sscom.c revision 1.10
1 /* $NetBSD: sscom.c,v 1.10 2003/08/04 12:28:50 bsh Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 Fujitsu Component Limited 5 * Copyright (c) 2002, 2003 Genetec Corporation 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of The Fujitsu Component Limited nor the name of 17 * Genetec corporation may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC 21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC 25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /*- 36 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 37 * All rights reserved. 38 * 39 * This code is derived from software contributed to The NetBSD Foundation 40 * by Charles M. Hannum. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the NetBSD 53 * Foundation, Inc. and its contributors. 54 * 4. Neither the name of The NetBSD Foundation nor the names of its 55 * contributors may be used to endorse or promote products derived 56 * from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 68 * POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 /* 72 * Copyright (c) 1991 The Regents of the University of California. 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by the University of 86 * California, Berkeley and its contributors. 87 * 4. Neither the name of the University nor the names of its contributors 88 * may be used to endorse or promote products derived from this software 89 * without specific prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * @(#)com.c 7.5 (Berkeley) 5/16/91 104 */ 105 106 /* 107 * Support integrated UARTs of Samsung S3C2800/2400X/2410X 108 * Derived from sys/dev/ic/com.c 109 */ 110 111 #include <sys/cdefs.h> 112 __KERNEL_RCSID(0, "$NetBSD: sscom.c,v 1.10 2003/08/04 12:28:50 bsh Exp $"); 113 114 #include "opt_sscom.h" 115 #include "opt_ddb.h" 116 #include "opt_kgdb.h" 117 #include "opt_multiprocessor.h" 118 #include "opt_lockdebug.h" 119 120 #include "rnd.h" 121 #if NRND > 0 && defined(RND_COM) 122 #include <sys/rnd.h> 123 #endif 124 125 /* 126 * Override cnmagic(9) macro before including <sys/systm.h>. 127 * We need to know if cn_check_magic triggered debugger, so set a flag. 128 * Callers of cn_check_magic must declare int cn_trapped = 0; 129 * XXX: this is *ugly*! 130 */ 131 #define cn_trap() \ 132 do { \ 133 console_debugger(); \ 134 cn_trapped = 1; \ 135 } while (/* CONSTCOND */ 0) 136 137 #include <sys/param.h> 138 #include <sys/systm.h> 139 #include <sys/ioctl.h> 140 #include <sys/select.h> 141 #include <sys/tty.h> 142 #include <sys/proc.h> 143 #include <sys/user.h> 144 #include <sys/conf.h> 145 #include <sys/file.h> 146 #include <sys/uio.h> 147 #include <sys/kernel.h> 148 #include <sys/syslog.h> 149 #include <sys/types.h> 150 #include <sys/device.h> 151 #include <sys/malloc.h> 152 #include <sys/timepps.h> 153 #include <sys/vnode.h> 154 155 #include <machine/intr.h> 156 #include <machine/bus.h> 157 158 #include <arm/s3c2xx0/s3c2xx0reg.h> 159 #include <arm/s3c2xx0/s3c2xx0var.h> 160 #if defined(SSCOM_S3C2410) || defined(SSCOM_S3C2400) 161 #include <arm/s3c2xx0/s3c24x0reg.h> 162 #elif defined(SSCOM_S3C2800) 163 #include <arm/s3c2xx0/s3c2800reg.h> 164 #endif 165 #include <arm/s3c2xx0/sscom_var.h> 166 #include <dev/cons.h> 167 168 dev_type_open(sscomopen); 169 dev_type_close(sscomclose); 170 dev_type_read(sscomread); 171 dev_type_write(sscomwrite); 172 dev_type_ioctl(sscomioctl); 173 dev_type_stop(sscomstop); 174 dev_type_tty(sscomtty); 175 dev_type_poll(sscompoll); 176 177 int sscomcngetc (dev_t); 178 void sscomcnputc (dev_t, int); 179 void sscomcnpollc (dev_t, int); 180 181 #define integrate