sscom.c revision 1.2
1 /* $NetBSD: sscom.c,v 1.2 2003/03/08 10:59:02 he 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" 114 115 #include "rnd.h" 116 #if NRND > 0 && defined(RND_COM) 117 #include <sys/rnd.h> 118 #endif 119 120 /* 121 * Override cnmagic(9) macro before including <sys/systm.h>. 122 * We need to know if cn_check_magic triggered debugger, so set a flag. 123 * Callers of cn_check_magic must declare int cn_trapped = 0; 124 * XXX: this is *ugly*! 125 */ 126 #define cn_trap() \ 127 do { \ 128 console_debugger(); \ 129 cn_trapped = 1; \ 130 } while (/* CONSTCOND */ 0) 131 132 #include <sys/param.h> 133 #include <sys/systm.h> 134 #include <sys/ioctl.h> 135 #include <sys/select.h> 136 #include <sys/tty.h> 137 #include <sys/proc.h> 138 #include <sys/user.h> 139 #include <sys/conf.h> 140 #include <sys/file.h> 141 #include <sys/uio.h> 142 #include <sys/kernel.h> 143 #include <sys/syslog.h> 144 #include <sys/types.h> 145 #include <sys/device.h> 146 #include <sys/malloc.h> 147 #include <sys/timepps.h> 148 #include <sys/vnode.h> 149 150 #include <machine/intr.h> 151 #include <machine/bus.h> 152 153 #include <arm/s3c2xx0/s3c2xx0reg.h> 154 #include <arm/s3c2xx0/sscom_var.h> 155 #include <dev/cons.h> 156 157 dev_type_open(sscomopen); 158 dev_type_close(sscomclose); 159 dev_type_read(sscomread); 160 dev_type_write(sscomwrite); 161 dev_type_ioctl(sscomioctl); 162 dev_type_stop(sscomstop); 163 dev_type_tty(sscomtty); 164 dev_type_poll(sscompoll); 165 166 int sscomcngetc (dev_t); 167 void sscomcnputc (dev_t, int); 168 void sscomcnpollc (dev_t, int); 169 170 #define integrate static inline 171 void sscomsoft (void *); 172 173 integrate void sscom_rxsoft (struct sscom_softc *, struct tty *); 174 integrate void sscom_txsoft (struct sscom_softc *, struct tty *); 175 integrate void sscom_stsoft (struct sscom_softc *, struct tty *); 176 integrate void sscom_schedrx (struct sscom_softc *); 177 static void sscom_modem(struct sscom_softc *, int); 178 static void sscom_break(struct sscom_softc *, int); 179 static void sscom_iflush(struct sscom_softc *); 180 static void sscom_hwiflow(struct sscom_softc *); 181 static void sscom_loadchannelregs(struct sscom_softc *); 182 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 183 static int sscom_to_tiocm(struct sscom_softc *); 184 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 185 static int sscom_to_tiocm(struct sscom_softc *); 186 static void sscom_iflush(struct sscom_softc *); 187 188 static int sscomhwiflow(struct tty *tp, int block); 189 static int sscom_init(bus_space_tag_t, const struct sscom_uart_info *, 190 int, int, tcflag_t, bus_space_handle_t *); 191 192 extern struct cfdriver sscom_cd; 193 194 const struct cdevsw sscom_cdevsw = { 195 sscomopen, sscomclose, sscomread, sscomwrite, sscomioctl, 196 sscomstop, sscomtty, sscompoll, nommap, ttykqfilter, D_TTY 197 }; 198 199 /* 200 * Make this an option variable one can patch. 201 * But be warned: this must be a power of 2! 202 */ 203 u_int sscom_rbuf_size = SSCOM_RING_SIZE; 204 205 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 206 u_int sscom_rbuf_hiwat = (SSCOM_RING_SIZE * 1) / 4; 207 u_int sscom_rbuf_lowat = (SSCOM_RING_SIZE * 3) / 4; 208 209 static int sscomconsunit = -1; 210 static bus_space_tag_t sscomconstag; 211 static bus_space_handle_t sscomconsioh; 212 static int sscomconsattached; 213 static int sscomconsrate; 214 static tcflag_t sscomconscflag; 215 static struct cnm_state sscom_cnm_state; 216 217 #ifdef KGDB 218 #include <sys/kgdb.h> 219 220 static int sscom_kgdb_unit = -1; 221 static bus_space_tag_t sscom_kgdb_iot; 222 static bus_space_handle_t sscom_kgdb_ioh; 223 static int sscom_kgdb_attached; 224 225 int sscom_kgdb_getc (void *); 226 void sscom_kgdb_putc (void *, int); 227 #endif /* KGDB */ 228 229 #define SSCOMUNIT_MASK 0x7f 230 #define SSCOMDIALOUT_MASK 0x80 231 232 #define SSCOMUNIT(x) (minor(x) & SSCOMUNIT_MASK) 233 #define SSCOMDIALOUT(x) (minor(x) & SSCOMDIALOUT_MASK) 234 235 #if 0 236 #define SSCOM_ISALIVE(sc) ((sc)->enabled != 0 && \ 237 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 238 #else 239 #define SSCOM_ISALIVE(sc) ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE) 240 #endif 241 242 #define BR BUS_SPACE_BARRIER_READ 243 #define BW BUS_SPACE_BARRIER_WRITE 244 #define SSCOM_BARRIER(t, h, f) /* no-op */ 245 246 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 247 248 #define SSCOM_LOCK(sc) simple_lock(&(sc)->sc_lock) 249 #define SSCOM_UNLOCK(sc) simple_unlock(&(sc)->sc_lock) 250 251 #else 252 253 #define SSCOM_LOCK(sc) 254 #define SSCOM_UNLOCK(sc) 255 256 #endif 257 258 #ifndef SSCOM_TOLERANCE 259 #define SSCOM_TOLERANCE 30 /* XXX: baud rate tolerance, in 0.1% units */ 260 #endif 261 262 /* value for UCON */ 263 #define UCON_RXINT_MASK \ 264 (UCON_RXMODE_MASK|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE) 265 #define UCON_RXINT_ENABLE \ 266 (UCON_RXMODE_INT|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE_LEVEL) 267 #define UCON_TXINT_MASK (UCON_TXMODE_MASK|UCON_TXINT_TYPE) 268 #define UCON_TXINT_ENABLE (UCON_TXMODE_INT|UCON_TXINT_TYPE_LEVEL) 269 270 /* we don't want tx interrupt on debug port, but it is needed to 271 have transmitter active */ 272 #define UCON_DEBUGPORT (UCON_RXINT_ENABLE|UCON_TXINT_ENABLE) 273 274 275 static __inline void 276 sscom_output_chunk( struct sscom_softc *sc ) 277 { 278 int n, space; 279 bus_space_tag_t iot = sc->sc_iot; 280 bus_space_handle_t ioh = sc->sc_ioh; 281 282 n = sc->sc_tbc; 283 space = 16 - ((bus_space_read_2(iot, ioh, SSCOM_UFSTAT) & 284 UFSTAT_TXCOUNT) >> UFSTAT_TXCOUNT_SHIFT); 285 286 if (n > space) 287 n = space; 288 289 if( n > 0 ){ 290 bus_space_write_multi_1(iot, ioh, SSCOM_UTXH, sc->sc_tba, n); 291 sc->sc_tbc -= n; 292 sc->sc_tba += n; 293 } 294 } 295 296 297 298 int 299 sscomspeed(long speed, long frequency) 300 { 301 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 302 303 int x, err; 304 305 if (speed <= 0) 306 return -1; 307 x = divrnd(frequency / 16, speed); 308 if (x <= 0) 309 return -1; 310 err = divrnd(((quad_t)frequency) * 1000 / 16, speed * x) - 1000; 311 if (err < 0) 312 err = -err; 313 if (err > SSCOM_TOLERANCE) 314 return -1; 315 return x-1; 316 317 #undef divrnd 318 } 319 320 void sscomstatus (struct sscom_softc *, char *); 321 322 #ifdef SSCOM_DEBUG 323 int sscom_debug = 0; 324 325 void 326 sscomstatus(struct sscom_softc *sc, char *str) 327 { 328 struct tty *tp = sc->sc_tty; 329 int umstat = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMSTAT); 330 int umcon = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMCON); 331 332 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 333 sc->sc_dev.dv_xname, str, 334 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 335 "+", /* DCD */ 336 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 337 "+", /* DTR */ 338 sc->sc_tx_stopped ? "+" : "-"); 339 340 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 341 sc->sc_dev.dv_xname, str, 342 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 343 ISSET(umstat, UMSTAT_CTS) ? "+" : "-", 344 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 345 ISSET(umcon, UMCON_RTS) ? "+" : "-", 346 sc->sc_rx_flags); 347 } 348 #else 349 #define sscom_debug 0 350 #endif 351 352 static void 353 sscom_enable_debugport(struct sscom_softc *sc) 354 { 355 int s; 356 357 /* Turn on line break interrupt, set carrier. */ 358 s = splserial(); 359 SSCOM_LOCK(sc); 360 sc->sc_ucon = UCON_DEBUGPORT; 361 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 362 sc->sc_umcon = UMCON_RTS|UMCON_DTR; 363 sc->set_modem_control(sc); 364 sscom_enable_rxint(sc); 365 sscom_disable_txint(sc); 366 SSCOM_UNLOCK(sc); 367 splx(s); 368 } 369 370 static void 371 sscom_set_modem_control(struct sscom_softc *sc) 372 { 373 /* flob RTS */ 374 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 375 SSCOM_UMCON, sc->sc_umcon & UMCON_HW_MASK); 376 /* ignore DTR */ 377 } 378 379 static int 380 sscom_read_modem_status(struct sscom_softc *sc) 381 { 382 int msts; 383 384 msts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SSCOM_UMSTAT); 385 386 /* DCD and DSR are always on */ 387 return (msts & UMSTAT_CTS) | MSTS_DCD | MSTS_DSR; 388 } 389 390 391 void 392 sscom_attach_subr(struct sscom_softc *sc) 393 { 394 int unit = sc->sc_unit; 395 bus_space_tag_t iot = sc->sc_iot; 396 bus_space_handle_t ioh = sc->sc_ioh; 397 struct tty *tp; 398 399 callout_init(&sc->sc_diag_callout); 400 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 401 simple_lock_init(&sc->sc_lock); 402 #endif 403 404 sc->sc_ucon = UCON_RXINT_ENABLE|UCON_TXINT_ENABLE; 405 406 /* 407 * set default for modem control hook 408 */ 409 if( sc->set_modem_control == NULL ) 410 sc->set_modem_control = sscom_set_modem_control; 411 if( sc->read_modem_status == NULL ) 412 sc->read_modem_status = sscom_read_modem_status; 413 414 /* Disable interrupts before configuring the device. */ 415 sscom_disable_txrxint(sc); 416 417 #ifdef KGDB 418 /* 419 * Allow kgdb to "take over" this port. If this is 420 * the kgdb device, it has exclusive use. 421 */ 422 if( unit == sscom_kgdb_unit) { 423 SET(sc->sc_hwflags, SSCOM_HW_KGDB); 424 sc->sc_ucon = UCON_DEBUGPORT; 425 } 426 #endif 427 428 if (unit == sscomconsunit) { 429 sscomconsattached = 1; 430 431 sscomconstag = iot; 432 sscomconsioh = ioh; 433 434 /* Make sure the console is always "hardwired". */ 435 delay(1000); /* XXX: wait for output to finish */ 436 SET(sc->sc_hwflags, SSCOM_HW_CONSOLE); 