usb_serial.c revision 230209
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 230209 2012-01-16 10:42:43Z hselasky $"); 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 104static SYSCTL_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 /* allocate a uniq unit number */ 252 ssc->sc_unit = ucom_unit_alloc(); 253 if (ssc->sc_unit == -1) 254 return (ENOMEM); 255 256 /* generate TTY name string */ 257 snprintf(ssc->sc_ttyname, sizeof(ssc->sc_ttyname), 258 UCOM_TTY_PREFIX "%d", ssc->sc_unit); 259 260 /* create USB request handling process */ 261 error = usb_proc_create(&ssc->sc_tq, mtx, "ucom", USB_PRI_MED); 262 if (error) { 263 ucom_unit_free(ssc->sc_unit); 264 return (error); 265 } 266 ssc->sc_subunits = subunits; 267 268 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) { 269 sc[subunit].sc_subunit = subunit; 270 sc[subunit].sc_super = ssc; 271 sc[subunit].sc_mtx = mtx; 272 sc[subunit].sc_parent = parent; 273 sc[subunit].sc_callback = callback; 274 275 error = ucom_attach_tty(ssc, &sc[subunit]); 276 if (error) { 277 ucom_detach(ssc, &sc[0]); 278 return (error); 279 } 280 sc[subunit].sc_flag |= UCOM_FLAG_ATTACHED; 281 } 282 283 DPRINTF("tp = %p, unit = %d, subunits = %d\n", 284 sc->sc_tty, ssc->sc_unit, ssc->sc_subunits); 285 286 return (0); 287} 288 289/* 290 * NOTE: the following function will do nothing if 291 * the structure pointed to by "ssc" and "sc" is zero. 292 */ 293void 294ucom_detach(struct ucom_super_softc *ssc, struct ucom_softc *sc) 295{ 296 uint32_t subunit; 297 298 if (ssc->sc_subunits == 0) 299 return; /* not initialized */ 300 301 if (ssc->sc_sysctl_ttyname != NULL) { 302 sysctl_remove_oid(ssc->sc_sysctl_ttyname, 1, 0); 303 ssc->sc_sysctl_ttyname = NULL; 304 } 305 306 if (ssc->sc_sysctl_ttyports != NULL) { 307 sysctl_remove_oid(ssc->sc_sysctl_ttyports, 1, 0); 308 ssc->sc_sysctl_ttyports = NULL; 309 } 310 311 usb_proc_drain(&ssc->sc_tq); 312 313 for (subunit = 0; subunit < ssc->sc_subunits; subunit++) { 314 if (sc[subunit].sc_flag & UCOM_FLAG_ATTACHED) { 315 316 ucom_detach_tty(&sc[subunit]); 317 318 /* avoid duplicate detach */ 319 sc[subunit].sc_flag &= ~UCOM_FLAG_ATTACHED; 320 } 321 } 322 ucom_unit_free(ssc->sc_unit); 323 usb_proc_free(&ssc->sc_tq); 324} 325 326static int 327ucom_attach_tty(struct ucom_super_softc *ssc, struct ucom_softc *sc) 328{ 329 struct tty *tp; 330 char buf[32]; /* temporary TTY device name buffer */ 331 332 tp = tty_alloc_mutex(&ucom_class, sc, sc->sc_mtx); 333 if (tp == NULL) 334 return (ENOMEM); 335 336 /* Check if the client has a custom TTY name */ 337 buf[0] = '\0'; 338 if (sc->sc_callback->ucom_tty_name) { 339 sc->sc_callback->ucom_tty_name(sc, buf, 340 sizeof(buf), ssc->sc_unit, sc->sc_subunit); 341 } 342 if (buf[0] == 0) { 343 /* Use default TTY name */ 344 if (ssc->sc_subunits > 1) { 345 /* multiple modems in one */ 346 snprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u.%u", 347 ssc->sc_unit, sc->sc_subunit); 348 } else { 349 /* single modem */ 350 snprintf(buf, sizeof(buf), UCOM_TTY_PREFIX "%u", 351 ssc->sc_unit); 352 } 353 } 354 tty_makedev(tp, NULL, "%s", buf); 355 356 sc->sc_tty = tp; 357 358 DPRINTF("ttycreate: %s\n", buf); 359 cv_init(&sc->sc_cv, "ucom"); 360 361 /* Check if this device should be a console */ 362 if ((ucom_cons_softc == NULL) && 363 (ssc->sc_unit == ucom_cons_unit) && 364 (sc->sc_subunit == ucom_cons_subunit)) { 365 struct termios t; 366 367 DPRINTF("unit %d subunit %d is console", ssc->sc_unit, sc->sc_subunit); 368 369 ucom_cons_softc = sc; 370 371 memset(&t, 0, sizeof(t)); 372 t.c_ispeed = ucom_cons_baud; 373 t.c_ospeed = t.c_ispeed; 374 t.c_cflag = CS8; 375 376 mtx_lock(ucom_cons_softc->sc_mtx); 377 ucom_cons_rx_low = 0; 378 