static inline 182 void sscomsoft (void *); 183 184 integrate void sscom_rxsoft (struct sscom_softc *, struct tty *); 185 integrate void sscom_txsoft (struct sscom_softc *, struct tty *); 186 integrate void sscom_stsoft (struct sscom_softc *, struct tty *); 187 integrate void sscom_schedrx (struct sscom_softc *); 188 static void sscom_modem(struct sscom_softc *, int); 189 static void sscom_break(struct sscom_softc *, int); 190 static void sscom_iflush(struct sscom_softc *); 191 static void sscom_hwiflow(struct sscom_softc *); 192 static void sscom_loadchannelregs(struct sscom_softc *); 193 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 194 static int sscom_to_tiocm(struct sscom_softc *); 195 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 196 static int sscom_to_tiocm(struct sscom_softc *); 197 static void sscom_iflush(struct sscom_softc *); 198 199 static int sscomhwiflow(struct tty *tp, int block); 200 static int sscom_init(bus_space_tag_t, const struct sscom_uart_info *, 201 int, int, tcflag_t, bus_space_handle_t *); 202 203 extern struct cfdriver sscom_cd; 204 205 const struct cdevsw sscom_cdevsw = { 206 sscomopen, sscomclose, sscomread, sscomwrite, sscomioctl, 207 sscomstop, sscomtty, sscompoll, nommap, ttykqfilter, D_TTY 208 }; 209 210 /* 211 * Make this an option variable one can patch. 212 * But be warned: this must be a power of 2! 213 */ 214 u_int sscom_rbuf_size = SSCOM_RING_SIZE; 215 216 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 217 u_int sscom_rbuf_hiwat = (SSCOM_RING_SIZE * 1) / 4; 218 u_int sscom_rbuf_lowat = (SSCOM_RING_SIZE * 3) / 4; 219 220 static int sscomconsunit = -1; 221 static bus_space_tag_t sscomconstag; 222 static bus_space_handle_t sscomconsioh; 223 static int sscomconsattached; 224 static int sscomconsrate; 225 static tcflag_t sscomconscflag; 226 static struct cnm_state sscom_cnm_state; 227 228 #ifdef KGDB 229 #include <sys/kgdb.h> 230 231 static int sscom_kgdb_unit = -1; 232 static bus_space_tag_t sscom_kgdb_iot; 233 static bus_space_handle_t sscom_kgdb_ioh; 234 static int sscom_kgdb_attached; 235 236 int sscom_kgdb_getc (void *); 237 void sscom_kgdb_putc (void *, int); 238 #endif /* KGDB */ 239 240 #define SSCOMUNIT_MASK 0x7f 241 #define SSCOMDIALOUT_MASK 0x80 242 243 #define SSCOMUNIT(x) (minor(x) & SSCOMUNIT_MASK) 244 #define SSCOMDIALOUT(x) (minor(x) & SSCOMDIALOUT_MASK) 245 246 #if 0 247 #define SSCOM_ISALIVE(sc) ((sc)->enabled != 0 && \ 248 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 249 #else 250 #define SSCOM_ISALIVE(sc) ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE) 251 #endif 252 253 #define BR BUS_SPACE_BARRIER_READ 254 #define BW BUS_SPACE_BARRIER_WRITE 255 #define SSCOM_BARRIER(t, h, f) /* no-op */ 256 257 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 258 259 #define SSCOM_LOCK(sc) simple_lock(&(sc)->sc_lock) 260 #define SSCOM_UNLOCK(sc) simple_unlock(&(sc)->sc_lock) 261 262 #else 263 264 #define SSCOM_LOCK(sc) 265 #define SSCOM_UNLOCK(sc) 266 267 #endif 268 269 #ifndef SSCOM_TOLERANCE 270 #define SSCOM_TOLERANCE 30 /* XXX: baud rate tolerance, in 0.1% units */ 271 #endif 272 273 /* value for UCON */ 274 #define UCON_RXINT_MASK \ 275 (UCON_RXMODE_MASK|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE) 276 #define UCON_RXINT_ENABLE \ 277 (UCON_RXMODE_INT|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE_LEVEL) 278 #define UCON_TXINT_MASK (UCON_TXMODE_MASK|UCON_TXINT_TYPE) 279 #define UCON_TXINT_ENABLE (UCON_TXMODE_INT|UCON_TXINT_TYPE_LEVEL) 280 281 /* we don't want tx interrupt on debug port, but it is needed to 282 have transmitter