437 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 438 439 sc->sc_ucon = UCON_DEBUGPORT; 440 } 441 442 sc->sc_fifolen = 16; 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 printf("%s: ", sc->sc_dev.dv_xname); 451 if( sc->sc_fifolen > 1 ){ 452 SET(sc->sc_hwflags, SSCOM_HW_FIFO); 453 printf("txfifo length = %d\n", sc->sc_fifolen); 454 } 455 else { 456 printf("txfifo disabled\n"); 457 } 458 459 #ifdef KGDB 460 if( ISSET(sc->sc_hwflags, SSCOM_HW_KGDB) ){ 461 sscom_kgdb_attached = 1; 462 printf("%s: kgdb\n", sc->sc_dev.dv_xname); 463 sscom_enable_debugport(sc); 464 return; 465 } 466 #endif 467 468 469 470 tp = ttymalloc(); 471 tp->t_oproc = sscomstart; 472 tp->t_param = sscomparam; 473 tp->t_hwiflow = sscomhwiflow; 474 475 sc->sc_tty = tp; 476 sc->sc_rbuf = malloc(sscom_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 477 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 478 sc->sc_rbavail = sscom_rbuf_size; 479 if (sc->sc_rbuf == NULL) { 480 printf("%s: unable to allocate ring buffer\n", 481 sc->sc_dev.dv_xname); 482 return; 483 } 484 sc->sc_ebuf = sc->sc_rbuf + (sscom_rbuf_size << 1); 485 486 tty_attach(tp); 487 488 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 489 int maj; 490 491 /* locate the major number */ 492 maj = cdevsw_lookup_major(&sscom_cdevsw); 493 494 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 495 496 printf("%s: console (major=%d)\n", sc->sc_dev.dv_xname, maj); 497 } 498 499 500 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sscomsoft, sc); 501 502 #if NRND > 0 && defined(RND_COM) 503 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 504 RND_TYPE_TTY, 0); 505 #endif 506 507 /* if there are no enable/disable functions, assume the device 508 is always enabled */ 509 510 if( ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE) ) 511 sscom_enable_debugport(sc); 512 else 513 sscom_disable_txrxint(sc); 514 515 SET(sc->sc_hwflags, SSCOM_HW_DEV_OK); 516 } 517 518 int 519 sscom_detach(struct device *self, int flags) 520 { 521 return 0; 522 } 523 524 int 525 sscom_activate(struct device *self, enum devact act) 526 { 527 #ifdef notyet 528 struct sscom_softc *sc = (struct sscom_softc *)self; 529 int s, rv = 0; 530 531 s = splserial(); 532 SSCOM_LOCK(sc); 533 switch (act) { 534 case DVACT_ACTIVATE: 535 rv = EOPNOTSUPP; 536 break; 537 538 case DVACT_DEACTIVATE: 539 if (sc->sc_hwflags & (SSCOM_HW_CONSOLE|SSCOM_HW_KGDB)) { 540 rv = EBUSY; 541 break; 542 } 543 544 sc->enabled = 0; 545 break; 546 } 547 548 SSCOM_UNLOCK(sc); 549 splx(s); 550 return rv; 551 #else 552 return 0; 553 #endif 554 } 555 556 void 557 sscom_shutdown(struct sscom_softc *sc) 558 { 559 #ifdef notyet 560 struct tty *tp = sc->sc_tty; 561 int s; 562 563 s = splserial(); 564 SSCOM_LOCK(sc); 565 566 /* If we were asserting flow control, then deassert it. */ 567 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 568 sscom_hwiflow(sc); 569 570 /* Clear any break condition set with TIOCSBRK. */ 571 sscom_break(sc, 0); 572 573 /* 574 * Hang up if necessary. Wait a bit, so the other side has time to 575 * notice even if we immediately open the port again. 576 * Avoid tsleeping above splhigh(). 577 */ 578 if (ISSET(tp->t_cflag, HUPCL)) { 579 sscom_modem(sc, 0); 580 SSCOM_UNLOCK(sc); 581 splx(s); 582 /* XXX tsleep will only timeout */ 583 (void) tsleep(sc, TTIPRI, ttclos, hz); 584 s = splserial(); 585 SSCOM_LOCK(sc); 586 } 587 588 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 589 /* interrupt on break */ 590 sc->sc_ucon = UCON_DEBUGPORT; 591 else 592 sc->sc_ucon = 0; 593 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 594 595 #ifdef DIAGNOSTIC 596 if (!sc->enabled) 597 panic("sscom_shutdown: not enabled?"); 598 #endif 599 sc->enabled = 0; 600 SSCOM_UNLOCK(sc); 601 splx(s); 602 #endif 603 } 604 605 int 606 sscomopen(dev_t dev, int flag, int mode, struct proc *p) 607 { 608 struct sscom_softc *sc; 609 struct tty *tp; 610 int s, s2; 611 int error; 612 613 sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 614 if (sc == NULL || !ISSET(sc->sc_hwflags, SSCOM_HW_DEV_OK) || 615 sc->sc_rbuf == NULL) 616 return ENXIO; 617 618 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 619 return ENXIO; 620 621 #ifdef KGDB 622 /* 623 * If this is the kgdb port, no other use is permitted. 