usb_serial.c revision 217265
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 217265 2011-01-11 13:59:06Z jhb $"); 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/module.h> 79#include <sys/lock.h> 80#include <sys/mutex.h> 81#include <sys/condvar.h> 82#include <sys/sysctl.h> 83#include <sys/sx.h> 84#include <sys/unistd.h> 85#include <sys/callout.h> 86#include <sys/malloc.h> 87#include <sys/priv.h> 88#include <sys/cons.h> 89#include <sys/kdb.h> 90 91#include <dev/usb/usb.h> 92#include <dev/usb/usbdi.h> 93#include <dev/usb/usbdi_util.h> 94 95#define USB_DEBUG_VAR ucom_debug 96#include <dev/usb/usb_debug.h> 97#include <dev/usb/usb_busdma.h> 98#include <dev/usb/usb_process.h> 99 100#include <dev/usb/serial/usb_serial.h> 101 102#include "opt_gdb.h" 103 104SYSCTL_NODE(_hw_usb, OID_AUTO, ucom, CTLFLAG_RW, 0, "USB ucom"); 105 106#ifdef USB_DEBUG 107static int ucom_debug = 0; 108 109SYSCTL_INT(_hw_usb_ucom, OID_AUTO, debug, CTLFLAG_RW, 110 &ucom_debug, 0, "ucom debug level"); 111#endif 112 113#define UCOM_CONS_BUFSIZE 1024 114 115static uint8_t ucom_cons_rx_buf[UCOM_CONS_BUFSIZE]; 116static uint8_t ucom_cons_tx_buf[UCOM_CONS_BUFSIZE]; 117 118static unsigned int ucom_cons_rx_low = 0; 119static unsigned int ucom_cons_rx_high = 0; 120 121static unsigned int ucom_cons_tx_low = 0; 122static unsigned int ucom_cons_tx_high = 0; 123 124static int ucom_cons_unit = -1; 125static int ucom_cons_subunit = 0; 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"); 132TUNABLE_INT("hw.usb.ucom.cons_subunit", &ucom_cons_subunit); 133SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_subunit, CTLFLAG_RW, 134 &ucom_cons_subunit, 0, "console subunit number"); 135TUNABLE_INT("hw.usb.ucom.cons_baud", &ucom_cons_baud); 136SYSCTL_INT(_hw_usb_ucom, OID_AUTO, cons_baud, CTLFLAG_RW, 137 &ucom_cons_baud, 0, "console baud rate"); 138 139static usb_proc_callback_t ucom_cfg_start_transfers; 140static usb_proc_callback_t ucom_cfg_open; 141static usb_proc_callback_t ucom_cfg_close; 142static usb_proc_callback_t ucom_cfg_line_state; 143static usb_proc_callback_t ucom_cfg_status_change; 144static usb_proc_callback_t ucom_cfg_param; 145 146static int ucom_unit_alloc(void); 147static void ucom_unit_free(int); 148static int ucom_attach_tty(struct ucom_super_softc *, struct ucom_softc *); 149static void ucom_detach_tty(struct ucom_softc *); 150static void ucom_queue_command(struct ucom_softc *, 151 usb_proc_callback_t *, struct termios *pt, 152 struct usb_proc_msg *t0, struct usb_proc_msg *t1); 153static void ucom_shutdown(struct ucom_softc *); 154static void ucom_ring(struct ucom_softc *, uint8_t); 155static void ucom_break(struct ucom_softc *, uint8_t); 156static void ucom_dtr(struct ucom_softc *, uint8_t); 157static void ucom_rts(struct ucom_softc *, uint8_t); 158 159static tsw_open_t ucom_open; 160static tsw_close_t ucom_close; 161static tsw_ioctl_t ucom_ioctl; 162static tsw_modem_t ucom_modem; 163static tsw_param_t ucom_param; 164static tsw_outwakeup_t ucom_outwakeup; 165static tsw_free_t ucom_free; 166 167static struct ttydevsw ucom_class = { 168 .tsw_flags = TF_INITLOCK | TF_CALLOUT, 169 .tsw_open = ucom_open, 170 .tsw_close = ucom_close, 171 .tsw_outwakeup = ucom_outwakeup, 172 .tsw_ioctl = ucom_ioctl, 173 .tsw_param = ucom_param, 174 .tsw_modem = ucom_modem, 175 .tsw_free = ucom_free, 176}; 177 178MODULE_DEPEND(ucom, usb, 1, 1, 1); 179MODULE_VERSION(ucom, 1); 180 181#define UCOM_UNIT_MAX 128 /* limits size of ucom_bitmap */ 182 183static uint8_t ucom_bitmap[(UCOM_UNIT_MAX + 7) / 8]; 184static struct mtx ucom_bitmap_mtx; 185MTX_SYSINIT(ucom_bitmap_mtx, &ucom_bitmap_mtx, "ucom bitmap", MTX_DEF); 186 187#define UCOM_TTY_PREFIX "U" 188 189/* 190 * Mark a unit number (the X in cuaUX) as in use. 191 * 192 * Note that devices using a different naming scheme (see ucom_tty_name() 193 * callback) still use this unit allocation. 