrier bit, in case we changed 1149 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1150 * explicit request. 1151 */ 1152 DPRINTF("l_modem", 0, 0, 0, 0); 1153 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, UMSR_DCD)); 1154 1155 #if 0 1156 XXX what if the hardware is not open 1157 if (!ISSET(t->c_cflag, CHWFLOW)) { 1158 if (sc->sc_tx_stopped) { 1159 sc->sc_tx_stopped = 0; 1160 ucomstart(tp); 1161 } 1162 } 1163 #endif 1164 1165 return 0; 1166 } 1167 1168 static int 1169 ucomhwiflow(struct tty *tp, int block) 1170 { 1171 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1172 UCOMUNIT(tp->t_dev)); 1173 int old; 1174 1175 if (sc == NULL) 1176 return 0; 1177 1178 mutex_enter(&sc->sc_lock); 1179 old = sc->sc_rx_stopped; 1180 sc->sc_rx_stopped = (u_char)block; 1181 1182 if (old && !block) { 1183 sc->sc_rx_unblock = 1; 1184 softint_schedule(sc->sc_si); 1185 } 1186 mutex_exit(&sc->sc_lock); 1187 1188 return 1; 1189 } 1190 1191 static void 1192 ucomstart(struct tty *tp) 1193 { 1194 struct ucom_softc *sc = device_lookup_private(&ucom_cd, 1195 UCOMUNIT(tp->t_dev)); 1196 struct ucom_buffer *ub; 1197 u_char *data; 1198 int cnt; 1199 1200 if (sc == NULL) 1201 return; 1202 1203 KASSERT(&sc->sc_lock); 1204 KASSERT(mutex_owned(&tty_lock)); 1205 if (sc->sc_dying) { 1206 return; 1207 } 1208 1209 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1210 goto out; 1211 if (sc->sc_tx_stopped) 1212 goto out; 1213 1214 if (!ttypull(tp)) 1215 goto out; 1216 1217 /* Grab the first contiguous region of buffer space. */ 1218 data = tp->t_outq.c_cf; 1219 cnt = ndqb(&tp->t_outq, 0); 1220 1221 if (cnt == 0) 1222 goto out; 1223 1224 ub = SIMPLEQ_FIRST(&sc->sc_obuff_free); 1225 if (ub == NULL) { 1226 SET(tp->t_state, TS_BUSY); 1227 goto out; 1228 } 1229 1230 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_free, ub_link); 1231 1232 if (SIMPLEQ_FIRST(&sc->sc_obuff_free) == NULL) 1233 SET(tp->t_state, TS_BUSY); 1234 1235 if (cnt > sc->sc_obufsize) 1236 cnt = sc->sc_obufsize; 1237 1238 if (sc->sc_methods->ucom_write != NULL) 1239 sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, 1240 ub->ub_data, data, &cnt); 1241 else 1242 memcpy(ub->ub_data, data, cnt); 1243 1244 ub->ub_len = cnt; 1245 ub->ub_index = 0; 1246 1247 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_full, ub, ub_link); 1248 1249 softint_schedule(sc->sc_si); 1250 1251 out: 1252 return; 1253 } 1254 1255 void 1256 ucomstop(struct tty *tp, int flag) 1257 { 1258 #if 0 1259 struct ucom_softc *sc = 1260 device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev)); 1261 1262 mutex_enter(&sc->sc_lock); 1263 mutex_spin_enter(&tty_lock); 1264 if (ISSET(tp->t_state, TS_BUSY)) { 1265 /* obuff_full -> obuff_free? */ 1266 /* sc->sc_tx_stopped = 1; */ 1267 if (!ISSET(tp->t_state, TS_TTSTOP)) 1268 SET(tp->t_state, TS_FLUSH); 1269 } 1270 mutex_spin_exit(&tty_lock); 1271 mutex_exit(&sc->sc_lock); 1272 #endif 1273 } 1274 1275 static void 1276 ucom_write_status(struct ucom_softc *sc, struct ucom_buffer *ub, 1277 usbd_status err) 1278 { 1279 struct tty *tp = sc->sc_tty; 1280 uint32_t cc = ub->ub_len; 1281 1282 KASSERT(mutex_owned(&sc->sc_lock)); 1283 1284 switch (err) { 1285 case USBD_IN_PROGRESS: 1286 ub->ub_index = ub->ub_len; 1287 break; 1288 case USBD_STALLED: 1289 ub->ub_index = 0; 1290 softint_schedule(sc->sc_si); 1291 break; 1292 case USBD_NORMAL_COMPLETION: 1293 usbd_get_xfer_status(ub->ub_xfer, NULL, NULL, &cc, NULL); 1294 rnd_add_uint32(&sc->sc_rndsource, cc); 