sscom.c revision 1.8
1 /* $NetBSD: sscom.c,v 1.8 2003/07/15 00:24:49 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Fujitsu Component Limited 5 * Copyright (c) 2002 Genetec Corporation 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 * 3. Neither the name of The Fujitsu Component Limited nor the name of 17 * Genetec corporation may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC 21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC 25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /*- 36 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to The NetBSD Foundation 40 * by Charles M. Hannum. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the NetBSD 53 * Foundation, Inc. and its contributors. 54 * 4. Neither the name of The NetBSD Foundation nor the names of its 55 * contributors may be used to endorse or promote products derived 56 * from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 68 * POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 /* 72 * Copyright (c) 1991 The Regents of the University of California. 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by the University of 86 * California, Berkeley and its contributors. 87 * 4. Neither the name of the University nor the names of its contributors 88 * may be used to endorse or promote products derived from this software 89 * without specific prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * @(#)com.c 7.5 (Berkeley) 5/16/91 104 */ 105 106 /* 107 * Support integrated UARTs of Samsung S3C2800/2400X/2410X 108 * Derived from sys/dev/ic/com.c 109 */ 110 111 #include <sys/cdefs.h> 112 __KERNEL_RCSID(0, "$NetBSD: sscom.c,v 1.8 2003/07/15 00:24:49 lukem Exp $"); 113 114 #include "opt_sscom.h" 115 #include "opt_ddb.h" 116 #include "opt_kgdb.h" 117 #include "opt_multiprocessor.h" 118 #include "opt_lockdebug.h" 119 120 #include "rnd.h" 121 #if NRND > 0 && defined(RND_COM) 122 #include <sys/rnd.h> 123 #endif 124 125 /* 126 * Override cnmagic(9) macro before including <sys/systm.h>. 127 * We need to know if cn_check_magic triggered debugger, so set a flag. 128 * Callers of cn_check_magic must declare int cn_trapped = 0; 129 * XXX: this is *ugly*! 130 */ 131 #define cn_trap() \ 132 do { \ 133 console_debugger(); \ 134 cn_trapped = 1; \ 135 } while (/* CONSTCOND */ 0) 136 137 #include <sys/param.h> 138 #include <sys/systm.h> 139 #include <sys/ioctl.h> 140 #include <sys/select.h> 141 #include <sys/tty.h> 142 #include <sys/proc.h> 143 #include <sys/user.h> 144 #include <sys/conf.h> 145 #include <sys/file.h> 146 #include <sys/uio.h> 147 #include <sys/kernel.h> 148 #include <sys/syslog.h> 149 #include <sys/types.h> 150 #include <sys/device.h> 151 #include <sys/malloc.h> 152 #include <sys/timepps.h> 153 #include <sys/vnode.h> 154 155 #include <machine/intr.h> 156 #include <machine/bus.h> 157 158 #include <arm/s3c2xx0/s3c2xx0reg.h> 159 #include <arm/s3c2xx0/s3c2xx0var.h> 160 #include <arm/s3c2xx0/sscom_var.h> 161 #include <dev/cons.h> 162 163 dev_type_open(sscomopen); 164 dev_type_close(sscomclose); 165 dev_type_read(sscomread); 166 dev_type_write(sscomwrite); 167 dev_type_ioctl(sscomioctl); 168 dev_type_stop(sscomstop); 169 dev_type_tty(sscomtty); 170 dev_type_poll(sscompoll); 171 172 int sscomcngetc (dev_t); 173 void sscomcnputc (dev_t, int); 174 void sscomcnpollc (dev_t, int); 175 176 #define integrate static inline 177 void sscomsoft (void *); 178 179 integrate void sscom_rxsoft (struct sscom_softc *, struct tty *); 180 integrate void sscom_txsoft (struct sscom_softc *, struct tty *); 181 integrate void sscom_stsoft (struct sscom_softc *, struct tty *); 182 integrate void sscom_schedrx (struct sscom_softc *); 183 static void sscom_modem(struct sscom_softc *, int); 184 static void sscom_break(struct sscom_softc *, int); 185 static void sscom_iflush(struct sscom_softc *); 186 static void sscom_hwiflow(struct sscom_softc *); 187 static void sscom_loadchannelregs(struct sscom_softc *); 188 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 189 static int sscom_to_tiocm(struct sscom_softc *); 190 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 191 static int sscom_to_tiocm(struct sscom_softc *); 192 static void sscom_iflush(struct sscom_softc *); 193 194 static int sscomhwiflow(struct tty *tp, int block); 195 static int sscom_init(bus_space_tag_t, const struct sscom_uart_info *, 196 int, int, tcflag_t, bus_space_handle_t *); 197 198 extern struct cfdriver sscom_cd; 199 200 const struct cdevsw sscom_cdevsw = { 201 sscomopen, sscomclose, sscomread, sscomwrite, sscomioctl, 202 sscomstop, sscomtty, sscompoll, nommap, ttykqfilter, D_TTY 203 }; 204 205 /* 206 * Make this an option variable one can patch. 207 * But be warned: this must be a power of 2! 208 */ 209 u_int sscom_rbuf_size = SSCOM_RING_SIZE; 210 211 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 212 u_int sscom_rbuf_hiwat = (SSCOM_RING_SIZE * 1) / 4; 213 u_int sscom_rbuf_lowat = (SSCOM_RING_SIZE * 3) / 4; 214 215 static int sscomconsunit = -1; 216 static bus_space_tag_t sscomconstag; 217 static bus_space_handle_t sscomconsioh; 218 static int sscomconsattached; 219 static int sscomconsrate; 220 static tcflag_t sscomconscflag; 221 static struct cnm_state sscom_cnm_state; 222 223 #ifdef KGDB 224 #include <sys/kgdb.h> 225 226 static int sscom_kgdb_unit = -1; 227 static bus_space_tag_t sscom_kgdb_iot; 228 static bus_space_handle_t sscom_kgdb_ioh; 229 static int sscom_kgdb_attached; 230 231 int sscom_kgdb_getc (void *); 232 void sscom_kgdb_putc (void *, int); 233 #endif /* KGDB */ 234 235 #define SSCOMUNIT_MASK 0x7f 236 #define SSCOMDIALOUT_MASK 0x80 237 238 #define SSCOMUNIT(x) (minor(x) & SSCOMUNIT_MASK) 239 #define SSCOMDIALOUT(x) (minor(x) & SSCOMDIALOUT_MASK) 240 241 #if 0 242 #define SSCOM_ISALIVE(sc) ((sc)->enabled != 0 && \ 243 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 244 #else 245 #define SSCOM_ISALIVE(sc) ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE) 246 #endif 247 248 #define BR BUS_SPACE_BARRIER_READ 249 #define BW BUS_SPACE_BARRIER_WRITE 250 #define SSCOM_BARRIER(t, h, f) /* no-op */ 251 252 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 253 254 #define SSCOM_LOCK(sc) simple_lock(&(sc)->sc_lock) 255 #define SSCOM_UNLOCK(sc) simple_unlock(&(sc)->sc_lock) 