active */ 283 #define UCON_DEBUGPORT (UCON_RXINT_ENABLE|UCON_TXINT_ENABLE) 284 285 286 static __inline void 287 __sscom_output_chunk(struct sscom_softc *sc, int ufstat) 288 { 289 int n, space; 290 bus_space_tag_t iot = sc->sc_iot; 291 bus_space_handle_t ioh = sc->sc_ioh; 292 293 n = sc->sc_tbc; 294 space = 16 - ((ufstat & UFSTAT_TXCOUNT) >> UFSTAT_TXCOUNT_SHIFT); 295 296 if (n > space) 297 n = space; 298 299 if (n > 0) { 300 bus_space_write_multi_1(iot, ioh, SSCOM_UTXH, sc->sc_tba, n); 301 sc->sc_tbc -= n; 302 sc->sc_tba += n; 303 } 304 } 305 306 static void 307 sscom_output_chunk(struct sscom_softc *sc) 308 { 309 int ufstat = bus_space_read_2(sc->sc_iot, sc->sc_ioh, SSCOM_UFSTAT); 310 311 if (!(ufstat & UFSTAT_TXFULL)) 312 __sscom_output_chunk(sc, ufstat); 313 } 314 315 int 316 sscomspeed(long speed, long frequency) 317 { 318 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 319 320 int x, err; 321 322 if (speed <= 0) 323 return -1; 324 x = divrnd(frequency / 16, speed); 325 if (x <= 0) 326 return -1; 327 err = divrnd(((quad_t)frequency) * 1000 / 16, speed * x) - 1000; 328 if (err < 0) 329 err = -err; 330 if (err > SSCOM_TOLERANCE) 331 return -1; 332 return x-1; 333 334 #undef divrnd 335 } 336 337 void sscomstatus (struct sscom_softc *, char *); 338 339 #ifdef SSCOM_DEBUG 340 int sscom_debug = 0; 341 342 void 343 sscomstatus(struct sscom_softc *sc, char *str) 344 { 345 struct tty *tp = sc->sc_tty; 346 int umstat = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMSTAT); 347 int umcon = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMCON); 348 349 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 350 sc->sc_dev.dv_xname, str, 351 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 352 "+", /* DCD */ 353 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 354 "+", /* DTR */ 355 sc->sc_tx_stopped ? "+" : "-"); 356 357 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 358 sc->sc_dev.dv_xname, str, 359 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 360 ISSET(umstat, UMSTAT_CTS) ? "+" : "-", 361 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 362 ISSET(umcon, UMCON_RTS) ? "+" : "-", 363 sc->sc_rx_flags); 364 } 365 #else 366 #define sscom_debug 0 367 #endif 368 369 static void 370 sscom_enable_debugport(struct sscom_softc *sc) 371 { 372 int s; 373 374 /* Turn on line break interrupt, set carrier. */ 375 s = splserial(); 376 SSCOM_LOCK(sc); 377 sc->sc_ucon = UCON_DEBUGPORT; 378 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 379 sc->sc_umcon = UMCON_RTS|UMCON_DTR; 380 sc->set_modem_control(sc); 381 sscom_enable_rxint(sc); 382 sscom_disable_txint(sc); 383 SSCOM_UNLOCK(sc); 384 splx(s); 385 } 386 387 static void 388 sscom_set_modem_control(struct sscom_softc *sc) 389 { 390 /* flob RTS */ 391 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 392 SSCOM_UMCON, sc->sc_umcon & UMCON_HW_MASK); 393 /* ignore DTR */ 394 } 395 396 static int 397 sscom_read_modem_status(struct sscom_softc *sc) 398 { 399 int msts; 400 401 msts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SSCOM_UMSTAT); 402 403 /* DCD and DSR are always on */ 404 return (msts & UMSTAT_CTS) | MSTS_DCD | MSTS_DSR; 405 } 406 407 void 408 sscom_attach_subr(struct sscom_softc *sc) 409 { 410 int unit = sc->sc_unit; 411 bus_space_tag_t iot = sc->sc_iot; 412 bus_space_handle_t ioh = sc->sc_ioh; 413 struct tty *tp; 414 415 callout_init(&sc->sc_diag_callout); 416 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 417 simple_lock_init(&sc->sc_lock); 418 #endif 419 420 sc->sc_ucon = UCON_RXINT_ENABLE|UCON_TXINT_ENABLE; 421 422 /* 423 * set