usb_serial.c revision 198774
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 198774 2009-11-01 21:41:44Z thompsa $"); 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#if 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_baud = 9600; 127static struct ucom_softc *ucom_cons_softc = NULL; 128 129TUNABLE_INT("hw.usb.ucom.cons_unit", &ucom_cons_unit); 130SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_unit, CTLFLAG_RW, 131 &ucom_cons_unit, 0, "console unit number"); 132 133TUNABLE_INT("hw.usb.ucom.cons_baud", &ucom_cons_baud); 134SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_baud, CTLFLAG_RW, 135 &ucom_cons_baud, 0, "console baud rate"); 136 137static usb_proc_callback_t ucom_cfg_start_transfers; 138static usb_proc_callback_t ucom_cfg_open; 139static usb_proc_callback_t ucom_cfg_close; 140static usb_proc_callback_t ucom_cfg_line_state; 141static usb_proc_callback_t ucom_cfg_status_change; 142static usb_proc_callback_t ucom_cfg_param; 143 144static uint8_t ucom_units_alloc(uint32_t, uint32_t *); 145static void ucom_units_free(uint32_t, uint32_t); 146static int ucom_attach_tty(struct ucom_softc *, uint32_t); 147static void ucom_detach_tty(struct ucom_softc *); 148static void ucom_queue_command(struct ucom_softc *, 149 usb_proc_callback_t *, struct termios *pt, 150 struct usb_proc_msg *t0, struct usb_proc_msg *t1); 151static void ucom_shutdown(struct ucom_softc *); 152static void ucom_ring(struct ucom_softc *, uint8_t); 153static void ucom_break(struct ucom_softc *, uint8_t); 154static void ucom_dtr(struct ucom_softc *, uint8_t); 155static void ucom_rts(struct ucom_softc *, uint8_t); 156 157static tsw_open_t ucom_open; 158static tsw_close_t ucom_close; 159static tsw_ioctl_t ucom_ioctl; 160static tsw_modem_t ucom_modem; 161static tsw_param_t ucom_param; 162static tsw_outwakeup_t ucom_outwakeup; 163static tsw_free_t ucom_free; 164 165static struct ttydevsw ucom_class = { 166 .tsw_flags = TF_INITLOCK | TF_CALLOUT, 167 .tsw_open = ucom_open, 168 .tsw_close = ucom_close, 169 .tsw_outwakeup = ucom_outwakeup, 170 .tsw_ioctl = ucom_ioctl, 171 .tsw_param = ucom_param, 172 .tsw_modem = ucom_modem, 173 .tsw_free = ucom_free, 174}; 175 176MODULE_DEPEND(ucom, usb, 1, 1, 1); 177MODULE_VERSION(ucom, 1); 178 179#define UCOM_UNIT_MAX 0x200 /* exclusive */ 180#define UCOM_SUB_UNIT_MAX 0x100 /* exclusive */ 181 182static uint8_t ucom_bitmap[(UCOM_UNIT_MAX + 7) / 8]; 183static struct mtx ucom_bitmap_mtx; 184MTX_SYSINIT(ucom_bitmap_mtx, &ucom_bitmap_mtx, "ucom bitmap", MTX_DEF); 185 186static uint8_t 187ucom_units_alloc(uint32_t sub_units, uint32_t *p_root_unit) 188{ 189 uint32_t n; 190 uint32_t o; 191 uint32_t x; 192 uint32_t max = UCOM_UNIT_MAX - (UCOM_UNIT_MAX % sub_units); 193 uint8_t error = 1; 194 195 mtx_lock(&ucom_bitmap_mtx); 196 197 for (n = 0; n < max; n += sub_units) { 198 199 /* check for free consecutive bits */ 200 201 for (o = 0; o < sub_units; o++) { 202 203 x = n + o; 204 205 if (ucom_bitmap[x / 8] & (1 << (x % 8))) { 206 goto skip; 207 } 208 } 209 210 /* allocate */ 211 212 for (o = 0; o < sub_units; o++) { 213 214 x = n + o; 215 216 ucom_bitmap[x / 8] |= (1 << (x % 8)); 217 } 218 219 error = 0; 220 221 break; 222 223skip: ; 224 } 225 226 mtx_unlock(&ucom_bitmap_mtx); 227 228 /* 229 * Always set the variable pointed to by "p_root_unit" so that 230 * the compiler does not think that it is used uninitialised: 231 */ 232 *p_root_unit = n; 233 234 return (error); 235} 236 237static void 238ucom_units_free(uint32_t root_unit, uint32_t sub_units) 239{ 240 uint32_t x; 241 242 mtx_lock(&ucom_bitmap_mtx); 243 244 while (sub_units--) { 245 x = root_unit + sub_units; 246 ucom_bitmap[x / 8] &= ~(1 << (x % 8)); 247 } 248 249 mtx_unlock(&ucom_bitmap_mtx); 250} 251 252/* 253 * "N" sub_units are setup at a time. All sub-units will 254 * be given sequential unit numbers. The number of 255 * sub-units can be used to differentiate among 256 * different types of devices. 