194 */ 195static int 196ucom_unit_alloc(void) 197{ 198 int unit; 199 200 mtx_lock(&ucom_bitmap_mtx); 201 202 for (unit = 0; unit < UCOM_UNIT_MAX; unit++) { 203 if ((ucom_bitmap[unit / 8] & (1 << (unit % 8))) == 0) { 204 ucom_bitmap[unit / 8] |= (1 << (unit % 8)); 205 break; 206 } 207 } 208 209 mtx_unlock(&ucom_bitmap_mtx); 210 211 if (unit == UCOM_UNIT_MAX) 212 return -1; 213 else 214 return unit; 215} 216 217/* 218 * Mark the unit number as not in use. 219 */ 220static void 221ucom_unit_free(int unit) 222{ 223 mtx_lock(&ucom_bitmap_mtx); 224 225 ucom_bitmap[unit / 8] &= ~(1 << (unit % 8)); 226 227 mtx_unlock(&ucom_bitmap_mtx); 228} 229 230/* 231 * Setup a group of one or more serial ports. 232 * 233 * The mutex pointed to by "mtx" is applied before all 234 * callbacks are called back. Also "mtx" must be applied 235 * before calling into the ucom-layer! 236 */ 237int 238ucom_attach(struct ucom_super_softc *ssc, struct ucom_softc *sc, 239 uint32_t subunits, void *parent, 240 const struct ucom_callback *callback, struct mtx *mtx) 241{ 242 uint32_t subunit; 243 int error = 0; 244 245 if ((sc == NULL) || 246 (subunits == 0) || 247 (callback == NULL)) { 248 return (EINVAL); 249 } 250 251 ssc->sc_unit = ucom_unit_alloc(); 252 if (ssc->sc_unit == -1) 253 return (ENOMEM); 254 255 error = usb_proc_create(&ssc->sc_tq, mtx, "ucom", USB_PRI_MED); 256 if (error) { 257 ucom_unit_free(ssc->sc_unit); 258 return (error); 259 } 260 ssc->sc_subunits = subunits; 261 262 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) { 263 sc[subunit].sc_subunit = subunit; 264 sc[subunit].sc_super = ssc; 265 sc[subunit].sc_mtx = mtx; 266 sc[subunit].sc_parent = parent; 267 sc[subunit].sc_callback = callback; 268 269 error = ucom_attach_tty(ssc, &sc[subunit]); 270 if (error) { 271 ucom_detach(ssc, &sc[0]); 272 return (error); 273 } 274 sc[subunit].sc_flag |= UCOM_FLAG_ATTACHED; 275 } 276 277 DPRINTF("tp = %p, unit = %d, subunits = %d\n", 278 sc->sc_tty, ssc->sc_unit, ssc->sc_subunits); 279 280 return (0); 281} 282 283/* 284 * NOTE: the following function will do nothing if 285 * the structure pointed to by "ssc" and "sc" is zero. 286 */ 287void 288ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc) 289{ 290 uint32_t subunit; 291 292 usb_proc_drain(&ssc->sc_tq); 293 294 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) { 295 if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) { 296 297 ucom_detach_tty(&sc[subunit]); 298 299 /* avoid duplicate detach */ 300 sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED; 301 } 302 } 303 ucom_unit_free(ssc->sc_unit); 304 usb_proc_free(&ssc->sc_tq); 305} 306 307static int 308ucom_attach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc) 309{ 310 struct tty *tp; 311 char buf[32]; /* temporary TTY device name buffer */ 312 313 tp = tty_alloc_mutex(&ucom_class, sc, sc->sc_mtx); 314 if (tp == NULL) 315 return (ENOMEM); 316 317 /* Check if the client has a custom TTY name */ 318 buf[0] = '\0'; 319 if (sc->sc_callback->ucom_tty_name) { 320 sc->sc_callback->ucom_tty_name(sc, buf, 321 sizeof(buf), ssc->sc_unit, sc->sc_subunit); 322 } 323 if (buf[0] == 0) { 324 /* Use default TTY name */ 325 if (ssc->sc_subunits > 1) { 326 /* multiple modems in one */ 327 snprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u.%u", 328 ssc->sc_unit, sc->sc_subunit); 329 } else { 330 /* single modem */ 331 snprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u", 332 ssc->sc_unit); 333 } 334 } 335 tty_makedev(tp, NULL, "%s", buf); 336 337 sc->sc_tty = tp; 338 339 DPRINTF("ttycreate: %s\n", buf); 340 cv_init(&sc->sc_cv, "ucom"); 341 342 /* Check if this device should be a console */ 343 if ((ucom_cons_softc == NULL) && 344 (ssc->sc_unit == ucom_cons_unit) && 345 (sc->sc_subunit == ucom_cons_subunit)) { 346 struct termios t; 347 348 DPRINTF("unit %d subunit %d is console", ssc->sc_unit, sc->sc_subunit); 349 350 ucom_cons_softc = sc; 351 352 memset(&t, 0, sizeof(t)); 353 t.c_ispeed = ucom_cons_baud; 354 t.c_ospeed = t.c_ispeed; 355 t.c_cflag = CS8; 356 357 mtx_lock(ucom_cons_softc->sc_mtx); 358 ucom_cons_rx_low = 0; 359 ucom_cons_rx_high = 0; 360 ucom_cons_tx_low = 0; 361 ucom_cons_tx_high = 0; 362 sc->sc_flag |= UCOM_FLAG_CONSOLE; 363 ucom_open(ucom_cons_softc->sc_tty); 364 ucom_param(ucom_cons_softc->sc_tty, &t); 365 mtx_unlock(ucom_cons_softc->sc_mtx); 366 } 367 368 return (0); 369} 370 371static void 372ucom_detach_tty(struct ucom_softc *sc) 