624 */ 625 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) 626 return EBUSY; 627 #endif 628 629 tp = sc->sc_tty; 630 631 if (ISSET(tp->t_state, TS_ISOPEN) && 632 ISSET(tp->t_state, TS_XCLUDE) && 633 p->p_ucred->cr_uid != 0) 634 return EBUSY; 635 636 s = spltty(); 637 638 /* 639 * Do the following iff this is a first open. 640 */ 641 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 642 struct termios t; 643 644 tp->t_dev = dev; 645 646 s2 = splserial(); 647 SSCOM_LOCK(sc); 648 649 /* Turn on interrupts. */ 650 sscom_enable_txrxint(sc); 651 652 /* Fetch the current modem control status, needed later. */ 653 sc->sc_msts = sc->read_modem_status(sc); 654 655 #if 0 656 /* Clear PPS capture state on first open. */ 657 sc->sc_ppsmask = 0; 658 sc->ppsparam.mode = 0; 659 #endif 660 661 SSCOM_UNLOCK(sc); 662 splx(s2); 663 664 /* 665 * Initialize the termios status to the defaults. Add in the 666 * sticky bits from TIOCSFLAGS. 667 */ 668 t.c_ispeed = 0; 669 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 670 t.c_ospeed = sscomconsrate; 671 t.c_cflag = sscomconscflag; 672 } else { 673 t.c_ospeed = TTYDEF_SPEED; 674 t.c_cflag = TTYDEF_CFLAG; 675 } 676 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 677 SET(t.c_cflag, CLOCAL); 678 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 679 SET(t.c_cflag, CRTSCTS); 680 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 681 SET(t.c_cflag, MDMBUF); 682 /* Make sure sscomparam() will do something. */ 683 tp->t_ospeed = 0; 684 (void) sscomparam(tp, &t); 685 tp->t_iflag = TTYDEF_IFLAG; 686 tp->t_oflag = TTYDEF_OFLAG; 687 tp->t_lflag = TTYDEF_LFLAG; 688 ttychars(tp); 689 ttsetwater(tp); 690 691 s2 = splserial(); 692 SSCOM_LOCK(sc); 693 694 /* 695 * Turn on DTR. We must always do this, even if carrier is not 696 * present, because otherwise we'd have to use TIOCSDTR 697 * immediately after setting CLOCAL, which applications do not 698 * expect. We always assert DTR while the device is open 699 * unless explicitly requested to deassert it. 700 */ 701 sscom_modem(sc, 1); 702 703 /* Clear the input ring, and unblock. */ 704 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 705 sc->sc_rbavail = sscom_rbuf_size; 706 sscom_iflush(sc); 707 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 708 sscom_hwiflow(sc); 709 710 if (sscom_debug) 711 sscomstatus(sc, "sscomopen "); 712 713 SSCOM_UNLOCK(sc); 714 splx(s2); 715 } 716 717 splx(s); 718 719 error = ttyopen(tp, SSCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 720 if (error) 721 goto bad; 722 723 error = (*tp->t_linesw->l_open)(dev, tp); 724 if (error) 725 goto bad; 726 727 return 0; 728 729 bad: 730 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 731 /* 732 * We failed to open the device, and nobody else had it opened. 733 * Clean up the state as appropriate. 734 */ 735 sscom_shutdown(sc); 736 } 737 738 return error; 739 } 740 741 int 742 sscomclose(dev_t dev, int flag, int mode, struct proc *p) 743 { 744 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 745 struct tty *tp = sc->sc_tty; 746 747 /* XXX This is for cons.c. */ 748 if (!ISSET(tp->t_state, TS_ISOPEN)) 749 return 0; 750 751 (*tp->t_linesw->l_close)(tp, flag); 752 ttyclose(tp); 753 754 if (SSCOM_ISALIVE(sc) == 0) 755 return 0; 756 757 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 758 /* 759 * Although we got a last close, the device may still be in 760 * use; e.g. if this was the dialout node, and there are still 761 * processes waiting for carrier on the non-dialout node. 762 */ 763 sscom_shutdown(sc); 764 } 765 766 return 0; 767 } 768 769 int 770 sscomread(dev_t dev, struct uio *uio, int flag) 771 { 772 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 773 struct tty *tp = sc->sc_tty; 774 775 if (SSCOM_ISALIVE(sc) == 0) 776 return EIO; 777 778 return (*tp->t_linesw->l_read)(tp, uio, flag); 779 } 780 781 int 782 sscomwrite(dev_t dev, struct uio *uio, int flag) 783 { 784 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 785 struct tty *tp = sc->sc_tty; 786 787 if (SSCOM_ISALIVE(sc) == 0) 788 return EIO; 789 790 return (*tp->t_linesw->l_write)(tp, uio, flag); 791 } 792 793 int 794 sscompoll(dev_t dev, int events, struct proc *p) 795 { 796 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 797 struct tty *tp = sc->sc_tty; 798 799 if (SSCOM_ISALIVE(sc) == 0) 800 return EIO; 801 802 return (*tp->t_linesw->l_poll)(tp, events, p); 803 } 804 805 struct tty * 806 sscomtty(dev_t dev) 807 { 808 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 809 struct tty *tp = sc->sc_tty; 810 811 return tp; 812 } 813 814 int 815 sscomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 816 { 817 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 818 struct tty *tp = sc->sc_tty; 819 int error; 820 int s; 821 822 if (SSCOM_ISALIVE(sc) == 0) 823 return EIO; 824 825 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 826 if (error != EPASSTHROUGH) 827 return error; 828 829 error = ttioctl(tp, cmd, data, flag, p); 830 if (error != EPASSTHROUGH) 831 return error; 832 833 error = 0; 834 835 s = splserial(); 836 SSCOM_LOCK(sc); 837 838 switch (cmd) { 839 case TIOCSBRK: 840 sscom_break(sc, 1); 841 break; 842 