257 * 258 * The mutex pointed to by "mtx" is applied before all 259 * callbacks are called back. Also "mtx" must be applied 260 * before calling into the ucom-layer! 261 */ 262int 263ucom_attach(struct ucom_super_softc *ssc, struct ucom_softc *sc, 264 uint32_t sub_units, void *parent, 265 const struct ucom_callback *callback, struct mtx *mtx) 266{ 267 uint32_t n; 268 uint32_t root_unit; 269 int error = 0; 270 271 if ((sc == NULL) || 272 (sub_units == 0) || 273 (sub_units > UCOM_SUB_UNIT_MAX) || 274 (callback == NULL)) { 275 return (EINVAL); 276 } 277 278 /* XXX unit management does not really belong here */ 279 if (ucom_units_alloc(sub_units, &root_unit)) { 280 return (ENOMEM); 281 } 282 283 error = usb_proc_create(&ssc->sc_tq, mtx, "ucom", USB_PRI_MED); 284 if (error) { 285 ucom_units_free(root_unit, sub_units); 286 return (error); 287 } 288 289 for (n = 0; n != sub_units; n++, sc++) { 290 sc->sc_unit = root_unit + n; 291 sc->sc_local_unit = n; 292 sc->sc_super = ssc; 293 sc->sc_mtx = mtx; 294 sc->sc_parent = parent; 295 sc->sc_callback = callback; 296 297 error = ucom_attach_tty(sc, sub_units); 298 if (error) { 299 ucom_detach(ssc, sc - n, n); 300 ucom_units_free(root_unit + n, sub_units - n); 301 return (error); 302 } 303 sc->sc_flag |= UCOM_FLAG_ATTACHED; 304 } 305 return (0); 306} 307 308/* 309 * NOTE: the following function will do nothing if 310 * the structure pointed to by "ssc" and "sc" is zero. 311 */ 312void 313ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc, 314 uint32_t sub_units) 315{ 316 uint32_t n; 317 318 usb_proc_drain(&ssc->sc_tq); 319 320 for (n = 0; n != sub_units; n++, sc++) { 321 if (sc->sc_flag & UCOM_FLAG_ATTACHED) { 322 323 ucom_detach_tty(sc); 324 325 ucom_units_free(sc->sc_unit, 1); 326 327 /* avoid duplicate detach: */ 328 sc->sc_flag &= ~UCOM_FLAG_ATTACHED; 329 } 330 } 331 usb_proc_free(&ssc->sc_tq); 332} 333 334static int 335ucom_attach_tty(struct ucom_softc *sc, uint32_t sub_units) 336{ 337 struct tty *tp; 338 int error = 0; 339 char buf[32]; /* temporary TTY device name buffer */ 340 341 tp = tty_alloc_mutex(&ucom_class, sc, sc->sc_mtx); 342 if (tp == NULL) { 343 error = ENOMEM; 344 goto done; 345 } 346 DPRINTF("tp = %p, unit = %d\n", tp, sc->sc_unit); 347 348 buf[0] = 0; /* set some default value */ 349 350 /* Check if the client has a custom TTY name */ 351 if (sc->sc_callback->ucom_tty_name) { 352 sc->sc_callback->ucom_tty_name(sc, buf, 353 sizeof(buf), sc->sc_local_unit); 354 } 355 if (buf[0] == 0) { 356 /* Use default TTY name */ 357 if (sub_units > 1) { 358 /* multiple modems in one */ 359 if (snprintf(buf, sizeof(buf), "U%u.%u", 360 sc->sc_unit - sc->sc_local_unit, 361 sc->sc_local_unit)) { 362 /* ignore */ 363 } 364 } else { 365 /* single modem */ 366 if (snprintf(buf, sizeof(buf), "U%u", sc->sc_unit)) { 367 /* ignore */ 368 } 369 } 370 } 371 tty_makedev(tp, NULL, "%s", buf); 372 373 sc->sc_tty = tp; 374 375 DPRINTF("ttycreate: %s\n", buf); 376 cv_init(&sc->sc_cv, "ucom"); 377 378 /* Check if this device should be a console */ 379 if ((ucom_cons_softc == NULL) && 380 (sc->sc_unit == ucom_cons_unit)) { 381 382 struct termios t; 383 384 ucom_cons_softc = sc; 385 386 memset(&t, 0, sizeof(t)); 387 t.c_ispeed = ucom_cons_baud; 388 t.c_ospeed = t.c_ispeed; 389 t.c_cflag = CS8; 390 391 mtx_lock(ucom_cons_softc->sc_mtx); 392 ucom_cons_rx_low = 0; 393 ucom_cons_rx_high = 0; 394 ucom_cons_tx_low = 0; 395 ucom_cons_tx_high = 0; 396 sc->sc_flag |= UCOM_FLAG_CONSOLE; 397 ucom_open(ucom_cons_softc->sc_tty); 398 ucom_param(ucom_cons_softc->sc_tty, &t); 399 mtx_unlock(ucom_cons_softc->sc_mtx); 400 } 401done: 402 return (error); 403} 404 405static void 406ucom_detach_tty(struct ucom_softc *sc) 407{ 408 struct tty *tp = sc->sc_tty; 409 410 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty); 411 412 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 413 mtx_lock(ucom_cons_softc->sc_mtx); 