usb_serial.c revision 214831
1/* $NetBSD: ucom.c,v 1.40 2001/11/13 06:24:54 lukem Exp $ */ 2 3/*- 4 * Copyright (c) 2001-2003, 2005, 2008 5 * Shunsuke Akiyama <akiyama@jp.FreeBSD.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: head/sys/dev/usb/serial/usb_serial.c 214831 2010-11-05 09:06:23Z n_hibma $"); 32 33/*- 34 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 35 * All rights reserved. 36 * 37 * This code is derived from software contributed to The NetBSD Foundation 38 * by Lennart Augustsson (lennart@augustsson.net) at 39 * Carlstedt Research & Technology. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the NetBSD 52 * Foundation, Inc. and its contributors. 53 * 4. Neither the name of The NetBSD Foundation nor the names of its 54 * contributors may be used to endorse or promote products derived 55 * from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 58 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 59 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 60 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 61 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 62 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 63 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 64 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 65 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 66 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 67 * POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70#include <sys/stdint.h> 71#include <sys/stddef.h> 72#include <sys/param.h> 73#include <sys/queue.h> 74#include <sys/types.h> 75#include <sys/systm.h> 76#include <sys/kernel.h> 77#include <sys/bus.h> 78#include <sys/linker_set.h> 79#include <sys/module.h> 80#include <sys/lock.h> 81#include <sys/mutex.h> 82#include <sys/condvar.h> 83#include <sys/sysctl.h> 84#include <sys/sx.h> 85#include <sys/unistd.h> 86#include <sys/callout.h> 87#include <sys/malloc.h> 88#include <sys/priv.h> 89#include <sys/cons.h> 90#include <sys/kdb.h> 91 92#include <dev/usb/usb.h> 93#include <dev/usb/usbdi.h> 94#include <dev/usb/usbdi_util.h> 95 96#define USB_DEBUG_VAR ucom_debug 97#include <dev/usb/usb_debug.h> 98#include <dev/usb/usb_busdma.h> 99#include <dev/usb/usb_process.h> 100 101#include <dev/usb/serial/usb_serial.h> 102 103#include "opt_gdb.h" 104 105SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom"); 106 107#ifdef USB_DEBUG 108static int ucom_debug = 0; 109 110SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW, 111 &ucom_debug, 0, "ucom debug level"); 112#endif 113 114#define UCOM_CONS_BUFSIZE 1024 115 116static uint8_t ucom_cons_rx_buf[UCOM_CONS_BUFSIZE]; 117static uint8_t ucom_cons_tx_buf[UCOM_CONS_BUFSIZE]; 118 119static unsigned int ucom_cons_rx_low = 0; 120static unsigned int ucom_cons_rx_high = 0; 121 122static unsigned int ucom_cons_tx_low = 0; 123static unsigned int ucom_cons_tx_high = 0; 124 125static int ucom_cons_unit = -1; 126static int ucom_cons_subunit = 0; 127static int ucom_cons_baud = 9600; 128static struct ucom_softc *ucom_cons_softc = NULL; 129 130TUNABLE_INT("hw.usb.ucom.cons_unit", &ucom_cons_unit); 131SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_unit, CTLFLAG_RW, 132 &ucom_cons_unit, 0, "console unit number"); 133TUNABLE_INT("hw.usb.ucom.cons_subunit", &ucom_cons_subunit); 134SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_subunit, CTLFLAG_RW, 135 &ucom_cons_subunit, 0, "console subunit number"); 136TUNABLE_INT("hw.usb.ucom.cons_baud", &ucom_cons_baud); 137SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_baud, CTLFLAG_RW, 138 &ucom_cons_baud, 0, "console baud rate"); 139 140static usb_proc_callback_t ucom_cfg_start_transfers; 141static usb_proc_callback_t ucom_cfg_open; 142static usb_proc_callback_t ucom_cfg_close; 143static usb_proc_callback_t ucom_cfg_line_state; 144static usb_proc_callback_t ucom_cfg_status_change; 145static usb_proc_callback_t ucom_cfg_param; 146 147static int ucom_unit_alloc(void); 148static void ucom_unit_free(int); 149static int ucom_attach_tty(struct ucom_super_softc *, struct ucom_softc *); 150static void ucom_detach_tty(struct ucom_softc *); 151static void ucom_queue_command(struct ucom_softc *, 152 usb_proc_callback_t *, struct termios *pt, 153 struct usb_proc_msg *t0, struct usb_proc_msg *t1); 154static