843 case TIOCCBRK: 844 sscom_break(sc, 0); 845 break; 846 847 case TIOCSDTR: 848 sscom_modem(sc, 1); 849 break; 850 851 case TIOCCDTR: 852 sscom_modem(sc, 0); 853 break; 854 855 case TIOCGFLAGS: 856 *(int *)data = sc->sc_swflags; 857 break; 858 859 case TIOCSFLAGS: 860 error = suser(p->p_ucred, &p->p_acflag); 861 if (error) 862 break; 863 sc->sc_swflags = *(int *)data; 864 break; 865 866 case TIOCMSET: 867 case TIOCMBIS: 868 case TIOCMBIC: 869 tiocm_to_sscom(sc, cmd, *(int *)data); 870 break; 871 872 case TIOCMGET: 873 *(int *)data = sscom_to_tiocm(sc); 874 break; 875 876 default: 877 error = EPASSTHROUGH; 878 break; 879 } 880 881 SSCOM_UNLOCK(sc); 882 splx(s); 883 884 if (sscom_debug) 885 sscomstatus(sc, "sscomioctl "); 886 887 return error; 888 } 889 890 integrate void 891 sscom_schedrx(struct sscom_softc *sc) 892 { 893 894 sc->sc_rx_ready = 1; 895 896 /* Wake up the poller. */ 897 softintr_schedule(sc->sc_si); 898 } 899 900 static void 901 sscom_break(struct sscom_softc *sc, int onoff) 902 { 903 904 if (onoff) 905 SET(sc->sc_ucon, UCON_SBREAK); 906 else 907 CLR(sc->sc_ucon, UCON_SBREAK); 908 909 if (!sc->sc_heldchange) { 910 if (sc->sc_tx_busy) { 911 sc->sc_heldtbc = sc->sc_tbc; 912 sc->sc_tbc = 0; 913 sc->sc_heldchange = 1; 914 } else 915 sscom_loadchannelregs(sc); 916 } 917 } 918 919 static void 920 sscom_modem(struct sscom_softc *sc, int onoff) 921 { 922 if (onoff) 923 SET(sc->sc_umcon, UMCON_DTR); 924 else 925 CLR(sc->sc_umcon, UMCON_DTR); 926 927 if (!sc->sc_heldchange) { 928 if (sc->sc_tx_busy) { 929 sc->sc_heldtbc = sc->sc_tbc; 930 sc->sc_tbc = 0; 931 sc->sc_heldchange = 1; 932 } else 933 sscom_loadchannelregs(sc); 934 } 935 } 936 937 static void 938 tiocm_to_sscom(struct sscom_softc *sc, u_long how, int ttybits) 939 { 940 u_char sscombits; 941 942 sscombits = 0; 943 if (ISSET(ttybits, TIOCM_DTR)) 944 sscombits = UMCON_DTR; 945 if (ISSET(ttybits, TIOCM_RTS)) 946 SET(sscombits, UMCON_RTS); 947 948 switch (how) { 949 case TIOCMBIC: 950 CLR(sc->sc_umcon, sscombits); 951 break; 952 953 case TIOCMBIS: 954 SET(sc->sc_umcon, sscombits); 955 break; 956 957 case TIOCMSET: 958 CLR(sc->sc_umcon, UMCON_DTR|UMCON_RTS); 959 SET(sc->sc_umcon, sscombits); 960 break; 961 } 962 963 if (!sc->sc_heldchange) { 964 if (sc->sc_tx_busy) { 965 sc->sc_heldtbc = sc->sc_tbc; 966 sc->sc_tbc = 0; 967 sc->sc_heldchange = 1; 968 } else 969 sscom_loadchannelregs(sc); 970 } 971 } 972 973 static int 974 sscom_to_tiocm(struct sscom_softc *sc) 975 { 976 u_char sscombits; 977 int ttybits = 0; 978 979 sscombits = sc->sc_umcon; 980 #if 0 981 if (ISSET(sscombits, MCR_DTR)) 982 SET(ttybits, TIOCM_DTR); 983 #endif 984 if (ISSET(sscombits, UMCON_RTS)) 985 SET(ttybits, TIOCM_RTS); 986 987 sscombits = sc->sc_msts; 988 if (ISSET(sscombits, MSTS_DCD)) 989 SET(ttybits, TIOCM_CD); 990 if (ISSET(sscombits, MSTS_DSR)) 991 SET(ttybits, TIOCM_DSR); 992 if (ISSET(sscombits, MSTS_CTS)) 993 SET(ttybits, TIOCM_CTS); 994 995 if (sc->sc_ucon != 0) 996 SET(ttybits, TIOCM_LE); 997 998 return ttybits; 999 } 1000 1001 static int 1002 cflag2lcr(tcflag_t cflag) 1003 { 1004 u_char lcr = ULCON_PARITY_NONE; 1005 1006 switch( cflag & (PARENB|PARODD) ){ 1007 case PARENB|PARODD: lcr = ULCON_PARITY_ODD; break; 1008 case PARENB: lcr = ULCON_PARITY_EVEN; 1009 } 1010 1011 switch (ISSET(cflag, CSIZE)) { 1012 case CS5: 1013 SET(lcr, ULCON_LENGTH_5); 1014 break; 1015 case CS6: 1016 SET(lcr, ULCON_LENGTH_6); 1017 break; 1018 case CS7: 1019 SET(lcr, ULCON_LENGTH_7); 1020 break; 1021 case CS8: 1022 SET(lcr, ULCON_LENGTH_8); 1023 break; 1024 } 1025 if (ISSET(cflag, CSTOPB)) 1026 SET(lcr, ULCON_STOP); 1027 1028 return lcr; 1029 } 1030 1031 int 1032 sscomparam(struct tty *tp, struct termios *t) 1033 { 1034 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1035 int ospeed; 1036 u_char lcr; 1037 int s; 1038 1039 if (SSCOM_ISALIVE(sc) == 0) 1040 return EIO; 1041 1042 ospeed = sscomspeed(t->c_ospeed, sc->sc_frequency); 1043 1044 /* Check requested parameters. */ 1045 if (ospeed < 0) 1046 return EINVAL; 1047 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1048 return EINVAL; 1049 1050 /* 1051 * For the console, always force CLOCAL and !HUPCL, so that the port 1052 * is always active. 1053 */ 1054 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 1055 ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 1056 SET(t->c_cflag, CLOCAL); 1057 CLR(t->c_cflag, HUPCL); 1058 } 1059 1060 /* 1061 * If there were no changes, don't do anything. This avoids dropping 1062 * input and improves performance when all we did was frob things like 1063 * VMIN and VTIME. 