sscom.c revision 1.5
1 /* $NetBSD: sscom.c,v 1.5 2003/06/23 11:01:08 martin 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 "opt_sscom.h" 112 #include "opt_ddb.h" 113 #include "opt_kgdb.h" 114 #include "opt_multiprocessor.h" 115 #include "opt_lockdebug.h" 116 117 #include "rnd.h" 118 #if NRND > 0 && defined(RND_COM) 119 #include <sys/rnd.h> 120 #endif 121 122 /* 123 * Override cnmagic(9) macro before including <sys/systm.h>. 124 * We need to know if cn_check_magic triggered debugger, so set a flag. 125 * Callers of cn_check_magic must declare int cn_trapped = 0; 126 * XXX: this is *ugly*! 127 */ 128 #define cn_trap() \ 129 do { \ 130 console_debugger(); \ 131 cn_trapped = 1; \ 132 } while (/* CONSTCOND */ 0) 133 134 #include <sys/param.h> 135 #include <sys/systm.h> 136 #include <sys/ioctl.h> 137 #include <sys/select.h> 138 #include <sys/tty.h> 139 #include <sys/proc.h> 140 #include <sys/user.h> 141 #include <sys/conf.h> 142 #include <sys/file.h> 143 #include <sys/uio.h> 144 #include <sys/kernel.h> 145 #include <sys/syslog.h> 146 #include <sys/types.h> 147 #include <sys/device.h> 148 #include <sys/malloc.h> 149 #include <sys/timepps.h> 150 #include <sys/vnode.h> 151 152 #include <machine/intr.h> 153 #include <machine/bus.h> 154 155 #include <arm/s3c2xx0/s3c2xx0reg.h> 156 #include <arm/s3c2xx0/s3c2xx0var.h> 157 #include <arm/s3c2xx0/sscom_var.h> 158 #include <dev/cons.h> 159 160 dev_type_open(sscomopen); 161 dev_type_close(sscomclose); 162 dev_type_read(sscomread); 163 dev_type_write(sscomwrite); 164 dev_type_ioctl(sscomioctl); 165 dev_type_stop(sscomstop); 166 dev_type_tty(sscomtty); 167 dev_type_poll(sscompoll); 168 169 int sscomcngetc (dev_t); 170 void sscomcnputc (dev_t, int); 171 void sscomcnpollc (dev_t, int); 172 173 #define integrate static inline 174 void sscomsoft (void *); 175 176 integrate void sscom_rxsoft (struct sscom_softc *, struct tty *); 177 integrate void sscom_txsoft (struct sscom_softc *, struct tty *); 178 integrate void sscom_stsoft (struct sscom_softc *, struct tty *); 179 integrate void sscom_schedrx (struct sscom_softc *); 180 static void sscom_modem(struct sscom_softc *, int); 181 static void sscom_break(struct sscom_softc *, int); 182 static void sscom_iflush(struct sscom_softc *); 183 static void sscom_hwiflow(struct sscom_softc *); 184 static void sscom_loadchannelregs(struct sscom_softc *); 185 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 186 static int sscom_to_tiocm(struct sscom_softc *); 187 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 188 static int sscom_to_tiocm(struct sscom_softc *); 189 static void sscom_iflush(struct sscom_softc *); 190 191 static int sscomhwiflow(struct tty *tp, int block); 192 static int sscom_init(bus_space_tag_t, const struct sscom_uart_info *, 193 int, int, tcflag_t, bus_space_handle_t *); 194 195 extern struct cfdriver sscom_cd; 196 197 const struct cdevsw sscom_cdevsw = { 198 sscomopen, sscomclose, sscomread, sscomwrite, sscomioctl, 199 sscomstop, sscomtty, sscompoll, nommap, ttykqfilter, D_TTY 200 }; 201 202 /* 203 * Make this an option variable one can patch. 204 * But be warned: this must be a power of 2! 205 */ 206 u_int sscom_rbuf_size = SSCOM_RING_SIZE; 207 208 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 209 u_int sscom_rbuf_hiwat = (SSCOM_RING_SIZE * 1) / 4; 210 u_int sscom_rbuf_lowat = (SSCOM_RING_SIZE * 3) / 4; 211 212 static int sscomconsunit = -1; 213 static bus_space_tag_t sscomconstag; 214 static bus_space_handle_t sscomconsioh; 215 static int sscomconsattached; 216 static int sscomconsrate; 217 static tcflag_t sscomconscflag; 218 static struct cnm_state sscom_cnm_state; 219 220 #ifdef KGDB 221 #include <sys/kgdb.h> 222 223 static int sscom_kgdb_unit = -1; 224 static bus_space_tag_t sscom_kgdb_iot; 225 static bus_space_handle_t sscom_kgdb_ioh; 226 static int sscom_kgdb_attached; 227 228 int sscom_kgdb_getc (void *); 229 void sscom_kgdb_putc (void *, int); 230 #endif /* KGDB */ 231 232 #define SSCOMUNIT_MASK 0x7f 233 #define SSCOMDIALOUT_MASK 0x80 234 235 #define SSCOMUNIT(x) (minor(x) & SSCOMUNIT_MASK) 236 #define SSCOMDIALOUT(x) (minor(x) & SSCOMDIALOUT_MASK) 237 238 #if 0 239 #define SSCOM_ISALIVE(sc) ((sc)->enabled != 0 && \ 240 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 241 #else 242 #define SSCOM_ISALIVE(sc) ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE) 243 #endif 244 245 #define BR BUS_SPACE_BARRIER_READ 246 #define BW BUS_SPACE_BARRIER_WRITE 247 #define SSCOM_BARRIER(t, h, f) /* no-op */ 248 249 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 250 251 #define SSCOM_LOCK(sc) simple_lock(&(sc)->sc_lock) 252 #define SSCOM_UNLOCK(sc) simple_unlock(&(sc)->sc_lock) 253 254 #else 255 256 #define SSCOM_LOCK(sc) 257 #define SSCOM_UNLOCK(sc) 258 259 #endif 260 261 #ifndef SSCOM_TOLERANCE 262 #define SSCOM_TOLERANCE 30 /* XXX: baud rate tolerance, in 0.1% units */ 263 #endif 264 265 /* value for UCON */ 266 #define UCON_RXINT_MASK \ 267 (UCON_RXMODE_MASK|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE) 268 #define UCON_RXINT_ENABLE \ 269 (UCON_RXMODE_INT|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE_LEVEL) 270 #define UCON_TXINT_MASK (UCON_TXMODE_MASK|UCON_TXINT_TYPE) 271 #define UCON_TXINT_ENABLE (UCON_TXMODE_INT|UCON_TXINT_TYPE_LEVEL) 272 273 /* we don't want tx interrupt on debug port, but it is needed to 274 have transmitter active */ 275 #define UCON_DEBUGPORT (UCON_RXINT_ENABLE|UCON_TXINT_ENABLE) 276 277 278 static __inline void 279 sscom_output_chunk( struct sscom_softc *sc ) 280 { 281 int n, space; 282 bus_space_tag_t iot = sc->sc_iot; 283 bus_space_handle_t ioh = sc->sc_ioh; 284 285 n = sc->sc_tbc; 286 space = 16 - ((bus_space_read_2(iot, ioh, SSCOM_UFSTAT) & 287 UFSTAT_TXCOUNT) >> UFSTAT_TXCOUNT_SHIFT); 288 289 if (n > space) 290 n = space; 291 292 if (n > 0) { 293 bus_space_write_multi_1(iot, ioh, SSCOM_UTXH, sc->sc_tba, n); 294 sc->sc_tbc -= n; 295 sc->sc_tba += n; 296 } 297 } 298 299 300 301 int 302 sscomspeed(long speed, long frequency) 303 { 304 