373{ 374 struct tty *tp = sc->sc_tty; 375 376 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty); 377 378 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 379 mtx_lock(ucom_cons_softc->sc_mtx); 380 ucom_close(ucom_cons_softc->sc_tty); 381 sc->sc_flag &= ~UCOM_FLAG_CONSOLE; 382 mtx_unlock(ucom_cons_softc->sc_mtx); 383 ucom_cons_softc = NULL; 384 } 385 386 /* the config thread has been stopped when we get here */ 387 388 mtx_lock(sc->sc_mtx); 389 sc->sc_flag |= UCOM_FLAG_GONE; 390 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY); 391 mtx_unlock(sc->sc_mtx); 392 if (tp) { 393 tty_lock(tp); 394 395 ucom_close(tp); /* close, if any */ 396 397 tty_rel_gone(tp); 398 399 mtx_lock(sc->sc_mtx); 400 /* Wait for the callback after the TTY is torn down */ 401 while (sc->sc_ttyfreed == 0) 402 cv_wait(&sc->sc_cv, sc->sc_mtx); 403 /* 404 * make sure that read and write transfers are stopped 405 */ 406 if (sc->sc_callback->ucom_stop_read) { 407 (sc->sc_callback->ucom_stop_read) (sc); 408 } 409 if (sc->sc_callback->ucom_stop_write) { 410 (sc->sc_callback->ucom_stop_write) (sc); 411 } 412 mtx_unlock(sc->sc_mtx); 413 } 414 cv_destroy(&sc->sc_cv); 415} 416 417void 418ucom_set_pnpinfo_usb(struct ucom_super_softc *ssc, device_t dev) 419{ 420 char buf[64]; 421 uint8_t iface_index; 422 struct usb_attach_arg *uaa; 423 424 snprintf(buf, sizeof(buf), "ttyname=%s%d ttyports=%d", 425 UCOM_TTY_PREFIX, ssc->sc_unit, ssc->sc_subunits); 426 427 /* Store the PNP info in the first interface for the dev */ 428 uaa = device_get_ivars(dev); 429 iface_index = uaa->info.bIfaceIndex; 430 431 if (usbd_set_pnpinfo(uaa->device, iface_index, buf) != 0) 432 device_printf(dev, "Could not set PNP info\n"); 433} 434 435static void 436ucom_queue_command(struct ucom_softc *sc, 437 usb_proc_callback_t *fn, struct termios *pt, 438 struct usb_proc_msg *t0, struct usb_proc_msg *t1) 439{ 440 struct ucom_super_softc *ssc = sc->sc_super; 441 struct ucom_param_task *task; 442 443 mtx_assert(sc->sc_mtx, MA_OWNED); 444 445 if (usb_proc_is_gone(&ssc->sc_tq)) { 446 DPRINTF("proc is gone\n"); 447 return; /* nothing to do */ 448 } 449 /* 450 * NOTE: The task cannot get executed before we drop the 451 * "sc_mtx" mutex. It is safe to update fields in the message 452 * structure after that the message got queued. 453 */ 454 task = (struct ucom_param_task *) 455 usb_proc_msignal(&ssc->sc_tq, t0, t1); 456 457 /* Setup callback and softc pointers */ 458 task->hdr.pm_callback = fn; 459 task->sc = sc; 460 461 /* 462 * Make a copy of the termios. This field is only present if 463 * the "pt" field is not NULL. 464 */ 465 if (pt != NULL) 466 task->termios_copy = *pt; 467 468 /* 469 * Closing the device should be synchronous. 470 */ 471 if (fn == ucom_cfg_close) 472 usb_proc_mwait(&ssc->sc_tq, t0, t1); 473 474 /* 475 * In case of multiple configure requests, 476 * keep track of the last one! 477 */ 478 if (fn == ucom_cfg_start_transfers) 479 sc->sc_last_start_xfer = &task->hdr; 480} 481 482static void 483ucom_shutdown(struct ucom_softc *sc) 484{ 485 struct tty *tp = sc->sc_tty; 486 487 mtx_assert(sc->sc_mtx, MA_OWNED); 488 489 DPRINTF("\n"); 490 491 /* 492 * Hang up if necessary: 493 */ 494 if (tp->t_termios.c_cflag & HUPCL) { 495 ucom_modem(tp, 0, SER_DTR); 496 } 497} 498 499/* 500 * Return values: 501 * 0: normal 502 * else: taskqueue is draining or gone 503 */ 504uint8_t 505ucom_cfg_is_gone(struct ucom_softc *sc) 506{ 507 struct ucom_super_softc *ssc = sc->sc_super; 508 509 return (usb_proc_is_gone(&ssc->sc_tq)); 510} 511 512static void 513ucom_cfg_start_transfers(struct usb_proc_msg *_task) 514{ 515 struct ucom_cfg_task *task = 516 (struct ucom_cfg_task *)_task; 517 struct ucom_softc *sc = task->sc; 518 519 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 520 return; 521 } 522 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 523 /* TTY device closed */ 524 return; 525 } 526 527 if (_task == sc->sc_last_start_xfer) 528 sc->sc_flag |= UCOM_FLAG_GP_DATA; 529 530 if (sc->sc_callback->ucom_start_read) { 531 (sc->sc_callback->ucom_start_read) (sc); 532 } 533 if (sc->sc_callback->ucom_start_write) { 534 (sc->sc_callback->ucom_start_write) (sc); 