default for modem control hook 424 */ 425 if (sc->set_modem_control == NULL) 426 sc->set_modem_control = sscom_set_modem_control; 427 if (sc->read_modem_status == NULL) 428 sc->read_modem_status = sscom_read_modem_status; 429 430 /* Disable interrupts before configuring the device. */ 431 sscom_disable_txrxint(sc); 432 433 #ifdef KGDB 434 /* 435 * Allow kgdb to "take over" this port. If this is 436 * the kgdb device, it has exclusive use. 437 */ 438 if (unit == sscom_kgdb_unit) { 439 SET(sc->sc_hwflags, SSCOM_HW_KGDB); 440 sc->sc_ucon = UCON_DEBUGPORT; 441 } 442 #endif 443 444 if (unit == sscomconsunit) { 445 sscomconsattached = 1; 446 447 sscomconstag = iot; 448 sscomconsioh = ioh; 449 450 /* Make sure the console is always "hardwired". */ 451 delay(1000); /* XXX: wait for output to finish */ 452 SET(sc->sc_hwflags, SSCOM_HW_CONSOLE); 453 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 454 455 sc->sc_ucon = UCON_DEBUGPORT; 456 } 457 458 bus_space_write_1(iot, ioh, SSCOM_UFCON, 459 UFCON_TXTRIGGER_8|UFCON_RXTRIGGER_8|UFCON_FIFO_ENABLE| 460 UFCON_TXFIFO_RESET|UFCON_RXFIFO_RESET); 461 462 bus_space_write_1(iot, ioh, SSCOM_UCON, sc->sc_ucon); 463 464 #ifdef KGDB 465 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) { 466 sscom_kgdb_attached = 1; 467 printf("%s: kgdb\n", sc->sc_dev.dv_xname); 468 sscom_enable_debugport(sc); 469 return; 470 } 471 #endif 472 473 474 475 tp = ttymalloc(); 476 tp->t_oproc = sscomstart; 477 tp->t_param = sscomparam; 478 tp->t_hwiflow = sscomhwiflow; 479 480 sc->sc_tty = tp; 481 sc->sc_rbuf = malloc(sscom_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 482 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 483 sc->sc_rbavail = sscom_rbuf_size; 484 if (sc->sc_rbuf == NULL) { 485 printf("%s: unable to allocate ring buffer\n", 486 sc->sc_dev.dv_xname); 487 return; 488 } 489 sc->sc_ebuf = sc->sc_rbuf + (sscom_rbuf_size << 1); 490 491 tty_attach(tp); 492 493 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 494 int maj; 495 496 /* locate the major number */ 497 maj = cdevsw_lookup_major(&sscom_cdevsw); 498 499 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 500 501 printf("%s: console (major=%d)\n", sc->sc_dev.dv_xname, maj); 502 } 503 504 505 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sscomsoft, sc); 506 507 #if NRND > 0 && defined(RND_COM) 508 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 509 RND_TYPE_TTY, 0); 510 #endif 511 512 /* if there are no enable/disable functions, assume the device 513 is always enabled */ 514 515 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 516 sscom_enable_debugport(sc); 517 else 518 sscom_disable_txrxint(sc); 519 520 SET(sc->sc_hwflags, SSCOM_HW_DEV_OK); 521 } 522 523 int 524 sscom_detach(struct device *self, int flags) 525 { 526 return 0; 527 } 528 529 int 530 sscom_activate(struct device *self, enum devact act) 531 { 532 #ifdef notyet 533 struct sscom_softc *sc = (struct sscom_softc *)self; 534 int s, rv = 0; 535 536 s = splserial(); 537 SSCOM_LOCK(sc); 538 switch (act) { 539 case DVACT_ACTIVATE: 540 rv = EOPNOTSUPP; 541 break; 542 543 case DVACT_DEACTIVATE: 544 if (sc->sc_hwflags & (SSCOM_HW_CONSOLE|SSCOM_HW_KGDB)) { 545 rv = EBUSY; 546 break; 547 } 548 549 sc->enabled = 0; 550 break; 551 } 552 553 SSCOM_UNLOCK(sc); 554 splx(s); 555 return rv; 556 #else 557 return 0; 558 #endif 559 } 560 561 void 562 sscom_shutdown(struct sscom_softc *sc) 563 { 564 #ifdef notyet 565 struct tty *tp = sc->sc_tty; 566 int s; 567 568 s = splserial(); 569 SSCOM_LOCK(sc); 570 571 /* If we were asserting flow control, then deassert it. */ 572 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 573 sscom_hwiflow(sc); 574 575 /* Clear any break condition set with TIOCSBRK. */ 576 sscom_break(sc, 0); 577 578 /* 579 * Hang up if necessary. Wait a bit, so the other side has time to 580 * notice even if we immediately open the port again. 