414 ucom_close(ucom_cons_softc->sc_tty); 415 mtx_unlock(ucom_cons_softc->sc_mtx); 416 ucom_cons_softc = NULL; 417 } 418 419 /* the config thread has been stopped when we get here */ 420 421 mtx_lock(sc->sc_mtx); 422 sc->sc_flag |= UCOM_FLAG_GONE; 423 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY); 424 mtx_unlock(sc->sc_mtx); 425 if (tp) { 426 tty_lock(tp); 427 428 ucom_close(tp); /* close, if any */ 429 430 tty_rel_gone(tp); 431 432 mtx_lock(sc->sc_mtx); 433 /* Wait for the callback after the TTY is torn down */ 434 while (sc->sc_ttyfreed == 0) 435 cv_wait(&sc->sc_cv, sc->sc_mtx); 436 /* 437 * make sure that read and write transfers are stopped 438 */ 439 if (sc->sc_callback->ucom_stop_read) { 440 (sc->sc_callback->ucom_stop_read) (sc); 441 } 442 if (sc->sc_callback->ucom_stop_write) { 443 (sc->sc_callback->ucom_stop_write) (sc); 444 } 445 mtx_unlock(sc->sc_mtx); 446 } 447 cv_destroy(&sc->sc_cv); 448} 449 450static void 451ucom_queue_command(struct ucom_softc *sc, 452 usb_proc_callback_t *fn, struct termios *pt, 453 struct usb_proc_msg *t0, struct usb_proc_msg *t1) 454{ 455 struct ucom_super_softc *ssc = sc->sc_super; 456 struct ucom_param_task *task; 457 458 mtx_assert(sc->sc_mtx, MA_OWNED); 459 460 if (usb_proc_is_gone(&ssc->sc_tq)) { 461 DPRINTF("proc is gone\n"); 462 return; /* nothing to do */ 463 } 464 /* 465 * NOTE: The task cannot get executed before we drop the 466 * "sc_mtx" mutex. It is safe to update fields in the message 467 * structure after that the message got queued. 468 */ 469 task = (struct ucom_param_task *) 470 usb_proc_msignal(&ssc->sc_tq, t0, t1); 471 472 /* Setup callback and softc pointers */ 473 task->hdr.pm_callback = fn; 474 task->sc = sc; 475 476 /* 477 * Make a copy of the termios. This field is only present if 478 * the "pt" field is not NULL. 479 */ 480 if (pt != NULL) 481 task->termios_copy = *pt; 482 483 /* 484 * Closing the device should be synchronous. 485 */ 486 if (fn == ucom_cfg_close) 487 usb_proc_mwait(&ssc->sc_tq, t0, t1); 488 489 /* 490 * In case of multiple configure requests, 491 * keep track of the last one! 492 */ 493 if (fn == ucom_cfg_start_transfers) 494 sc->sc_last_start_xfer = &task->hdr; 495} 496 497static void 498ucom_shutdown(struct ucom_softc *sc) 499{ 500 struct tty *tp = sc->sc_tty; 501 502 mtx_assert(sc->sc_mtx, MA_OWNED); 503 504 DPRINTF("\n"); 505 506 /* 507 * Hang up if necessary: 508 */ 509 if (tp->t_termios.c_cflag & HUPCL) { 510 ucom_modem(tp, 0, SER_DTR); 511 } 512} 513 514/* 515 * Return values: 516 * 0: normal 517 * else: taskqueue is draining or gone 518 */ 519uint8_t 520ucom_cfg_is_gone(struct ucom_softc *sc) 521{ 522 struct ucom_super_softc *ssc = sc->sc_super; 523 524 return (usb_proc_is_gone(&ssc->sc_tq)); 525} 526 527static void 528ucom_cfg_start_transfers(struct usb_proc_msg *_task) 529{ 530 struct ucom_cfg_task *task = 531 (struct ucom_cfg_task *)_task; 532 struct ucom_softc *sc = task->sc; 533 534 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 535 return; 536 } 537 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 538 /* TTY device closed */ 539 return; 540 } 541 542 if (_task == sc->sc_last_start_xfer) 543 sc->sc_flag |= UCOM_FLAG_GP_DATA; 544 545 if (sc->sc_callback->ucom_start_read) { 546 (sc->sc_callback->ucom_start_read) (sc); 547 } 548 if (sc->sc_callback->ucom_start_write) { 549 (sc->sc_callback->ucom_start_write) (sc); 550 } 551} 552 553static void 554ucom_start_transfers(struct ucom_softc *sc) 555{ 556 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 557 return; 558 } 559 /* 560 * Make sure that data transfers are started in both 561 * directions: 562 */ 563 if (sc->sc_callback->ucom_start_read) { 564 (sc->sc_callback->ucom_start_read) (sc); 565 } 566 if (sc->sc_callback->ucom_start_write) { 567 (sc->sc_callback->ucom_start_write) (sc); 568 } 569} 570 571static void 572ucom_cfg_open(struct usb_proc_msg *_task) 573{ 574 struct