1064 */ 1065 if (tp->t_ospeed == t->c_ospeed && 1066 tp->t_cflag == t->c_cflag) 1067 return 0; 1068 1069 lcr = cflag2lcr(t->c_cflag); 1070 1071 s = splserial(); 1072 SSCOM_LOCK(sc); 1073 1074 sc->sc_ulcon = lcr; 1075 1076 /* 1077 * If we're not in a mode that assumes a connection is present, then 1078 * ignore carrier changes. 1079 */ 1080 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1081 sc->sc_msr_dcd = 0; 1082 else 1083 sc->sc_msr_dcd = MSTS_DCD; 1084 1085 /* 1086 * Set the flow control pins depending on the current flow control 1087 * mode. 1088 */ 1089 if (ISSET(t->c_cflag, CRTSCTS)) { 1090 sc->sc_mcr_dtr = UMCON_DTR; 1091 sc->sc_mcr_rts = UMCON_RTS; 1092 sc->sc_msr_cts = MSTS_CTS; 1093 } 1094 else if (ISSET(t->c_cflag, MDMBUF)) { 1095 /* 1096 * For DTR/DCD flow control, make sure we don't toggle DTR for 1097 * carrier detection. 1098 */ 1099 sc->sc_mcr_dtr = 0; 1100 sc->sc_mcr_rts = UMCON_DTR; 1101 sc->sc_msr_cts = MSTS_DCD; 1102 } 1103 else { 1104 /* 1105 * If no flow control, then always set RTS. This will make 1106 * the other side happy if it mistakenly thinks we're doing 1107 * RTS/CTS flow control. 1108 */ 1109 sc->sc_mcr_dtr = UMCON_DTR | UMCON_RTS; 1110 sc->sc_mcr_rts = 0; 1111 sc->sc_msr_cts = 0; 1112 if (ISSET(sc->sc_umcon, UMCON_DTR)) 1113 SET(sc->sc_umcon, UMCON_RTS); 1114 else 1115 CLR(sc->sc_umcon, UMCON_RTS); 1116 } 1117 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 1118 1119 if (ospeed == 0) 1120 CLR(sc->sc_umcon, sc->sc_mcr_dtr); 1121 else 1122 SET(sc->sc_umcon, sc->sc_mcr_dtr); 1123 1124 sc->sc_ubrdiv = ospeed; 1125 1126 /* And copy to tty. */ 1127 tp->t_ispeed = 0; 1128 tp->t_ospeed = t->c_ospeed; 1129 tp->t_cflag = t->c_cflag; 1130 1131 if (!sc->sc_heldchange) { 1132 if (sc->sc_tx_busy) { 1133 sc->sc_heldtbc = sc->sc_tbc; 1134 sc->sc_tbc = 0; 1135 sc->sc_heldchange = 1; 1136 } else 1137 sscom_loadchannelregs(sc); 1138 } 1139 1140 if (!ISSET(t->c_cflag, CHWFLOW)) { 1141 /* Disable the high water mark. */ 1142 sc->sc_r_hiwat = 0; 1143 sc->sc_r_lowat = 0; 1144 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1145 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1146 sscom_schedrx(sc); 1147 } 1148 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1149 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1150 sscom_hwiflow(sc); 1151 } 1152 } else { 1153 sc->sc_r_hiwat = sscom_rbuf_hiwat; 1154 sc->sc_r_lowat = sscom_rbuf_lowat; 1155 } 1156 1157 SSCOM_UNLOCK(sc); 1158 splx(s); 1159 1160 /* 1161 * Update the tty layer's idea of the carrier bit, in case we changed 1162 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1163 * explicit request. 1164 */ 1165 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msts, MSTS_DCD)); 1166 1167 if (sscom_debug) 1168 sscomstatus(sc, "sscomparam "); 1169 1170 if (!ISSET(t->c_cflag, CHWFLOW)) { 1171 if (sc->sc_tx_stopped) { 1172 sc->sc_tx_stopped = 0; 1173 sscomstart(tp); 1174 } 1175 } 1176 1177 return 0; 1178 } 1179 1180 static void 1181 sscom_iflush(struct sscom_softc *sc) 1182 { 1183 bus_space_tag_t iot = sc->sc_iot; 1184 bus_space_handle_t ioh = sc->sc_ioh; 1185 int timo; 1186 1187 1188 timo = 50000; 1189 /* flush any pending I/O */ 1190 while ( sscom_rxrdy(iot, ioh) && --timo) 1191 (void)sscom_getc(iot,ioh); 1192 #ifdef DIAGNOSTIC 1193 if (!timo) 1194 printf("%s: sscom_iflush timeout\n", sc->sc_dev.dv_xname); 1195 #endif 1196 } 1197 1198 static void 1199 sscom_loadchannelregs(struct sscom_softc *sc) 1200 { 1201 bus_space_tag_t iot = sc->sc_iot; 1202 bus_space_handle_t ioh = sc->sc_ioh; 1203 1204 /* XXXXX necessary? */ 1205 sscom_iflush(sc); 1206 1207 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1208 1209 #if 0 1210 if (ISSET(sc->sc_hwflags, COM_HW_FLOW)) { 1211 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1212 bus_space_write_1(iot, ioh, com_efr, sc->sc_efr); 1213 } 1214 #endif 1215 1216 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, sc->sc_ubrdiv); 1217 bus_space_write_1(iot, ioh, SSCOM_ULCON, sc->sc_ulcon); 1218 sc->set_modem_control(sc); 1219 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1220 } 1221 1222 static int 1223 sscomhwiflow(struct tty *tp, int block) 1224 { 1225 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1226 int s; 1227 1228 if (SSCOM_ISALIVE(sc) == 0) 1229 return 0; 1230 1231 if (sc->sc_mcr_rts == 0) 1232 return 0; 1233 1234 s = splserial(); 1235 SSCOM_LOCK(sc); 1236 1237 if (block) { 1238 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1239 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1240 sscom_hwiflow(sc); 1241 } 1242 } else { 1243 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1244 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1245 sscom_schedrx(sc); 1246 } 1247 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1248 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1249 sscom_hwiflow(sc); 1250 } 1251 } 1252 1253 