ucom_cons_rx_high = 0; 379 ucom_cons_tx_low = 0; 380 ucom_cons_tx_high = 0; 381 sc->sc_flag |= UCOM_FLAG_CONSOLE; 382 ucom_open(ucom_cons_softc->sc_tty); 383 ucom_param(ucom_cons_softc->sc_tty, &t); 384 mtx_unlock(ucom_cons_softc->sc_mtx); 385 } 386 387 return (0); 388} 389 390static void 391ucom_detach_tty(struct ucom_softc *sc) 392{ 393 struct tty *tp = sc->sc_tty; 394 395 DPRINTF("sc = %p, tp = %p\n", sc, sc->sc_tty); 396 397 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 398 mtx_lock(ucom_cons_softc->sc_mtx); 399 ucom_close(ucom_cons_softc->sc_tty); 400 sc->sc_flag &= ~UCOM_FLAG_CONSOLE; 401 mtx_unlock(ucom_cons_softc->sc_mtx); 402 ucom_cons_softc = NULL; 403 } 404 405 /* the config thread has been stopped when we get here */ 406 407 mtx_lock(sc->sc_mtx); 408 sc->sc_flag |= UCOM_FLAG_GONE; 409 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_LL_READY); 410 mtx_unlock(sc->sc_mtx); 411 if (tp) { 412 tty_lock(tp); 413 414 ucom_close(tp); /* close, if any */ 415 416 tty_rel_gone(tp); 417 418 mtx_lock(sc->sc_mtx); 419 /* Wait for the callback after the TTY is torn down */ 420 while (sc->sc_ttyfreed == 0) 421 cv_wait(&sc->sc_cv, sc->sc_mtx); 422 /* 423 * make sure that read and write transfers are stopped 424 */ 425 if (sc->sc_callback->ucom_stop_read) { 426 (sc->sc_callback->ucom_stop_read) (sc); 427 } 428 if (sc->sc_callback->ucom_stop_write) { 429 (sc->sc_callback->ucom_stop_write) (sc); 430 } 431 mtx_unlock(sc->sc_mtx); 432 } 433 cv_destroy(&sc->sc_cv); 434} 435 436void 437ucom_set_pnpinfo_usb(struct ucom_super_softc *ssc, device_t dev) 438{ 439 char buf[64]; 440 uint8_t iface_index; 441 struct usb_attach_arg *uaa; 442 443 snprintf(buf, sizeof(buf), "ttyname=" UCOM_TTY_PREFIX 444 "%d ttyports=%d", ssc->sc_unit, ssc->sc_subunits); 445 446 /* Store the PNP info in the first interface for the device */ 447 uaa = device_get_ivars(dev); 448 iface_index = uaa->info.bIfaceIndex; 449 450 if (usbd_set_pnpinfo(uaa->device, iface_index, buf) != 0) 451 device_printf(dev, "Could not set PNP info\n"); 452 453 /* 454 * The following information is also replicated in the PNP-info 455 * string which is registered above: 456 */ 457 if (ssc->sc_sysctl_ttyname == NULL) { 458 ssc->sc_sysctl_ttyname = SYSCTL_ADD_STRING(NULL, 459 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 460 OID_AUTO, "ttyname", CTLFLAG_RD, ssc->sc_ttyname, 0, 461 "TTY device basename"); 462 } 463 if (ssc->sc_sysctl_ttyports == NULL) { 464 ssc->sc_sysctl_ttyports = SYSCTL_ADD_INT(NULL, 465 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), 466 OID_AUTO, "ttyports", CTLFLAG_RD, 467 NULL, ssc->sc_subunits, "Number of ports"); 468 } 469} 470 471static void 472ucom_queue_command(struct ucom_softc *sc, 473 usb_proc_callback_t *fn, struct termios *pt, 474 struct usb_proc_msg *t0, struct usb_proc_msg *t1) 475{ 476 struct ucom_super_softc *ssc = sc->sc_super; 477 struct ucom_param_task *task; 478 479 mtx_assert(sc->sc_mtx, MA_OWNED); 480 481 if (usb_proc_is_gone(&ssc->sc_tq)) { 482 DPRINTF("proc is gone\n"); 483 return; /* nothing to do */ 484 } 485 /* 486 * NOTE: The task cannot get executed before we drop the 487 * "sc_mtx" mutex. It is safe to update fields in the message 488 * structure after that the message got queued. 489 */ 490 task = (struct ucom_param_task *) 491 usb_proc_msignal(&ssc->sc_tq, t0, t1); 492 493 /* Setup callback and softc pointers */ 494 task->hdr.pm_callback = fn; 495 task->sc = sc; 496 497 /* 498 * Make a copy of the termios. This field is only present if 499 * the "pt" field is not NULL. 500 */ 501 if (pt != NULL) 502 task->termios_copy = *pt; 503 504 /* 505 * Closing the device should be synchronous. 