ucom_cfg_task *task = 575 (struct ucom_cfg_task *)_task; 576 struct ucom_softc *sc = task->sc; 577 578 DPRINTF("\n"); 579 580 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 581 582 /* already opened */ 583 584 } else { 585 586 sc->sc_flag |= UCOM_FLAG_LL_READY; 587 588 if (sc->sc_callback->ucom_cfg_open) { 589 (sc->sc_callback->ucom_cfg_open) (sc); 590 591 /* wait a little */ 592 usb_pause_mtx(sc->sc_mtx, hz / 10); 593 } 594 } 595} 596 597static int 598ucom_open(struct tty *tp) 599{ 600 struct ucom_softc *sc = tty_softc(tp); 601 int error; 602 603 mtx_assert(sc->sc_mtx, MA_OWNED); 604 605 if (sc->sc_flag & UCOM_FLAG_GONE) { 606 return (ENXIO); 607 } 608 if (sc->sc_flag & UCOM_FLAG_HL_READY) { 609 /* already opened */ 610 return (0); 611 } 612 DPRINTF("tp = %p\n", tp); 613 614 if (sc->sc_callback->ucom_pre_open) { 615 /* 616 * give the lower layer a chance to disallow TTY open, for 617 * example if the device is not present: 618 */ 619 error = (sc->sc_callback->ucom_pre_open) (sc); 620 if (error) { 621 return (error); 622 } 623 } 624 sc->sc_flag |= UCOM_FLAG_HL_READY; 625 626 /* Disable transfers */ 627 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 628 629 sc->sc_lsr = 0; 630 sc->sc_msr = 0; 631 sc->sc_mcr = 0; 632 633 /* reset programmed line state */ 634 sc->sc_pls_curr = 0; 635 sc->sc_pls_set = 0; 636 sc->sc_pls_clr = 0; 637 638 ucom_queue_command(sc, ucom_cfg_open, NULL, 639 &sc->sc_open_task[0].hdr, 640 &sc->sc_open_task[1].hdr); 641 642 /* Queue transfer enable command last */ 643 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 644 &sc->sc_start_task[0].hdr, 645 &sc->sc_start_task[1].hdr); 646 647 ucom_modem(tp, SER_DTR | SER_RTS, 0); 648 649 ucom_ring(sc, 0); 650 651 ucom_break(sc, 0); 652 653 ucom_status_change(sc); 654 655 return (0); 656} 657 658static void 659ucom_cfg_close(struct usb_proc_msg *_task) 660{ 661 struct ucom_cfg_task *task = 662 (struct ucom_cfg_task *)_task; 663 struct ucom_softc *sc = task->sc; 664 665 DPRINTF("\n"); 666 667 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 668 sc->sc_flag &= ~UCOM_FLAG_LL_READY; 669 if (sc->sc_callback->ucom_cfg_close) 670 (sc->sc_callback->ucom_cfg_close) (sc); 671 } else { 672 /* already closed */ 673 } 674} 675 676static void 677ucom_close(struct tty *tp) 678{ 679 struct ucom_softc *sc = tty_softc(tp); 680 681 mtx_assert(sc->sc_mtx, MA_OWNED); 682 683 DPRINTF("tp=%p\n", tp); 684 685 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 686 DPRINTF("tp=%p already closed\n", tp); 687 return; 688 } 689 ucom_shutdown(sc); 690 691 ucom_queue_command(sc, ucom_cfg_close, NULL, 692 &sc->sc_close_task[0].hdr, 693 &sc->sc_close_task[1].hdr); 694 695 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW); 696 697 if (sc->sc_callback->ucom_stop_read) { 698 (sc->sc_callback->ucom_stop_read) (sc); 699 } 700} 701 702static int 703ucom_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 704{ 705 struct ucom_softc *sc = tty_softc(tp); 706 int error; 707 708 mtx_assert(sc->sc_mtx, MA_OWNED); 709 710 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 711 return (EIO); 712 } 713 DPRINTF("cmd = 0x%08lx\n", cmd); 714 715 switch (cmd) { 716#if 0 717 case TIOCSRING: 718 ucom_ring(sc, 1); 719 error = 0; 720 break; 721 case TIOCCRING: 722 ucom_ring(sc, 0); 723 error = 0; 724 break; 725#endif 726 case TIOCSBRK: 727 ucom_break(sc, 1); 728 error = 0; 729 break; 730 case TIOCCBRK: 731 ucom_break(sc, 0); 732 error = 0; 733 break; 734 default: 735 if (sc->sc_callback->ucom_ioctl) { 736 error = (sc->sc_callback->ucom_ioctl) 737 (sc, cmd, data, 0, td); 738 } else { 739 error = ENOIOCTL; 740 } 741 break; 742 } 743 return (error); 744} 745 746static int 747ucom_modem(struct tty *tp, int sigon, int sigoff) 748{ 749 struct ucom_softc *sc = tty_softc(tp); 750 uint8_t onoff; 751 752 mtx_assert(sc->sc_mtx, MA_OWNED); 753 754 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 755 return (0); 