1295 /*FALLTHROUGH*/ 1296 default: 1297 SIMPLEQ_REMOVE_HEAD(&sc->sc_obuff_full, ub_link); 1298 SIMPLEQ_INSERT_TAIL(&sc->sc_obuff_free, ub, ub_link); 1299 cc -= sc->sc_opkthdrlen; 1300 1301 mutex_spin_enter(&tty_lock); 1302 CLR(tp->t_state, TS_BUSY); 1303 if (ISSET(tp->t_state, TS_FLUSH)) 1304 CLR(tp->t_state, TS_FLUSH); 1305 else 1306 ndflush(&tp->t_outq, cc); 1307 mutex_spin_exit(&tty_lock); 1308 1309 if (err != USBD_CANCELLED && err != USBD_IOERROR && 1310 !sc->sc_dying) { 1311 if ((ub = SIMPLEQ_FIRST(&sc->sc_obuff_full)) != NULL) 1312 ucom_submit_write(sc, ub); 1313 1314 mutex_spin_enter(&tty_lock); 1315 (*tp->t_linesw->l_start)(tp); 1316 mutex_spin_exit(&tty_lock); 1317 } 1318 break; 1319 } 1320 } 1321 1322 static void 1323 ucom_submit_write(struct ucom_softc *sc, struct ucom_buffer *ub) 1324 { 1325 1326 KASSERT(mutex_owned(&sc->sc_lock)); 1327 1328 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, ub->ub_len, 1329 0, USBD_NO_TIMEOUT, ucomwritecb); 1330 1331 ucom_write_status(sc, ub, usbd_transfer(ub->ub_xfer)); 1332 } 1333 1334 static void 1335 ucomwritecb(struct usbd_xfer *xfer, void *p, usbd_status status) 1336 { 1337 struct ucom_softc *sc = (struct ucom_softc *)p; 1338 1339 mutex_enter(&sc->sc_lock); 1340 ucom_write_status(sc, SIMPLEQ_FIRST(&sc->sc_obuff_full), status); 1341 mutex_exit(&sc->sc_lock); 1342 1343 } 1344 1345 static void 1346 ucom_softintr(void *arg) 1347 { 1348 struct ucom_softc *sc = arg; 1349 struct tty *tp = sc->sc_tty; 1350 struct ucom_buffer *ub; 1351 1352 mutex_enter(&sc->sc_lock); 1353 mutex_enter(&tty_lock); 1354 if (!ISSET(tp->t_state, TS_ISOPEN)) { 1355 mutex_exit(&tty_lock); 1356 mutex_exit(&sc->sc_lock); 1357 return; 1358 } 1359 mutex_exit(&tty_lock); 1360 1361 ub = SIMPLEQ_FIRST(&sc->sc_obuff_full); 1362 1363 if (ub != NULL && ub->ub_index == 0) 1364 ucom_submit_write(sc, ub); 1365 1366 if (sc->sc_rx_unblock) 1367 ucom_read_complete(sc); 1368 1369 mutex_exit(&sc->sc_lock); 1370 } 1371 1372 static void 1373 ucom_read_complete(struct ucom_softc *sc) 1374 { 1375 int (*rint)(int, struct tty *); 1376 struct ucom_buffer *ub; 1377 struct tty *tp; 1378 1379 KASSERT(mutex_owned(&sc->sc_lock)); 1380 1381 tp = sc->sc_tty; 1382 rint = tp->t_linesw->l_rint; 1383 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1384 1385 while (ub != NULL && !sc->sc_rx_stopped) { 1386 1387 /* XXX ttyinput takes tty_lock */ 1388 while (ub->ub_index < ub->ub_len && !sc->sc_rx_stopped) { 1389 /* Give characters to tty layer. */ 1390 if ((*rint)(ub->ub_data[ub->ub_index], tp) == -1) { 1391 /* Overflow: drop remainder */ 1392 ub->ub_index = ub->ub_len; 1393 } else 1394 ub->ub_index++; 1395 } 1396 1397 if (ub->ub_index == ub->ub_len) { 1398 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_full, ub_link); 1399 1400 ucomsubmitread(sc, ub); 1401 1402 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_full); 1403 } 1404 } 1405 1406 sc->sc_rx_unblock = (ub != NULL); 1407 } 1408 1409 static usbd_status 1410 ucomsubmitread(struct ucom_softc *sc, struct ucom_buffer *ub) 1411 { 1412 usbd_status err; 1413 1414 if (sc->sc_bulkin_no != -1) { 1415 usbd_setup_xfer(ub->ub_xfer, sc, ub->ub_data, sc->sc_ibufsize, 1416 USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ucomreadcb); 1417 1418 if ((err = usbd_transfer(ub->ub_xfer)) != USBD_IN_PROGRESS) { 1419 /* XXX: Recover from this, please! */ 1420 printf("%s: err=%s\n", __func__, usbd_errstr(err)); 1421 return err; 1422 } 1423 } 1424 1425 