256 257 #else 258 259 #define SSCOM_LOCK(sc) 260 #define SSCOM_UNLOCK(sc) 261 262 #endif 263 264 #ifndef SSCOM_TOLERANCE 265 #define SSCOM_TOLERANCE 30 /* XXX: baud rate tolerance, in 0.1% units */ 266 #endif 267 268 /* value for UCON */ 269 #define UCON_RXINT_MASK \ 270 (UCON_RXMODE_MASK|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE) 271 #define UCON_RXINT_ENABLE \ 272 (UCON_RXMODE_INT|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE_LEVEL) 273 #define UCON_TXINT_MASK (UCON_TXMODE_MASK|UCON_TXINT_TYPE) 274 #define UCON_TXINT_ENABLE (UCON_TXMODE_INT|UCON_TXINT_TYPE_LEVEL) 275 276 /* we don't want tx interrupt on debug port, but it is needed to 277 have transmitter active */ 278 #define UCON_DEBUGPORT (UCON_RXINT_ENABLE|UCON_TXINT_ENABLE) 279 280 281 static __inline void 282 sscom_output_chunk( struct sscom_softc *sc ) 283 { 284 int n, space; 285 bus_space_tag_t iot = sc->sc_iot; 286 bus_space_handle_t ioh = sc->sc_ioh; 287 288 n = sc->sc_tbc; 289 space = 16 - ((bus_space_read_2(iot, ioh, SSCOM_UFSTAT) & 290 UFSTAT_TXCOUNT) >> UFSTAT_TXCOUNT_SHIFT); 291 292 if (n > space) 293 n = space; 294 295 if (n > 0) { 296 bus_space_write_multi_1(iot, ioh, SSCOM_UTXH, sc->sc_tba, n); 297 sc->sc_tbc -= n; 298 sc->sc_tba += n; 299 } 300 } 301 302 303 304 int 305 sscomspeed(long speed, long frequency) 306 { 307 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 308 309 int x, err; 310 311 if (speed <= 0) 312 return -1; 313 x = divrnd(frequency / 16, speed); 314 if (x <= 0) 315 return -1; 316 err = divrnd(((quad_t)frequency) * 1000 / 16, speed * x) - 1000; 317 if (err < 0) 318 err = -err; 319 if (err > SSCOM_TOLERANCE) 320 return -1; 321 return x-1; 322 323 #undef divrnd 324 } 325 326 void sscomstatus (struct sscom_softc *, char *); 327 328 #ifdef SSCOM_DEBUG 329 int sscom_debug = 0; 330 331 void 332 sscomstatus(struct sscom_softc *sc, char *str) 333 { 334 struct tty *tp = sc->sc_tty; 335 int umstat = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMSTAT); 336 int umcon = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMCON); 337 338 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 339 sc->sc_dev.dv_xname, str, 340 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 341 "+", /* DCD */ 342 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 343 "+", /* DTR */ 344 sc->sc_tx_stopped ? "+" : "-"); 345 346 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 347 sc->sc_dev.dv_xname, str, 348 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 349 ISSET(umstat, UMSTAT_CTS) ? "+" : "-", 350 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 351 ISSET(umcon, UMCON_RTS) ? "+" : "-", 352 sc->sc_rx_flags); 353 } 354 #else 355 #define sscom_debug 0 356 #endif 357 358 static void 359 sscom_enable_debugport(struct sscom_softc *sc) 360 { 361 int s; 362 363 /* Turn on line break interrupt, set carrier. */ 364 s = splserial(); 365 SSCOM_LOCK(sc); 366 sc->sc_ucon = UCON_DEBUGPORT; 367 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 368 sc->sc_umcon = UMCON_RTS|UMCON_DTR; 369 sc->set_modem_control(sc); 370 sscom_enable_rxint(sc); 371 sscom_disable_txint(sc); 372 SSCOM_UNLOCK(sc); 373 splx(s); 374 } 375 376 static void 377 sscom_set_modem_control(struct sscom_softc *sc) 378 { 379 /* flob RTS */ 380 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 381 SSCOM_UMCON, sc->sc_umcon & UMCON_HW_MASK); 382 /* ignore DTR */ 383 } 384 385 static int 386 sscom_read_modem_status(struct sscom_softc *sc) 387 { 388 int msts; 389 390 msts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SSCOM_UMSTAT); 391 392 /* DCD and DSR are always on */ 393 return (msts & UMSTAT_CTS) | MSTS_DCD | MSTS_DSR; 394 } 395 396 void 397 sscom_attach_subr(struct sscom_softc *sc) 398 { 399 int unit = sc->sc_unit; 400 bus_space_tag_t iot = sc->sc_iot; 401 bus_space_handle_t ioh = sc->sc_ioh; 402 struct tty *tp; 403 404 callout_init(&sc->sc_diag_callout); 405 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 406 simple_lock_init(&sc->sc_lock); 407 #endif 408 409 sc->sc_ucon = UCON_RXINT_ENABLE|UCON_TXINT_ENABLE; 410 411 /* 412 * set default for modem control hook 413 */ 414 if (sc->set_modem_control == NULL) 415 sc->set_modem_control = sscom_set_modem_control; 416 if (sc->read_modem_status == NULL) 417 sc->read_modem_status = sscom_read_modem_status; 418 419 /* Disable interrupts before configuring the device. */ 420 sscom_disable_txrxint(sc); 421 422 #ifdef KGDB 423 /* 424 * Allow kgdb to "take over" this port. If this is 425 * the kgdb device, it has exclusive use. 426 */ 427 if (unit == sscom_kgdb_unit) { 428 SET(sc->sc_hwflags, SSCOM_HW_KGDB); 429 sc->sc_ucon = UCON_DEBUGPORT; 430 } 431 #endif 432 433 if (unit == sscomconsunit) { 434 sscomconsattached = 1; 435 436 sscomconstag = iot; 437 sscomconsioh = ioh; 438 439 /* Make sure the console is always "hardwired". */ 440 delay(1000); /* XXX: wait for output to finish */ 441 SET(sc->sc_hwflags, SSCOM_HW_CONSOLE); 442 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 443 444 sc->sc_ucon = UCON_DEBUGPORT; 445 } 446 447 bus_space_write_1(iot, ioh, SSCOM_UFCON, 448 UFCON_TXTRIGGER_8|UFCON_RXTRIGGER_8|UFCON_FIFO_ENABLE| 449 UFCON_TXFIFO_RESET|UFCON_RXFIFO_RESET); 450 451 bus_space_write_1(iot, ioh, SSCOM_UCON, sc->sc_ucon); 452 453 #ifdef KGDB 454 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) { 455 sscom_kgdb_attached = 1; 456 printf("%s: kgdb\n", sc->sc_dev.dv_xname); 457 sscom_enable_debugport(sc); 458 return; 459 } 460 #endif 461 462 463 464 tp = ttymalloc(); 465 tp->t_oproc = sscomstart; 466 tp->t_param = sscomparam; 467 tp->t_hwiflow = sscomhwiflow; 468 469 sc->sc_tty = tp; 470 sc->sc_rbuf = malloc(sscom_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 471 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 472 sc->sc_rbavail = sscom_rbuf_size; 473 if (sc->sc_rbuf == NULL) { 474 printf("%s: unable to allocate ring buffer\n", 475 sc->sc_dev.dv_xname); 476 return; 477 } 478 sc->sc_ebuf = sc->sc_rbuf + (sscom_rbuf_size << 1); 479 480 tty_attach(tp); 481 482 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 483 int maj; 484 485 /* locate the major number */ 486 maj = cdevsw_lookup_major(&sscom_cdevsw); 487 488 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 