506 */ 507 if (fn == ucom_cfg_close) 508 usb_proc_mwait(&ssc->sc_tq, t0, t1); 509 510 /* 511 * In case of multiple configure requests, 512 * keep track of the last one! 513 */ 514 if (fn == ucom_cfg_start_transfers) 515 sc->sc_last_start_xfer = &task->hdr; 516} 517 518static void 519ucom_shutdown(struct ucom_softc *sc) 520{ 521 struct tty *tp = sc->sc_tty; 522 523 mtx_assert(sc->sc_mtx, MA_OWNED); 524 525 DPRINTF("\n"); 526 527 /* 528 * Hang up if necessary: 529 */ 530 if (tp->t_termios.c_cflag & HUPCL) { 531 ucom_modem(tp, 0, SER_DTR); 532 } 533} 534 535/* 536 * Return values: 537 * 0: normal 538 * else: taskqueue is draining or gone 539 */ 540uint8_t 541ucom_cfg_is_gone(struct ucom_softc *sc) 542{ 543 struct ucom_super_softc *ssc = sc->sc_super; 544 545 return (usb_proc_is_gone(&ssc->sc_tq)); 546} 547 548static void 549ucom_cfg_start_transfers(struct usb_proc_msg *_task) 550{ 551 struct ucom_cfg_task *task = 552 (struct ucom_cfg_task *)_task; 553 struct ucom_softc *sc = task->sc; 554 555 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 556 return; 557 } 558 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 559 /* TTY device closed */ 560 return; 561 } 562 563 if (_task == sc->sc_last_start_xfer) 564 sc->sc_flag |= UCOM_FLAG_GP_DATA; 565 566 if (sc->sc_callback->ucom_start_read) { 567 (sc->sc_callback->ucom_start_read) (sc); 568 } 569 if (sc->sc_callback->ucom_start_write) { 570 (sc->sc_callback->ucom_start_write) (sc); 571 } 572} 573 574static void 575ucom_start_transfers(struct ucom_softc *sc) 576{ 577 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 578 return; 579 } 580 /* 581 * Make sure that data transfers are started in both 582 * directions: 583 */ 584 if (sc->sc_callback->ucom_start_read) { 585 (sc->sc_callback->ucom_start_read) (sc); 586 } 587 if (sc->sc_callback->ucom_start_write) { 588 (sc->sc_callback->ucom_start_write) (sc); 589 } 590} 591 592static void 593ucom_cfg_open(struct usb_proc_msg *_task) 594{ 595 struct ucom_cfg_task *task = 596 (struct ucom_cfg_task *)_task; 597 struct ucom_softc *sc = task->sc; 598 599 DPRINTF("\n"); 600 601 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 602 603 /* already opened */ 604 605 } else { 606 607 sc->sc_flag |= UCOM_FLAG_LL_READY; 608 609 if (sc->sc_callback->ucom_cfg_open) { 610 (sc->sc_callback->ucom_cfg_open) (sc); 611 612 /* wait a little */ 613 usb_pause_mtx(sc->sc_mtx, hz / 10); 614 } 615 } 616} 617 618static int 619ucom_open(struct tty *tp) 620{ 621 struct ucom_softc *sc = tty_softc(tp); 622 int error; 623 624 mtx_assert(sc->sc_mtx, MA_OWNED); 625 626 if (sc->sc_flag & UCOM_FLAG_GONE) { 627 return (ENXIO); 628 } 629 if (sc->sc_flag & UCOM_FLAG_HL_READY) { 630 /* already opened */ 631 return (0); 632 } 633 DPRINTF("tp = %p\n", tp); 634 635 if (sc->sc_callback->ucom_pre_open) { 636 /* 637 * give the lower layer a chance to disallow TTY open, for 638 * example if the device is not present: 639 */ 640 error = (sc->sc_callback->ucom_pre_open) (sc); 641 if (error) { 642 return (error); 643 } 644 } 645 sc->sc_flag |= UCOM_FLAG_HL_READY; 646 647 /* Disable transfers */ 648 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 649 650 sc->sc_lsr = 0; 651 sc->sc_msr = 0; 652 sc->sc_mcr = 0; 653 654 /* reset programmed line state */ 655 sc->sc_pls_curr = 0; 656 sc->sc_pls_set = 0; 657 sc->sc_pls_clr = 0; 658 659 ucom_queue_command(sc, ucom_cfg_open, NULL, 660 &sc->sc_open_task[0].hdr, 661 &sc->sc_open_task[1].hdr); 662 663 /* Queue transfer enable command last */ 664 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 665 &sc->sc_start_task[0].hdr, 666 &sc->sc_start_task[1].hdr); 667 668 ucom_modem(tp, SER_DTR | SER_RTS, 0); 669 670 ucom_ring(sc, 0); 671 672 ucom_break(sc, 0); 673 674 ucom_status_change(sc); 