581 * Avoid tsleeping above splhigh(). 582 */ 583 if (ISSET(tp->t_cflag, HUPCL)) { 584 sscom_modem(sc, 0); 585 SSCOM_UNLOCK(sc); 586 splx(s); 587 /* XXX tsleep will only timeout */ 588 (void) tsleep(sc, TTIPRI, ttclos, hz); 589 s = splserial(); 590 SSCOM_LOCK(sc); 591 } 592 593 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 594 /* interrupt on break */ 595 sc->sc_ucon = UCON_DEBUGPORT; 596 else 597 sc->sc_ucon = 0; 598 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 599 600 #ifdef DIAGNOSTIC 601 if (!sc->enabled) 602 panic("sscom_shutdown: not enabled?"); 603 #endif 604 sc->enabled = 0; 605 SSCOM_UNLOCK(sc); 606 splx(s); 607 #endif 608 } 609 610 int 611 sscomopen(dev_t dev, int flag, int mode, struct proc *p) 612 { 613 struct sscom_softc *sc; 614 struct tty *tp; 615 int s, s2; 616 int error; 617 618 sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 619 if (sc == NULL || !ISSET(sc->sc_hwflags, SSCOM_HW_DEV_OK) || 620 sc->sc_rbuf == NULL) 621 return ENXIO; 622 623 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 624 return ENXIO; 625 626 #ifdef KGDB 627 /* 628 * If this is the kgdb port, no other use is permitted. 629 */ 630 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) 631 return EBUSY; 632 #endif 633 634 tp = sc->sc_tty; 635 636 if (ISSET(tp->t_state, TS_ISOPEN) && 637 ISSET(tp->t_state, TS_XCLUDE) && 638 p->p_ucred->cr_uid != 0) 639 return EBUSY; 640 641 s = spltty(); 642 643 /* 644 * Do the following iff this is a first open. 645 */ 646 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 647 struct termios t; 648 649 tp->t_dev = dev; 650 651 s2 = splserial(); 652 SSCOM_LOCK(sc); 653 654 /* Turn on interrupts. */ 655 sscom_enable_txrxint(sc); 656 657 /* Fetch the current modem control status, needed later. */ 658 sc->sc_msts = sc->read_modem_status(sc); 659 660 #if 0 661 /* Clear PPS capture state on first open. */ 662 sc->sc_ppsmask = 0; 663 sc->ppsparam.mode = 0; 664 #endif 665 666 SSCOM_UNLOCK(sc); 667 splx(s2); 668 669 /* 670 * Initialize the termios status to the defaults. Add in the 671 * sticky bits from TIOCSFLAGS. 672 */ 673 t.c_ispeed = 0; 674 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 675 t.c_ospeed = sscomconsrate; 676 t.c_cflag = sscomconscflag; 677 } else { 678 t.c_ospeed = TTYDEF_SPEED; 679 t.c_cflag = TTYDEF_CFLAG; 680 } 681 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 682 SET(t.c_cflag, CLOCAL); 683 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 684 SET(t.c_cflag, CRTSCTS); 685 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 686 SET(t.c_cflag, MDMBUF); 687 /* Make sure sscomparam() will do something. */ 688 tp->t_ospeed = 0; 689 (void) sscomparam(tp, &t); 690 tp->t_iflag = TTYDEF_IFLAG; 691 tp->t_oflag = TTYDEF_OFLAG; 692 tp->t_lflag = TTYDEF_LFLAG; 693 ttychars(tp); 694 ttsetwater(tp); 695 696 s2 = splserial(); 697 SSCOM_LOCK(sc); 698 699 /* 700 * Turn on DTR. We must always do this, even if carrier is not 701 * present, because otherwise we'd have to use TIOCSDTR 702 * immediately after setting CLOCAL, which applications do not 703 * expect. We always assert DTR while the device is open 704 * unless explicitly requested to deassert it. 705 */ 706 sscom_modem(sc, 1); 707 708 /* Clear the input ring, and unblock. */ 709 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 