489 490 printf("%s: console (major=%d)\n", sc->sc_dev.dv_xname, maj); 491 } 492 493 494 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sscomsoft, sc); 495 496 #if NRND > 0 && defined(RND_COM) 497 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 498 RND_TYPE_TTY, 0); 499 #endif 500 501 /* if there are no enable/disable functions, assume the device 502 is always enabled */ 503 504 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 505 sscom_enable_debugport(sc); 506 else 507 sscom_disable_txrxint(sc); 508 509 SET(sc->sc_hwflags, SSCOM_HW_DEV_OK); 510 } 511 512 int 513 sscom_detach(struct device *self, int flags) 514 { 515 return 0; 516 } 517 518 int 519 sscom_activate(struct device *self, enum devact act) 520 { 521 #ifdef notyet 522 struct sscom_softc *sc = (struct sscom_softc *)self; 523 int s, rv = 0; 524 525 s = splserial(); 526 SSCOM_LOCK(sc); 527 switch (act) { 528 case DVACT_ACTIVATE: 529 rv = EOPNOTSUPP; 530 break; 531 532 case DVACT_DEACTIVATE: 533 if (sc->sc_hwflags & (SSCOM_HW_CONSOLE|SSCOM_HW_KGDB)) { 534 rv = EBUSY; 535 break; 536 } 537 538 sc->enabled = 0; 539 break; 540 } 541 542 SSCOM_UNLOCK(sc); 543 splx(s); 544 return rv; 545 #else 546 return 0; 547 #endif 548 } 549 550 void 551 sscom_shutdown(struct sscom_softc *sc) 552 { 553 #ifdef notyet 554 struct tty *tp = sc->sc_tty; 555 int s; 556 557 s = splserial(); 558 SSCOM_LOCK(sc); 559 560 /* If we were asserting flow control, then deassert it. */ 561 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 562 sscom_hwiflow(sc); 563 564 /* Clear any break condition set with TIOCSBRK. */ 565 sscom_break(sc, 0); 566 567 /* 568 * Hang up if necessary. Wait a bit, so the other side has time to 569 * notice even if we immediately open the port again. 570 * Avoid tsleeping above splhigh(). 571 */ 572 if (ISSET(tp->t_cflag, HUPCL)) { 573 sscom_modem(sc, 0); 574 SSCOM_UNLOCK(sc); 575 splx(s); 576 /* XXX tsleep will only timeout */ 577 (void) tsleep(sc, TTIPRI, ttclos, hz); 578 s = splserial(); 579 SSCOM_LOCK(sc); 580 } 581 582 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 583 /* interrupt on break */ 584 sc->sc_ucon = UCON_DEBUGPORT; 585 else 586 sc->sc_ucon = 0; 587 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 588 589 #ifdef DIAGNOSTIC 590 if (!sc->enabled) 591 panic("sscom_shutdown: not enabled?"); 592 #endif 593 sc->enabled = 0; 594 SSCOM_UNLOCK(sc); 595 splx(s); 596 #endif 597 } 598 599 int 600 sscomopen(dev_t dev, int flag, int mode, struct proc *p) 601 { 602 struct sscom_softc *sc; 603 struct tty *tp; 604 int s, s2; 605 int error; 606 607 sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 608 if (sc == NULL || !ISSET(sc->sc_hwflags, SSCOM_HW_DEV_OK) || 609 sc->sc_rbuf == NULL) 610 return ENXIO; 611 612 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 613 return ENXIO; 614 615 #ifdef KGDB 616 /* 617 * If this is the kgdb port, no other use is permitted. 618 */ 619 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) 620 return EBUSY; 621 #endif 622 623 tp = sc->sc_tty; 624 625 if (ISSET(tp->t_state, TS_ISOPEN) && 626 ISSET(tp->t_state, TS_XCLUDE) && 627 p->p_ucred->cr_uid != 0) 628 return EBUSY; 629 630 s = spltty(); 631 632 /* 633 * Do the following iff this is a first open. 634 */ 635 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 636 struct termios t; 637 638 tp->t_dev = dev; 639 640 s2 = splserial(); 641 SSCOM_LOCK(sc); 642 643 /* Turn on interrupts. */ 644 sscom_enable_txrxint(sc); 645 646 /* Fetch the current modem control status, needed later. */ 647 sc->sc_msts = sc->read_modem_status(sc); 648 649 #if 0 650 /* Clear PPS capture state on first open. */ 651 sc->sc_ppsmask = 0; 652 sc->ppsparam.mode = 0; 653 #endif 654 655 SSCOM_UNLOCK(sc); 656 splx(s2); 657 658 /* 659 * Initialize the termios status to the defaults. Add in the 660 * sticky bits from TIOCSFLAGS. 661 */ 662 t.c_ispeed = 0; 663 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 664 t.c_ospeed = sscomconsrate; 665 t.c_cflag = sscomconscflag; 666 } else { 667 t.c_ospeed = TTYDEF_SPEED; 668 t.c_cflag = TTYDEF_CFLAG; 669 } 670 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 671 SET(t.c_cflag, CLOCAL); 672 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 673 SET(t.c_cflag, CRTSCTS); 674 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 675 SET(t.c_cflag, MDMBUF); 676 /* Make sure sscomparam() will do something. */ 677 tp->t_ospeed = 0; 678 (void) sscomparam(tp, &t); 679 tp->t_iflag = TTYDEF_IFLAG; 680 tp->t_oflag = TTYDEF_OFLAG; 681 tp->t_lflag = TTYDEF_LFLAG; 682 ttychars(tp); 683 ttsetwater(tp); 684 685 s2 = splserial(); 686 SSCOM_LOCK(sc); 687 688 /* 689 * Turn on DTR. We must always do this, even if carrier is not 690 * present, because otherwise we'd have to use TIOCSDTR 691 * immediately after setting CLOCAL, which applications do not 692 * expect. We always assert DTR while the device is open 693 * unless explicitly requested to deassert it. 694 */ 695 sscom_modem(sc, 1); 696 697 /* Clear the input ring, and unblock. */ 698 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 699 sc->sc_rbavail = sscom_rbuf_size; 700 sscom_iflush(sc); 701 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 702 sscom_hwiflow(sc); 703 704 if (sscom_debug) 705 sscomstatus(sc, "sscomopen "); 706 707 SSCOM_UNLOCK(sc); 708 splx(s2); 709 } 710 711 splx(s); 712 713 error = ttyopen(tp, SSCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 714 if (error) 715 goto bad; 716 717 error = (*tp->t_linesw->l_open)(dev, tp); 718 if (error) 719 goto bad; 720 721 return 0; 722 723 bad: 724 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 725 /* 726 * We failed to open the device, and nobody else had it opened. 727 * Clean up the state as appropriate. 