675 676 return (0); 677} 678 679static void 680ucom_cfg_close(struct usb_proc_msg *_task) 681{ 682 struct ucom_cfg_task *task = 683 (struct ucom_cfg_task *)_task; 684 struct ucom_softc *sc = task->sc; 685 686 DPRINTF("\n"); 687 688 if (sc->sc_flag & UCOM_FLAG_LL_READY) { 689 sc->sc_flag &= ~UCOM_FLAG_LL_READY; 690 if (sc->sc_callback->ucom_cfg_close) 691 (sc->sc_callback->ucom_cfg_close) (sc); 692 } else { 693 /* already closed */ 694 } 695} 696 697static void 698ucom_close(struct tty *tp) 699{ 700 struct ucom_softc *sc = tty_softc(tp); 701 702 mtx_assert(sc->sc_mtx, MA_OWNED); 703 704 DPRINTF("tp=%p\n", tp); 705 706 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 707 DPRINTF("tp=%p already closed\n", tp); 708 return; 709 } 710 ucom_shutdown(sc); 711 712 ucom_queue_command(sc, ucom_cfg_close, NULL, 713 &sc->sc_close_task[0].hdr, 714 &sc->sc_close_task[1].hdr); 715 716 sc->sc_flag &= ~(UCOM_FLAG_HL_READY | UCOM_FLAG_RTS_IFLOW); 717 718 if (sc->sc_callback->ucom_stop_read) { 719 (sc->sc_callback->ucom_stop_read) (sc); 720 } 721} 722 723static int 724ucom_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td) 725{ 726 struct ucom_softc *sc = tty_softc(tp); 727 int error; 728 729 mtx_assert(sc->sc_mtx, MA_OWNED); 730 731 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 732 return (EIO); 733 } 734 DPRINTF("cmd = 0x%08lx\n", cmd); 735 736 switch (cmd) { 737#if 0 738 case TIOCSRING: 739 ucom_ring(sc, 1); 740 error = 0; 741 break; 742 case TIOCCRING: 743 ucom_ring(sc, 0); 744 error = 0; 745 break; 746#endif 747 case TIOCSBRK: 748 ucom_break(sc, 1); 749 error = 0; 750 break; 751 case TIOCCBRK: 752 ucom_break(sc, 0); 753 error = 0; 754 break; 755 default: 756 if (sc->sc_callback->ucom_ioctl) { 757 error = (sc->sc_callback->ucom_ioctl) 758 (sc, cmd, data, 0, td); 759 } else { 760 error = ENOIOCTL; 761 } 762 break; 763 } 764 return (error); 765} 766 767static int 768ucom_modem(struct tty *tp, int sigon, int sigoff) 769{ 770 struct ucom_softc *sc = tty_softc(tp); 771 uint8_t onoff; 772 773 mtx_assert(sc->sc_mtx, MA_OWNED); 774 775 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 776 return (0); 777 } 778 if ((sigon == 0) && (sigoff == 0)) { 779 780 if (sc->sc_mcr & SER_DTR) { 781 sigon |= SER_DTR; 782 } 783 if (sc->sc_mcr & SER_RTS) { 784 sigon |= SER_RTS; 785 } 786 if (sc->sc_msr & SER_CTS) { 787 sigon |= SER_CTS; 788 } 789 if (sc->sc_msr & SER_DCD) { 790 sigon |= SER_DCD; 791 } 792 if (sc->sc_msr & SER_DSR) { 793 sigon |= SER_DSR; 794 } 795 if (sc->sc_msr & SER_RI) { 796 sigon |= SER_RI; 797 } 798 return (sigon); 799 } 800 if (sigon & SER_DTR) { 801 sc->sc_mcr |= SER_DTR; 802 } 803 if (sigoff & SER_DTR) { 804 sc->sc_mcr &= ~SER_DTR; 805 } 806 if (sigon & SER_RTS) { 807 sc->sc_mcr |= SER_RTS; 808 } 809 if (sigoff & SER_RTS) { 810 sc->sc_mcr &= ~SER_RTS; 811 } 812 onoff = (sc->sc_mcr & SER_DTR) ? 1 : 0; 813 ucom_dtr(sc, onoff); 814 815 onoff = (sc->sc_mcr & SER_RTS) ? 1 : 0; 816 ucom_rts(sc, onoff); 817 818 return (0); 819} 820 821static void 822ucom_cfg_line_state(struct usb_proc_msg *_task) 823{ 824 struct ucom_cfg_task *task = 825 (struct ucom_cfg_task *)_task; 826 struct ucom_softc *sc = task->sc; 827 uint8_t notch_bits; 828 uint8_t any_bits; 829 uint8_t prev_value; 830 uint8_t last_value; 831 uint8_t mask; 832 833 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 834 return; 835 } 836 837 mask = 0; 838 /* compute callback mask */ 839 if (sc->sc_callback->ucom_cfg_set_dtr) 840 mask |= UCOM_LS_DTR; 841 if (sc->sc_callback->ucom_cfg_set_rts) 842 mask |= UCOM_LS_RTS; 843 if (sc->sc_callback->ucom_cfg_set_break) 844 mask |= UCOM_LS_BREAK; 845 if (sc->sc_callback->ucom_cfg_set_ring) 846 mask |= UCOM_LS_RING; 847 848 /* compute the bits we are to program */ 849 notch_bits = (sc->sc_pls_set & sc->sc_pls_clr) & mask; 850 any_bits = (sc->sc_pls_set | sc->sc_pls_clr) & mask; 851 prev_value = sc->sc_pls_curr ^ notch_bits; 852 last_value = sc->sc_pls_curr; 853 854 /* reset programmed line state */ 855 sc->sc_pls_curr = 0; 856 sc->sc_pls_set = 0; 857 sc->sc_pls_clr = 0; 858 859 /* ensure that we don't loose any levels */ 860 if (notch_bits & UCOM_LS_DTR) 861 sc->sc_callback->ucom_cfg_set_dtr(sc, 862 (prev_value & UCOM_LS_DTR) ? 