535 } 536} 537 538static void 539ucom_start_transfers(struct ucom_softc *sc) 540{ 541 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 542 return; 543 } 544 /* 545 * Make sure that data transfers are started in both 546 * directions: 547 */ 548 if (sc->sc_callback->ucom_start_read) { 549 (sc->sc_callback->ucom_start_read) (sc); 550 } 551 if (sc->sc_callback->ucom_start_write) { 552 (sc->sc_callback->ucom_start_write) (sc); 553 } 554} 555 556static void 557ucom_cfg_open(struct usb_proc_msg *_task) 558{ 559 struct ucom_cfg_task *task = 560 (struct ucom_cfg_task *)_task; 561 struct ucom_softc *sc = task->sc; 562 563 DPRINTF("\n"); 564 565 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 566 567 /* already opened */ 568 569 } else { 570 571 sc->sc_flag |= UCOM_FLAG_LL_READY; 572 573 if (sc->sc_callback->ucom_cfg_open) { 574 (sc->sc_callback->ucom_cfg_open) (sc); 575 576 /* wait a little */ 577 usb_pause_mtx(sc->sc_mtx, hz / 10); 578 } 579 } 580} 581 582static int 583ucom_open(struct tty *tp) 584{ 585 struct ucom_softc *sc = tty_softc(tp); 586 int error; 587 588 mtx_assert(sc->sc_mtx, MA_OWNED); 589 590 if (sc->sc_flag & UCOM_FLAG_GONE) { 591 return (ENXIO); 592 } 593 if (sc->sc_flag & UCOM_FLAG_HL_READY) { 594 /* already opened */ 595 return (0); 596 } 597 DPRINTF("tp = %p\n", tp); 598 599 if (sc->sc_callback->ucom_pre_open) { 600 /* 601 * give the lower layer a chance to disallow TTY open, for 602 * example if the device is not present: 603 */ 604 error = (sc->sc_callback->ucom_pre_open) (sc); 605 if (error) { 606 return (error); 607 } 608 } 609 sc->sc_flag |= UCOM_FLAG_HL_READY; 610 611 /* Disable transfers */ 612 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 613 614 sc->sc_lsr = 0; 615 sc->sc_msr = 0; 616 sc->sc_mcr = 0; 617 618 /* reset programmed line state */ 619 sc->sc_pls_curr = 0; 620 sc->sc_pls_set = 0; 621 sc->sc_pls_clr = 0; 622 623 ucom_queue_command(sc, ucom_cfg_open, NULL, 624 &sc->sc_open_task[0].hdr, 625 &sc->sc_open_task[1].hdr); 626 627 /* Queue transfer enable command last */ 628 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 629 &sc->sc_start_task[0].hdr, 630 &sc->sc_start_task[1].hdr); 631 632 ucom_modem(tp, SER_DTR | SER_RTS, 0); 633 634 ucom_ring(sc, 0); 635 636 ucom_break(sc, 0); 637 638 ucom_status_change(sc); 639 640 return (0); 641} 642 643static void 644ucom_cfg_close(struct usb_proc_msg *_task) 645{ 646 struct ucom_cfg_task *task = 647 (struct ucom_cfg_task *)_task; 648 struct ucom_softc *sc = task->sc; 649 650 DPRINTF("\n"); 651 652 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 653 sc->sc_flag &= ~UCOM_FLAG_LL_READY; 654 if (sc->sc_callback->ucom_cfg_close) 655 (sc->sc_callback->ucom_cfg_close) (sc); 656 } else { 657 /* already closed */ 658 } 659} 660 661static void 662ucom_close(struct tty *tp) 663{ 664 struct ucom_softc *sc = tty_softc(tp); 665 666 mtx_assert(sc->sc_mtx, MA_OWNED); 667 668 DPRINTF("tp=%p\n", tp); 669 670 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 671 DPRINTF("tp=%p already closed\n", tp); 672 return; 673 } 674 ucom_shutdown(sc); 675 676 ucom_queue_command(sc, ucom_cfg_close, NULL, 677 &sc->sc_close_task[0].hdr, 678 &sc->sc_close_task[1].hdr); 679 680 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW); 681 682 if (sc->sc_callback->ucom_stop_read) { 683 (sc->sc_callback->ucom_stop_read) (sc); 684 } 685} 686 687static int 688ucom_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 689{ 690 struct ucom_softc *sc = tty_softc(tp); 691 int error; 692 693 mtx_assert(sc->sc_mtx, MA_OWNED); 694 695 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 696 return (EIO); 697 } 698 DPRINTF("cmd = 0x%08lx\n", cmd); 699 700 switch (cmd) { 701#if 0 702 case TIOCSRING: 703 ucom_ring(sc, 1); 704 error = 0; 705 break; 706 case TIOCCRING: 707 ucom_ring(sc, 0); 708 error = 0; 709 break; 710#endif 711 case TIOCSBRK: 712 ucom_break(sc, 1); 713 error = 0; 714 break; 715 case TIOCCBRK: 716 ucom_break(sc, 0); 717 error = 0; 718 break; 719 default: 720 if (sc->sc_callback->ucom_ioctl) { 721 error = (sc->sc_callback->ucom_ioctl) 722 (sc, cmd, data, 0, td); 723 } else { 724 error = ENOIOCTL; 