728 */ 729 sscom_shutdown(sc); 730 } 731 732 return error; 733 } 734 735 int 736 sscomclose(dev_t dev, int flag, int mode, struct proc *p) 737 { 738 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 739 struct tty *tp = sc->sc_tty; 740 741 /* XXX This is for cons.c. */ 742 if (!ISSET(tp->t_state, TS_ISOPEN)) 743 return 0; 744 745 (*tp->t_linesw->l_close)(tp, flag); 746 ttyclose(tp); 747 748 if (SSCOM_ISALIVE(sc) == 0) 749 return 0; 750 751 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 752 /* 753 * Although we got a last close, the device may still be in 754 * use; e.g. if this was the dialout node, and there are still 755 * processes waiting for carrier on the non-dialout node. 756 */ 757 sscom_shutdown(sc); 758 } 759 760 return 0; 761 } 762 763 int 764 sscomread(dev_t dev, struct uio *uio, int flag) 765 { 766 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 767 struct tty *tp = sc->sc_tty; 768 769 if (SSCOM_ISALIVE(sc) == 0) 770 return EIO; 771 772 return (*tp->t_linesw->l_read)(tp, uio, flag); 773 } 774 775 int 776 sscomwrite(dev_t dev, struct uio *uio, int flag) 777 { 778 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 779 struct tty *tp = sc->sc_tty; 780 781 if (SSCOM_ISALIVE(sc) == 0) 782 return EIO; 783 784 return (*tp->t_linesw->l_write)(tp, uio, flag); 785 } 786 787 int 788 sscompoll(dev_t dev, int events, struct proc *p) 789 { 790 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 791 struct tty *tp = sc->sc_tty; 792 793 if (SSCOM_ISALIVE(sc) == 0) 794 return EIO; 795 796 return (*tp->t_linesw->l_poll)(tp, events, p); 797 } 798 799 struct tty * 800 sscomtty(dev_t dev) 801 { 802 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 803 struct tty *tp = sc->sc_tty; 804 805 return tp; 806 } 807 808 int 809 sscomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 810 { 811 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 812 struct tty *tp = sc->sc_tty; 813 int error; 814 int s; 815 816 if (SSCOM_ISALIVE(sc) == 0) 817 return EIO; 818 819 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 820 if (error != EPASSTHROUGH) 821 return error; 822 823 error = ttioctl(tp, cmd, data, flag, p); 824 if (error != EPASSTHROUGH) 825 return error; 826 827 error = 0; 828 829 s = splserial(); 830 SSCOM_LOCK(sc); 831 832 switch (cmd) { 833 case TIOCSBRK: 834 sscom_break(sc, 1); 835 break; 836 837 case TIOCCBRK: 838 sscom_break(sc, 0); 839 break; 840 841 case TIOCSDTR: 842 sscom_modem(sc, 1); 843 break; 844 845 case TIOCCDTR: 846 sscom_modem(sc, 0); 847 break; 848 849 case TIOCGFLAGS: 850 *(int *)data = sc->sc_swflags; 851 break; 852 853 case TIOCSFLAGS: 854 error = suser(p->p_ucred, &p->p_acflag); 855 if (error) 856 break; 857 sc->sc_swflags = *(int *)data; 858 break; 859 860 case TIOCMSET: 861 case TIOCMBIS: 862 case TIOCMBIC: 863 tiocm_to_sscom(sc, cmd, *(int *)data); 864 break; 865 866 case TIOCMGET: 867 *(int *)data = sscom_to_tiocm(sc); 868 break; 869 870 default: 871 error = EPASSTHROUGH; 872 break; 873 } 874 875 SSCOM_UNLOCK(sc); 876 splx(s); 877 878 if (sscom_debug) 879 sscomstatus(sc, "sscomioctl "); 880 881 return error; 882 } 883 884 integrate void 885 sscom_schedrx(struct sscom_softc *sc) 886 { 887 888 sc->sc_rx_ready = 1; 889 890 /* Wake up the poller. */ 891 softintr_schedule(sc->sc_si); 892 } 893 894 static void 895 sscom_break(struct sscom_softc *sc, int onoff) 896 { 897 898 if (onoff) 899 SET(sc->sc_ucon, UCON_SBREAK); 900 else 901 CLR(sc->sc_ucon, UCON_SBREAK); 902 903 if (!sc->sc_heldchange) { 904 if (sc->sc_tx_busy) { 905 sc->sc_heldtbc = sc->sc_tbc; 906 sc->sc_tbc = 0; 907 sc->sc_heldchange = 1; 908 } else 909 sscom_loadchannelregs(sc); 910 } 911 } 912 913 static void 914 sscom_modem(struct sscom_softc *sc, int onoff) 915 { 916 if (onoff) 917 SET(sc->sc_umcon, UMCON_DTR); 918 else 919 CLR(sc->sc_umcon, UMCON_DTR); 920 921 if (!sc->sc_heldchange) { 922 if (sc->sc_tx_busy) { 923 sc->sc_heldtbc = sc->sc_tbc; 924 sc->sc_tbc = 0; 925 sc->sc_heldchange = 1; 926 } else 927 sscom_loadchannelregs(sc); 928 } 929 } 930 931 static void 932 tiocm_to_sscom(struct sscom_softc *sc, u_long how, int ttybits) 933 { 934 u_char sscombits; 935 936 sscombits = 0; 937 if (ISSET(ttybits, TIOCM_DTR)) 938 sscombits = UMCON_DTR; 939 if (ISSET(ttybits, TIOCM_RTS)) 940 SET(sscombits, UMCON_RTS); 941 942 switch (how) { 943 case TIOCMBIC: 944 CLR(sc->sc_umcon, sscombits); 945 break; 946 947 case TIOCMBIS: 948 SET(sc->sc_umcon, sscombits); 949 break; 950 951 case TIOCMSET: 952 CLR(sc->sc_umcon, UMCON_DTR|UMCON_RTS); 953 SET(sc->sc_umcon, sscombits); 954 break; 955 } 956 957 if (!sc->sc_heldchange) { 958 if (sc->sc_tx_busy) { 959 sc->sc_heldtbc = sc->sc_tbc; 960 sc->sc_tbc = 0; 961 sc->sc_heldchange = 1; 962 } else 963 sscom_loadchannelregs(sc); 964 } 965 } 966 967 static int 968 sscom_to_tiocm(struct sscom_softc *sc) 969 { 970 u_char sscombits; 971 int ttybits = 0; 972 973 sscombits = sc->sc_umcon; 974 #if 0 975 if (ISSET(sscombits, MCR_DTR)) 976 SET(ttybits, TIOCM_DTR); 977 #endif 978 if (ISSET(sscombits, UMCON_RTS)) 979 SET(ttybits, TIOCM_RTS); 980 981 sscombits = sc->sc_msts; 982 if (ISSET(sscombits, MSTS_DCD)) 983 SET(ttybits, TIOCM_CD); 984 if (ISSET(sscombits, MSTS_DSR)) 985 SET(ttybits, TIOCM_DSR); 986 if (ISSET(sscombits, MSTS_CTS)) 987 SET(ttybits, TIOCM_CTS); 988 989 if (sc->sc_ucon != 0) 990 SET(ttybits, TIOCM_LE); 991 992 return ttybits; 993 } 994 995 static int 996 cflag2lcr(tcflag_t cflag) 997 { 998 u_char lcr = ULCON_PARITY_NONE; 999 1000 switch (cflag & (PARENB|PARODD)) { 1001 case PARENB|PARODD: lcr = ULCON_PARITY_ODD; break; 1002 case PARENB: lcr = ULCON_PARITY_EVEN; 1003 } 1004 1005 switch (ISSET(cflag, CSIZE)) { 1006 case CS5: 1007 SET(lcr, ULCON_LENGTH_5); 1008 break; 1009 case CS6: 1010 SET(lcr, ULCON_LENGTH_6); 1011 break; 1012 case CS7: 1013 SET(lcr, ULCON_LENGTH_7); 1014 break; 1015 case CS8: 1016 SET(lcr, ULCON_LENGTH_8); 1017 break; 1018 } 1019 if (ISSET(cflag, CSTOPB)) 1020 SET(lcr, ULCON_STOP); 1021 1022 return lcr; 1023 } 1024 1025 int 1026 sscomparam(struct tty *tp, struct termios *t) 1027 { 1028 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1029 int ospeed; 1030 u_char lcr; 1031 int s; 1032 1033 if (SSCOM_ISALIVE(sc) == 0) 1034 return EIO; 1035 1036 ospeed = sscomspeed(t->c_ospeed, sc->sc_frequency); 1037 1038 /* Check requested parameters. */ 1039 if (ospeed < 0) 1040 return EINVAL; 1041 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1042 return EINVAL; 1043 1044 /* 1045 * For the console, always force CLOCAL and !HUPCL, so that the port 1046 * is always active. 1047 */ 1048 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 1049 ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 1050 SET(t->c_cflag, CLOCAL); 1051 CLR(t->c_cflag, HUPCL); 1052 } 1053 1054 /* 1055 * If there were no changes, don't do anything. This avoids dropping 1056 * input and improves performance when all we did was frob things like 1057 * VMIN and VTIME. 