void ucom_shutdown(struct ucom_softc *); 155static void ucom_ring(struct ucom_softc *, uint8_t); 156static void ucom_break(struct ucom_softc *, uint8_t); 157static void ucom_dtr(struct ucom_softc *, uint8_t); 158static void ucom_rts(struct ucom_softc *, uint8_t); 159 160static tsw_open_t ucom_open; 161static tsw_close_t ucom_close; 162static tsw_ioctl_t ucom_ioctl; 163static tsw_modem_t ucom_modem; 164static tsw_param_t ucom_param; 165static tsw_outwakeup_t ucom_outwakeup; 166static tsw_free_t ucom_free; 167 168static struct ttydevsw ucom_class = { 169 .tsw_flags = TF_INITLOCK | TF_CALLOUT, 170 .tsw_open = ucom_open, 171 .tsw_close = ucom_close, 172 .tsw_outwakeup = ucom_outwakeup, 173 .tsw_ioctl = ucom_ioctl, 174 .tsw_param = ucom_param, 175 .tsw_modem = ucom_modem, 176 .tsw_free = ucom_free, 177}; 178 179MODULE_DEPEND(ucom, usb, 1, 1, 1); 180MODULE_VERSION(ucom, 1); 181 182#define UCOM_UNIT_MAX 128 /* limits size of ucom_bitmap */ 183 184static uint8_t ucom_bitmap[(UCOM_UNIT_MAX + 7) / 8]; 185static struct mtx ucom_bitmap_mtx; 186MTX_SYSINIT(ucom_bitmap_mtx, &ucom_bitmap_mtx, "ucom bitmap", MTX_DEF); 187 188/* 189 * Mark a unit number (the X in cuaUX) as in use. 190 * 191 * Note that devices using a different naming scheme (see ucom_tty_name() 192 * callback) still use this unit allocation. 193 */ 194static int 195ucom_unit_alloc(void) 196{ 197 int unit; 198 199 mtx_lock(&ucom_bitmap_mtx); 200 201 for (unit = 0; unit < UCOM_UNIT_MAX; unit++) 202 if ((ucom_bitmap[unit / 8] & (1 << (unit % 8))) == 0) 203 break; 204 205 mtx_unlock(&ucom_bitmap_mtx); 206 207 if (unit == UCOM_UNIT_MAX) 208 return -1; 209 else 210 return unit; 211} 212 213/* 214 * Mark the unit number as not in use. 215 */ 216static void 217ucom_unit_free(int unit) 218{ 219 mtx_lock(&ucom_bitmap_mtx); 220 221 ucom_bitmap[unit / 8] &= ~(1 << (unit % 8)); 222 223 mtx_unlock(&ucom_bitmap_mtx); 224} 225 226/* 227 * Setup a group of one or more serial ports. 228 * 229 * The mutex pointed to by "mtx" is applied before all 230 * callbacks are called back. Also "mtx" must be applied 231 * before calling into the ucom-layer! 232 */ 233int 234ucom_attach(struct ucom_super_softc *ssc, struct ucom_softc *sc, 235 uint32_t subunits, void *parent, 236 const struct ucom_callback *callback, struct mtx *mtx) 237{ 238 uint32_t subunit; 239 int error = 0; 240 241 if ((sc == NULL) || 242 (subunits == 0) || 243 (callback == NULL)) { 244 return (EINVAL); 245 } 246 247 ssc->sc_unit = ucom_unit_alloc(); 248 if (ssc->sc_unit == -1) 249 return (ENOMEM); 250 251 error = usb_proc_create(&ssc->sc_tq, mtx, "ucom", USB_PRI_MED); 252 if (error) { 253 ucom_unit_free(ssc->sc_unit); 254 return (error); 255 } 256 ssc->sc_subunits = subunits; 257 258 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) { 259 sc[subunit].sc_subunit = subunit; 260 sc[subunit].sc_super = ssc; 261 sc[subunit].sc_mtx = mtx; 262 sc[subunit].sc_parent = parent; 263 sc[subunit].sc_callback = callback; 264 265 error = ucom_attach_tty(ssc, &sc[subunit]); 266 if (error) { 267 ucom_detach(ssc, &sc[0]); 268 return (error); 269 } 270 sc[subunit].sc_flag |= UCOM_FLAG_ATTACHED; 271 } 272 273 DPRINTF("tp = %p, unit = %d, subunits = %d\n", 274 sc->sc_tty, ssc->sc_unit, ssc->sc_subunits); 275 276 return (0); 277} 278 279/* 280 * NOTE: the following function will do nothing if 281 * the structure pointed to by "ssc" and "sc" is zero. 282 */ 283void 284ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc) 285{ 286 uint32_t subunit; 287 288 usb_proc_drain(&ssc->sc_tq); 289 290 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) { 291 if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) { 292 293 ucom_detach_tty(&sc[subunit]); 294 295 /* avoid duplicate detach */ 296 sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED; 297 } 298 } 299 ucom_unit_free(ssc->sc_unit); 300 usb_proc_free(&ssc->sc_tq); 301} 302 303static int 304ucom_attach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc) 305{ 306 struct tty *tp; 307 char buf[32]; /* temporary TTY device name buffer */ 308 309 tp = tty_alloc_mutex(&ucom_class, sc, sc->sc_mtx); 310 if (tp == NULL) 311 return (ENOMEM); 312 313 /* Check if the client has a custom TTY name */ 314 buf[0] = '\0'; 315 if (sc->sc_callback->ucom_tty_name) { 316 sc->sc_callback->ucom_tty_name(sc, buf, 317 sizeof(buf), ssc->sc_unit, sc->sc_subunit); 318 } 319 if (buf[0] == 0) { 320 /* Use default TTY name */ 321 if (ssc->sc_subunits > 1) { 322 /* multiple modems in one */ 323 snprintf(buf, sizeof(buf), "U%u.