756 } 757 if ((sigon == 0) && (sigoff == 0)) { 758 759 if (sc->sc_mcr & SER_DTR) { 760 sigon |= SER_DTR; 761 } 762 if (sc->sc_mcr & SER_RTS) { 763 sigon |= SER_RTS; 764 } 765 if (sc->sc_msr & SER_CTS) { 766 sigon |= SER_CTS; 767 } 768 if (sc->sc_msr & SER_DCD) { 769 sigon |= SER_DCD; 770 } 771 if (sc->sc_msr & SER_DSR) { 772 sigon |= SER_DSR; 773 } 774 if (sc->sc_msr & SER_RI) { 775 sigon |= SER_RI; 776 } 777 return (sigon); 778 } 779 if (sigon & SER_DTR) { 780 sc->sc_mcr |= SER_DTR; 781 } 782 if (sigoff & SER_DTR) { 783 sc->sc_mcr &= ~SER_DTR; 784 } 785 if (sigon & SER_RTS) { 786 sc->sc_mcr |= SER_RTS; 787 } 788 if (sigoff & SER_RTS) { 789 sc->sc_mcr &= ~SER_RTS; 790 } 791 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0; 792 ucom_dtr(sc, onoff); 793 794 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0; 795 ucom_rts(sc, onoff); 796 797 return (0); 798} 799 800static void 801ucom_cfg_line_state(struct usb_proc_msg *_task) 802{ 803 struct ucom_cfg_task *task = 804 (struct ucom_cfg_task *)_task; 805 struct ucom_softc *sc = task->sc; 806 uint8_t notch_bits; 807 uint8_t any_bits; 808 uint8_t prev_value; 809 uint8_t last_value; 810 uint8_t mask; 811 812 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 813 return; 814 } 815 816 mask = 0; 817 /* compute callback mask */ 818 if (sc->sc_callback->ucom_cfg_set_dtr) 819 mask |= UCOM_LS_DTR; 820 if (sc->sc_callback->ucom_cfg_set_rts) 821 mask |= UCOM_LS_RTS; 822 if (sc->sc_callback->ucom_cfg_set_break) 823 mask |= UCOM_LS_BREAK; 824 if (sc->sc_callback->ucom_cfg_set_ring) 825 mask |= UCOM_LS_RING; 826 827 /* compute the bits we are to program */ 828 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask; 829 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask; 830 prev_value = sc->sc_pls_curr ^ notch_bits; 831 last_value = sc->sc_pls_curr; 832 833 /* reset programmed line state */ 834 sc->sc_pls_curr = 0; 835 sc->sc_pls_set = 0; 836 sc->sc_pls_clr = 0; 837 838 /* ensure that we don't loose any levels */ 839 if (notch_bits & UCOM_LS_DTR) 840 sc->sc_callback->ucom_cfg_set_dtr(sc, 841 (prev_value & UCOM_LS_DTR) ? 1 : 0); 842 if (notch_bits & UCOM_LS_RTS) 843 sc->sc_callback->ucom_cfg_set_rts(sc, 844 (prev_value & UCOM_LS_RTS) ? 1 : 0); 845 if (notch_bits & UCOM_LS_BREAK) 846 sc->sc_callback->ucom_cfg_set_break(sc, 847 (prev_value & UCOM_LS_BREAK) ? 1 : 0); 848 if (notch_bits & UCOM_LS_RING) 849 sc->sc_callback->ucom_cfg_set_ring(sc, 850 (prev_value & UCOM_LS_RING) ? 1 : 0); 851 852 /* set last value */ 853 if (any_bits & UCOM_LS_DTR) 854 sc->sc_callback->ucom_cfg_set_dtr(sc, 855 (last_value & UCOM_LS_DTR) ? 1 : 0); 856 if (any_bits & UCOM_LS_RTS) 857 sc->sc_callback->ucom_cfg_set_rts(sc, 858 (last_value & UCOM_LS_RTS) ? 1 : 0); 859 if (any_bits & UCOM_LS_BREAK) 860 sc->sc_callback->ucom_cfg_set_break(sc, 861 (last_value & UCOM_LS_BREAK) ? 1 : 0); 862 if (any_bits & UCOM_LS_RING) 863 sc->sc_callback->ucom_cfg_set_ring(sc, 864 (last_value & UCOM_LS_RING) ? 1 : 0); 865} 866 867static void 868ucom_line_state(struct ucom_softc *sc, 869 uint8_t set_bits, uint8_t clear_bits) 870{ 871 mtx_assert(sc->sc_mtx, MA_OWNED); 872 873 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 874 return; 875 } 876 877 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits); 878 879 /* update current programmed line state */ 880 sc->sc_pls_curr |= set_bits; 881 sc->sc_pls_curr &= ~clear_bits; 882 sc->sc_pls_set |= set_bits; 883 sc->sc_pls_clr |= clear_bits; 884 885 /* defer driver programming */ 886 ucom_queue_command(sc, ucom_cfg_line_state, NULL, 887 &sc->sc_line_state_task[0].hdr, 888 &sc->sc_line_state_task[1].hdr); 889} 890 891static void 892ucom_ring(struct ucom_softc *sc, uint8_t onoff) 893{ 894 DPRINTF("onoff = %d\n", onoff); 895 896 if (onoff) 897 ucom_line_state(sc, UCOM_LS_RING, 0); 898 else 899 ucom_line_state(sc, 0, UCOM_LS_RING); 900} 901 902static void 903ucom_break(struct ucom_softc *sc, uint8_t