1058 */ 1059 if (tp->t_ospeed == t->c_ospeed && 1060 tp->t_cflag == t->c_cflag) 1061 return 0; 1062 1063 lcr = cflag2lcr(t->c_cflag); 1064 1065 s = splserial(); 1066 SSCOM_LOCK(sc); 1067 1068 sc->sc_ulcon = lcr; 1069 1070 /* 1071 * If we're not in a mode that assumes a connection is present, then 1072 * ignore carrier changes. 1073 */ 1074 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1075 sc->sc_msr_dcd = 0; 1076 else 1077 sc->sc_msr_dcd = MSTS_DCD; 1078 1079 /* 1080 * Set the flow control pins depending on the current flow control 1081 * mode. 1082 */ 1083 if (ISSET(t->c_cflag, CRTSCTS)) { 1084 sc->sc_mcr_dtr = UMCON_DTR; 1085 sc->sc_mcr_rts = UMCON_RTS; 1086 sc->sc_msr_cts = MSTS_CTS; 1087 } 1088 else if (ISSET(t->c_cflag, MDMBUF)) { 1089 /* 1090 * For DTR/DCD flow control, make sure we don't toggle DTR for 1091 * carrier detection. 1092 */ 1093 sc->sc_mcr_dtr = 0; 1094 sc->sc_mcr_rts = UMCON_DTR; 1095 sc->sc_msr_cts = MSTS_DCD; 1096 } 1097 else { 1098 /* 1099 * If no flow control, then always set RTS. This will make 1100 * the other side happy if it mistakenly thinks we're doing 1101 * RTS/CTS flow control. 1102 */ 1103 sc->sc_mcr_dtr = UMCON_DTR | UMCON_RTS; 1104 sc->sc_mcr_rts = 0; 1105 sc->sc_msr_cts = 0; 1106 if (ISSET(sc->sc_umcon, UMCON_DTR)) 1107 SET(sc->sc_umcon, UMCON_RTS); 1108 else 1109 CLR(sc->sc_umcon, UMCON_RTS); 1110 } 1111 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 1112 1113 if (ospeed == 0) 1114 CLR(sc->sc_umcon, sc->sc_mcr_dtr); 1115 else 1116 SET(sc->sc_umcon, sc->sc_mcr_dtr); 1117 1118 sc->sc_ubrdiv = ospeed; 1119 1120 /* And copy to tty. */ 1121 tp->t_ispeed = 0; 1122 tp->t_ospeed = t->c_ospeed; 1123 tp->t_cflag = t->c_cflag; 1124 1125 if (!sc->sc_heldchange) { 1126 if (sc->sc_tx_busy) { 1127 sc->sc_heldtbc = sc->sc_tbc; 1128 sc->sc_tbc = 0; 1129 sc->sc_heldchange = 1; 1130 } else 1131 sscom_loadchannelregs(sc); 1132 } 1133 1134 if (!ISSET(t->c_cflag, CHWFLOW)) { 1135 /* Disable the high water mark. */ 1136 sc->sc_r_hiwat = 0; 1137 sc->sc_r_lowat = 0; 1138 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1139 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1140 sscom_schedrx(sc); 1141 } 1142 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1143 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1144 sscom_hwiflow(sc); 1145 } 1146 } else { 1147 sc->sc_r_hiwat = sscom_rbuf_hiwat; 1148 sc->sc_r_lowat = sscom_rbuf_lowat; 1149 } 1150 1151 SSCOM_UNLOCK(sc); 1152 splx(s); 1153 1154 /* 1155 * Update the tty layer's idea of the carrier bit, in case we changed 1156 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1157 * explicit request. 1158 */ 1159 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msts, MSTS_DCD)); 1160 1161 if (sscom_debug) 1162 sscomstatus(sc, "sscomparam "); 1163 1164 if (!ISSET(t->c_cflag, CHWFLOW)) { 1165 if (sc->sc_tx_stopped) { 1166 sc->sc_tx_stopped = 0; 1167 sscomstart(tp); 1168 } 1169 } 1170 1171 return 0; 1172 } 1173 1174 static void 1175 sscom_iflush(struct sscom_softc *sc) 1176 { 1177 bus_space_tag_t iot = sc->sc_iot; 1178 bus_space_handle_t ioh = sc->sc_ioh; 1179 int timo; 1180 1181 1182 timo = 50000; 1183 /* flush any pending I/O */ 1184 while ( sscom_rxrdy(iot, ioh) && --timo) 1185 (void)sscom_getc(iot,ioh); 1186 #ifdef DIAGNOSTIC 1187 if (!timo) 1188 printf("%s: sscom_iflush timeout\n", sc->sc_dev.dv_xname); 1189 #endif 1190 } 1191 1192 static void 1193 sscom_loadchannelregs(struct sscom_softc *sc) 1194 { 1195 bus_space_tag_t iot = sc->sc_iot; 1196 bus_space_handle_t ioh = sc->sc_ioh; 1197 1198 /* XXXXX necessary? */ 1199 sscom_iflush(sc); 1200 1201 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1202 1203 #if 0 1204 if (ISSET(sc->sc_hwflags, COM_HW_FLOW)) { 1205 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1206 bus_space_write_1(iot, ioh, com_efr, sc->sc_efr); 1207 } 1208 #endif 1209 1210 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, sc->sc_ubrdiv); 1211 bus_space_write_1(iot, ioh, SSCOM_ULCON, sc->sc_ulcon); 1212 sc->set_modem_control(sc); 1213 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1214 } 1215 1216 static int 1217 sscomhwiflow(struct tty *tp, int block) 1218 { 1219 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1220 int s; 1221 1222 if (SSCOM_ISALIVE(sc) == 0) 1223 return 0; 1224 1225 if (sc->sc_mcr_rts == 0) 1226 return 0; 1227 1228 s = splserial(); 1229 SSCOM_LOCK(sc); 1230 1231 if (block) { 1232 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1233 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1234 sscom_hwiflow(sc); 1235 } 1236 } else { 1237 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1238 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1239 sscom_schedrx(sc); 1240 } 1241 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1242 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1243 sscom_hwiflow(sc); 1244 } 1245 } 1246 1247 SSCOM_UNLOCK(sc); 1248 splx(s); 1249 return 1; 1250 } 1251 1252 /* 1253 * (un)block input via hw flowcontrol 1254 */ 1255 static void 1256 sscom_hwiflow(struct sscom_softc *sc) 1257 { 1258 if (sc->sc_mcr_rts == 0) 1259 return; 1260 1261 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 1262 CLR(sc->sc_umcon, sc->sc_mcr_rts); 1263 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 1264 } else { 1265 SET(sc->sc_umcon, sc->sc_mcr_rts); 1266 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 1267 } 1268 sc->set_modem_control(sc); 1269 } 1270 1271 1272 void 1273 sscomstart(struct tty *tp) 1274 { 1275 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1276 int s; 1277 1278 if (SSCOM_ISALIVE(sc) == 0) 1279 return; 1280 1281 s = spltty(); 1282 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1283 goto out; 1284 if (sc->sc_tx_stopped) 1285 goto out; 1286 1287 if (tp->t_outq.c_cc <= tp->t_lowat) { 1288 if (ISSET(tp->t_state, TS_ASLEEP)) { 1289 CLR(tp->t_state, TS_ASLEEP); 1290 wakeup(&tp->t_outq); 1291 } 1292 selwakeup(&tp->t_wsel); 1293 if (tp->t_outq.c_cc == 0) 1294 goto out; 1295 } 1296 1297 /* Grab the first contiguous region of buffer space. */ 1298 { 1299 u_char *tba; 1300 int tbc; 1301 1302 tba = tp->t_outq.c_cf; 1303 tbc = ndqb(&tp->t_outq, 0); 1304 1305 (void)splserial(); 1306 SSCOM_LOCK(sc); 1307 1308 sc->sc_tba = tba; 1309 sc->sc_tbc = tbc; 1310 } 1311 1312 SET(tp->t_state, TS_BUSY); 1313 sc->sc_tx_busy = 1; 1314 1315 /* Output the first chunk of the contiguous buffer. */ 1316 sscom_output_chunk(sc); 1317 1318 /* Enable transmit completion interrupts if necessary. */ 1319 if ((sc->sc_hwflags & SSCOM_HW_TXINT) == 0) 1320 sscom_enable_txint(sc); 1321 1322 SSCOM_UNLOCK(sc); 1323 out: 1324 splx(s); 1325 return; 1326 } 1327 1328 /* 1329 * Stop output on a line. 1330 */ 1331 void 1332 sscomstop(struct tty *tp, int flag) 1333 { 1334 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1335 int s; 1336 1337 s = splserial(); 1338 SSCOM_LOCK(sc); 1339 if (ISSET(tp->t_state, TS_BUSY)) { 1340 /* Stop transmitting at the next chunk. */ 1341 sc->sc_tbc = 0; 1342 sc->sc_heldtbc = 0; 1343 if (!ISSET(tp->t_state, TS_TTSTOP)) 1344 SET(tp->t_state, TS_FLUSH); 1345 } 1346 SSCOM_UNLOCK(sc); 1347 splx(s); 1348 } 1349 1350 void 1351 sscomdiag(void *arg) 1352 { 1353 struct sscom_softc *sc = arg; 1354 int overflows, floods; 1355 int s; 1356 1357 s = splserial(); 1358 SSCOM_LOCK(sc); 1359 overflows = sc->sc_overflows; 1360 sc->sc_overflows = 0; 1361 floods = sc->sc_floods; 1362 sc->sc_floods = 0; 1363 sc->sc_errors = 0; 1364 SSCOM_UNLOCK(sc); 1365 splx(s); 1366 1367 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1368 sc->sc_dev.dv_xname, 1369 overflows, overflows == 1 ? "" : "s", 1370 floods, floods == 1 ? "" : "s"); 1371 } 1372 1373 integrate void 1374 sscom_rxsoft(struct sscom_softc *sc, struct tty *tp) 1375 { 1376 int (*rint) (int, struct tty *) = tp->t_linesw->l_rint; 1377 u_char *get, *end; 1378 u_int cc, scc; 1379 u_char rsr; 1380 int code; 1381 int s; 1382 1383 end = sc->sc_ebuf; 1384 get = sc->sc_rbget; 1385 scc = cc = sscom_rbuf_size - sc->sc_rbavail; 1386 1387 if (cc == sscom_rbuf_size) { 1388 sc->sc_floods++; 1389 if (sc->sc_errors++ == 0) 1390 callout_reset(&sc->sc_diag_callout, 60 * hz, 1391 sscomdiag, sc); 1392 } 1393 1394 while (cc) { 1395 code = get[0]; 1396 rsr = get[1]; 1397 if (rsr) { 1398 if (ISSET(rsr, UERSTAT_OVERRUN)) { 1399 sc->sc_overflows++; 1400 if (sc->sc_errors++ == 0) 1401 callout_reset(&sc->sc_diag_callout, 1402 60 * hz, sscomdiag, sc); 1403 } 1404 if (ISSET(rsr, UERSTAT_BREAK | UERSTAT_FRAME)) 1405 SET(code, TTY_FE); 1406 if (ISSET(rsr, UERSTAT_PARITY)) 1407 SET(code, TTY_PE); 1408 } 1409 if ((*rint)(code, tp) == -1) { 1410 /* 1411 * The line discipline's buffer is out of space. 1412 */ 1413 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1414 /* 1415 * We're either not using flow control, or the 1416 * line discipline didn't tell us to block for 1417 * some reason. Either way, we have no way to 1418 * know when there's more space available, so 1419 * just drop the rest of the data. 1420 */ 1421 get += cc << 1; 1422 if (get >= end) 1423 get -= sscom_rbuf_size << 1; 1424 cc = 0; 1425 } else { 1426 /* 1427 * Don't schedule any more receive processing 1428 * until the line discipline tells us there's 1429 * space available (through sscomhwiflow()). 1430 * Leave the rest of the data in the input 1431 * buffer. 1432 */ 1433 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1434 } 1435 break; 1436 } 1437 get += 2; 1438 if (get >= end) 1439 get = sc->sc_rbuf; 1440 cc--; 1441 } 1442 1443 if (cc != scc) { 1444 sc->sc_rbget = get; 1445 s = splserial(); 1446 SSCOM_LOCK(sc); 1447 1448 cc = sc->sc_rbavail += scc - cc; 1449 /* Buffers should be ok again, release possible block. */ 1450 if (cc >= sc->sc_r_lowat) { 1451 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1452 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1453 sscom_enable_rxint(sc); 1454 sc->sc_ucon |= UCON_ERRINT; 1455 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, 1456 sc->sc_ucon); 1457 1458 } 1459 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1460 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1461 sscom_hwiflow(sc); 1462 } 1463 } 1464 SSCOM_UNLOCK(sc); 1465 splx(s); 1466 } 1467 } 1468 1469 integrate void 1470 sscom_txsoft(struct sscom_softc *sc, struct tty *tp) 1471 { 1472 1473 CLR(tp->t_state, TS_BUSY); 1474 if (ISSET(tp->t_state, TS_FLUSH)) 1475 CLR(tp->t_state, TS_FLUSH); 1476 else 1477 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1478 (*tp->t_linesw->l_start)(tp); 1479 } 1480 1481 integrate void 1482 sscom_stsoft(struct sscom_softc *sc, struct tty *tp) 1483 { 1484 u_char msr, delta; 1485 int s; 1486 1487 s = splserial(); 1488 SSCOM_LOCK(sc); 1489 msr = sc->sc_msts; 1490 delta = sc->sc_msr_delta; 1491 sc->sc_msr_delta = 0; 1492 SSCOM_UNLOCK(sc); 1493 splx(s); 1494 1495 if (ISSET(delta, sc->sc_msr_dcd)) { 1496 /* 1497 * Inform the tty layer that carrier detect changed. 1498 */ 1499 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSTS_DCD)); 1500 } 1501 1502 if (ISSET(delta, sc->sc_msr_cts)) { 1503 /* Block or unblock output according to flow control. */ 1504 if (ISSET(msr, sc->sc_msr_cts)) { 1505 sc->sc_tx_stopped = 0; 1506 (*tp->t_linesw->l_start)(tp); 1507 } else { 1508 sc->sc_tx_stopped = 1; 1509 } 1510 } 1511 1512 if (sscom_debug) 1513 sscomstatus(sc, "sscom_stsoft"); 1514 } 1515 1516 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1517 void 1518 sscomsoft(void *arg) 1519 { 1520 struct sscom_softc *sc = arg; 1521 struct tty *tp; 1522 1523 if (SSCOM_ISALIVE(sc) == 0) 1524 return; 1525 1526 { 1527 tp = sc->sc_tty; 1528 1529 if (sc->sc_rx_ready) { 1530 sc->sc_rx_ready = 0; 1531 sscom_rxsoft(sc, tp); 1532 } 1533 1534 if (sc->sc_st_check) { 1535 sc->sc_st_check = 0; 1536 sscom_stsoft(sc, tp); 1537 } 1538 1539 if (sc->sc_tx_done) { 1540 sc->sc_tx_done = 0; 1541 sscom_txsoft(sc, tp); 1542 } 1543 } 1544 } 1545 #else 1546 #error sscom needs GENERIC_SOFT_INERRUPTS 1547 #endif 1548 1549 1550 int 1551 sscomintr(void *arg) 1552 { 1553 struct sscom_softc *sc = arg; 1554 bus_space_tag_t iot = sc->sc_iot; 1555 bus_space_handle_t ioh = sc->sc_ioh; 1556 u_char *put, *end; 1557 u_int cc; 1558 1559 if (SSCOM_ISALIVE(sc) == 0) 1560 return 0; 1561 1562 SSCOM_LOCK(sc); 1563 1564 end = sc->sc_ebuf; 1565 put = sc->sc_rbput; 1566 cc = sc->sc_rbavail; 1567 1568 do { 1569 u_char msts, delta; 1570 u_char uerstat; 1571 uint16_t ufstat; 1572 1573 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1574 1575 /* XXX: break interrupt with no character? */ 1576 1577 if ( (ufstat & (UFSTAT_RXCOUNT|UFSTAT_RXFULL)) && 1578 !ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1579 while (cc > 0) { 1580 int cn_trapped = 0; 1581 1582 /* get status and received character. 1583 read status register first */ 1584 uerstat = sscom_geterr(iot, ioh); 1585 put[0] = sscom_getc(iot, ioh); 1586 1587 if (ISSET(uerstat, UERSTAT_BREAK)) { 1588 int cn_trapped = 0; 1589 cn_check_magic(sc->sc_tty->t_dev, 1590 CNC_BREAK, sscom_cnm_state); 1591 if (cn_trapped) 1592 continue; 1593 #if defined(KGDB) 1594 if (ISSET(sc->sc_hwflags, 1595 SSCOM_HW_KGDB)) { 1596 kgdb_connect(1); 1597 continue; 1598 } 1599 #endif 1600 } 1601 1602 put[1] = uerstat; 1603 cn_check_magic(sc->sc_tty->t_dev, 1604 put[0], sscom_cnm_state); 1605 if (!cn_trapped) { 1606 put += 2; 1607 if (put >= end) 1608 put = sc->sc_rbuf; 1609 cc--; 1610 } 1611 1612 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1613 if ( (ufstat & (UFSTAT_RXFULL|UFSTAT_RXCOUNT)) == 0 ) 1614 break; 1615 } 1616 1617 /* 1618 * Current string of incoming characters ended because 1619 * no more data was available or we ran out of space. 1620 * Schedule a receive event if any data was received. 1621 * If we're out of space, turn off receive interrupts. 1622 */ 1623 sc->sc_rbput = put; 1624 sc->sc_rbavail = cc; 1625 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1626 sc->sc_rx_ready = 1; 1627 1628 /* 1629 * See if we are in danger of overflowing a buffer. If 1630 * so, use hardware flow control to ease the pressure. 1631 */ 1632 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1633 cc < sc->sc_r_hiwat) { 1634 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1635 sscom_hwiflow(sc); 1636 } 1637 1638 /* 1639 * If we're out of space, disable receive interrupts 1640 * until the queue has drained a bit. 1641 */ 1642 if (!cc) { 1643 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1644 sscom_disable_rxint(sc); 1645 sc->sc_ucon &= ~UCON_ERRINT; 1646 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1647 } 1648 } 1649 1650 msts = sc->read_modem_status(sc); 1651 delta = msts ^ sc->sc_msts; 1652 sc->sc_msts = msts; 1653 1654 #if 0 1655 /* 1656 * Pulse-per-second (PSS) signals on edge of DCD? 1657 * Process these even if line discipline is ignoring DCD. 1658 */ 1659 if (delta & sc->sc_ppsmask) { 1660 struct timeval tv; 1661 if ((msr & sc->sc_ppsmask) == sc->sc_ppsassert) { 1662 /* XXX nanotime() */ 1663 microtime(&tv); 1664 TIMEVAL_TO_TIMESPEC(&tv, 1665 &sc->ppsinfo.assert_timestamp); 1666 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1667 timespecadd(&sc->ppsinfo.assert_timestamp, 1668 &sc->ppsparam.assert_offset, 1669 &sc->ppsinfo.assert_timestamp); 1670 } 1671 1672 #ifdef PPS_SYNC 1673 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1674 hardpps(&tv, tv.tv_usec); 1675 #endif 1676 sc->ppsinfo.assert_sequence++; 1677 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1678 1679 } else if ((msr & sc->sc_ppsmask) == sc->sc_ppsclear) { 1680 /* XXX nanotime() */ 1681 microtime(&tv); 1682 TIMEVAL_TO_TIMESPEC(&tv, 1683 &sc->ppsinfo.clear_timestamp); 1684 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1685 timespecadd(&sc->ppsinfo.clear_timestamp, 1686 &sc->ppsparam.clear_offset, 1687 &sc->ppsinfo.clear_timestamp); 1688 } 1689 1690 #ifdef PPS_SYNC 1691 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1692 hardpps(&tv, tv.tv_usec); 1693 #endif 1694 sc->ppsinfo.clear_sequence++; 1695 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1696 } 1697 } 1698 #endif 1699 1700 /* 1701 * Process normal status changes 1702 */ 1703 if (ISSET(delta, sc->sc_msr_mask)) { 1704 SET(sc->sc_msr_delta, delta); 1705 1706 /* 1707 * Stop output immediately if we lose the output 1708 * flow control signal or carrier detect. 1709 */ 1710 if (ISSET(~msts, sc->sc_msr_mask)) { 1711 sc->sc_tbc = 0; 1712 sc->sc_heldtbc = 0; 1713 #ifdef SSCOM_DEBUG 1714 if (sscom_debug) 1715 sscomstatus(sc, "sscomintr "); 1716 #endif 1717 } 1718 1719 sc->sc_st_check = 1; 1720 } 1721 1722 /* 1723 * Done handling any receive interrupts. 1724 */ 1725 1726 /* 1727 * If we've delayed a parameter change, do it 1728 * now, and restart * output. 1729 */ 1730 if ((ufstat & UFSTAT_TXCOUNT) == 0) { 1731 /* XXX: we should check transmitter empty also */ 1732 1733 if (sc->sc_heldchange) { 1734 sscom_loadchannelregs(sc); 1735 sc->sc_heldchange = 0; 1736 sc->sc_tbc = sc->sc_heldtbc; 1737 sc->sc_heldtbc = 0; 1738 } 1739 } 1740 1741 1742 /* 1743 * See if data can be transmitted as well. Schedule tx 1744 * done event if no data left and tty was marked busy. 1745 */ 1746 if (!ISSET(ufstat,UFSTAT_TXFULL)) { 1747 /* 1748 * Output the next chunk of the contiguous 1749 * buffer, if any. 1750 */ 1751 if (sc->sc_tbc > 0) { 1752 sscom_output_chunk(sc); 1753 } 1754 else { 1755 /* 1756 * Disable transmit sscompletion 1757 * interrupts if necessary. 1758 */ 1759 if (sc->sc_hwflags & SSCOM_HW_TXINT) 1760 sscom_disable_txint(sc); 1761 if (sc->sc_tx_busy) { 1762 sc->sc_tx_busy = 0; 1763 sc->sc_tx_done = 1; 1764 } 1765 } 1766 } 1767 } while (0); 1768 1769 SSCOM_UNLOCK(sc); 1770 1771 /* Wake up the poller. */ 1772 softintr_schedule(sc->sc_si); 1773 1774 #if NRND > 0 && defined(RND_COM) 1775 rnd_add_uint32(&sc->rnd_source, iir | rsr); 1776 #endif 1777 1778 return 1; 1779 } 1780 1781 1782 #if defined(KGDB) || defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1783 /* 1784 * Initialize UART for use as console or KGDB line. 1785 */ 1786 static int 1787 sscom_init(bus_space_tag_t iot, const struct sscom_uart_info *config, 1788 int rate, int frequency, tcflag_t cflag, bus_space_handle_t *iohp) 1789 { 1790 bus_space_handle_t ioh; 1791 bus_addr_t iobase = config->iobase; 1792 1793 if (bus_space_map(iot, iobase, SSCOM_SIZE, 0, &ioh)) 1794 return ENOMEM; /* ??? */ 1795 1796 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1797 bus_space_write_1(iot, ioh, SSCOM_UFCON, 1798 UFCON_TXTRIGGER_8 | UFCON_RXTRIGGER_8 | 1799 UFCON_TXFIFO_RESET | UFCON_RXFIFO_RESET | 1800 UFCON_FIFO_ENABLE ); 1801 /* tx/rx fifo reset are auto-cleared */ 1802 1803 rate = sscomspeed(rate, frequency); 1804 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, rate); 1805 bus_space_write_2(iot, ioh, SSCOM_ULCON, cflag2lcr(cflag)); 1806 1807 /* enable UART */ 1808 bus_space_write_2(iot, ioh, SSCOM_UCON, 1809 UCON_TXMODE_INT|UCON_RXMODE_INT); 1810 bus_space_write_2(iot, ioh, SSCOM_UMCON, UMCON_RTS); 1811 1812 *iohp = ioh; 1813 return 0; 1814 } 1815 1816 #endif 1817 1818 #if defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1819 /* 1820 * Following are all routines needed for SSCOM to act as console 1821 */ 1822 struct consdev sscomcons = { 1823 NULL, NULL, sscomcngetc, sscomcnputc, sscomcnpollc, NULL, 1824 NULL, NULL, NODEV, CN_NORMAL 1825 }; 1826 1827 1828 int 1829 sscom_cnattach(bus_space_tag_t iot, const struct sscom_uart_info *config, 1830 int rate, int frequency, tcflag_t cflag) 1831 { 1832 int res; 1833 1834 res = sscom_init(iot, config, rate, frequency, cflag, &sscomconsioh); 1835 if (res) 1836 return res; 1837 1838 cn_tab = &sscomcons; 1839 cn_init_magic(&sscom_cnm_state); 1840 cn_set_magic("\047\001"); /* default magic is BREAK */ 1841 1842 sscomconstag = iot; 1843 sscomconsunit = config->unit; 1844 sscomconsrate = rate; 1845 sscomconscflag = cflag; 1846 1847 return 0; 1848 } 1849 1850 void 1851 sscom_cndetach(void) 1852 { 1853 bus_space_unmap(sscomconstag, sscomconsioh, SSCOM_SIZE); 1854 sscomconstag = NULL; 1855 1856 cn_tab = NULL; 1857 } 1858 1859 /* 1860 * The read-ahead code is so that you can detect pending in-band 1861 * cn_magic in polled mode while doing output rather than having to 1862 * wait until the kernel decides it needs input. 1863 */ 1864 1865 #define MAX_READAHEAD 20 1866 static int sscom_readahead[MAX_READAHEAD]; 1867 static int sscom_readaheadcount = 0; 1868 1869 int 1870 sscomcngetc(dev_t dev) 1871 { 1872 int s = splserial(); 1873 u_char stat, c; 1874 1875 /* got a character from reading things earlier */ 1876 if (sscom_readaheadcount > 0) { 1877 int i; 1878 1879 c = sscom_readahead[0]; 1880 for (i = 1; i < sscom_readaheadcount; i++) { 1881 sscom_readahead[i-1] = sscom_readahead[i]; 1882 } 1883 sscom_readaheadcount--; 1884 splx(s); 1885 return c; 1886 } 1887 1888 /* block until a character becomes available */ 1889 while (!sscom_rxrdy(sscomconstag, sscomconsioh)) 1890 ; 1891 1892 c = sscom_getc(sscomconstag, sscomconsioh); 1893 stat = sscom_geterr(sscomconstag, sscomconsioh); 1894 { 1895 int cn_trapped = 0; /* unused */ 1896 #ifdef DDB 1897 extern int db_active; 1898 if (!db_active) 1899 #endif 1900 cn_check_magic(dev, c, sscom_cnm_state); 1901 } 1902 splx(s); 1903 return c; 1904 } 1905 1906 /* 1907 * Console kernel output character routine. 1908 */ 1909 void 1910 sscomcnputc(dev_t dev, int c) 1911 { 1912 int s = splserial(); 1913 int timo; 1914 1915 int cin, stat; 1916 if (sscom_readaheadcount < MAX_READAHEAD && 1917 sscom_rxrdy(sscomconstag, sscomconsioh)) { 1918 1919 int cn_trapped = 0; 1920 cin = sscom_getc(sscomconstag, sscomconsioh); 1921 stat = sscom_geterr(sscomconstag, sscomconsioh); 1922 cn_check_magic(dev, cin, sscom_cnm_state); 1923 sscom_readahead[sscom_readaheadcount++] = cin; 1924 } 1925 1926 /* wait for any pending transmission to finish */ 1927 timo = 150000; 1928 while (ISSET(bus_space_read_2(sscomconstag, sscomconsioh, SSCOM_UFSTAT), 1929 UFSTAT_TXFULL) && --timo) 1930 continue; 1931 1932 bus_space_write_1(sscomconstag, sscomconsioh, SSCOM_UTXH, c); 1933 SSCOM_BARRIER(sscomconstag, sscomconsioh, BR | BW); 1934 1935 #if 0 1936 /* wait for this transmission to complete */ 1937 timo = 1500000; 1938 while (!ISSET(bus_space_read_1(sscomconstag, sscomconsioh, SSCOM_UTRSTAT), 1939 UTRSTAT_TXEMPTY) && --timo) 1940 continue; 1941 #endif 1942 splx(s); 1943 } 1944 1945 void 1946 sscomcnpollc(dev_t dev, int on) 1947 { 1948 1949 } 1950 1951 #endif /* SSCOM0CONSOLE||SSCOM1CONSOLE */ 1952 1953 #ifdef KGDB 1954 int 1955 sscom_kgdb_attach(bus_space_tag_t iot, const struct sscom_uart_info *config, 1956 int rate, int frequency, tcflag_t cflag) 1957 { 1958 int res; 1959 1960 if (iot == sscomconstag && config->unit == sscomconsunit) { 1961 printf( "console==kgdb_port (%d): kgdb disabled\n", sscomconsunit); 1962 return EBUSY; /* cannot share with console */ 1963 } 1964 1965 res = sscom_init(iot, config, rate, frequency, cflag, &sscom_kgdb_ioh); 1966 if (res) 1967 return res; 1968 1969 kgdb_attach(sscom_kgdb_getc, sscom_kgdb_putc, NULL); 1970 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1971 1972 sscom_kgdb_iot = iot; 1973 sscom_kgdb_unit = config->unit; 1974 1975 return 0; 1976 } 1977 1978 /* ARGSUSED */ 1979 int 1980 sscom_kgdb_getc(void *arg) 1981 { 1982 int c, stat; 1983 1984 /* block until a character becomes available */ 1985 while (!sscom_rxrdy(sscom_kgdb_iot, sscom_kgdb_ioh)) 1986 ; 1987 1988 c = sscom_getc(sscom_kgdb_iot, sscom_kgdb_ioh); 1989 stat = sscom_geterr(sscom_kgdb_iot, sscom_kgdb_ioh); 1990 1991 return c; 1992 } 1993 1994 /* ARGSUSED */ 1995 void 1996 sscom_kgdb_putc(void *arg, int c) 1997 { 1998 int timo; 1999 2000 /* wait for any pending transmission to finish */ 2001 timo = 150000; 2002 while (ISSET(bus_space_read_2(sscom_kgdb_iot, sscom_kgdb_ioh, 2003 SSCOM_UFSTAT), UFSTAT_TXFULL) && --timo) 2004 continue; 2005 2006 bus_space_write_1(sscom_kgdb_iot, sscom_kgdb_ioh, SSCOM_UTXH, c); 2007 SSCOM_BARRIER(sscom_kgdb_iot, sscom_kgdb_ioh, BR | BW); 2008 2009 #if 0 2010 /* wait for this transmission to complete */ 2011 timo = 1500000; 2012 while (!ISSET(bus_space_read_1(sscom_kgdb_iot, sscom_kgdb_ioh, 2013 SSCOM_UTRSTAT), UTRSTAT_TXEMPTY) && --timo) 2014 continue; 2015 #endif 2016 } 2017 #endif /* KGDB */ 2018 2019 /* helper function to identify the sscom ports used by 2020 console or KGDB (and not yet autoconf attached) */ 2021 int 2022 sscom_is_console(bus_space_tag_t iot, int unit, 2023 bus_space_handle_t *ioh) 2024 { 2025 bus_space_handle_t help; 2026 2027 if (!sscomconsattached && 2028 iot == sscomconstag && unit == sscomconsunit) 2029 help = sscomconsioh; 2030 #ifdef KGDB 2031 else if (!sscom_kgdb_attached && 2032 iot == sscom_kgdb_iot && unit == sscom_kgdb_unit) 2033 help = sscom_kgdb_ioh; 2034 #endif 2035 else 2036 return 0; 2037 2038 if (ioh) 2039 *ioh = help; 2040 return 1; 2041 } 2042
Indexes created Sun Sep 28 07:09:56 GMT 2025