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 305 306 int x, err; 307 308 if (speed <= 0) 309 return -1; 310 x = divrnd(frequency / 16, speed); 311 if (x <= 0) 312 return -1; 313 err = divrnd(((quad_t)frequency) * 1000 / 16, speed * x) - 1000; 314 if (err < 0) 315 err = -err; 316 if (err > SSCOM_TOLERANCE) 317 return -1; 318 return x-1; 319 320 #undef divrnd 321 } 322 323 void sscomstatus (struct sscom_softc *, char *); 324 325 #ifdef SSCOM_DEBUG 326 int sscom_debug = 0; 327 328 void 329 sscomstatus(struct sscom_softc *sc, char *str) 330 { 331 struct tty *tp = sc->sc_tty; 332 int umstat = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMSTAT); 333 int umcon = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMCON); 334 335 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 336 sc->sc_dev.dv_xname, str, 337 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 338 "+", /* DCD */ 339 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 340 "+", /* DTR */ 341 sc->sc_tx_stopped ? "+" : "-"); 342 343 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 344 sc->sc_dev.dv_xname, str, 345 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 346 ISSET(umstat, UMSTAT_CTS) ? "+" : "-", 347 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 348 ISSET(umcon, UMCON_RTS) ? "+" : "-", 349 sc->sc_rx_flags); 350 } 351 #else 352 #define sscom_debug 0 353 #endif 354 355 static void 356 sscom_enable_debugport(struct sscom_softc *sc) 357 { 358 int s; 359 360 /* Turn on line break interrupt, set carrier. */ 361 s = splserial(); 362 SSCOM_LOCK(sc); 363 sc->sc_ucon = UCON_DEBUGPORT; 364 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 365 sc->sc_umcon = UMCON_RTS|UMCON_DTR; 366 sc->set_modem_control(sc); 367 sscom_enable_rxint(sc); 368 sscom_disable_txint(sc); 369 SSCOM_UNLOCK(sc); 370 splx(s); 371 } 372 373 static void 374 sscom_set_modem_control(struct sscom_softc *sc) 375 { 376 /* flob RTS */ 377 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 378 SSCOM_UMCON, sc->sc_umcon & UMCON_HW_MASK); 379 /* ignore DTR */ 380 } 381 382 static int 383 sscom_read_modem_status(struct sscom_softc *sc) 384 { 385 int msts; 386 387 msts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SSCOM_UMSTAT); 388 389 /* DCD and DSR are always on */ 390 return (msts & UMSTAT_CTS) | MSTS_DCD | MSTS_DSR; 391 } 392 393 void 394 sscom_attach_subr(struct sscom_softc *sc) 395 { 396 int unit = sc->sc_unit; 397 bus_space_tag_t iot = sc->sc_iot; 398 bus_space_handle_t ioh = sc->sc_ioh; 399 struct tty *tp; 400 401 callout_init(&sc->sc_diag_callout); 402 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 403 simple_lock_init(&sc->sc_lock); 404 #endif 405 406 sc->sc_ucon = UCON_RXINT_ENABLE|UCON_TXINT_ENABLE; 407 408 /* 409 * set default for modem control hook 410 */ 411 if (sc->set_modem_control == NULL) 412 sc->set_modem_control = sscom_set_modem_control; 413 if (sc->read_modem_status == NULL) 414 sc->read_modem_status = sscom_read_modem_status; 415 416 /* Disable interrupts before configuring the device. */ 417 sscom_disable_txrxint(sc); 418 419 #ifdef KGDB 420 /* 421 * Allow kgdb to "take over" this port. If this is 422 * the kgdb device, it has exclusive use. 423 */ 424 if (unit == sscom_kgdb_unit) { 425 SET(sc->sc_hwflags, SSCOM_HW_KGDB); 426 sc->sc_ucon = UCON_DEBUGPORT; 427 } 428 #endif 429 430 if (unit == sscomconsunit) { 431 sscomconsattached = 1; 432 433 sscomconstag = iot; 434 sscomconsioh = ioh; 435 436 /* Make sure the console is always "hardwired". */ 437 delay(1000); /* XXX: wait for output to finish */ 438 SET(sc->sc_hwflags, SSCOM_HW_CONSOLE); 439 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 440 441 sc->sc_ucon = UCON_DEBUGPORT; 442 } 443 444 bus_space_write_1(iot, ioh, SSCOM_UFCON, 445 UFCON_TXTRIGGER_8|UFCON_RXTRIGGER_8|UFCON_FIFO_ENABLE| 446 UFCON_TXFIFO_RESET|UFCON_RXFIFO_RESET); 447 448 bus_space_write_1(iot, ioh, SSCOM_UCON, sc->sc_ucon); 449 450 #ifdef KGDB 451 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) { 452 sscom_kgdb_attached = 1; 453 printf("%s: kgdb\n", sc->sc_dev.dv_xname); 454 sscom_enable_debugport(sc); 455 return; 456 } 457 #endif 458 459 460 461 tp = ttymalloc(); 462 tp->t_oproc = sscomstart; 463 tp->t_param = sscomparam; 464 tp->t_hwiflow = sscomhwiflow; 465 466 sc->sc_tty = tp; 467 sc->sc_rbuf = malloc(sscom_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 468 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 469 sc->sc_rbavail = sscom_rbuf_size; 470 if (sc->sc_rbuf == NULL) { 471 printf("%s: unable to allocate ring buffer\n", 472 sc->sc_dev.dv_xname); 473 return; 474 } 475 sc->sc_ebuf = sc->sc_rbuf + (sscom_rbuf_size << 1); 476 477 tty_attach(tp); 478 479 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 480 int maj; 481 482 /* locate the major number */ 483 maj = cdevsw_lookup_major(&sscom_cdevsw); 484 485 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 486 487 printf("%s: console (major=%d)\n", sc->sc_dev.dv_xname, maj); 488 } 489 490 491 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sscomsoft, sc); 492 493 #if NRND > 0 && defined(RND_COM) 494 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 495 RND_TYPE_TTY, 0); 496 #endif 497 498 /* if there are no enable/disable functions, assume the device 499 is always enabled */ 500 501 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 502 sscom_enable_debugport(sc); 503 else 504 sscom_disable_txrxint(sc); 505 506 SET(sc->sc_hwflags, SSCOM_HW_DEV_OK); 507 } 508 509 int 510 sscom_detach(struct device *self, int flags) 511 { 512 return 0; 513 } 514 515 int 516 sscom_activate(struct device *self, enum devact act) 517 { 518 #ifdef notyet 519 struct sscom_softc *sc = (struct sscom_softc *)self; 520 int s, rv = 0; 521 522 s = splserial(); 523 SSCOM_LOCK(sc); 524 switch (act) { 525 case DVACT_ACTIVATE: 526 rv = EOPNOTSUPP; 527 break; 528 529 case DVACT_DEACTIVATE: 530 if (sc->sc_hwflags & (SSCOM_HW_CONSOLE|SSCOM_HW_KGDB)) { 531 rv = EBUSY; 532 break; 533 } 534 535 sc->enabled = 0; 536 break; 537 } 538 539 SSCOM_UNLOCK(sc); 540 splx(s); 541 return rv; 542 #else 543 return 0; 544 #endif 545 } 546 547 void 548 sscom_shutdown(struct sscom_softc *sc) 549 { 550 #ifdef notyet 551 struct tty *tp = sc->sc_tty; 552 int s; 553 554 s = splserial(); 555 SSCOM_LOCK(sc); 556 557 /* If we were asserting flow control, then deassert it. */ 558 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 559 sscom_hwiflow(sc); 560 561 /* Clear any break condition set with TIOCSBRK. */ 562 sscom_break(sc, 0); 563 564 /* 565 * Hang up if necessary. Wait a bit, so the other side has time to 566 * notice even if we immediately open the port again. 