SSCOM_UNLOCK(sc); 1254 splx(s); 1255 return 1; 1256 } 1257 1258 /* 1259 * (un)block input via hw flowcontrol 1260 */ 1261 static void 1262 sscom_hwiflow(struct sscom_softc *sc) 1263 { 1264 if (sc->sc_mcr_rts == 0) 1265 return; 1266 1267 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 1268 CLR(sc->sc_umcon, sc->sc_mcr_rts); 1269 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 1270 } else { 1271 SET(sc->sc_umcon, sc->sc_mcr_rts); 1272 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 1273 } 1274 sc->set_modem_control(sc); 1275 } 1276 1277 1278 void 1279 sscomstart(struct tty *tp) 1280 { 1281 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1282 int s; 1283 1284 if (SSCOM_ISALIVE(sc) == 0) 1285 return; 1286 1287 s = spltty(); 1288 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1289 goto out; 1290 if (sc->sc_tx_stopped) 1291 goto out; 1292 1293 if (tp->t_outq.c_cc <= tp->t_lowat) { 1294 if (ISSET(tp->t_state, TS_ASLEEP)) { 1295 CLR(tp->t_state, TS_ASLEEP); 1296 wakeup(&tp->t_outq); 1297 } 1298 selwakeup(&tp->t_wsel); 1299 if (tp->t_outq.c_cc == 0) 1300 goto out; 1301 } 1302 1303 /* Grab the first contiguous region of buffer space. */ 1304 { 1305 u_char *tba; 1306 int tbc; 1307 1308 tba = tp->t_outq.c_cf; 1309 tbc = ndqb(&tp->t_outq, 0); 1310 1311 (void)splserial(); 1312 SSCOM_LOCK(sc); 1313 1314 sc->sc_tba = tba; 1315 sc->sc_tbc = tbc; 1316 } 1317 1318 SET(tp->t_state, TS_BUSY); 1319 sc->sc_tx_busy = 1; 1320 1321 /* Output the first chunk of the contiguous buffer. */ 1322 sscom_output_chunk(sc); 1323 1324 /* Enable transmit completion interrupts if necessary. */ 1325 if( (sc->sc_hwflags & SSCOM_HW_TXINT) == 0 ) 1326 sscom_enable_txint(sc); 1327 1328 SSCOM_UNLOCK(sc); 1329 out: 1330 splx(s); 1331 return; 1332 } 1333 1334 /* 1335 * Stop output on a line. 1336 */ 1337 void 1338 sscomstop(struct tty *tp, int flag) 1339 { 1340 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1341 int s; 1342 1343 s = splserial(); 1344 SSCOM_LOCK(sc); 1345 if (ISSET(tp->t_state, TS_BUSY)) { 1346 /* Stop transmitting at the next chunk. */ 1347 sc->sc_tbc = 0; 1348 sc->sc_heldtbc = 0; 1349 if (!ISSET(tp->t_state, TS_TTSTOP)) 1350 SET(tp->t_state, TS_FLUSH); 1351 } 1352 SSCOM_UNLOCK(sc); 1353 splx(s); 1354 } 1355 1356 void 1357 sscomdiag(void *arg) 1358 { 1359 struct sscom_softc *sc = arg; 1360 int overflows, floods; 1361 int s; 1362 1363 s = splserial(); 1364 SSCOM_LOCK(sc); 1365 overflows = sc->sc_overflows; 1366 sc->sc_overflows = 0; 1367 floods = sc->sc_floods; 1368 sc->sc_floods = 0; 1369 sc->sc_errors = 0; 1370 SSCOM_UNLOCK(sc); 1371 splx(s); 1372 1373 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1374 sc->sc_dev.dv_xname, 1375 overflows, overflows == 1 ? "" : "s", 1376 floods, floods == 1 ? "" : "s"); 1377 } 1378 1379 integrate void 1380 sscom_rxsoft(struct sscom_softc *sc, struct tty *tp) 1381 { 1382 int (*rint) (int, struct tty *) = tp->t_linesw->l_rint; 1383 u_char *get, *end; 1384 u_int cc, scc; 1385 u_char rsr; 1386 int code; 1387 int s; 1388 1389 end = sc->sc_ebuf; 1390 get = sc->sc_rbget; 1391 scc = cc = sscom_rbuf_size - sc->sc_rbavail; 1392 1393 if (cc == sscom_rbuf_size) { 1394 sc->sc_floods++; 1395 if (sc->sc_errors++ == 0) 1396 callout_reset(&sc->sc_diag_callout, 60 * hz, 1397 sscomdiag, sc); 1398 } 1399 1400 while (cc) { 1401 code = get[0]; 1402 rsr = get[1]; 1403 if (rsr){ 1404 if (ISSET(rsr, UERSTAT_OVERRUN)) { 1405 sc->sc_overflows++; 1406 if (sc->sc_errors++ == 0) 1407 callout_reset(&sc->sc_diag_callout, 1408 60 * hz, sscomdiag, sc); 1409 } 1410 if (ISSET(rsr, UERSTAT_BREAK | UERSTAT_FRAME)) 1411 SET(code, TTY_FE); 1412 if (ISSET(rsr, UERSTAT_PARITY)) 1413 SET(code, TTY_PE); 1414 } 1415 if ((*rint)(code, tp) == -1) { 1416 /* 1417 * The line discipline's buffer is out of space. 1418 */ 1419 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1420 /* 1421 * We're either not using flow control, or the 1422 * line discipline didn't tell us to block for 1423 * some reason. Either way, we have no way to 1424 * know when there's more space available, so 1425 * just drop the rest of the data. 1426 */ 1427 get += cc << 1; 1428 if (get >= end) 1429 get -= sscom_rbuf_size << 1; 1430 cc = 0; 1431 } else { 1432 /* 1433 * Don't schedule any more receive processing 1434 * until the line discipline tells us there's 1435 * space available (through sscomhwiflow()). 1436 * Leave the rest of the data in the input 1437 * buffer. 