onoff) 904{ 905 DPRINTF("onoff = %d\n", onoff); 906 907 if (onoff) 908 ucom_line_state(sc, UCOM_LS_BREAK, 0); 909 else 910 ucom_line_state(sc, 0, UCOM_LS_BREAK); 911} 912 913static void 914ucom_dtr(struct ucom_softc *sc, uint8_t onoff) 915{ 916 DPRINTF("onoff = %d\n", onoff); 917 918 if (onoff) 919 ucom_line_state(sc, UCOM_LS_DTR, 0); 920 else 921 ucom_line_state(sc, 0, UCOM_LS_DTR); 922} 923 924static void 925ucom_rts(struct ucom_softc *sc, uint8_t onoff) 926{ 927 DPRINTF("onoff = %d\n", onoff); 928 929 if (onoff) 930 ucom_line_state(sc, UCOM_LS_RTS, 0); 931 else 932 ucom_line_state(sc, 0, UCOM_LS_RTS); 933} 934 935static void 936ucom_cfg_status_change(struct usb_proc_msg *_task) 937{ 938 struct ucom_cfg_task *task = 939 (struct ucom_cfg_task *)_task; 940 struct ucom_softc *sc = task->sc; 941 struct tty *tp; 942 uint8_t new_msr; 943 uint8_t new_lsr; 944 uint8_t onoff; 945 946 tp = sc->sc_tty; 947 948 mtx_assert(sc->sc_mtx, MA_OWNED); 949 950 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 951 return; 952 } 953 if (sc->sc_callback->ucom_cfg_get_status == NULL) { 954 return; 955 } 956 /* get status */ 957 958 new_msr = 0; 959 new_lsr = 0; 960 961 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr); 962 963 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 964 /* TTY device closed */ 965 return; 966 } 967 onoff = ((sc->sc_msr ^ new_msr) & SER_DCD); 968 969 sc->sc_msr = new_msr; 970 sc->sc_lsr = new_lsr; 971 972 if (onoff) { 973 974 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0; 975 976 DPRINTF("DCD changed to %d\n", onoff); 977 978 ttydisc_modem(tp, onoff); 979 } 980} 981 982void 983ucom_status_change(struct ucom_softc *sc) 984{ 985 mtx_assert(sc->sc_mtx, MA_OWNED); 986 987 if (sc->sc_flag & UCOM_FLAG_CONSOLE) 988 return; /* not supported */ 989 990 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 991 return; 992 } 993 DPRINTF("\n"); 994 995 ucom_queue_command(sc, ucom_cfg_status_change, NULL, 996 &sc->sc_status_task[0].hdr, 997 &sc->sc_status_task[1].hdr); 998} 999 1000static void 1001ucom_cfg_param(struct usb_proc_msg *_task) 1002{ 1003 struct ucom_param_task *task = 1004 (struct ucom_param_task *)_task; 1005 struct ucom_softc *sc = task->sc; 1006 1007 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 1008 return; 1009 } 1010 if (sc->sc_callback->ucom_cfg_param == NULL) { 1011 return; 1012 } 1013 1014 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy); 1015 1016 /* wait a little */ 1017 usb_pause_mtx(sc->sc_mtx, hz / 10); 1018} 1019 1020static int 1021ucom_param(struct tty *tp, struct termios *t) 1022{ 1023 struct ucom_softc *sc = tty_softc(tp); 1024 uint8_t opened; 1025 int error; 1026 1027 mtx_assert(sc->sc_mtx, MA_OWNED); 1028 1029 opened = 0; 1030 error = 0; 1031 1032 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1033 1034 /* XXX the TTY layer should call "open()" first! */ 1035 1036 error = ucom_open(tp); 1037 if (error) { 1038 goto done; 1039 } 1040 opened = 1; 1041 } 1042 DPRINTF("sc = %p\n", sc); 1043 1044 /* Check requested parameters. */ 1045 if (t->c_ospeed < 0) { 1046 DPRINTF("negative ospeed\n"); 1047 error = EINVAL; 1048 goto done; 1049 } 1050 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) { 1051 DPRINTF("mismatch ispeed and ospeed\n"); 1052 error = EINVAL; 1053 goto done; 1054 } 1055 t->c_ispeed = t->c_ospeed; 1056 1057 if (sc->sc_callback->ucom_pre_param) { 1058 /* Let the lower layer verify the parameters */ 1059 error = (sc->sc_callback->ucom_pre_param) (sc, t); 1060 if (error) { 1061 DPRINTF("callback error = %d\n", error); 1062 goto done; 1063 } 1064 } 1065 1066 /* Disable transfers */ 1067 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 1068 1069 /* Queue baud rate programming command first */ 1070 ucom_queue_command(sc, ucom_cfg_param, t, 1071 &sc->sc_param_task[0].hdr, 1072 &sc->sc_param_task[1].hdr); 1073 1074 /* Queue transfer enable command last */ 1075 