567 * Avoid tsleeping above splhigh(). 568 */ 569 if (ISSET(tp->t_cflag, HUPCL)) { 570 sscom_modem(sc, 0); 571 SSCOM_UNLOCK(sc); 572 splx(s); 573 /* XXX tsleep will only timeout */ 574 (void) tsleep(sc, TTIPRI, ttclos, hz); 575 s = splserial(); 576 SSCOM_LOCK(sc); 577 } 578 579 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 580 /* interrupt on break */ 581 sc->sc_ucon = UCON_DEBUGPORT; 582 else 583 sc->sc_ucon = 0; 584 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 585 586 #ifdef DIAGNOSTIC 587 if (!sc->enabled) 588 panic("sscom_shutdown: not enabled?"); 589 #endif 590 sc->enabled = 0; 591 SSCOM_UNLOCK(sc); 592 splx(s); 593 #endif 594 } 595 596 int 597 sscomopen(dev_t dev, int flag, int mode, struct proc *p) 598 { 599 struct sscom_softc *sc; 600 struct tty *tp; 601 int s, s2; 602 int error; 603 604 sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 605 if (sc == NULL || !ISSET(sc->sc_hwflags, SSCOM_HW_DEV_OK) || 606 sc->sc_rbuf == NULL) 607 return ENXIO; 608 609 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 610 return ENXIO; 611 612 #ifdef KGDB 613 /* 614 * If this is the kgdb port, no other use is permitted. 615 */ 616 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) 617 return EBUSY; 618 #endif 619 620 tp = sc->sc_tty; 621 622 if (ISSET(tp->t_state, TS_ISOPEN) && 623 ISSET(tp->t_state, TS_XCLUDE) && 624 p->p_ucred->cr_uid != 0) 625 return EBUSY; 626 627 s = spltty(); 628 629 /* 630 * Do the following iff this is a first open. 631 */ 632 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 633 struct termios t; 634 635 tp->t_dev = dev; 636 637 s2 = splserial(); 638 SSCOM_LOCK(sc); 639 640 /* Turn on interrupts. */ 641 sscom_enable_txrxint(sc); 642 643 /* Fetch the current modem control status, needed later. */ 644 sc->sc_msts = sc->read_modem_status(sc); 645 646 #if 0 647 /* Clear PPS capture state on first open. */ 648 sc->sc_ppsmask = 0; 649 sc->ppsparam.mode = 0; 650 #endif 651 652 SSCOM_UNLOCK(sc); 653 splx(s2); 654 655 /* 656 * Initialize the termios status to the defaults. Add in the 657 * sticky bits from TIOCSFLAGS. 658 */ 659 t.c_ispeed = 0; 660 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 661 t.c_ospeed = sscomconsrate; 662 t.c_cflag = sscomconscflag; 663 } else { 664 t.c_ospeed = TTYDEF_SPEED; 665 t.c_cflag = TTYDEF_CFLAG; 666 } 667 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 668 SET(t.c_cflag, CLOCAL); 669 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 670 SET(t.c_cflag, CRTSCTS); 671 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 672 SET(t.c_cflag, MDMBUF); 673 /* Make sure sscomparam() will do something. */ 674 tp->t_ospeed = 0; 675 (void) sscomparam(tp, &t); 676 tp->t_iflag = TTYDEF_IFLAG; 677 tp->t_oflag = TTYDEF_OFLAG; 678 tp->t_lflag = TTYDEF_LFLAG; 679 ttychars(tp); 680 ttsetwater(tp); 681 682 s2 = splserial(); 683 SSCOM_LOCK(sc); 684 685 /* 686 * Turn on DTR. We must always do this, even if carrier is not 687 * present, because otherwise we'd have to use TIOCSDTR 688 * immediately after setting CLOCAL, which applications do not 689 * expect. We always assert DTR while the device is open 690 * unless explicitly requested to deassert it. 691 */ 692 sscom_modem(sc, 1); 693 694 /* Clear the input ring, and unblock. */ 695 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 696 sc->sc_rbavail = sscom_rbuf_size; 697 sscom_iflush(sc); 698 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 699 sscom_hwiflow(sc); 700 701 if (sscom_debug) 702 sscomstatus(sc, "sscomopen "); 703 704 SSCOM_UNLOCK(sc); 705 splx(s2); 706 } 707 708 splx(s); 709 710 error = ttyopen(tp, SSCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 711 if (error) 712 goto bad; 713 714 error = (*tp->t_linesw->l_open)(dev, tp); 715 if (error) 716 goto bad; 717 718 return 0; 719 720 bad: 721 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 722 /* 723 * We failed to open the device, and nobody else had it opened. 724 * Clean up the state as appropriate. 725 */ 726 sscom_shutdown(sc); 727 } 728 729 return error; 730 } 731 732 int 733 sscomclose(dev_t dev, int flag, int mode, struct proc *p) 734 { 735 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 736 struct tty *tp = sc->sc_tty; 737 738 /* XXX This is for cons.c. */ 739 if (!ISSET(tp->t_state, TS_ISOPEN)) 740 return 0; 741 742 (*tp->t_linesw->l_close)(tp, flag); 743 ttyclose(tp); 744 745 if (SSCOM_ISALIVE(sc) == 0) 746 return 0; 747 748 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 749 /* 750 * Although we got a last close, the device may still be in 751 * use; e.g. if this was the dialout node, and there are still 752 * processes waiting for carrier on the non-dialout node. 753 */ 754 sscom_shutdown(sc); 755 } 756 757 return 0; 758 } 759 760 int 761 sscomread(dev_t dev, struct uio *uio, int flag) 762 { 763 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 764 struct tty *tp = sc->sc_tty; 765 766 if (SSCOM_ISALIVE(sc) == 0) 767 return EIO; 768 769 return (*tp->t_linesw->l_read)(tp, uio, flag); 770 } 771 772 int 773 sscomwrite(dev_t dev, struct uio *uio, int flag) 774 { 775 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 776 struct tty *tp = sc->sc_tty; 777 778 if (SSCOM_ISALIVE(sc) == 0) 779 return EIO; 780 781 return (*tp->t_linesw->l_write)(tp, uio, flag); 782 } 783 784 int 785 sscompoll(dev_t dev, int events, struct proc *p) 786 { 787 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 788 struct tty *tp = sc->sc_tty; 789 790 if (SSCOM_ISALIVE(sc) == 0) 791 return EIO; 792 793 return (*tp->t_linesw->l_poll)(tp, events, p); 794 } 795 796 struct tty * 797 sscomtty(dev_t dev) 798 { 799 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 800 struct tty *tp = sc->sc_tty; 801 802 return tp; 803 } 804 805 int 806 sscomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 807 { 808 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 809 struct tty *tp = sc->sc_tty; 810 int error; 811 int s; 812 813 if (SSCOM_ISALIVE(sc) == 0) 814 return EIO; 815 816 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 817 if (error != EPASSTHROUGH) 818 return error; 819 820 error = ttioctl(tp, cmd, data, flag, p); 821 if (error != EPASSTHROUGH) 822 return error; 823 824 error = 0; 825 826 s = splserial(); 827 SSCOM_LOCK(sc); 828 829 switch (cmd) { 830 case TIOCSBRK: 831 sscom_break(sc, 1); 832 break; 833 834 case TIOCCBRK: 835 sscom_break(sc, 0); 836 break; 837 838 case TIOCSDTR: 839 sscom_modem(sc, 1); 840 break; 841 842 case TIOCCDTR: 843 sscom_modem(sc, 0); 844 break; 845 846 case TIOCGFLAGS: 847 *(int *)data = sc->sc_swflags; 848 break; 849 850 case TIOCSFLAGS: 851 error = suser(p->p_ucred, &p->p_acflag); 852 if (error) 853 break; 854 sc->sc_swflags = *(int *)data; 855 break; 856 857 case TIOCMSET: 858 case TIOCMBIS: 859 case TIOCMBIC: 860 tiocm_to_sscom(sc, cmd, *(int *)data); 861 break; 862 863 case TIOCMGET: 864 *(int *)data = sscom_to_tiocm(sc); 865 break; 866 867 default: 868 error = EPASSTHROUGH; 869 break; 870 } 871 872 SSCOM_UNLOCK(sc); 873 splx(s); 874 875 if (sscom_debug) 876 sscomstatus(sc, "sscomioctl "); 877 878 return error; 879 } 880 881 integrate void 882 sscom_schedrx(struct sscom_softc *sc) 883 { 884 885 sc->sc_rx_ready = 1; 886 887 /* Wake up the poller. */ 888 softintr_schedule(sc->sc_si); 889 } 890 891 static void 892 sscom_break(struct sscom_softc *sc, int onoff) 893 { 894 895 if (onoff) 896 SET(sc->sc_ucon, UCON_SBREAK); 897 else 898 CLR(sc->sc_ucon, UCON_SBREAK); 899 900 if (!sc->sc_heldchange) { 901 if (sc->sc_tx_busy) { 902 sc->sc_heldtbc = sc->sc_tbc; 903 sc->sc_tbc = 0; 904 sc->sc_heldchange = 1; 905 } else 906 sscom_loadchannelregs(sc); 907 } 908 } 909 910 static void 911 sscom_modem(struct sscom_softc *sc, int onoff) 912 { 913 if (onoff) 914 SET(sc->sc_umcon, UMCON_DTR); 915 else 916 CLR(sc->sc_umcon, UMCON_DTR); 917 918 if (!sc->sc_heldchange) { 919 if (sc->sc_tx_busy) { 920 sc->sc_heldtbc = sc->sc_tbc; 921 sc->sc_tbc = 0; 922 sc->sc_heldchange = 1; 923 } else 924 sscom_loadchannelregs(sc); 925 } 926 } 927 928 static void 929 tiocm_to_sscom(struct sscom_softc *sc, u_long how, int ttybits) 930 { 931 u_char sscombits; 932 933 sscombits = 0; 934 if (ISSET(ttybits, TIOCM_DTR)) 935 sscombits = UMCON_DTR; 936 if (ISSET(ttybits, TIOCM_RTS)) 937 SET(sscombits, UMCON_RTS); 938 939 switch (how) { 940 case TIOCMBIC: 941 CLR(sc->sc_umcon, sscombits); 942 break; 943 944 case TIOCMBIS: 945 SET(sc->sc_umcon, sscombits); 946 break; 947 948 case TIOCMSET: 949 CLR(sc->sc_umcon, UMCON_DTR|UMCON_RTS); 950 SET(sc->sc_umcon, sscombits); 951 break; 952 } 953 954 if (!sc->sc_heldchange) { 955 if (sc->sc_tx_busy) { 956 sc->sc_heldtbc = sc->sc_tbc; 957 sc->sc_tbc = 0; 958 sc->sc_heldchange = 1; 959 } else 960 sscom_loadchannelregs(sc); 961 } 962 } 963 964 static int 965 sscom_to_tiocm(struct sscom_softc *sc) 966 { 967 u_char sscombits; 968 int ttybits = 0; 969 970 sscombits = sc->sc_umcon; 971 #if 0 972 if (ISSET(sscombits, MCR_DTR)) 973 SET(ttybits, TIOCM_DTR); 974 #endif 975 if (ISSET(sscombits, UMCON_RTS)) 976 SET(ttybits, TIOCM_RTS); 977 978 sscombits = sc->sc_msts; 979 if (ISSET(sscombits, MSTS_DCD)) 980 SET(ttybits, TIOCM_CD); 981 if (ISSET(sscombits, MSTS_DSR)) 982 SET(ttybits, TIOCM_DSR); 983 if (ISSET(sscombits, MSTS_CTS)) 984 SET(ttybits, TIOCM_CTS); 985 986 if (sc->sc_ucon != 0) 987 SET(ttybits, TIOCM_LE); 988 989 return ttybits; 990 } 991 992 static int 993 cflag2lcr(tcflag_t cflag) 994 { 995 u_char lcr = ULCON_PARITY_NONE; 996 997 switch (cflag & (PARENB|PARODD)) { 998 case PARENB|PARODD: lcr = ULCON_PARITY_ODD; break; 999 case PARENB: lcr = ULCON_PARITY_EVEN; 1000 } 1001 1002 switch (ISSET(cflag, CSIZE)) { 1003 case CS5: 1004 SET(lcr, ULCON_LENGTH_5); 1005 break; 1006 case CS6: 1007 SET(lcr, ULCON_LENGTH_6); 1008 break; 1009 case CS7: 1010 SET(lcr, ULCON_LENGTH_7); 1011 break; 1012 case CS8: 1013 SET(lcr, ULCON_LENGTH_8); 1014 break; 1015 } 1016 if (ISSET(cflag, CSTOPB)) 1017 SET(lcr, ULCON_STOP); 1018 1019 return lcr; 1020 } 1021 1022 int 1023 sscomparam(struct tty *tp, struct termios *t) 1024 { 1025 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1026 int ospeed; 1027 u_char lcr; 1028 int s; 1029 1030 if (SSCOM_ISALIVE(sc) == 0) 1031 return EIO; 1032 1033 ospeed = sscomspeed(t->c_ospeed, sc->sc_frequency); 1034 1035 /* Check requested parameters. */ 1036 if (ospeed < 0) 1037 return EINVAL; 1038 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1039 return EINVAL; 1040 1041 /* 1042 * For the console, always force CLOCAL and !HUPCL, so that the port 1043 * is always active. 1044 */ 1045 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 1046 ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 1047 SET(t->c_cflag, CLOCAL); 1048 CLR(t->c_cflag, HUPCL); 1049 } 1050 1051 /* 1052 * If there were no changes, don't do anything. This avoids dropping 1053 * input and improves performance when all we did was frob things like 1054 * VMIN and VTIME. 1055 */ 1056 if (tp->t_ospeed == t->c_ospeed && 1057 tp->t_cflag == t->c_cflag) 1058 return 0; 1059 1060 lcr = cflag2lcr(t->c_cflag); 1061 1062 s = splserial(); 1063 SSCOM_LOCK(sc); 1064 1065 sc->sc_ulcon = lcr; 1066 1067 /* 1068 * If we're not in a mode that assumes a connection is present, then 1069 * ignore carrier changes. 1070 */ 1071 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1072 sc->sc_msr_dcd = 0; 1073 else 1074 sc->sc_msr_dcd = MSTS_DCD; 1075 1076 /* 1077 * Set the flow control pins depending on the current flow control 1078 * mode. 1079 */ 1080 if (ISSET(t->c_cflag, CRTSCTS)) { 1081 sc->sc_mcr_dtr = UMCON_DTR; 1082 sc->sc_mcr_rts = UMCON_RTS; 1083 sc->sc_msr_cts = MSTS_CTS; 1084 } 1085 else if (ISSET(t->c_cflag, MDMBUF)) { 1086 /* 1087 * For DTR/DCD flow control, make sure we don't toggle DTR for 1088 * carrier detection. 