1438 */ 1439 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1440 } 1441 break; 1442 } 1443 get += 2; 1444 if (get >= end) 1445 get = sc->sc_rbuf; 1446 cc--; 1447 } 1448 1449 if (cc != scc) { 1450 sc->sc_rbget = get; 1451 s = splserial(); 1452 SSCOM_LOCK(sc); 1453 1454 cc = sc->sc_rbavail += scc - cc; 1455 /* Buffers should be ok again, release possible block. */ 1456 if (cc >= sc->sc_r_lowat) { 1457 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1458 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1459 sscom_enable_rxint(sc); 1460 } 1461 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1462 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1463 sscom_hwiflow(sc); 1464 } 1465 } 1466 SSCOM_UNLOCK(sc); 1467 splx(s); 1468 } 1469 } 1470 1471 integrate void 1472 sscom_txsoft(struct sscom_softc *sc, struct tty *tp) 1473 { 1474 1475 CLR(tp->t_state, TS_BUSY); 1476 if (ISSET(tp->t_state, TS_FLUSH)) 1477 CLR(tp->t_state, TS_FLUSH); 1478 else 1479 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1480 (*tp->t_linesw->l_start)(tp); 1481 } 1482 1483 integrate void 1484 sscom_stsoft(struct sscom_softc *sc, struct tty *tp) 1485 { 1486 u_char msr, delta; 1487 int s; 1488 1489 s = splserial(); 1490 SSCOM_LOCK(sc); 1491 msr = sc->sc_msts; 1492 delta = sc->sc_msr_delta; 1493 sc->sc_msr_delta = 0; 1494 SSCOM_UNLOCK(sc); 1495 splx(s); 1496 1497 if (ISSET(delta, sc->sc_msr_dcd)) { 1498 /* 1499 * Inform the tty layer that carrier detect changed. 1500 */ 1501 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSTS_DCD)); 1502 } 1503 1504 if (ISSET(delta, sc->sc_msr_cts)) { 1505 /* Block or unblock output according to flow control. */ 1506 if (ISSET(msr, sc->sc_msr_cts)) { 1507 sc->sc_tx_stopped = 0; 1508 (*tp->t_linesw->l_start)(tp); 1509 } else { 1510 sc->sc_tx_stopped = 1; 1511 } 1512 } 1513 1514 if (sscom_debug) 1515 sscomstatus(sc, "sscom_stsoft"); 1516 } 1517 1518 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1519 void 1520 sscomsoft(void *arg) 1521 { 1522 struct sscom_softc *sc = arg; 1523 struct tty *tp; 1524 1525 if (SSCOM_ISALIVE(sc) == 0) 1526 return; 1527 1528 { 1529 tp = sc->sc_tty; 1530 1531 if (sc->sc_rx_ready) { 1532 sc->sc_rx_ready = 0; 1533 sscom_rxsoft(sc, tp); 1534 } 1535 1536 if (sc->sc_st_check) { 1537 sc->sc_st_check = 0; 1538 sscom_stsoft(sc, tp); 1539 } 1540 1541 if (sc->sc_tx_done) { 1542 sc->sc_tx_done = 0; 1543 sscom_txsoft(sc, tp); 1544 } 1545 } 1546 } 1547 #else 1548 #error sscom needs GENERIC_SOFT_INERRUPTS 1549 #endif 1550 1551 1552 int 1553 sscomintr(void *arg) 1554 { 1555 struct sscom_softc *sc = arg; 1556 bus_space_tag_t iot = sc->sc_iot; 1557 bus_space_handle_t ioh = sc->sc_ioh; 1558 u_char *put, *end; 1559 u_int cc; 1560 1561 if (SSCOM_ISALIVE(sc) == 0) 1562 return 0; 1563 1564 SSCOM_LOCK(sc); 1565 1566 end = sc->sc_ebuf; 1567 put = sc->sc_rbput; 1568 cc = sc->sc_rbavail; 1569 1570 do { 1571 u_char msts, delta; 1572 u_char uerstat; 1573 uint16_t ufstat; 1574 1575 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1576 1577 /* XXX: break interrupt with no character? */ 1578 1579 if ( (ufstat & UFSTAT_RXCOUNT) != 0 && 1580 !ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1581 while (cc > 0) { 1582 int cn_trapped = 0; 1583 1584 /* get status and received character. 1585 read status register first */ 1586 uerstat = sscom_geterr(iot, ioh); 1587 put[0] = sscom_getc(iot, ioh); 1588 1589 if (ISSET(uerstat, UERSTAT_BREAK)) { 1590 int cn_trapped = 0; 1591 cn_check_magic(sc->sc_tty->t_dev, 1592 CNC_BREAK, sscom_cnm_state); 1593 if (cn_trapped) 1594 continue; 1595 #if defined(KGDB) 1596 if (ISSET(sc->sc_hwflags, 1597 SSCOM_HW_KGDB)) { 1598 kgdb_connect(1); 1599 continue; 1600 } 1601 #endif 1602 } 1603 1604 put[1] = uerstat; 1605 cn_check_magic(sc->sc_tty->t_dev, 1606 put[0], sscom_cnm_state); 1607 if( !cn_trapped ){ 1608 put += 2; 1609 if (put >= end) 1610 put = sc->sc_rbuf; 1611 cc--; 1612 } 1613 1614 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1615 if ( (ufstat & UFSTAT_RXCOUNT) == 0 ) 1616 break; 1617 } 1618 1619 /* 1620 * Current string of incoming characters ended because 1621 * no more data was available or we ran out of space. 1622 * Schedule a receive event if any data was received. 1623 * If we're out of space, turn off receive interrupts. 1624 */ 1625 sc->sc_rbput = put; 1626 sc->sc_rbavail = cc; 1627 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1628 sc->sc_rx_ready = 1; 1629 1630 /* 1631 * See if we are in danger of overflowing a buffer. If 1632 * so, use hardware flow control to ease the pressure. 1633 */ 1634 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1635 cc < sc->sc_r_hiwat) { 1636 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1637 sscom_hwiflow(sc); 1638 } 1639 1640 /* 1641 * If we're out of space, disable receive interrupts 1642 * until the queue has drained a bit. 1643 */ 1644 if (!cc) { 1645 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1646 sscom_disable_rxint(sc); 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 Sat Sep 27 22:09:54 GMT 2025