%u", 324 ssc->sc_unit, sc->sc_subunit); 325 } else { 326 /* single modem */ 327 snprintf(buf, sizeof(buf), "U%u", ssc->sc_unit); 328 } 329 } 330 tty_makedev(tp, NULL, "%s", buf); 331 332 sc->sc_tty = tp; 333 334 DPRINTF("ttycreate: %s\n", buf); 335 cv_init(&sc->sc_cv, "ucom"); 336 337 /* Check if this device should be a console */ 338 if ((ucom_cons_softc == NULL) && 339 (ssc->sc_unit == ucom_cons_unit) && 340 (sc->sc_subunit == ucom_cons_subunit)) { 341 struct termios t; 342 343 DPRINTF("unit %d subunit %d is console", ssc->sc_unit, sc->sc_subunit); 344 345 ucom_cons_softc = sc; 346 347 memset(&t, 0, sizeof(t)); 348 t.c_ispeed = ucom_cons_baud; 349 t.c_ospeed = t.c_ispeed; 350 t.c_cflag = CS8; 351 352 mtx_lock(ucom_cons_softc->sc_mtx); 353 ucom_cons_rx_low = 0; 354 ucom_cons_rx_high = 0; 355 ucom_cons_tx_low = 0; 356 ucom_cons_tx_high = 0; 357 sc->sc_flag |= UCOM_FLAG_CONSOLE; 358 ucom_open(ucom_cons_softc->sc_tty); 359 ucom_param(ucom_cons_softc->sc_tty, &t); 360 mtx_unlock(ucom_cons_softc->sc_mtx); 361 } 362 363 return (0); 364} 365 366static void 367ucom_detach_tty(struct ucom_softc *sc) 368{ 369 struct tty *tp = sc->sc_tty; 370 371 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty); 372 373 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 374 mtx_lock(ucom_cons_softc->sc_mtx); 375 ucom_close(ucom_cons_softc->sc_tty); 376 sc->sc_flag &= ~UCOM_FLAG_CONSOLE; 377 mtx_unlock(ucom_cons_softc->sc_mtx); 378 ucom_cons_softc = NULL; 379 } 380 381 /* the config thread has been stopped when we get here */ 382 383 mtx_lock(sc->sc_mtx); 384 sc->sc_flag |= UCOM_FLAG_GONE; 385 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY); 386 mtx_unlock(sc->sc_mtx); 387 if (tp) { 388 tty_lock(tp); 389 390 ucom_close(tp); /* close, if any */ 391 392 tty_rel_gone(tp); 393 394 mtx_lock(sc->sc_mtx); 395 /* Wait for the callback after the TTY is torn down */ 396 while (sc->sc_ttyfreed == 0) 397 cv_wait(&sc->sc_cv, sc->sc_mtx); 398 /* 399 * make sure that read and write transfers are stopped 400 */ 401 if (sc->sc_callback->ucom_stop_read) { 402 (sc->sc_callback->ucom_stop_read) (sc); 403 } 404 if (sc->sc_callback->ucom_stop_write) { 405 (sc->sc_callback->ucom_stop_write) (sc); 406 } 407 mtx_unlock(sc->sc_mtx); 408 } 409 cv_destroy(&sc->sc_cv); 410} 411 412static void 413ucom_queue_command(struct ucom_softc *sc, 414 usb_proc_callback_t *fn, struct termios *pt, 415 struct usb_proc_msg *t0, struct usb_proc_msg *t1) 416{ 417 struct ucom_super_softc *ssc = sc->sc_super; 418 struct ucom_param_task *task; 419 420 mtx_assert(sc->sc_mtx, MA_OWNED); 421 422 if (usb_proc_is_gone(&ssc->sc_tq)) { 423 DPRINTF("proc is gone\n"); 424 return; /* nothing to do */ 425 } 426 /* 427 * NOTE: The task cannot get executed before we drop the 428 * "sc_mtx" mutex. It is safe to update fields in the message 429 * structure after that the message got queued. 430 */ 431 task = (struct ucom_param_task *) 432 usb_proc_msignal(&ssc->sc_tq, t0, t1); 433 434 /* Setup callback and softc pointers */ 435 task->hdr.pm_callback = fn; 436 task->sc = sc; 437 438 /* 439 * Make a copy of the termios. This field is only present if 440 * the "pt" field is not NULL. 441 */ 442 if (pt != NULL) 443 task->termios_copy = *pt; 444 445 /* 446 * Closing the device should be synchronous. 447 */ 448 if (fn == ucom_cfg_close) 449 usb_proc_mwait(&ssc->sc_tq, t0, t1); 450 451 /* 452 * In case of multiple configure requests, 453 * keep track of the last one! 454 */ 455 if (fn == ucom_cfg_start_transfers) 456 sc->sc_last_start_xfer = &task->hdr; 457} 458 459static void 460ucom_shutdown(struct ucom_softc *sc) 461{ 462 struct tty *tp = sc->sc_tty; 463 464 mtx_assert(sc->sc_mtx, MA_OWNED); 465 466 DPRINTF("\n"); 467 468 /* 469 * Hang up if necessary: 470 */ 471 if (tp->t_termios.c_cflag & HUPCL) { 472 ucom_modem(tp, 0, SER_DTR); 473 } 474} 475 476/* 477 * Return values: 478 * 0: normal 479 * else: taskqueue is draining or gone 480 */ 481uint8_t 482ucom_cfg_is_gone(struct ucom_softc *sc) 483{ 484 struct ucom_super_softc *ssc = sc->sc_super; 