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_empty, ub, ub_link); 1426 1427 return USBD_NORMAL_COMPLETION; 1428 } 1429 1430 void 1431 ucomreadcb(struct usbd_xfer *xfer, void *p, usbd_status status) 1432 { 1433 struct ucom_softc *sc = (struct ucom_softc *)p; 1434 struct tty *tp = sc->sc_tty; 1435 struct ucom_buffer *ub; 1436 uint32_t cc; 1437 u_char *cp; 1438 1439 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1440 1441 if (status == USBD_CANCELLED) 1442 return; 1443 1444 mutex_enter(&sc->sc_lock); 1445 if (status == USBD_IOERROR || 1446 sc->sc_dying) { 1447 DPRINTF("dying", 0, 0, 0, 0); 1448 /* Send something to wake upper layer */ 1449 (tp->t_linesw->l_rint)('\n', tp); 1450 mutex_spin_enter(&tty_lock); /* XXX */ 1451 ttwakeup(tp); 1452 mutex_spin_exit(&tty_lock); /* XXX */ 1453 mutex_exit(&sc->sc_lock); 1454 return; 1455 } 1456 1457 ub = SIMPLEQ_FIRST(&sc->sc_ibuff_empty); 1458 SIMPLEQ_REMOVE_HEAD(&sc->sc_ibuff_empty, ub_link); 1459 1460 if (status == USBD_STALLED) { 1461 if (sc->sc_bulkin_no != -1) 1462 usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); 1463 if (sc->sc_ipipe) 1464 usbd_clear_endpoint_stall_async(sc->sc_ipipe); 1465 ucomsubmitread(sc, ub); 1466 mutex_exit(&sc->sc_lock); 1467 return; 1468 } 1469 1470 if (status != USBD_NORMAL_COMPLETION) { 1471 printf("ucomreadcb: wonky status=%s\n", usbd_errstr(status)); 1472 mutex_exit(&sc->sc_lock); 1473 return; 1474 } 1475 1476 usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL); 1477 1478 #ifdef UCOM_DEBUG 1479 /* This is triggered by uslsa(4) occasionally. */ 1480 if ((ucomdebug > 0) && (cc == 0)) { 1481 device_printf(sc->sc_dev, "ucomreadcb: zero length xfer!\n"); 1482 } 1483 #endif 1484 1485 KDASSERT(cp == ub->ub_data); 1486 1487 rnd_add_uint32(&sc->sc_rndsource, cc); 1488 1489 if (sc->sc_opening) { 1490 ucomsubmitread(sc, ub); 1491 mutex_exit(&sc->sc_lock); 1492 return; 1493 } 1494 1495 ub->ub_data = usbd_get_buffer(xfer); 1496 if (sc->sc_methods->ucom_read != NULL) { 1497 sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, 1498 &cp, &cc); 1499 ub->ub_index = (u_int)(cp - ub->ub_data); 1500 } else 1501 ub->ub_index = 0; 1502 1503 ub->ub_len = cc; 1504 1505 SIMPLEQ_INSERT_TAIL(&sc->sc_ibuff_full, ub, ub_link); 1506 1507 ucom_read_complete(sc); 1508 mutex_exit(&sc->sc_lock); 1509 } 1510 1511 static void 1512 ucom_cleanup(struct ucom_softc *sc) 1513 { 1514 1515 UCOMHIST_FUNC(); UCOMHIST_CALLED(); 1516 1517 DPRINTF("aborting pipes", 0, 0, 0, 0); 1518 1519 KASSERT(mutex_owned(&sc->sc_lock)); 1520 1521 ucom_shutdown(sc); 1522 if (sc->sc_bulkin_pipe != NULL) { 1523 usbd_abort_pipe(sc->sc_bulkin_pipe); 1524 } 1525 if (sc->sc_bulkout_pipe != NULL) { 1526 usbd_abort_pipe(sc->sc_bulkout_pipe); 1527 } 1528 } 1529 1530 #endif /* NUCOM > 0 */ 1531 1532 int 1533 ucomprint(void *aux, const char *pnp) 1534 { 1535 struct ucom_attach_args *ucaa = aux; 1536 1537 if (pnp) 1538 aprint_normal("ucom at %s", pnp); 1539 if (ucaa->ucaa_portno != UCOM_UNK_PORTNO) 1540 aprint_normal(" portno %d", ucaa->ucaa_portno); 1541 return UNCONF; 1542 } 1543 1544 int 1545 ucomsubmatch(device_t parent, cfdata_t cf, 1546 const int *ldesc, void *aux) 1547 { 1548 struct ucom_attach_args *ucaa = aux; 1549 1550 if (ucaa->ucaa_portno != UCOM_UNK_PORTNO && 1551 cf->cf_loc[UCOMBUSCF_PORTNO] != UCOMBUSCF_PORTNO_DEFAULT && 1552 cf->cf_loc[UCOMBUSCF_PORTNO] != ucaa->ucaa_portno) 1553 return 0; 1554 return config_match(parent, cf, aux); 1555 } 1556
Indexes created Sun Oct 19 02:09:48 GMT 2025