1 : 0); 863 if (notch_bits & UCOM_LS_RTS) 864 sc->sc_callback->ucom_cfg_set_rts(sc, 865 (prev_value & UCOM_LS_RTS) ? 1 : 0); 866 if (notch_bits & UCOM_LS_BREAK) 867 sc->sc_callback->ucom_cfg_set_break(sc, 868 (prev_value & UCOM_LS_BREAK) ? 1 : 0); 869 if (notch_bits & UCOM_LS_RING) 870 sc->sc_callback->ucom_cfg_set_ring(sc, 871 (prev_value & UCOM_LS_RING) ? 1 : 0); 872 873 /* set last value */ 874 if (any_bits & UCOM_LS_DTR) 875 sc->sc_callback->ucom_cfg_set_dtr(sc, 876 (last_value & UCOM_LS_DTR) ? 1 : 0); 877 if (any_bits & UCOM_LS_RTS) 878 sc->sc_callback->ucom_cfg_set_rts(sc, 879 (last_value & UCOM_LS_RTS) ? 1 : 0); 880 if (any_bits & UCOM_LS_BREAK) 881 sc->sc_callback->ucom_cfg_set_break(sc, 882 (last_value & UCOM_LS_BREAK) ? 1 : 0); 883 if (any_bits & UCOM_LS_RING) 884 sc->sc_callback->ucom_cfg_set_ring(sc, 885 (last_value & UCOM_LS_RING) ? 1 : 0); 886} 887 888static void 889ucom_line_state(struct ucom_softc *sc, 890 uint8_t set_bits, uint8_t clear_bits) 891{ 892 mtx_assert(sc->sc_mtx, MA_OWNED); 893 894 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 895 return; 896 } 897 898 DPRINTF("on=0x%02x, off=0x%02x\n", set_bits, clear_bits); 899 900 /* update current programmed line state */ 901 sc->sc_pls_curr |= set_bits; 902 sc->sc_pls_curr &= ~clear_bits; 903 sc->sc_pls_set |= set_bits; 904 sc->sc_pls_clr |= clear_bits; 905 906 /* defer driver programming */ 907 ucom_queue_command(sc, ucom_cfg_line_state, NULL, 908 &sc->sc_line_state_task[0].hdr, 909 &sc->sc_line_state_task[1].hdr); 910} 911 912static void 913ucom_ring(struct ucom_softc *sc, uint8_t onoff) 914{ 915 DPRINTF("onoff = %d\n", onoff); 916 917 if (onoff) 918 ucom_line_state(sc, UCOM_LS_RING, 0); 919 else 920 ucom_line_state(sc, 0, UCOM_LS_RING); 921} 922 923static void 924ucom_break(struct ucom_softc *sc, uint8_t onoff) 925{ 926 DPRINTF("onoff = %d\n", onoff); 927 928 if (onoff) 929 ucom_line_state(sc, UCOM_LS_BREAK, 0); 930 else 931 ucom_line_state(sc, 0, UCOM_LS_BREAK); 932} 933 934static void 935ucom_dtr(struct ucom_softc *sc, uint8_t onoff) 936{ 937 DPRINTF("onoff = %d\n", onoff); 938 939 if (onoff) 940 ucom_line_state(sc, UCOM_LS_DTR, 0); 941 else 942 ucom_line_state(sc, 0, UCOM_LS_DTR); 943} 944 945static void 946ucom_rts(struct ucom_softc *sc, uint8_t onoff) 947{ 948 DPRINTF("onoff = %d\n", onoff); 949 950 if (onoff) 951 ucom_line_state(sc, UCOM_LS_RTS, 0); 952 else 953 ucom_line_state(sc, 0, UCOM_LS_RTS); 954} 955 956static void 957ucom_cfg_status_change(struct usb_proc_msg *_task) 958{ 959 struct ucom_cfg_task *task = 960 (struct ucom_cfg_task *)_task; 961 struct ucom_softc *sc = task->sc; 962 struct tty *tp; 963 uint8_t new_msr; 964 uint8_t new_lsr; 965 uint8_t onoff; 966 uint8_t lsr_delta; 967 968 tp = sc->sc_tty; 969 970 mtx_assert(sc->sc_mtx, MA_OWNED); 971 972 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 973 return; 974 } 975 if (sc->sc_callback->ucom_cfg_get_status == NULL) { 976 return; 977 } 978 /* get status */ 979 980 new_msr = 0; 981 new_lsr = 0; 982 983 (sc->sc_callback->ucom_cfg_get_status) (sc, &new_lsr, &new_msr); 984 985 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 986 /* TTY device closed */ 987 return; 988 } 989 onoff = ((sc->sc_msr ^ new_msr) & SER_DCD); 990 lsr_delta = (sc->sc_lsr ^ new_lsr); 991 992 sc->sc_msr = new_msr; 993 sc->sc_lsr = new_lsr; 994 995 if (onoff) { 996 997 onoff = (sc->sc_msr & SER_DCD) ? 