485 486 return (usb_proc_is_gone(&ssc->sc_tq)); 487} 488 489static void 490ucom_cfg_start_transfers(struct usb_proc_msg *_task) 491{ 492 struct ucom_cfg_task *task = 493 (struct ucom_cfg_task *)_task; 494 struct ucom_softc *sc = task->sc; 495 496 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 497 return; 498 } 499 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 500 /* TTY device closed */ 501 return; 502 } 503 504 if (_task == sc->sc_last_start_xfer) 505 sc->sc_flag |= UCOM_FLAG_GP_DATA; 506 507 if (sc->sc_callback->ucom_start_read) { 508 (sc->sc_callback->ucom_start_read) (sc); 509 } 510 if (sc->sc_callback->ucom_start_write) { 511 (sc->sc_callback->ucom_start_write) (sc); 512 } 513} 514 515static void 516ucom_start_transfers(struct ucom_softc *sc) 517{ 518 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 519 return; 520 } 521 /* 522 * Make sure that data transfers are started in both 523 * directions: 524 */ 525 if (sc->sc_callback->ucom_start_read) { 526 (sc->sc_callback->ucom_start_read) (sc); 527 } 528 if (sc->sc_callback->ucom_start_write) { 529 (sc->sc_callback->ucom_start_write) (sc); 530 } 531} 532 533static void 534ucom_cfg_open(struct usb_proc_msg *_task) 535{ 536 struct ucom_cfg_task *task = 537 (struct ucom_cfg_task *)_task; 538 struct ucom_softc *sc = task->sc; 539 540 DPRINTF("\n"); 541 542 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 543 544 /* already opened */ 545 546 } else { 547 548 sc->sc_flag |= UCOM_FLAG_LL_READY; 549 550 if (sc->sc_callback->ucom_cfg_open) { 551 (sc->sc_callback->ucom_cfg_open) (sc); 552 553 /* wait a little */ 554 usb_pause_mtx(sc->sc_mtx, hz / 10); 555 } 556 } 557} 558 559static int 560ucom_open(struct tty *tp) 561{ 562 struct ucom_softc *sc = tty_softc(tp); 563 int error; 564 565 mtx_assert(sc->sc_mtx, MA_OWNED); 566 567 if (sc->sc_flag & UCOM_FLAG_GONE) { 568 return (ENXIO); 569 } 570 if (sc->sc_flag & UCOM_FLAG_HL_READY) { 571 /* already opened */ 572 return (0); 573 } 574 DPRINTF("tp = %p\n", tp); 575 576 if (sc->sc_callback->ucom_pre_open) { 577 /* 578 * give the lower layer a chance to disallow TTY open, for 579 * example if the device is not present: 580 */ 581 error = (sc->sc_callback->ucom_pre_open) (sc); 582 if (error) { 583 return (error); 584 } 585 } 586 sc->sc_flag |= UCOM_FLAG_HL_READY; 587 588 /* Disable transfers */ 589 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 590 591 sc->sc_lsr = 0; 592 sc->sc_msr = 0; 593 sc->sc_mcr = 0; 594 595 /* reset programmed line state */ 596 sc->sc_pls_curr = 0; 597 sc->sc_pls_set = 0; 598 sc->sc_pls_clr = 0; 599 600 ucom_queue_command(sc, ucom_cfg_open, NULL, 601 &sc->sc_open_task[0].hdr, 602 &sc->sc_open_task[1].hdr); 603 604 /* Queue transfer enable command last */ 605 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 606 &sc->sc_start_task[0].hdr, 607 &sc->sc_start_task[1].hdr); 608 609 ucom_modem(tp, SER_DTR | SER_RTS, 0); 610 611 ucom_ring(sc, 0); 612 613 ucom_break(sc, 0); 614 615 ucom_status_change(sc); 616 617 return (0); 618} 619 620static void 621ucom_cfg_close(struct usb_proc_msg *_task) 622{ 623 struct ucom_cfg_task *task = 624 (struct ucom_cfg_task *)_task; 625 struct ucom_softc *sc = task->sc; 626 627 DPRINTF("\n"); 628 629 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 630 sc->sc_flag &= ~UCOM_FLAG_LL_READY; 631 if (sc->sc_callback->ucom_cfg_close) 632 (sc->sc_callback->ucom_cfg_close) (sc); 633 } else { 634 /* already closed */ 635 } 636} 637 638static void 639ucom_close(struct tty *tp) 640{ 641 struct ucom_softc *sc = tty_softc(tp); 642 643 mtx_assert(sc->sc_mtx, MA_OWNED); 644 645 DPRINTF("tp=%p\n", tp); 646 647 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 648 DPRINTF("tp=%p already closed\n", tp); 649 return; 650 } 651 ucom_shutdown(sc); 652 653 ucom_queue_command(sc, ucom_cfg_close, NULL, 654 &sc->sc_close_task[0].hdr, 655 &sc->sc_close_task[1].hdr); 656 657 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW); 658 659 if (sc->sc_callback->ucom_stop_read) { 660 (sc->sc_callback->ucom_stop_read) (sc); 661 } 662} 663 664static int 665ucom_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 666{ 667 struct ucom_softc *sc = tty_softc(tp); 668 int error; 669 670 mtx_assert(sc->sc_mtx, MA_OWNED); 671 672 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 