1089 */ 1090 sc->sc_mcr_dtr = 0; 1091 sc->sc_mcr_rts = UMCON_DTR; 1092 sc->sc_msr_cts = MSTS_DCD; 1093 } 1094 else { 1095 /* 1096 * If no flow control, then always set RTS. This will make 1097 * the other side happy if it mistakenly thinks we're doing 1098 * RTS/CTS flow control. 1099 */ 1100 sc->sc_mcr_dtr = UMCON_DTR | UMCON_RTS; 1101 sc->sc_mcr_rts = 0; 1102 sc->sc_msr_cts = 0; 1103 if (ISSET(sc->sc_umcon, UMCON_DTR)) 1104 SET(sc->sc_umcon, UMCON_RTS); 1105 else 1106 CLR(sc->sc_umcon, UMCON_RTS); 1107 } 1108 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 1109 1110 if (ospeed == 0) 1111 CLR(sc->sc_umcon, sc->sc_mcr_dtr); 1112 else 1113 SET(sc->sc_umcon, sc->sc_mcr_dtr); 1114 1115 sc->sc_ubrdiv = ospeed; 1116 1117 /* And copy to tty. */ 1118 tp->t_ispeed = 0; 1119 tp->t_ospeed = t->c_ospeed; 1120 tp->t_cflag = t->c_cflag; 1121 1122 if (!sc->sc_heldchange) { 1123 if (sc->sc_tx_busy) { 1124 sc->sc_heldtbc = sc->sc_tbc; 1125 sc->sc_tbc = 0; 1126 sc->sc_heldchange = 1; 1127 } else 1128 sscom_loadchannelregs(sc); 1129 } 1130 1131 if (!ISSET(t->c_cflag, CHWFLOW)) { 1132 /* Disable the high water mark. */ 1133 sc->sc_r_hiwat = 0; 1134 sc->sc_r_lowat = 0; 1135 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1136 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1137 sscom_schedrx(sc); 1138 } 1139 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1140 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1141 sscom_hwiflow(sc); 1142 } 1143 } else { 1144 sc->sc_r_hiwat = sscom_rbuf_hiwat; 1145 sc->sc_r_lowat = sscom_rbuf_lowat; 1146 } 1147 1148 SSCOM_UNLOCK(sc); 1149 splx(s); 1150 1151 /* 1152 * Update the tty layer's idea of the carrier bit, in case we changed 1153 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1154 * explicit request. 1155 */ 1156 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msts, MSTS_DCD)); 1157 1158 if (sscom_debug) 1159 sscomstatus(sc, "sscomparam "); 1160 1161 if (!ISSET(t->c_cflag, CHWFLOW)) { 1162 if (sc->sc_tx_stopped) { 1163 sc->sc_tx_stopped = 0; 1164 sscomstart(tp); 1165 } 1166 } 1167 1168 return 0; 1169 } 1170 1171 static void 1172 sscom_iflush(struct sscom_softc *sc) 1173 { 1174 bus_space_tag_t iot = sc->sc_iot; 1175 bus_space_handle_t ioh = sc->sc_ioh; 1176 int timo; 1177 1178 1179 timo = 50000; 1180 /* flush any pending I/O */ 1181 while ( sscom_rxrdy(iot, ioh) && --timo) 1182 (void)sscom_getc(iot,ioh); 1183 #ifdef DIAGNOSTIC 1184 if (!timo) 1185 printf("%s: sscom_iflush timeout\n", sc->sc_dev.dv_xname); 1186 #endif 1187 } 1188 1189 static void 1190 sscom_loadchannelregs(struct sscom_softc *sc) 1191 { 1192 bus_space_tag_t iot = sc->sc_iot; 1193 bus_space_handle_t ioh = sc->sc_ioh; 1194 1195 /* XXXXX necessary? */ 1196 sscom_iflush(sc); 1197 1198 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1199 1200 #if 0 1201 if (ISSET(sc->sc_hwflags, COM_HW_FLOW)) { 1202 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1203 bus_space_write_1(iot, ioh, com_efr, sc->sc_efr); 1204 } 1205 #endif 1206 1207 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, sc->sc_ubrdiv); 1208 bus_space_write_1(iot, ioh, SSCOM_ULCON, sc->sc_ulcon); 1209 sc->set_modem_control(sc); 1210 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1211 } 1212 1213 static int 1214 sscomhwiflow(struct tty *tp, int block) 1215 { 1216 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1217 int s; 1218 1219 if (SSCOM_ISALIVE(sc) == 0) 1220 return 0; 1221 1222 if (sc->sc_mcr_rts == 0) 1223 return 0; 1224 1225 s = splserial(); 1226 SSCOM_LOCK(sc); 1227 1228 if (block) { 1229 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1230 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1231 sscom_hwiflow(sc); 1232 } 1233 } else { 1234 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1235 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1236 sscom_schedrx(sc); 1237 } 1238 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1239 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1240 sscom_hwiflow(sc); 1241 } 1242 } 1243 1244 SSCOM_UNLOCK(sc); 1245 splx(s); 1246 return 1; 1247 } 1248 1249 /* 1250 * (un)block input via hw flowcontrol 1251 */ 1252 static void 1253 sscom_hwiflow(struct sscom_softc *sc) 1254 { 1255 if (sc->sc_mcr_rts == 0) 1256 return; 1257 1258 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 1259 CLR(sc->sc_umcon, sc->sc_mcr_rts); 1260 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 1261 } else { 1262 SET(sc->sc_umcon, sc->sc_mcr_rts); 1263 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 1264 } 1265 sc->set_modem_control(sc); 1266 } 1267 1268 1269 void 1270 sscomstart(struct tty *tp) 1271 { 1272 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1273 int s; 1274 1275 if (SSCOM_ISALIVE(sc) == 0) 1276 return; 1277 1278 s = spltty(); 1279 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1280 goto out; 1281 if (sc->sc_tx_stopped) 1282 goto out; 1283 1284 if (tp->t_outq.c_cc <= tp->t_lowat) { 1285 if (ISSET(tp->t_state, TS_ASLEEP)) { 1286 CLR(tp->t_state, TS_ASLEEP); 1287 wakeup(&tp->t_outq); 1288 } 1289 selwakeup(&tp->t_wsel); 1290 if (tp->t_outq.c_cc == 0) 1291 goto out; 1292 } 1293 1294 /* Grab the first contiguous region of buffer space. */ 1295 { 1296 u_char *tba; 1297 int tbc; 1298 1299 tba = tp->t_outq.c_cf; 1300 tbc = ndqb(&tp->t_outq, 0); 1301 1302 (void)splserial(); 1303 SSCOM_LOCK(sc); 1304 1305 sc->sc_tba = tba; 1306 sc->sc_tbc = tbc; 1307 } 1308 1309 SET(tp->t_state, TS_BUSY); 1310 sc->sc_tx_busy = 1; 1311 1312 /* Output the first chunk of the contiguous buffer. */ 1313 sscom_output_chunk(sc); 1314 1315 /* Enable transmit completion interrupts if necessary. */ 1316 if ((sc->sc_hwflags & SSCOM_HW_TXINT) == 0) 1317 sscom_enable_txint(sc); 1318 1319 SSCOM_UNLOCK(sc); 1320 out: 1321 splx(s); 1322 return; 1323 } 1324 1325 /* 1326 * Stop output on a line. 1327 */ 1328 void 1329 sscomstop(struct tty *tp, int flag) 1330 { 1331 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1332 int s; 1333 1334 s = splserial(); 1335 SSCOM_LOCK(sc); 1336 if (ISSET(tp->t_state, TS_BUSY)) { 1337 /* Stop transmitting at the next chunk. */ 1338 sc->sc_tbc = 0; 1339 sc->sc_heldtbc = 0; 1340 if (!ISSET(tp->t_state, TS_TTSTOP)) 1341 SET(tp->t_state, TS_FLUSH); 1342 } 1343 SSCOM_UNLOCK(sc); 1344 splx(s); 1345 } 1346 1347 void 1348 sscomdiag(void *arg) 1349 { 1350 struct sscom_softc *sc = arg; 1351 int overflows, floods; 1352 int s; 1353 1354 s = splserial(); 1355 SSCOM_LOCK(sc); 1356 overflows = sc->sc_overflows; 1357 sc->sc_overflows = 0; 1358 floods = sc->sc_floods; 1359 sc->sc_floods = 0; 1360 sc->sc_errors = 0; 1361 SSCOM_UNLOCK(sc); 1362 splx(s); 1363 1364 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1365 sc->sc_dev.dv_xname, 1366 overflows, overflows == 1 ? "" : "s", 1367 floods, floods == 1 ? "" : "s"); 1368 } 1369 1370 integrate void 1371 sscom_rxsoft(struct sscom_softc *sc, struct tty *tp) 1372 { 1373 int (*rint) (int, struct tty *) = tp->t_linesw->l_rint; 1374 u_char *get, *end; 1375 u_int cc, scc; 1376 u_char rsr; 1377 int code; 1378 int s; 1379 1380 end = sc->sc_ebuf; 1381 get = sc->sc_rbget; 1382 scc = cc = sscom_rbuf_size - sc->sc_rbavail; 1383 1384 if (cc == sscom_rbuf_size) { 1385 sc->sc_floods++; 1386 if (sc->sc_errors++ == 0) 1387 callout_reset(&sc->sc_diag_callout, 60 * hz, 1388 sscomdiag, sc); 1389 } 1390 1391 while (cc) { 1392 code = get[0]; 1393 rsr = get[1]; 1394 if (rsr) { 1395 if (ISSET(rsr, UERSTAT_OVERRUN)) { 1396 sc->sc_overflows++; 1397 if (sc->sc_errors++ == 0) 1398 callout_reset(&sc->sc_diag_callout, 1399 60 * hz, sscomdiag, sc); 1400 } 1401 if (ISSET(rsr, UERSTAT_BREAK | UERSTAT_FRAME)) 1402 SET(code, TTY_FE); 1403 if (ISSET(rsr, UERSTAT_PARITY)) 1404 SET(code, TTY_PE); 1405 } 1406 if ((*rint)(code, tp) == -1) { 1407 /* 1408 * The line discipline's buffer is out of space. 1409 */ 1410 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1411 /* 1412 * We're either not using flow control, or the 1413 * line discipline didn't tell us to block for 1414 * some reason. Either way, we have no way to 1415 * know when there's more space available, so 1416 * just drop the rest of the data. 1417 */ 1418 get += cc << 1; 1419 if (get >= end) 1420 get -= sscom_rbuf_size << 1; 1421 cc = 0; 1422 } else { 1423 /* 1424 * Don't schedule any more receive processing 1425 * until the line discipline tells us there's 1426 * space available (through sscomhwiflow()). 1427 * Leave the rest of the data in the input 1428 * buffer. 1429 */ 1430 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1431 } 1432 break; 1433 } 1434 get += 2; 1435 if (get >= end) 1436 get = sc->sc_rbuf; 1437 cc--; 1438 } 1439 1440 if (cc != scc) { 1441 sc->sc_rbget = get; 1442 s = splserial(); 1443 SSCOM_LOCK(sc); 1444 1445 cc = sc->sc_rbavail += scc - cc; 1446 /* Buffers should be ok again, release possible block. */ 1447 if (cc >= sc->sc_r_lowat) { 1448 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1449 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1450 sscom_enable_rxint(sc); 1451 sc->sc_ucon |= UCON_ERRINT; 1452 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, 1453 sc->sc_ucon); 1454 1455 } 1456 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1457 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1458 sscom_hwiflow(sc); 1459 } 1460 } 1461 SSCOM_UNLOCK(sc); 1462 splx(s); 1463 } 1464 } 1465 1466 integrate void 1467 sscom_txsoft(struct sscom_softc *sc, struct tty *tp) 1468 { 1469 1470 CLR(tp->t_state, TS_BUSY); 1471 if (ISSET(tp->t_state, TS_FLUSH)) 1472 CLR(tp->t_state, TS_FLUSH); 1473 else 1474 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1475 (*tp->t_linesw->l_start)(tp); 1476 } 1477 1478 integrate void 1479 sscom_stsoft(struct sscom_softc *sc, struct tty *tp) 1480 { 1481 u_char msr, delta; 1482 int s; 1483 1484 s = splserial(); 1485 SSCOM_LOCK(sc); 1486 msr = sc->sc_msts; 1487 delta = sc->sc_msr_delta; 1488 sc->sc_msr_delta = 0; 1489 SSCOM_UNLOCK(sc); 1490 splx(s); 1491 1492 if (ISSET(delta, sc->sc_msr_dcd)) { 1493 /* 1494 * Inform the tty layer that carrier detect changed. 1495 */ 1496 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSTS_DCD)); 1497 } 1498 1499 if (ISSET(delta, sc->sc_msr_cts)) { 1500 /* Block or unblock output according to flow control. */ 1501 if (ISSET(msr, sc->sc_msr_cts)) { 1502 sc->sc_tx_stopped = 0; 1503 (*tp->t_linesw->l_start)(tp); 1504 } else { 1505 sc->sc_tx_stopped = 1; 1506 } 1507 } 1508 1509 if (sscom_debug) 1510 sscomstatus(sc, "sscom_stsoft"); 1511 } 1512 1513 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1514 void 1515 sscomsoft(void *arg) 1516 { 1517 struct sscom_softc *sc = arg; 1518 struct tty *tp; 1519 1520 if (SSCOM_ISALIVE(sc) == 0) 1521 return; 1522 1523 { 1524 tp = sc->sc_tty; 1525 1526 if (sc->sc_rx_ready) { 1527 sc->sc_rx_ready = 0; 1528 sscom_rxsoft(sc, tp); 1529 } 1530 1531 if (sc->sc_st_check) { 1532 sc->sc_st_check = 0; 1533 sscom_stsoft(sc, tp); 1534 } 1535 1536 if (sc->sc_tx_done) { 1537 sc->sc_tx_done = 0; 1538 sscom_txsoft(sc, tp); 1539 } 1540 } 1541 } 1542 #else 1543 #error sscom needs GENERIC_SOFT_INERRUPTS 1544 #endif 1545 1546 1547 int 1548 sscomintr(void *arg) 1549 { 1550 struct sscom_softc *sc = arg; 1551 bus_space_tag_t iot = sc->sc_iot; 1552 bus_space_handle_t ioh = sc->sc_ioh; 1553 u_char *put, *end; 1554 u_int cc; 1555 1556 if (SSCOM_ISALIVE(sc) == 0) 1557 return 0; 1558 1559 SSCOM_LOCK(sc); 1560 1561 end = sc->sc_ebuf; 1562 put = sc->sc_rbput; 1563 cc = sc->sc_rbavail; 1564 1565 do { 1566 u_char msts, delta; 1567 u_char uerstat; 1568 uint16_t ufstat; 1569 1570 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1571 1572 /* XXX: break interrupt with no character? */ 1573 1574 if ( (ufstat & (UFSTAT_RXCOUNT|UFSTAT_RXFULL)) && 1575 !ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1576 while (cc > 0) { 1577 int cn_trapped = 0; 1578 1579 /* get status and received character. 