1 : 0; 998 999 DPRINTF("DCD changed to %d\n", onoff); 1000 1001 ttydisc_modem(tp, onoff); 1002 } 1003 1004 if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) { 1005 1006 DPRINTF("BREAK detected\n"); 1007 1008 ttydisc_rint(tp, 0, TRE_BREAK); 1009 ttydisc_rint_done(tp); 1010 } 1011 1012 if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) { 1013 1014 DPRINTF("Frame error detected\n"); 1015 1016 ttydisc_rint(tp, 0, TRE_FRAMING); 1017 ttydisc_rint_done(tp); 1018 } 1019 1020 if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) { 1021 1022 DPRINTF("Parity error detected\n"); 1023 1024 ttydisc_rint(tp, 0, TRE_PARITY); 1025 ttydisc_rint_done(tp); 1026 } 1027} 1028 1029void 1030ucom_status_change(struct ucom_softc *sc) 1031{ 1032 mtx_assert(sc->sc_mtx, MA_OWNED); 1033 1034 if (sc->sc_flag & UCOM_FLAG_CONSOLE) 1035 return; /* not supported */ 1036 1037 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1038 return; 1039 } 1040 DPRINTF("\n"); 1041 1042 ucom_queue_command(sc, ucom_cfg_status_change, NULL, 1043 &sc->sc_status_task[0].hdr, 1044 &sc->sc_status_task[1].hdr); 1045} 1046 1047static void 1048ucom_cfg_param(struct usb_proc_msg *_task) 1049{ 1050 struct ucom_param_task *task = 1051 (struct ucom_param_task *)_task; 1052 struct ucom_softc *sc = task->sc; 1053 1054 if (!(sc->sc_flag & UCOM_FLAG_LL_READY)) { 1055 return; 1056 } 1057 if (sc->sc_callback->ucom_cfg_param == NULL) { 1058 return; 1059 } 1060 1061 (sc->sc_callback->ucom_cfg_param) (sc, &task->termios_copy); 1062 1063 /* wait a little */ 1064 usb_pause_mtx(sc->sc_mtx, hz / 10); 1065} 1066 1067static int 1068ucom_param(struct tty *tp, struct termios *t) 1069{ 1070 struct ucom_softc *sc = tty_softc(tp); 1071 uint8_t opened; 1072 int error; 1073 1074 mtx_assert(sc->sc_mtx, MA_OWNED); 1075 1076 opened = 0; 1077 error = 0; 1078 1079 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1080 1081 /* XXX the TTY layer should call "open()" first! */ 1082 1083 error = ucom_open(tp); 1084 if (error) { 1085 goto done; 1086 } 1087 opened = 1; 1088 } 1089 DPRINTF("sc = %p\n", sc); 1090 1091 /* Check requested parameters. */ 1092 if (t->c_ospeed < 0) { 1093 DPRINTF("negative ospeed\n"); 1094 error = EINVAL; 1095 goto done; 1096 } 1097 if (t->c_ispeed && (t->c_ispeed != t->c_ospeed)) { 1098 DPRINTF("mismatch ispeed and ospeed\n"); 1099 error = EINVAL; 1100 goto done; 1101 } 1102 t->c_ispeed = t->c_ospeed; 1103 1104 if (sc->sc_callback->ucom_pre_param) { 1105 /* Let the lower layer verify the parameters */ 1106 error = (sc->sc_callback->ucom_pre_param) (sc, t); 1107 if (error) { 1108 DPRINTF("callback error = %d\n", error); 1109 goto done; 1110 } 1111 } 1112 1113 /* Disable transfers */ 1114 sc->sc_flag &= ~UCOM_FLAG_GP_DATA; 1115 1116 /* Queue baud rate programming command first */ 1117 ucom_queue_command(sc, ucom_cfg_param, t, 1118 &sc->sc_param_task[0].hdr, 1119 &sc->sc_param_task[1].hdr); 1120 1121 /* Queue transfer enable command last */ 1122 ucom_queue_command(sc, ucom_cfg_start_transfers, NULL, 1123 &sc->sc_start_task[0].hdr, 1124 &sc->sc_start_task[1].hdr); 1125 1126 if (t->c_cflag & CRTS_IFLOW) { 1127 sc->sc_flag |= UCOM_FLAG_RTS_IFLOW; 1128 } else if (sc->sc_flag & UCOM_FLAG_RTS_IFLOW) { 1129 sc->sc_flag &= ~UCOM_FLAG_RTS_IFLOW; 1130 ucom_modem(tp, SER_RTS, 0); 1131 } 1132done: 1133 if (error) { 1134 if (opened) { 1135 ucom_close(tp); 1136 } 1137 } 1138 return (error); 1139} 1140 1141static void 1142ucom_outwakeup(struct tty *tp) 1143{ 1144 struct ucom_softc *sc = tty_softc(tp); 1145 1146 mtx_assert(sc->sc_mtx, MA_OWNED); 1147 1148 DPRINTF("sc = %p\n", sc); 1149 1150 if (!