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 1076 &sc->sc_start_task[0].hdr, 1077 &sc->sc_start_task[1].hdr); 1078 1079 if (t->c_cflag & CRTS_IFLOW) { 1080 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW; 1081 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) { 1082 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW; 1083 ucom_modem(tp, SER_RTS, 0); 1084 } 1085done: 1086 if (error) { 1087 if (opened) { 1088 ucom_close(tp); 1089 } 1090 } 1091 return (error); 1092} 1093 1094static void 1095ucom_outwakeup(struct tty *tp) 1096{ 1097 struct ucom_softc *sc = tty_softc(tp); 1098 1099 mtx_assert(sc->sc_mtx, MA_OWNED); 1100 1101 DPRINTF("sc = %p\n", sc); 1102 1103 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1104 /* The higher layer is not ready */ 1105 return; 1106 } 1107 ucom_start_transfers(sc); 1108} 1109 1110/*------------------------------------------------------------------------* 1111 * ucom_get_data 1112 * 1113 * Return values: 1114 * 0: No data is available. 1115 * Else: Data is available. 1116 *------------------------------------------------------------------------*/ 1117uint8_t 1118ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1119 uint32_t offset, uint32_t len, uint32_t *actlen) 1120{ 1121 struct usb_page_search res; 1122 struct tty *tp = sc->sc_tty; 1123 uint32_t cnt; 1124 uint32_t offset_orig; 1125 1126 mtx_assert(sc->sc_mtx, MA_OWNED); 1127 1128 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1129 unsigned int temp; 1130 1131 /* get total TX length */ 1132 1133 temp = ucom_cons_tx_high - ucom_cons_tx_low; 1134 temp %= UCOM_CONS_BUFSIZE; 1135 1136 /* limit TX length */ 1137 1138 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low)) 1139 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low); 1140 1141 if (temp > len) 1142 temp = len; 1143 1144 /* copy in data */ 1145 1146 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp); 1147 1148 /* update counters */ 1149 1150 ucom_cons_tx_low += temp; 1151 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE; 1152 1153 /* store actual length */ 1154 1155 *actlen = temp; 1156 1157 return (temp ? 1 : 0); 1158 } 1159 1160 if (tty_gone(tp) || 1161 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) { 1162 actlen[0] = 0; 1163 return (0); /* multiport device polling */ 1164 } 1165 offset_orig = offset; 1166 1167 while (len != 0) { 1168 1169 usbd_get_page(pc, offset, &res); 1170 1171 if (res.length > len) { 1172 res.length = len; 1173 } 1174 /* copy data directly into USB buffer */ 1175 cnt = ttydisc_getc(tp, res.buffer, res.length); 1176 1177 offset += cnt; 1178 len -= cnt; 1179 1180 if (cnt < res.length) { 1181 /* end of buffer */ 1182 break; 1183 } 1184 } 1185 1186 actlen[0] = offset - offset_orig; 1187 1188 DPRINTF("cnt=%d\n", actlen[0]); 1189 1190 if (actlen[0] == 0) { 1191 return (0); 1192 } 1193 return (1); 1194} 1195 1196void 1197ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1198 uint32_t offset, uint32_t len) 1199{ 1200 struct usb_page_search res; 1201 struct tty *tp = sc->sc_tty; 1202 char *buf; 1203 uint32_t cnt; 1204 1205 mtx_assert(sc->sc_mtx, MA_OWNED); 1206 1207 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1208 unsigned int temp; 1209 1210 /* get maximum RX length */ 1211 1212 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low; 1213 temp %= UCOM_CONS_BUFSIZE; 1214 1215 /* limit RX length */ 1216 1217 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high)) 1218 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high); 1219 1220 if (temp > len) 1221 temp = len; 1222 1223 /* copy out data */ 1224 1225 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp); 1226 1227 /* update counters */ 1228 1229 ucom_cons_rx_high += temp; 1230 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE; 1231 1232 return; 1233 } 1234 1235 if (tty_gone(tp)) 1236 return; /* multiport device polling */ 1237 1238 if (len == 0) 1239 