1580 read status register first */ 1581 uerstat = sscom_geterr(iot, ioh); 1582 put[0] = sscom_getc(iot, ioh); 1583 1584 if (ISSET(uerstat, UERSTAT_BREAK)) { 1585 int cn_trapped = 0; 1586 cn_check_magic(sc->sc_tty->t_dev, 1587 CNC_BREAK, sscom_cnm_state); 1588 if (cn_trapped) 1589 continue; 1590 #if defined(KGDB) 1591 if (ISSET(sc->sc_hwflags, 1592 SSCOM_HW_KGDB)) { 1593 kgdb_connect(1); 1594 continue; 1595 } 1596 #endif 1597 } 1598 1599 put[1] = uerstat; 1600 cn_check_magic(sc->sc_tty->t_dev, 1601 put[0], sscom_cnm_state); 1602 if (!cn_trapped) { 1603 put += 2; 1604 if (put >= end) 1605 put = sc->sc_rbuf; 1606 cc--; 1607 } 1608 1609 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1610 if ( (ufstat & (UFSTAT_RXFULL|UFSTAT_RXCOUNT)) == 0 ) 1611 break; 1612 } 1613 1614 /* 1615 * Current string of incoming characters ended because 1616 * no more data was available or we ran out of space. 1617 * Schedule a receive event if any data was received. 1618 * If we're out of space, turn off receive interrupts. 1619 */ 1620 sc->sc_rbput = put; 1621 sc->sc_rbavail = cc; 1622 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1623 sc->sc_rx_ready = 1; 1624 1625 /* 1626 * See if we are in danger of overflowing a buffer. If 1627 * so, use hardware flow control to ease the pressure. 1628 */ 1629 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1630 cc < sc->sc_r_hiwat) { 1631 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1632 sscom_hwiflow(sc); 1633 } 1634 1635 /* 1636 * If we're out of space, disable receive interrupts 1637 * until the queue has drained a bit. 1638 */ 1639 if (!cc) { 1640 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1641 sscom_disable_rxint(sc); 1642 sc->sc_ucon &= ~UCON_ERRINT; 1643 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1644 } 1645 } 1646 1647 msts = sc->read_modem_status(sc); 1648 delta = msts ^ sc->sc_msts; 1649 sc->sc_msts = msts; 1650 1651 #if 0 1652 /* 1653 * Pulse-per-second (PSS) signals on edge of DCD? 1654 * Process these even if line discipline is ignoring DCD. 1655 */ 1656 if (delta & sc->sc_ppsmask) { 1657 struct timeval tv; 1658 if ((msr & sc->sc_ppsmask) == sc->sc_ppsassert) { 1659 /* XXX nanotime() */ 1660 microtime(&tv); 1661 TIMEVAL_TO_TIMESPEC(&tv, 1662 &sc->ppsinfo.assert_timestamp); 1663 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1664 timespecadd(&sc->ppsinfo.assert_timestamp, 1665 &sc->ppsparam.assert_offset, 1666 &sc->ppsinfo.assert_timestamp); 1667 } 1668 1669 #ifdef PPS_SYNC 1670 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1671 hardpps(&tv, tv.tv_usec); 1672 #endif 1673 sc->ppsinfo.assert_sequence++; 1674 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1675 1676 } else if ((msr & sc->sc_ppsmask) == sc->sc_ppsclear) { 1677 /* XXX nanotime() */ 1678 microtime(&tv); 1679 TIMEVAL_TO_TIMESPEC(&tv, 1680 &sc->ppsinfo.clear_timestamp); 1681 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1682 timespecadd(&sc->ppsinfo.clear_timestamp, 1683 &sc->ppsparam.clear_offset, 1684 &sc->ppsinfo.clear_timestamp); 1685 } 1686 1687 #ifdef PPS_SYNC 1688 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1689 hardpps(&tv, tv.tv_usec); 1690 #endif 1691 sc->ppsinfo.clear_sequence++; 1692 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1693 } 1694 } 1695 #endif 1696 1697 /* 1698 * Process normal status changes 1699 */ 1700 if (ISSET(delta, sc->sc_msr_mask)) { 1701 SET(sc->sc_msr_delta, delta); 1702 1703 /* 1704 * Stop output immediately if we lose the output 1705 * flow control signal or carrier detect. 1706 */ 1707 if (ISSET(~msts, sc->sc_msr_mask)) { 1708 sc->sc_tbc = 0; 1709 sc->sc_heldtbc = 0; 1710 #ifdef SSCOM_DEBUG 1711 if (sscom_debug) 1712 sscomstatus(sc, "sscomintr "); 1713 #endif 1714 } 1715 1716 sc->sc_st_check = 1; 1717 } 1718 1719 /* 1720 * Done handling any receive interrupts. 1721 */ 1722 1723 /* 1724 * If we've delayed a parameter change, do it 1725 * now, and restart * output. 1726 */ 1727 if ((ufstat & UFSTAT_TXCOUNT) == 0) { 1728 /* XXX: we should check transmitter empty also */ 1729 1730 if (sc->sc_heldchange) { 1731 sscom_loadchannelregs(sc); 1732 sc->sc_heldchange = 0; 1733 sc->sc_tbc = sc->sc_heldtbc; 1734 sc->sc_heldtbc = 0; 1735 } 1736 } 1737 1738 1739 /* 1740 * See if data can be transmitted as well. Schedule tx 1741 * done event if no data left and tty was marked busy. 1742 */ 1743 if (!ISSET(ufstat,UFSTAT_TXFULL)) { 1744 /* 1745 * Output the next chunk of the contiguous 1746 * buffer, if any. 1747 */ 1748 if (sc->sc_tbc > 0) { 1749 sscom_output_chunk(sc); 1750 } 1751 else { 1752 /* 1753 * Disable transmit sscompletion 1754 * interrupts if necessary. 1755 */ 1756 if (sc->sc_hwflags & SSCOM_HW_TXINT) 1757 sscom_disable_txint(sc); 1758 if (sc->sc_tx_busy) { 1759 sc->sc_tx_busy = 0; 1760 sc->sc_tx_done = 1; 1761 } 1762 } 1763 } 1764 } while (0); 1765 1766 SSCOM_UNLOCK(sc); 1767 1768 /* Wake up the poller. */ 1769 softintr_schedule(sc->sc_si); 1770 1771 #if NRND > 0 && defined(RND_COM) 1772 rnd_add_uint32(&sc->rnd_source, iir | rsr); 1773 #endif 1774 1775 return 1; 1776 } 1777 1778 1779 #if defined(KGDB) || defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1780 /* 1781 * Initialize UART for use as console or KGDB line. 1782 */ 1783 static int 1784 sscom_init(bus_space_tag_t iot, const struct sscom_uart_info *config, 1785 int rate, int frequency, tcflag_t cflag, bus_space_handle_t *iohp) 1786 { 1787 bus_space_handle_t ioh; 1788 bus_addr_t iobase = config->iobase; 1789 1790 if (bus_space_map(iot, iobase, SSCOM_SIZE, 0, &ioh)) 1791 return ENOMEM; /* ??? */ 1792 1793 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1794 bus_space_write_1(iot, ioh, SSCOM_UFCON, 1795 UFCON_TXTRIGGER_8 | UFCON_RXTRIGGER_8 | 1796 UFCON_TXFIFO_RESET | UFCON_RXFIFO_RESET | 1797 UFCON_FIFO_ENABLE ); 1798 /* tx/rx fifo reset are auto-cleared */ 1799 1800 rate = sscomspeed(rate, frequency); 1801 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, rate); 1802 bus_space_write_2(iot, ioh, SSCOM_ULCON, cflag2lcr(cflag)); 1803 1804 /* enable UART */ 1805 