(sc->sc_flag & UCOM_FLAG_HL_READY)) { 1151 /* The higher layer is not ready */ 1152 return; 1153 } 1154 ucom_start_transfers(sc); 1155} 1156 1157/*------------------------------------------------------------------------* 1158 * ucom_get_data 1159 * 1160 * Return values: 1161 * 0: No data is available. 1162 * Else: Data is available. 1163 *------------------------------------------------------------------------*/ 1164uint8_t 1165ucom_get_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1166 uint32_t offset, uint32_t len, uint32_t *actlen) 1167{ 1168 struct usb_page_search res; 1169 struct tty *tp = sc->sc_tty; 1170 uint32_t cnt; 1171 uint32_t offset_orig; 1172 1173 mtx_assert(sc->sc_mtx, MA_OWNED); 1174 1175 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1176 unsigned int temp; 1177 1178 /* get total TX length */ 1179 1180 temp = ucom_cons_tx_high - ucom_cons_tx_low; 1181 temp %= UCOM_CONS_BUFSIZE; 1182 1183 /* limit TX length */ 1184 1185 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_tx_low)) 1186 temp = (UCOM_CONS_BUFSIZE - ucom_cons_tx_low); 1187 1188 if (temp > len) 1189 temp = len; 1190 1191 /* copy in data */ 1192 1193 usbd_copy_in(pc, offset, ucom_cons_tx_buf + ucom_cons_tx_low, temp); 1194 1195 /* update counters */ 1196 1197 ucom_cons_tx_low += temp; 1198 ucom_cons_tx_low %= UCOM_CONS_BUFSIZE; 1199 1200 /* store actual length */ 1201 1202 *actlen = temp; 1203 1204 return (temp ? 1 : 0); 1205 } 1206 1207 if (tty_gone(tp) || 1208 !(sc->sc_flag & UCOM_FLAG_GP_DATA)) { 1209 actlen[0] = 0; 1210 return (0); /* multiport device polling */ 1211 } 1212 offset_orig = offset; 1213 1214 while (len != 0) { 1215 1216 usbd_get_page(pc, offset, &res); 1217 1218 if (res.length > len) { 1219 res.length = len; 1220 } 1221 /* copy data directly into USB buffer */ 1222 cnt = ttydisc_getc(tp, res.buffer, res.length); 1223 1224 offset += cnt; 1225 len -= cnt; 1226 1227 if (cnt < res.length) { 1228 /* end of buffer */ 1229 break; 1230 } 1231 } 1232 1233 actlen[0] = offset - offset_orig; 1234 1235 DPRINTF("cnt=%d\n", actlen[0]); 1236 1237 if (actlen[0] == 0) { 1238 return (0); 1239 } 1240 return (1); 1241} 1242 1243void 1244ucom_put_data(struct ucom_softc *sc, struct usb_page_cache *pc, 1245 uint32_t offset, uint32_t len) 1246{ 1247 struct usb_page_search res; 1248 struct tty *tp = sc->sc_tty; 1249 char *buf; 1250 uint32_t cnt; 1251 1252 mtx_assert(sc->sc_mtx, MA_OWNED); 1253 1254 if (sc->sc_flag & UCOM_FLAG_CONSOLE) { 1255 unsigned int temp; 1256 1257 /* get maximum RX length */ 1258 1259 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_rx_high + ucom_cons_rx_low; 1260 temp %= UCOM_CONS_BUFSIZE; 1261 1262 /* limit RX length */ 1263 1264 if (temp > (UCOM_CONS_BUFSIZE - ucom_cons_rx_high)) 1265 temp = (UCOM_CONS_BUFSIZE - ucom_cons_rx_high); 1266 1267 if (temp > len) 1268 temp = len; 1269 1270 /* copy out data */ 1271 1272 usbd_copy_out(pc, offset, ucom_cons_rx_buf + ucom_cons_rx_high, temp); 1273 1274 /* update counters */ 1275 1276 ucom_cons_rx_high += temp; 1277 ucom_cons_rx_high %= UCOM_CONS_BUFSIZE; 1278 1279 return; 1280 } 1281 1282 if (tty_gone(tp)) 1283 return; /* multiport device polling */ 1284 1285 if (len == 0) 1286 return; /* no data */ 1287 1288 /* set a flag to prevent recursation ? */ 1289 1290 while (len > 0) { 1291 1292 usbd_get_page(pc, offset, &res); 1293 1294 if (res.length > len) { 1295 res.length = len; 1296 } 1297 len -= res.length; 1298 offset += res.length; 1299 1300 /* pass characters to tty layer */ 1301 1302 buf = res.buffer; 1303 cnt = res.length; 1304 1305 /* first check if we can pass the buffer directly */ 1306 