return; /* no data */ 1240 1241 /* set a flag to prevent recursation ? */ 1242 1243 while (len > 0) { 1244 1245 usbd_get_page(pc, offset, &res); 1246 1247 if (res.length > len) { 1248 res.length = len; 1249 } 1250 len -= res.length; 1251 offset += res.length; 1252 1253 /* pass characters to tty layer */ 1254 1255 buf = res.buffer; 1256 cnt = res.length; 1257 1258 /* first check if we can pass the buffer directly */ 1259 1260 if (ttydisc_can_bypass(tp)) { 1261 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) { 1262 DPRINTF("tp=%p, data lost\n", tp); 1263 } 1264 continue; 1265 } 1266 /* need to loop */ 1267 1268 for (cnt = 0; cnt != res.length; cnt++) { 1269 if (ttydisc_rint(tp, buf[cnt], 0) == -1) { 1270 /* XXX what should we do? */ 1271 1272 DPRINTF("tp=%p, lost %d " 1273 "chars\n", tp, res.length - cnt); 1274 break; 1275 } 1276 } 1277 } 1278 ttydisc_rint_done(tp); 1279} 1280 1281static void 1282ucom_free(void *xsc) 1283{ 1284 struct ucom_softc *sc = xsc; 1285 1286 mtx_lock(sc->sc_mtx); 1287 sc->sc_ttyfreed = 1; 1288 cv_signal(&sc->sc_cv); 1289 mtx_unlock(sc->sc_mtx); 1290} 1291 1292static cn_probe_t ucom_cnprobe; 1293static cn_init_t ucom_cninit; 1294static cn_term_t ucom_cnterm; 1295static cn_getc_t ucom_cngetc; 1296static cn_putc_t ucom_cnputc; 1297 1298CONSOLE_DRIVER(ucom); 1299 1300static void 1301ucom_cnprobe(struct consdev *cp) 1302{ 1303 if (ucom_cons_unit != -1) 1304 cp->cn_pri = CN_NORMAL; 1305 else 1306 cp->cn_pri = CN_DEAD; 1307 1308 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name)); 1309} 1310 1311static void 1312ucom_cninit(struct consdev *cp) 1313{ 1314} 1315 1316static void 1317ucom_cnterm(struct consdev *cp) 1318{ 1319} 1320 1321static int 1322ucom_cngetc(struct consdev *cd) 1323{ 1324 struct ucom_softc *sc = ucom_cons_softc; 1325 int c; 1326 1327 if (sc == NULL) 1328 return (-1); 1329 1330 mtx_lock(sc->sc_mtx); 1331 1332 if (ucom_cons_rx_low != ucom_cons_rx_high) { 1333 c = ucom_cons_rx_buf[ucom_cons_rx_low]; 1334 ucom_cons_rx_low ++; 1335 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE; 1336 } else { 1337 c = -1; 1338 } 1339 1340 /* start USB transfers */ 1341 ucom_outwakeup(sc->sc_tty); 1342 1343 mtx_unlock(sc->sc_mtx); 1344 1345 /* poll if necessary */ 1346 if (kdb_active && sc->sc_callback->ucom_poll) 1347 (sc->sc_callback->ucom_poll) (sc); 1348 1349 return (c); 1350} 1351 1352static void 1353ucom_cnputc(struct consdev *cd, int c) 1354{ 1355 struct ucom_softc *sc = ucom_cons_softc; 1356 unsigned int temp; 1357 1358 if (sc == NULL) 1359 return; 1360 1361 repeat: 1362 1363 mtx_lock(sc->sc_mtx); 1364 1365 /* compute maximum TX length */ 1366 1367 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low; 1368 temp %= UCOM_CONS_BUFSIZE; 1369 1370 if (temp) { 1371 ucom_cons_tx_buf[ucom_cons_tx_high] = c; 1372 ucom_cons_tx_high ++; 1373 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE; 1374 } 1375 1376 /* start USB transfers */ 1377 ucom_outwakeup(sc->sc_tty); 1378 1379 mtx_unlock(sc->sc_mtx); 1380 1381 /* poll if necessary */ 1382 if (kdb_active && sc->sc_callback->ucom_poll) { 1383 (sc->sc_callback->ucom_poll) (sc); 1384 /* simple flow control */ 1385 if (temp == 0) 1386 goto repeat; 1387 } 1388} 1389 1390#if defined(GDB) 1391 1392#include <gdb/gdb.h> 1393 1394static gdb_probe_f ucom_gdbprobe; 1395static gdb_init_f ucom_gdbinit; 1396static gdb_term_f ucom_gdbterm; 1397static gdb_getc_f ucom_gdbgetc; 1398static gdb_putc_f ucom_gdbputc; 1399 1400GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc); 1401 1402static int 1403ucom_gdbprobe(void) 1404{ 1405 return ((ucom_cons_softc != NULL) ? 0 : -1); 1406} 1407 1408static void 1409ucom_gdbinit(void) 1410{ 1411} 1412 1413static void 1414ucom_gdbterm(void) 1415{ 1416} 1417 1418static void 1419ucom_gdbputc(int c) 1420{ 1421 ucom_cnputc(NULL, c); 1422} 1423 1424static int 1425ucom_gdbgetc(void) 1426{ 1427 return (ucom_cngetc(NULL)); 1428} 1429 1430#endif 1431