673 return (EIO); 674 } 675 DPRINTF("cmd = 0x%08lx\n", cmd); 676 677 switch (cmd) { 678#if 0 679 case TIOCSRING: 680 ucom_ring(sc, 1); 681 error = 0; 682 break; 683 case TIOCCRING: 684 ucom_ring(sc, 0); 685 error = 0; 686 break; 687#endif 688 case TIOCSBRK: 689 ucom_break(sc, 1); 690 error = 0; 691 break; 692 case TIOCCBRK: 693 ucom_break(sc, 0); 694 error = 0; 695 break; 696 default: 697 if (sc->sc_callback->ucom_ioctl) { 698 error = (sc->sc_callback->ucom_ioctl) 699 (sc, cmd, data, 0, td); 700 } else { 701 error = ENOIOCTL; 702 } 703 break; 704 } 705 return (error); 706} 707 708static int 709ucom_modem(struct tty *tp, int sigon, int sigoff) 710{ 711 struct ucom_softc *sc = tty_softc(tp); 712 uint8_t onoff; 713 714 mtx_assert(sc->sc_mtx, MA_OWNED); 715 716 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 717 return (0); 718 } 719 if ((sigon == 0) && (sigoff == 0)) { 720 721 if (sc->sc_mcr & SER_DTR) { 722 sigon |= SER_DTR; 723 } 724 if (sc->sc_mcr & SER_RTS) { 725 sigon |= SER_RTS; 726 } 727 if (sc->sc_msr & SER_CTS) { 728 sigon |= SER_CTS; 729 } 730 if (sc->sc_msr & SER_DCD) { 731 sigon |= SER_DCD; 732 } 733 if (sc->sc_msr & SER_DSR) { 734 sigon |= SER_DSR; 735 } 736 if (sc->sc_msr & SER_RI) { 737 sigon |= SER_RI; 738 } 739 return (sigon); 740 } 741 if (sigon & SER_DTR) { 742 sc->sc_mcr |= SER_DTR; 743 } 744 if (sigoff & SER_DTR) { 745 sc->sc_mcr &= ~SER_DTR; 746 } 747 if (sigon & SER_RTS) { 748 sc->sc_mcr |= SER_RTS; 749 } 750 if (sigoff & SER_RTS) { 751 sc->sc_mcr &= ~SER_RTS; 752 } 753 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0; 754 ucom_dtr(sc, onoff); 755 756 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0; 757 ucom_rts(sc, onoff); 758 759 return (0); 760} 761 762static void 763ucom_cfg_line_state(struct usb_proc_msg *_task) 764{ 765 struct ucom_cfg_task *task = 766 (struct ucom_cfg_task *)_task; 767 struct ucom_softc *sc = task->sc; 768 uint8_t notch_bits; 769 uint8_t any_bits; 770 uint8_t prev_value; 771 uint8_t last_value; 772 uint8_t mask; 773 774 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 775 return; 776 } 777 778 mask = 0; 779 /* compute callback mask */ 780 if (sc->sc_callback->ucom_cfg_set_dtr) 781 mask |= UCOM_LS_DTR; 782 if (sc->sc_callback->ucom_cfg_set_rts) 783 mask |= UCOM_LS_RTS; 784 if (sc->sc_callback->ucom_cfg_set_break) 785 mask |= UCOM_LS_BREAK; 786 if (sc->sc_callback->ucom_cfg_set_ring) 787 mask |= UCOM_LS_RING; 788 789 /* compute the bits we are to program */ 790 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask; 791 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask; 792 prev_value = sc->sc_pls_curr ^ notch_bits; 793 last_value = sc->sc_pls_curr; 794 795 /* reset programmed line state */ 796 sc->sc_pls_curr = 0; 797 sc->sc_pls_set = 0; 798 sc->sc_pls_clr = 0; 799 800 /* ensure that we don't loose any levels */ 801 if (notch_bits & UCOM_LS_DTR) 802 sc->sc_callback->ucom_cfg_set_dtr(sc, 803 (prev_value & UCOM_LS_DTR) ? 1 : 0); 804 if (notch_bits & UCOM_LS_RTS) 805 sc->sc_callback->ucom_cfg_set_rts(sc, 806 (prev_value & UCOM_LS_RTS) ? 1 : 0); 807 if (notch_bits & UCOM_LS_BREAK) 808 sc->sc_callback->ucom_cfg_set_break(sc, 809 (prev_value & UCOM_LS_BREAK) ? 1 : 0); 810 if (notch_bits & UCOM_LS_RING) 811 sc->sc_callback->ucom_cfg_set_ring(sc, 812 (prev_value & UCOM_LS_RING) ? 1 : 0); 813 814 /* set last value */ 815 if (any_bits & UCOM_LS_DTR) 816 sc->sc_callback->ucom_cfg_set_dtr(sc, 817 (last_value & UCOM_LS_DTR) ? 1 : 0); 818 if (any_bits & UCOM_LS_RTS) 819 sc->sc_callback->ucom_cfg_set_rts(sc, 820 (last_value & UCOM_LS_RTS) ? 1 : 0); 821 if (any_bits & UCOM_LS_BREAK) 822 sc->sc_callback->ucom_cfg_set_break(sc, 823 (last_value & UCOM_LS_BREAK) ? 1 : 0); 824 if (any_bits & UCOM_LS_RING) 825 sc->sc_callback->ucom_cfg_set_ring(sc, 826 (last_value & UCOM_LS_RING) ? 