725 } 726 break; 727 } 728 return (error); 729} 730 731static int 732ucom_modem(struct tty *tp, int sigon, int sigoff) 733{ 734 struct ucom_softc *sc = tty_softc(tp); 735 uint8_t onoff; 736 737 mtx_assert(sc->sc_mtx, MA_OWNED); 738 739 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 740 return (0); 741 } 742 if ((sigon == 0) && (sigoff == 0)) { 743 744 if (sc->sc_mcr & SER_DTR) { 745 sigon |= SER_DTR; 746 } 747 if (sc->sc_mcr & SER_RTS) { 748 sigon |= SER_RTS; 749 } 750 if (sc->sc_msr & SER_CTS) { 751 sigon |= SER_CTS; 752 } 753 if (sc->sc_msr & SER_DCD) { 754 sigon |= SER_DCD; 755 } 756 if (sc->sc_msr & SER_DSR) { 757 sigon |= SER_DSR; 758 } 759 if (sc->sc_msr & SER_RI) { 760 sigon |= SER_RI; 761 } 762 return (sigon); 763 } 764 if (sigon & SER_DTR) { 765 sc->sc_mcr |= SER_DTR; 766 } 767 if (sigoff & SER_DTR) { 768 sc->sc_mcr &= ~SER_DTR; 769 } 770 if (sigon & SER_RTS) { 771 sc->sc_mcr |= SER_RTS; 772 } 773 if (sigoff & SER_RTS) { 774 sc->sc_mcr &= ~SER_RTS; 775 } 776 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0; 777 ucom_dtr(sc, onoff); 778 779 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0; 780 ucom_rts(sc, onoff); 781 782 return (0); 783} 784 785static void 786ucom_cfg_line_state(struct usb_proc_msg *_task) 787{ 788 struct ucom_cfg_task *task = 789 (struct ucom_cfg_task *)_task; 790 struct ucom_softc *sc = task->sc; 791 uint8_t notch_bits; 792 uint8_t any_bits; 793 uint8_t prev_value; 794 uint8_t last_value; 795 uint8_t mask; 796 797 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 798 return; 799 } 800 801 mask = 0; 802 /* compute callback mask */ 803 if (sc->sc_callback->ucom_cfg_set_dtr) 804 mask |= UCOM_LS_DTR; 805 if (sc->sc_callback->ucom_cfg_set_rts) 806 mask |= UCOM_LS_RTS; 807 if (sc->sc_callback->ucom_cfg_set_break) 808 mask |= UCOM_LS_BREAK; 809 if (sc->sc_callback->ucom_cfg_set_ring) 810 mask |= UCOM_LS_RING; 811 812 /* compute the bits we are to program */ 813 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask; 814 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask; 815 prev_value = sc->sc_pls_curr ^ notch_bits; 816 last_value = sc->sc_pls_curr; 817 818 /* reset programmed line state */ 819 sc->sc_pls_curr = 0; 820 sc->sc_pls_set = 0; 821 sc->sc_pls_clr = 0; 822 823 /* ensure that we don't loose any levels */ 824 if (notch_bits & UCOM_LS_DTR) 825 sc->sc_callback->ucom_cfg_set_dtr(sc, 826 (prev_value & UCOM_LS_DTR) ? 1 : 0); 827 if (notch_bits & UCOM_LS_RTS) 828 sc->sc_callback->ucom_cfg_set_rts(sc, 829 (prev_value & UCOM_LS_RTS) ? 1 : 0); 830 if (notch_bits & UCOM_LS_BREAK) 831 sc->sc_callback->ucom_cfg_set_break(sc, 832 (prev_value & UCOM_LS_BREAK) ? 1 : 0); 833 if (notch_bits & UCOM_LS_RING) 834 sc->sc_callback->ucom_cfg_set_ring(sc, 835 (prev_value & UCOM_LS_RING) ? 1 : 0); 836 837 /* set last value */ 838 if (any_bits & UCOM_LS_DTR) 839 sc->sc_callback->ucom_cfg_set_dtr(sc, 840 (last_value & UCOM_LS_DTR) ? 1 : 0); 841 if (any_bits & UCOM_LS_RTS) 842 sc->sc_callback->ucom_cfg_set_rts(sc, 843 (last_value & UCOM_LS_RTS) ? 1 : 0); 844 if (any_bits & UCOM_LS_BREAK) 845 sc->sc_callback->ucom_cfg_set_break(sc, 846 (last_value & UCOM_LS_BREAK) ? 1 : 0); 847 if (any_bits & UCOM_LS_RING) 848 sc->sc_callback->ucom_cfg_set_ring(sc, 849 (last_value & UCOM_LS_RING) ? 1 : 0); 850} 851 852static void 853ucom_line_state(struct ucom_softc *sc, 854 uint8_t set_bits, uint8_t clear_bits) 855{ 856 mtx_assert(sc->sc_mtx, MA_OWNED); 857 858 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 859 return; 860 } 861 862 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits); 863 864 /* update current programmed line state */ 865 sc->sc_pls_curr |= set_bits; 866 sc->sc_pls_curr &= ~clear_bits; 867 sc->sc_pls_set |= set_bits; 868 sc->sc_pls_clr |= clear_bits; 869 870 /* defer driver programming */ 871 ucom_queue_command(sc, ucom_cfg_line_state, NULL, 872 &sc->sc_line_state_task[0].hdr, 873 &sc->sc_line_state_task[1].hdr); 874} 875 876static void 877ucom_ring(struct ucom_softc *sc, uint8_t onoff) 878{ 879 DPRINTF("onoff = %d\n", onoff); 880 881 if (onoff) 882 ucom_line_state(sc, UCOM_LS_RING, 0); 883 else 884 ucom_line_state(sc, 