1307 if (ttydisc_can_bypass(tp)) { 1308 if (ttydisc_rint_bypass(tp, buf, cnt) != cnt) { 1309 DPRINTF("tp=%p, data lost\n", tp); 1310 } 1311 continue; 1312 } 1313 /* need to loop */ 1314 1315 for (cnt = 0; cnt != res.length; cnt++) { 1316 if (ttydisc_rint(tp, buf[cnt], 0) == -1) { 1317 /* XXX what should we do? */ 1318 1319 DPRINTF("tp=%p, lost %d " 1320 "chars\n", tp, res.length - cnt); 1321 break; 1322 } 1323 } 1324 } 1325 ttydisc_rint_done(tp); 1326} 1327 1328static void 1329ucom_free(void *xsc) 1330{ 1331 struct ucom_softc *sc = xsc; 1332 1333 mtx_lock(sc->sc_mtx); 1334 sc->sc_ttyfreed = 1; 1335 cv_signal(&sc->sc_cv); 1336 mtx_unlock(sc->sc_mtx); 1337} 1338 1339static cn_probe_t ucom_cnprobe; 1340static cn_init_t ucom_cninit; 1341static cn_term_t ucom_cnterm; 1342static cn_getc_t ucom_cngetc; 1343static cn_putc_t ucom_cnputc; 1344static cn_grab_t ucom_cngrab; 1345static cn_ungrab_t ucom_cnungrab; 1346 1347CONSOLE_DRIVER(ucom); 1348 1349static void 1350ucom_cnprobe(struct consdev *cp) 1351{ 1352 if (ucom_cons_unit != -1) 1353 cp->cn_pri = CN_NORMAL; 1354 else 1355 cp->cn_pri = CN_DEAD; 1356 1357 strlcpy(cp->cn_name, "ucom", sizeof(cp->cn_name)); 1358} 1359 1360static void 1361ucom_cninit(struct consdev *cp) 1362{ 1363} 1364 1365static void 1366ucom_cnterm(struct consdev *cp) 1367{ 1368} 1369 1370static void 1371ucom_cngrab(struct consdev *cp) 1372{ 1373} 1374 1375static void 1376ucom_cnungrab(struct consdev *cp) 1377{ 1378} 1379 1380static int 1381ucom_cngetc(struct consdev *cd) 1382{ 1383 struct ucom_softc *sc = ucom_cons_softc; 1384 int c; 1385 1386 if (sc == NULL) 1387 return (-1); 1388 1389 mtx_lock(sc->sc_mtx); 1390 1391 if (ucom_cons_rx_low != ucom_cons_rx_high) { 1392 c = ucom_cons_rx_buf[ucom_cons_rx_low]; 1393 ucom_cons_rx_low ++; 1394 ucom_cons_rx_low %= UCOM_CONS_BUFSIZE; 1395 } else { 1396 c = -1; 1397 } 1398 1399 /* start USB transfers */ 1400 ucom_outwakeup(sc->sc_tty); 1401 1402 mtx_unlock(sc->sc_mtx); 1403 1404 /* poll if necessary */ 1405 if (kdb_active && sc->sc_callback->ucom_poll) 1406 (sc->sc_callback->ucom_poll) (sc); 1407 1408 return (c); 1409} 1410 1411static void 1412ucom_cnputc(struct consdev *cd, int c) 1413{ 1414 struct ucom_softc *sc = ucom_cons_softc; 1415 unsigned int temp; 1416 1417 if (sc == NULL) 1418 return; 1419 1420 repeat: 1421 1422 mtx_lock(sc->sc_mtx); 1423 1424 /* compute maximum TX length */ 1425 1426 temp = (UCOM_CONS_BUFSIZE - 1) - ucom_cons_tx_high + ucom_cons_tx_low; 1427 temp %= UCOM_CONS_BUFSIZE; 1428 1429 if (temp) { 1430 ucom_cons_tx_buf[ucom_cons_tx_high] = c; 1431 ucom_cons_tx_high ++; 1432 ucom_cons_tx_high %= UCOM_CONS_BUFSIZE; 1433 } 1434 1435 /* start USB transfers */ 1436 ucom_outwakeup(sc->sc_tty); 1437 1438 mtx_unlock(sc->sc_mtx); 1439 1440 /* poll if necessary */ 1441 if (kdb_active && sc->sc_callback->ucom_poll) { 1442 (sc->sc_callback->ucom_poll) (sc); 1443 /* simple flow control */ 1444 if (temp == 0) 1445 goto repeat; 1446 } 1447} 1448 1449#if defined(GDB) 1450 1451#include <gdb/gdb.h> 1452 1453static gdb_probe_f ucom_gdbprobe; 1454static gdb_init_f ucom_gdbinit; 1455static gdb_term_f ucom_gdbterm; 1456static gdb_getc_f ucom_gdbgetc; 1457static gdb_putc_f ucom_gdbputc; 1458 1459GDB_DBGPORT(sio, ucom_gdbprobe, ucom_gdbinit, ucom_gdbterm, ucom_gdbgetc, ucom_gdbputc); 1460 1461static int 1462ucom_gdbprobe(void) 1463{ 1464 return ((ucom_cons_softc != NULL) ? 0 : -1); 1465} 1466 1467static void 1468ucom_gdbinit(void) 1469{ 1470} 1471 1472static void 1473ucom_gdbterm(void) 1474{ 1475} 1476 1477static void 1478ucom_gdbputc(int c) 1479{ 1480 ucom_cnputc(NULL, c); 1481} 1482 1483static int 1484ucom_gdbgetc(void) 1485{ 1486 return (ucom_cngetc(NULL)); 1487} 1488 1489#endif 1490