1 : 0); 827} 828 829static void 830ucom_line_state(struct ucom_softc *sc, 831 uint8_t set_bits, uint8_t clear_bits) 832{ 833 mtx_assert(sc->sc_mtx, MA_OWNED); 834 835 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 836 return; 837 } 838 839 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits); 840 841 /* update current programmed line state */ 842 sc->sc_pls_curr |= set_bits; 843 sc->sc_pls_curr &= ~clear_bits; 844 sc->sc_pls_set |= set_bits; 845 sc->sc_pls_clr |= clear_bits; 846 847 /* defer driver programming */ 848 ucom_queue_command(sc, ucom_cfg_line_state, NULL, 849 &sc->sc_line_state_task[0].hdr, 850 &sc->sc_line_state_task[1].hdr); 851} 852 853static void 854ucom_ring(struct ucom_softc *sc, uint8_t onoff) 855{ 856 DPRINTF("onoff = %d\n", onoff); 857 858 if (onoff) 859 ucom_line_state(sc, UCOM_LS_RING, 0); 860 else 861 ucom_line_state(sc, 0, UCOM_LS_RING); 862} 863 864static void 865ucom_break(struct ucom_softc *sc, uint8_t onoff) 866{ 867 DPRINTF("onoff = %d\n", onoff); 868 869 if (onoff) 870 ucom_line_state(sc, UCOM_LS_BREAK, 0); 871 else 872 ucom_line_state(sc, 0, UCOM_LS_BREAK); 873} 874 875static void 876ucom_dtr(struct ucom_softc *sc, uint8_t onoff) 877{ 878 DPRINTF("onoff = %d\n", onoff); 879 880 if (onoff) 881 ucom_line_state(sc, UCOM_LS_DTR, 0); 882 else 883 ucom_line_state(sc, 0, UCOM_LS_DTR); 884} 885 886static void 887ucom_rts(struct ucom_softc *sc, uint8_t onoff) 888{ 889 DPRINTF("onoff = %d\n", onoff); 890 891 if (onoff) 892 ucom_line_state(sc, UCOM_LS_RTS, 0); 893 else 894 ucom_line_state(sc, 0, UCOM_LS_RTS); 895} 896 897static void 898ucom_cfg_status_change(struct usb_proc_msg *_task) 899{ 900 struct ucom_cfg_task *task = 901 (struct ucom_cfg_task *)_task; 902 struct ucom_softc *sc = task->sc; 903 struct tty *tp; 904 uint8_t new_msr; 905 uint8_t new_lsr; 906 uint8_t onoff; 907 uint8_t lsr_delta; 908 909 tp = sc->sc_tty; 910 911 mtx_assert(sc->sc_mtx, MA_OWNED); 912 913 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 914 return; 915 } 916 if (sc->sc_callback->ucom_cfg_get_status == NULL) { 917 return; 918 } 919 /* get status */ 920 921 new_msr = 0; 922 new_lsr = 0; 923 924 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr); 925 926 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 927 /* TTY device closed */ 928 return; 929 } 930 onoff = ((sc->sc_msr ^ new_msr) & SER_DCD); 931 lsr_delta = (sc->sc_lsr ^ new_lsr); 932 933 sc->sc_msr = new_msr; 934 sc->sc_lsr = new_lsr; 935 936 if (onoff) { 937 938 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0; 939 940 DPRINTF("DCD changed to %d\n", onoff); 941 942 ttydisc_modem(tp, onoff); 943 } 944 945 if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) { 946 947 DPRINTF("BREAK detected\n"); 948 949 ttydisc_rint(tp, 0, TRE_BREAK); 950 ttydisc_rint_done(tp); 951 } 952 953 if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) { 954 955 DPRINTF("Frame error detected\n"); 956 957 ttydisc_rint(tp, 0, TRE_FRAMING); 958 ttydisc_rint_done(tp); 959 } 960 961 if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) { 962 963 DPRINTF("Parity error detected\n"); 964 965 ttydisc_rint(tp, 0, TRE_PARITY); 966 ttydisc_rint_done(tp); 967 } 968} 969 970void 971ucom_status_change(struct ucom_softc *sc) 972{ 973 mtx_assert(sc->sc_mtx, MA_OWNED); 974 975 if (sc->sc_flag & UCOM_FLAG_CONSOLE) 976 return; /* not supported */ 977 978 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 979 return; 980 } 981 DPRINTF("\n"); 982 983 ucom_queue_command(sc, ucom_cfg_status_change, NULL, 984 &sc->sc_status_task[0].hdr, 985 &sc->sc_status_task[1].hdr); 986} 987 988static void 989ucom_cfg_param(struct usb_proc_msg *_task) 990{ 991 struct ucom_param_task *task = 992 (struct ucom_param_task *)_task; 993 struct ucom_softc *sc = task->sc; 994 995 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 996 return; 997 } 998 if (sc->sc_callback->ucom_cfg_param == NULL) { 999 return; 1000 } 1001 1002 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy); 1003 1004 /* wait a little */ 1005 usb_pause_mtx(sc->sc_mtx, hz / 10); 1006} 1007 1008static int 1009ucom_param(struct tty *tp, struct termios *t) 1010{ 1011 struct ucom_softc *sc = tty_softc(tp); 1012 uint8_t opened; 1013 int error; 1014 1015 mtx_assert(sc->sc_mtx, MA_OWNED); 1016 1017 opened = 0; 1018 error = 0; 1019 1020 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1021 1022 /* XXX the TTY layer should call "open()" first! */ 1023 1024 error = ucom_open(tp); 1025 if (error) { 1026 goto done; 1027 } 1028 opened = 1; 1029 } 1030 DPRINTF("sc = %p\n", sc); 1031 1032 /* Check requested parameters. */ 1033 if (t->c_ospeed < 0) { 1034 DPRINTF("negative ospeed\n"); 1035 error = EINVAL; 1036 goto done; 1037 } 1038 