bus_space_write_2(iot, ioh, SSCOM_UCON, 1806 UCON_TXMODE_INT|UCON_RXMODE_INT); 1807 bus_space_write_2(iot, ioh, SSCOM_UMCON, UMCON_RTS); 1808 1809 *iohp = ioh; 1810 return 0; 1811 } 1812 1813 #endif 1814 1815 #if defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1816 /* 1817 * Following are all routines needed for SSCOM to act as console 1818 */ 1819 struct consdev sscomcons = { 1820 NULL, NULL, sscomcngetc, sscomcnputc, sscomcnpollc, NULL, 1821 NULL, NULL, NODEV, CN_NORMAL 1822 }; 1823 1824 1825 int 1826 sscom_cnattach(bus_space_tag_t iot, const struct sscom_uart_info *config, 1827 int rate, int frequency, tcflag_t cflag) 1828 { 1829 int res; 1830 1831 res = sscom_init(iot, config, rate, frequency, cflag, &sscomconsioh); 1832 if (res) 1833 return res; 1834 1835 cn_tab = &sscomcons; 1836 cn_init_magic(&sscom_cnm_state); 1837 cn_set_magic("\047\001"); /* default magic is BREAK */ 1838 1839 sscomconstag = iot; 1840 sscomconsunit = config->unit; 1841 sscomconsrate = rate; 1842 sscomconscflag = cflag; 1843 1844 return 0; 1845 } 1846 1847 void 1848 sscom_cndetach(void) 1849 { 1850 bus_space_unmap(sscomconstag, sscomconsioh, SSCOM_SIZE); 1851 sscomconstag = NULL; 1852 1853 cn_tab = NULL; 1854 } 1855 1856 /* 1857 * The read-ahead code is so that you can detect pending in-band 1858 * cn_magic in polled mode while doing output rather than having to 1859 * wait until the kernel decides it needs input. 1860 */ 1861 1862 #define MAX_READAHEAD 20 1863 static int sscom_readahead[MAX_READAHEAD]; 1864 static int sscom_readaheadcount = 0; 1865 1866 int 1867 sscomcngetc(dev_t dev) 1868 { 1869 int s = splserial(); 1870 u_char stat, c; 1871 1872 /* got a character from reading things earlier */ 1873 if (sscom_readaheadcount > 0) { 1874 int i; 1875 1876 c = sscom_readahead[0]; 1877 for (i = 1; i < sscom_readaheadcount; i++) { 1878 sscom_readahead[i-1] = sscom_readahead[i]; 1879 } 1880 sscom_readaheadcount--; 1881 splx(s); 1882 return c; 1883 } 1884 1885 /* block until a character becomes available */ 1886 while (!sscom_rxrdy(sscomconstag, sscomconsioh)) 1887 ; 1888 1889 c = sscom_getc(sscomconstag, sscomconsioh); 1890 stat = sscom_geterr(sscomconstag, sscomconsioh); 1891 { 1892 int cn_trapped = 0; /* unused */ 1893 #ifdef DDB 1894 extern int db_active; 1895 if (!db_active) 1896 #endif 1897 cn_check_magic(dev, c, sscom_cnm_state); 1898 } 1899 splx(s); 1900 return c; 1901 } 1902 1903 /* 1904 * Console kernel output character routine. 1905 */ 1906 void 1907 sscomcnputc(dev_t dev, int c) 1908 { 1909 int s = splserial(); 1910 int timo; 1911 1912 int cin, stat; 1913 if (sscom_readaheadcount < MAX_READAHEAD && 1914 sscom_rxrdy(sscomconstag, sscomconsioh)) { 1915 1916 int cn_trapped = 0; 1917 cin = sscom_getc(sscomconstag, sscomconsioh); 1918 stat = sscom_geterr(sscomconstag, sscomconsioh); 1919 cn_check_magic(dev, cin, sscom_cnm_state); 1920 sscom_readahead[sscom_readaheadcount++] = cin; 1921 } 1922 1923 /* wait for any pending transmission to finish */ 1924 timo = 150000; 1925 while (ISSET(bus_space_read_2(sscomconstag, sscomconsioh, SSCOM_UFSTAT), 1926 UFSTAT_TXFULL) && --timo) 1927 continue; 1928 1929 bus_space_write_1(sscomconstag, sscomconsioh, SSCOM_UTXH, c); 1930 SSCOM_BARRIER(sscomconstag, sscomconsioh, BR | BW); 1931 1932 #if 0 1933 /* wait for this transmission to complete */ 1934 timo = 1500000; 1935 while (!ISSET(bus_space_read_1(sscomconstag, sscomconsioh, SSCOM_UTRSTAT), 1936 UTRSTAT_TXEMPTY) && --timo) 1937 continue; 1938 #endif 1939 splx(s); 1940 } 1941 1942 void 1943 sscomcnpollc(dev_t dev, int on) 1944 { 1945 1946 } 1947 1948 #endif /* SSCOM0CONSOLE||SSCOM1CONSOLE */ 1949 1950 #ifdef KGDB 1951 int 1952 sscom_kgdb_attach(bus_space_tag_t iot, const struct sscom_uart_info *config, 1953 int rate, int frequency, tcflag_t cflag) 1954 { 1955 int res; 1956 1957 if (iot == sscomconstag && config->unit == sscomconsunit) { 1958 printf( "console==kgdb_port (%d): kgdb disabled\n", sscomconsunit); 1959 return EBUSY; /* cannot share with console */ 1960 } 1961 1962 res = sscom_init(iot, config, rate, frequency, cflag, &sscom_kgdb_ioh); 1963 if (res) 1964 return res; 1965 1966 kgdb_attach(sscom_kgdb_getc, sscom_kgdb_putc, NULL); 1967 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 1968 1969 sscom_kgdb_iot = iot; 1970 sscom_kgdb_unit = config->unit; 1971 1972 return 0; 1973 } 1974 1975 /* ARGSUSED */ 1976 int 1977 sscom_kgdb_getc(void *arg) 1978 { 1979 int c, stat; 1980 1981 /* block until a character becomes available */ 1982 while (!sscom_rxrdy(sscom_kgdb_iot, sscom_kgdb_ioh)) 1983 ; 1984 1985 c = sscom_getc(sscom_kgdb_iot, sscom_kgdb_ioh); 1986 stat = sscom_geterr(sscom_kgdb_iot, sscom_kgdb_ioh); 1987 1988 return c; 1989 } 1990 1991 /* ARGSUSED */ 1992 void 1993 sscom_kgdb_putc(void *arg, int c) 1994 { 1995 int timo; 1996 1997 /* wait for any pending transmission to finish */ 1998 timo = 150000; 1999 while (ISSET(bus_space_read_2(sscom_kgdb_iot, sscom_kgdb_ioh, 2000 SSCOM_UFSTAT), UFSTAT_TXFULL) && --timo) 2001 continue; 2002 2003 bus_space_write_1(sscom_kgdb_iot, sscom_kgdb_ioh, SSCOM_UTXH, c); 2004 SSCOM_BARRIER(sscom_kgdb_iot, sscom_kgdb_ioh, BR | BW); 2005 2006 #if 0 2007 /* wait for this transmission to complete */ 2008 timo = 1500000; 2009 while (!ISSET(bus_space_read_1(sscom_kgdb_iot, sscom_kgdb_ioh, 2010 SSCOM_UTRSTAT), UTRSTAT_TXEMPTY) && --timo) 2011 continue; 2012 #endif 2013 } 2014 #endif /* KGDB */ 2015 2016 /* helper function to identify the sscom ports used by 2017 console or KGDB (and not yet autoconf attached) */ 2018 int 2019 sscom_is_console(bus_space_tag_t iot, int unit, 2020 bus_space_handle_t *ioh) 2021 { 2022 bus_space_handle_t help; 2023 2024 if (!sscomconsattached && 2025 iot == sscomconstag && unit == sscomconsunit) 2026 help = sscomconsioh; 2027 #ifdef KGDB 2028 else if (!sscom_kgdb_attached && 2029 iot == sscom_kgdb_iot && unit == sscom_kgdb_unit) 2030 help = sscom_kgdb_ioh; 2031 #endif 2032 else 2033 return 0; 2034 2035 if (ioh) 2036 *ioh = help; 2037 return 1; 2038 } 2039
Indexes created Sun Sep 28 16:09:52 GMT 2025