0, UCOM_LS_RING); 885} 886 887static void 888ucom_break(struct ucom_softc *sc, uint8_t onoff) 889{ 890 DPRINTF("onoff = %d\n", onoff); 891 892 if (onoff) 893 ucom_line_state(sc, UCOM_LS_BREAK, 0); 894 else 895 ucom_line_state(sc, 0, UCOM_LS_BREAK); 896} 897 898static void 899ucom_dtr(struct ucom_softc *sc, uint8_t onoff) 900{ 901 DPRINTF("onoff = %d\n", onoff); 902 903 if (onoff) 904 ucom_line_state(sc, UCOM_LS_DTR, 0); 905 else 906 ucom_line_state(sc, 0, UCOM_LS_DTR); 907} 908 909static void 910ucom_rts(struct ucom_softc *sc, uint8_t onoff) 911{ 912 DPRINTF("onoff = %d\n", onoff); 913 914 if (onoff) 915 ucom_line_state(sc, UCOM_LS_RTS, 0); 916 else 917 ucom_line_state(sc, 0, UCOM_LS_RTS); 918} 919 920static void 921ucom_cfg_status_change(struct usb_proc_msg *_task) 922{ 923 struct ucom_cfg_task *task = 924 (struct ucom_cfg_task *)_task; 925 struct ucom_softc *sc = task->sc; 926 struct tty *tp; 927 uint8_t new_msr; 928 uint8_t new_lsr; 929 uint8_t onoff; 930 uint8_t lsr_delta; 931 932 tp = sc->sc_tty; 933 934 mtx_assert(sc->sc_mtx, MA_OWNED); 935 936 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 937 return; 938 } 939 if (sc->sc_callback->ucom_cfg_get_status == NULL) { 940 return; 941 } 942 /* get status */ 943 944 new_msr = 0; 945 new_lsr = 0; 946 947 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr); 948 949 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 950 /* TTY device closed */ 951 return; 952 } 953 onoff = ((sc->sc_msr ^ new_msr) & SER_DCD); 954 lsr_delta = (sc->sc_lsr ^ new_lsr); 955 956 sc->sc_msr = new_msr; 957 sc->sc_lsr = new_lsr; 958 959 if (onoff) { 960 961 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0; 962 963 DPRINTF("DCD changed to %d\n", onoff); 964 965 ttydisc_modem(tp, onoff); 966 } 967 968 if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) { 969 970 DPRINTF("BREAK detected\n"); 971 972 ttydisc_rint(tp, 0, TRE_BREAK); 973 ttydisc_rint_done(tp); 974 } 975 976 if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) { 977 978 DPRINTF("Frame error detected\n"); 979 980 ttydisc_rint(tp, 0, TRE_FRAMING); 981 ttydisc_rint_done(tp); 982 } 983 984 if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) { 985 986 DPRINTF("Parity error detected\n"); 987 988 ttydisc_rint(tp, 0, TRE_PARITY); 989 ttydisc_rint_done(tp); 990 } 991} 992 993void 994ucom_status_change(struct ucom_softc *sc) 995{ 996 mtx_assert(sc->sc_mtx, MA_OWNED); 997 998 if (sc->sc_flag & UCOM_FLAG_CONSOLE) 999 return; /* not supported */ 1000 1001 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1002 return; 1003 } 1004 DPRINTF("\n"); 1005 1006 ucom_queue_command(sc, ucom_cfg_status_change, NULL, 1007 &sc->sc_status_task[0].hdr, 1008 &sc->sc_status_task[1].hdr); 1009} 1010 1011static void 1012ucom_cfg_param(struct usb_proc_msg *_task) 1013{ 1014 struct ucom_param_task *task = 1015 (struct ucom_param_task *)_task; 1016 struct ucom_softc *sc = task->sc; 1017 1018 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 1019 return; 1020 } 1021 if (sc->sc_callback->ucom_cfg_param == NULL) { 1022 return; 1023 } 1024 1025 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy); 1026 1027 /* wait a little */ 1028 usb_pause_mtx(sc->sc_mtx, hz / 10); 1029} 1030 1031static int 1032ucom_param(struct tty *tp, struct termios *t) 1033{ 1034 struct ucom_softc *sc = tty_softc(tp); 1035 uint8_t opened; 1036 int error; 1037 1038 mtx_assert(sc->sc_mtx, MA_OWNED); 1039 1040 opened = 0; 1041 error = 0; 1042 1043 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1044 1045 /* XXX the TTY layer should call "open()" first! */ 1046 1047 error = ucom_open(tp); 1048 if (error) { 1049 goto done; 1050 } 1051 opened = 1; 1052 } 1053 DPRINTF("sc = %p\n", sc); 1054 1055 /* Check requested parameters. */ 1056 if (t->c_ospeed < 0) { 1057 DPRINTF("negative ospeed\n"); 1058 error = EINVAL; 1059 goto done; 1060 } 1061 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) { 1062 DPRINTF("mismatch ispeed and ospeed\n"); 1063 error = EINVAL; 1064 goto done; 1065 } 1066 t->c_ispeed = t->c_ospeed; 1067 1068 if (sc->sc_callback->ucom_pre_param) { 1069 /* Let the lower layer verify the parameters */ 1070 error = (sc->sc_callback->ucom_pre_param) (sc, t); 1071 if (error) { 1072 DPRINTF("callback error = %d\n", error); 1073 goto done; 1074 } 1075 } 1076 1077 /* Disable transfers */ 1078 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 1079 1080 /* Queue baud rate programming command first */ 1081 ucom_queue_command(sc, ucom_cfg_param, t, 1082 &sc->sc_param_task[0].hdr, 1083 &sc->sc_param_task[1].hdr); 1084 1085 /* Queue transfer enable command last */ 1086 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 1087 &sc->sc_start_task[0].hdr, 1088 &sc->sc_start_task[1].hdr); 1089 1090 if (t->c_cflag & CRTS_IFLOW) { 1091 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW; 1092 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) { 1093 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW; 1094 ucom_modem(tp, SER_RTS, 0); 1095 } 1096done: 1097 if (error) { 1098 if (opened) { 1099 ucom_close(tp); 1100 } 1101 } 1102 return (error); 1103} 1104 1105static void 1106ucom_outwakeup(struct tty *tp) 1107{ 1108 struct ucom_softc *sc = tty_softc(tp); 1109 1110 mtx_assert(sc->sc_mtx, MA_OWNED); 1111 1112 DPRINTF("sc = %p\n", sc); 1113 1114 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1115 /* The higher layer is not ready */ 1116 return; 1117 } 1118 ucom_start_transfers(sc); 1119} 1120 1121/*------------------------------------------------------------------------* 1122 * ucom_get_data 1123 * 1124 * Return values: 1125 * 0: No data is available. 1126 * Else: Data is available. 1127 *------------------------------------------------------------------------*/ 1128uint8_t 1129ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1130 uint32_t offset, uint32_t len, uint32_t *actlen) 1131{ 1132 struct usb_page_search res; 1133 struct tty *tp = sc->sc_tty; 1134 uint32_t cnt; 1135 uint32_t offset_orig; 1136 1137 mtx_assert(sc->sc_mtx, MA_OWNED); 1138 1139 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1140 unsigned int temp; 1141 1142 /* get total TX length */ 1143 1144 temp = ucom_cons_tx_high - ucom_cons_tx_low; 1145 temp %= UCOM_CONS_BUFSIZE; 1146 1147 /* limit TX length */ 1148 1149 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low)) 1150 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low); 1151 1152 if (temp > len) 1153 temp = len; 1154 1155 /* copy in data */ 1156 1157 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp); 1158 1159 /* update counters */ 1160 1161 ucom_cons_tx_low += temp; 1162 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE; 1163 1164 /* store actual length */ 1165 1166 *actlen = temp; 1167 1168 return (temp ? 1 : 0); 1169 } 1170 1171 if (tty_gone(tp) || 1172 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) { 1173 actlen[0] = 0; 1174 return (0); /* multiport device polling */ 1175 } 1176 offset_orig = offset; 1177 1178 while (len != 0) { 1179 1180 usbd_get_page(pc, offset, &res); 1181 1182 if (res.length > len) { 1183 res.length = len; 1184 } 1185 /* copy data directly into USB buffer */ 1186 cnt = ttydisc_getc(tp, res.buffer, res.length); 1187 1188 offset += cnt; 1189 len -= cnt; 1190 1191 if (cnt < res.length) { 1192 /* end of buffer */ 1193 break; 1194 } 1195 } 1196 1197 actlen[0] = offset - offset_orig; 1198 1199 DPRINTF("cnt=%d\n", actlen[0]); 1200 1201 if (actlen[0] == 0) { 1202 return (0); 1203 } 1204 return (1); 1205} 1206 1207void 1208ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1209 uint32_t offset, uint32_t len) 1210{ 1211 struct usb_page_search res; 1212 struct tty *tp = sc->sc_tty; 1213 char *buf; 1214 uint32_t cnt; 1215 1216 mtx_assert(sc->sc_mtx, MA_OWNED); 1217 1218 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1219 unsigned int temp; 1220 1221 /* get maximum RX length */ 1222 1223 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low; 1224 temp %= UCOM_CONS_BUFSIZE; 1225 1226 /* limit RX length */ 1227 1228 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high)) 1229 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high); 1230 1231 if (temp > len) 1232 temp = len; 1233 1234 /* copy out data */ 1235 1236 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp); 1237 1238 /* update counters */ 1239 1240 ucom_cons_rx_high += temp; 1241 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE; 1242 1243 return; 1244 } 1245 1246 if (tty_gone(tp)) 1247 return; /* multiport device polling */ 1248 1249 if (len == 0) 1250 return; /* no data */ 1251 1252 /* set a flag to prevent recursation ? */ 1253 1254 while (len > 0) { 1255 1256 usbd_get_page(pc, offset, &res); 1257 1258 if (res.length > len) { 1259 res.length = len; 1260 } 1261 len -= res.length; 1262 offset += res.length; 1263 1264 /* pass characters to tty layer */ 1265 1266 buf = res.buffer; 1267 cnt = res.length; 1268 1269 /* first check if we can pass the buffer directly */ 1270 1271 if (ttydisc_can_bypass(tp)) { 1272 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) { 1273 DPRINTF("tp=%p, data lost\n", tp); 1274 } 1275 continue; 1276 } 1277 /* need to loop */ 1278 1279 for (cnt = 0; cnt != res.length; cnt++) { 1280 if (ttydisc_rint(tp, buf[cnt], 0) == -1) { 1281 /* XXX what should we do? */ 1282 1283 DPRINTF("tp=%p, lost %d " 1284 "chars\n", tp, res.length - cnt); 1285 break; 1286 } 1287 } 1288 } 1289 ttydisc_rint_done(tp); 1290} 1291 1292static void 1293ucom_free(void *xsc) 1294{ 1295 struct ucom_softc *sc = xsc; 1296 1297 mtx_lock(sc->sc_mtx); 1298 sc->sc_ttyfreed = 1; 1299 cv_signal(&sc->sc_cv); 1300 mtx_unlock(sc->sc_mtx); 1301} 1302 1303static cn_probe_t ucom_cnprobe; 1304static cn_init_t ucom_cninit; 1305static cn_term_t ucom_cnterm; 1306static cn_getc_t ucom_cngetc; 1307static cn_putc_t ucom_cnputc; 1308 1309CONSOLE_DRIVER(ucom); 1310 1311static void 1312ucom_cnprobe(struct consdev *cp) 1313{ 1314 if (ucom_cons_unit != -1) 1315 cp->cn_pri = CN_NORMAL; 1316 else 1317 cp->cn_pri = CN_DEAD; 1318 1319 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name)); 1320} 1321 1322static void 1323ucom_cninit(struct consdev *cp) 1324{ 1325} 1326 1327static void 1328ucom_cnterm(struct consdev *cp) 1329{ 1330} 1331 1332static int 1333ucom_cngetc(struct consdev *cd) 1334{ 1335 struct ucom_softc *sc = ucom_cons_softc; 1336 int c; 1337 1338 if (sc == NULL) 1339 return (-1); 1340 1341 mtx_lock(sc->sc_mtx); 1342 1343 if (ucom_cons_rx_low != ucom_cons_rx_high) { 1344 c = ucom_cons_rx_buf[ucom_cons_rx_low]; 1345 ucom_cons_rx_low ++; 1346 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE; 1347 } else { 1348 c = -1; 1349 } 1350 1351 /* start USB transfers */ 1352 ucom_outwakeup(sc->sc_tty); 1353 1354 mtx_unlock(sc->sc_mtx); 1355 1356 /* poll if necessary */ 1357 if (kdb_active && sc->sc_callback->ucom_poll) 1358 (sc->sc_callback->ucom_poll) (sc); 1359 1360 return (c); 1361} 1362 1363static void 1364ucom_cnputc(struct consdev *cd, int c) 1365{ 1366 struct ucom_softc *sc = ucom_cons_softc; 1367 unsigned int temp; 1368 1369 if (sc == NULL) 1370 return; 1371 1372 repeat: 1373 1374 mtx_lock(sc->sc_mtx); 1375 1376 /* compute maximum TX length */ 1377 1378 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low; 1379 temp %= UCOM_CONS_BUFSIZE; 1380 1381 if (temp) { 1382 ucom_cons_tx_buf[ucom_cons_tx_high] = c; 1383 ucom_cons_tx_high ++; 1384 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE; 1385 } 1386 1387 /* start USB transfers */ 1388 ucom_outwakeup(sc->sc_tty); 1389 1390 mtx_unlock(sc->sc_mtx); 1391 1392 /* poll if necessary */ 1393 if (kdb_active && sc->sc_callback->ucom_poll) { 1394 (sc->sc_callback->ucom_poll) (sc); 1395 /* simple flow control */ 1396 if (temp == 0) 1397 goto repeat; 1398 } 1399} 1400 1401#if defined(GDB) 1402 1403#include <gdb/gdb.h> 1404 1405static gdb_probe_f ucom_gdbprobe; 1406static gdb_init_f ucom_gdbinit; 1407static gdb_term_f ucom_gdbterm; 1408static gdb_getc_f ucom_gdbgetc; 1409static gdb_putc_f ucom_gdbputc; 1410 1411GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc); 1412 1413static int 1414ucom_gdbprobe(void) 1415{ 1416 return ((ucom_cons_softc != NULL) ? 0 : -1); 1417} 1418 1419static void 1420ucom_gdbinit(void) 1421{ 1422} 1423 1424static void 1425ucom_gdbterm(void) 1426{ 1427} 1428 1429static void 1430ucom_gdbputc(int c) 1431{ 1432 ucom_cnputc(NULL, c); 1433} 1434 1435static int 1436ucom_gdbgetc(void) 1437{ 1438 return (ucom_cngetc(NULL)); 1439} 1440 1441#endif 1442