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) { 1039 DPRINTF("mismatch ispeed and ospeed\n"); 1040 error = EINVAL; 1041 goto done; 1042 } 1043 t->c_ispeed = t->c_ospeed; 1044 1045 if (sc->sc_callback->ucom_pre_param) { 1046 /* Let the lower layer verify the parameters */ 1047 error = (sc->sc_callback->ucom_pre_param) (sc, t); 1048 if (error) { 1049 DPRINTF("callback error = %d\n", error); 1050 goto done; 1051 } 1052 } 1053 1054 /* Disable transfers */ 1055 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 1056 1057 /* Queue baud rate programming command first */ 1058 ucom_queue_command(sc, ucom_cfg_param, t, 1059 &sc->sc_param_task[0].hdr, 1060 &sc->sc_param_task[1].hdr); 1061 1062 /* Queue transfer enable command last */ 1063 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 1064 &sc->sc_start_task[0].hdr, 1065 &sc->sc_start_task[1].hdr); 1066 1067 if (t->c_cflag & CRTS_IFLOW) { 1068 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW; 1069 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) { 1070 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW; 1071 ucom_modem(tp, SER_RTS, 0); 1072 } 1073done: 1074 if (error) { 1075 if (opened) { 1076 ucom_close(tp); 1077 } 1078 } 1079 return (error); 1080} 1081 1082static void 1083ucom_outwakeup(struct tty *tp) 1084{ 1085 struct ucom_softc *sc = tty_softc(tp); 1086 1087 mtx_assert(sc->sc_mtx, MA_OWNED); 1088 1089 DPRINTF("sc = %p\n", sc); 1090 1091 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1092 /* The higher layer is not ready */ 1093 return; 1094 } 1095 ucom_start_transfers(sc); 1096} 1097 1098/*------------------------------------------------------------------------* 1099 * ucom_get_data 1100 * 1101 * Return values: 1102 * 0: No data is available. 1103 * Else: Data is available. 1104 *------------------------------------------------------------------------*/ 1105uint8_t 1106ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1107 uint32_t offset, uint32_t len, uint32_t *actlen) 1108{ 1109 struct usb_page_search res; 1110 struct tty *tp = sc->sc_tty; 1111 uint32_t cnt; 1112 uint32_t offset_orig; 1113 1114 mtx_assert(sc->sc_mtx, MA_OWNED); 1115 1116 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1117 unsigned int temp; 1118 1119 /* get total TX length */ 1120 1121 temp = ucom_cons_tx_high - ucom_cons_tx_low; 1122 temp %= UCOM_CONS_BUFSIZE; 1123 1124 /* limit TX length */ 1125 1126 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low)) 1127 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low); 1128 1129 if (temp > len) 1130 temp = len; 1131 1132 /* copy in data */ 1133 1134 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp); 1135 1136 /* update counters */ 1137 1138 ucom_cons_tx_low += temp; 1139 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE; 1140 1141 /* store actual length */ 1142 1143 *actlen = temp; 1144 1145 return (temp ? 1 : 0); 1146 } 1147 1148 if (tty_gone(tp) || 1149 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) { 1150 actlen[0] = 0; 1151 return (0); /* multiport device polling */ 1152 } 1153 offset_orig = offset; 1154 1155 while (len != 0) { 1156 1157 usbd_get_page(pc, offset, &res); 1158 1159 if (res.length > len) { 1160 res.length = len; 1161 } 1162 /* copy data directly into USB buffer */ 1163 cnt = ttydisc_getc(tp, res.buffer, res.length); 1164 1165 offset += cnt; 1166 len -= cnt; 1167 1168 if (cnt < res.length) { 1169 /* end of buffer */ 1170 break; 1171 } 1172 } 1173 1174 actlen[0] = offset - offset_orig; 1175 1176 DPRINTF("cnt=%d\n", actlen[0]); 1177 1178 if (actlen[0] == 0) { 1179 return (0); 1180 } 1181 return (1); 1182} 1183 1184void 1185ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1186 uint32_t offset, uint32_t len) 1187{ 1188 struct usb_page_search res; 1189 struct tty *tp = sc->sc_tty; 1190 char *buf; 1191 uint32_t cnt; 1192 1193 mtx_assert(sc->sc_mtx, MA_OWNED); 1194 1195 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1196 unsigned int temp; 1197 1198 /* get maximum RX length */ 1199 1200 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low; 1201 temp %= UCOM_CONS_BUFSIZE; 1202 1203 /* limit RX length */ 1204 1205 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high)) 1206 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high); 1207 1208 if (temp > len) 1209 temp = len; 1210 1211 /* copy out data */ 1212 1213 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp); 1214 1215 /* update counters */ 1216 1217 ucom_cons_rx_high += temp; 1218 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE; 1219 1220 return; 1221 } 1222 1223 if (tty_gone(tp)) 1224 return; /* multiport device polling */ 1225 1226 if (len == 0) 1227 return; /* no data */ 1228 1229 /* set a flag to prevent recursation ? */ 1230 1231 while (len > 0) { 1232 1233 usbd_get_page(pc, offset, &res); 1234 1235 if (res.length > len) { 1236 res.length = len; 1237 } 1238 len -= res.length; 1239 offset += res.length; 1240 1241 /* pass characters to tty layer */ 1242 1243 buf = res.buffer; 1244 cnt = res.length; 1245 1246 /* first check if we can pass the buffer directly */ 1247 1248 if (ttydisc_can_bypass(tp)) { 1249 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) { 1250 DPRINTF("tp=%p, data lost\n", tp); 1251 } 1252 continue; 1253 } 1254 /* need to loop */ 1255 1256 for (cnt = 0; cnt != res.length; cnt++) { 1257 if (ttydisc_rint(tp, buf[cnt], 0) == -1) { 1258 /* XXX what should we do? */ 1259 1260 DPRINTF("tp=%p, lost %d " 1261 "chars\n", tp, res.length - cnt); 1262 break; 1263 } 1264 } 1265 } 1266 ttydisc_rint_done(tp); 1267} 1268 1269static void 1270ucom_free(void *xsc) 1271{ 1272 struct ucom_softc *sc = xsc; 1273 1274 mtx_lock(sc->sc_mtx); 1275 sc->sc_ttyfreed = 1; 1276 cv_signal(&sc->sc_cv); 1277 mtx_unlock(sc->sc_mtx); 1278} 1279 1280static cn_probe_t ucom_cnprobe; 1281static cn_init_t ucom_cninit; 1282static cn_term_t ucom_cnterm; 1283static cn_getc_t ucom_cngetc; 1284static cn_putc_t ucom_cnputc; 1285 1286CONSOLE_DRIVER(ucom); 1287 1288static void 1289ucom_cnprobe(struct consdev *cp) 1290{ 1291 if (ucom_cons_unit != -1) 1292 cp->cn_pri = CN_NORMAL; 1293 else 1294 cp->cn_pri = CN_DEAD; 1295 1296 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name)); 1297} 1298 1299static void 1300ucom_cninit(struct consdev *cp) 1301{ 1302} 1303 1304static void 1305ucom_cnterm(struct consdev *cp) 1306{ 1307} 1308 1309static int 1310ucom_cngetc(struct consdev *cd) 1311{ 1312 struct ucom_softc *sc = ucom_cons_softc; 1313 int c; 1314 1315 if (sc == NULL) 1316 return (-1); 1317 1318 mtx_lock(sc->sc_mtx); 1319 1320 if (ucom_cons_rx_low != ucom_cons_rx_high) { 1321 c = ucom_cons_rx_buf[ucom_cons_rx_low]; 1322 ucom_cons_rx_low ++; 1323 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE; 1324 } else { 1325 c = -1; 1326 } 1327 1328 /* start USB transfers */ 1329 ucom_outwakeup(sc->sc_tty); 1330 1331 mtx_unlock(sc->sc_mtx); 1332 1333 /* poll if necessary */ 1334 if (kdb_active && sc->sc_callback->ucom_poll) 1335 (sc->sc_callback->ucom_poll) (sc); 1336 1337 return (c); 1338} 1339 1340static void 1341ucom_cnputc(struct consdev *cd, int c) 1342{ 1343 struct ucom_softc *sc = ucom_cons_softc; 1344 unsigned int temp; 1345 1346 if (sc == NULL) 1347 return; 1348 1349 repeat: 1350 1351 mtx_lock(sc->sc_mtx); 1352 1353 /* compute maximum TX length */ 1354 1355 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low; 1356 temp %= UCOM_CONS_BUFSIZE; 1357 1358 if (temp) { 1359 ucom_cons_tx_buf[ucom_cons_tx_high] = c; 1360 ucom_cons_tx_high ++; 1361 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE; 1362 } 1363 1364 /* start USB transfers */ 1365 ucom_outwakeup(sc->sc_tty); 1366 1367 mtx_unlock(sc->sc_mtx); 1368 1369 /* poll if necessary */ 1370 if (kdb_active && sc->sc_callback->ucom_poll) { 1371 (sc->sc_callback->ucom_poll) (sc); 1372 /* simple flow control */ 1373 if (temp == 0) 1374 goto repeat; 1375 } 1376} 1377 1378#if defined(GDB) 1379 1380#include <gdb/gdb.h> 1381 1382static gdb_probe_f ucom_gdbprobe; 1383static gdb_init_f ucom_gdbinit; 1384static gdb_term_f ucom_gdbterm; 1385static gdb_getc_f ucom_gdbgetc; 1386static gdb_putc_f ucom_gdbputc; 1387 1388GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc); 1389 1390static int 1391ucom_gdbprobe(void) 1392{ 1393 return ((ucom_cons_softc != NULL) ? 0 : -1); 1394} 1395 1396static void 1397ucom_gdbinit(void) 1398{ 1399} 1400 1401static void 1402ucom_gdbterm(void) 1403{ 1404} 1405 1406static void 1407ucom_gdbputc(int c) 1408{ 1409 ucom_cnputc(NULL, c); 1410} 1411 1412static int 1413ucom_gdbgetc(void) 1414{ 1415 return (ucom_cngetc(NULL)); 1416} 1417 1418#endif 1419