710 sc->sc_rbavail = sscom_rbuf_size; 711 sscom_iflush(sc); 712 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 713 sscom_hwiflow(sc); 714 715 if (sscom_debug) 716 sscomstatus(sc, "sscomopen "); 717 718 SSCOM_UNLOCK(sc); 719 splx(s2); 720 } 721 722 splx(s); 723 724 error = ttyopen(tp, SSCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 725 if (error) 726 goto bad; 727 728 error = (*tp->t_linesw->l_open)(dev, tp); 729 if (error) 730 goto bad; 731 732 return 0; 733 734 bad: 735 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 736 /* 737 * We failed to open the device, and nobody else had it opened. 738 * Clean up the state as appropriate. 739 */ 740 sscom_shutdown(sc); 741 } 742 743 return error; 744 } 745 746 int 747 sscomclose(dev_t dev, int flag, int mode, struct proc *p) 748 { 749 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 750 struct tty *tp = sc->sc_tty; 751 752 /* XXX This is for cons.c. */ 753 if (!ISSET(tp->t_state, TS_ISOPEN)) 754 return 0; 755 756 (*tp->t_linesw->l_close)(tp, flag); 757 ttyclose(tp); 758 759 if (SSCOM_ISALIVE(sc) == 0) 760 return 0; 761 762 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 763 /* 764 * Although we got a last close, the device may still be in 765 * use; e.g. if this was the dialout node, and there are still 766 * processes waiting for carrier on the non-dialout node. 767 */ 768 sscom_shutdown(sc); 769 } 770 771 return 0; 772 } 773 774 int 775 sscomread(dev_t dev, struct uio *uio, int flag) 776 { 777 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 778 struct tty *tp = sc->sc_tty; 779 780 if (SSCOM_ISALIVE(sc) == 0) 781 return EIO; 782 783 return (*tp->t_linesw->l_read)(tp, uio, flag); 784 } 785 786 int 787 sscomwrite(dev_t dev, struct uio *uio, int flag) 788 { 789 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 790 struct tty *tp = sc->sc_tty; 791 792 if (SSCOM_ISALIVE(sc) == 0) 793 return EIO; 794 795 return (*tp->t_linesw->l_write)(tp, uio, flag); 796 } 797 798 int 799 sscompoll(dev_t dev, int events, struct proc *p) 800 { 801 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 802 struct tty *tp = sc->sc_tty; 803 804 if (SSCOM_ISALIVE(sc) == 0) 805 return EIO; 806 807 return (*tp->t_linesw->l_poll)(tp, events, p); 808 } 809 810 struct tty * 811 sscomtty(dev_t dev) 812 { 813 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 814 struct tty *tp = sc->sc_tty; 815 816 return tp; 817 } 818 819 int 820 sscomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) 821 { 822 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 823 struct tty *tp = sc->sc_tty; 824 int error; 825 int s; 826 827 if (SSCOM_ISALIVE(sc) == 0) 828 return EIO; 829 830 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 831 if (error != EPASSTHROUGH) 832 return error; 833 834 error = ttioctl(tp, cmd, data, flag, p); 835 if (error != EPASSTHROUGH) 836 return error; 837 838 error = 0; 839 840 s = splserial(); 841 SSCOM_LOCK(sc); 842 843 switch (cmd) { 844 case TIOCSBRK: 845 sscom_break(sc, 1); 846 break; 847 848 case TIOCCBRK: 849 sscom_break(sc, 0); 850 break; 851 852 case TIOCSDTR: 853 sscom_modem(sc, 1); 854 break; 855 856 case TIOCCDTR: 857 sscom_modem(sc, 0); 858 break; 859 860 case TIOCGFLAGS: 861 *(int *)data = sc->sc_swflags; 862 break; 863 864 case TIOCSFLAGS: 865 error = suser(p->p_ucred, &p->p_acflag); 866 if (error) 867 break; 868 sc->sc_swflags = *(int *)data; 869 break; 870 871 case TIOCMSET: 872 case TIOCMBIS: 873 case TIOCMBIC: 874 tiocm_to_sscom(sc, cmd, *(int *)data); 875 break; 876 877 case TIOCMGET: 878 *(int *)data = sscom_to_tiocm(sc); 879 break; 880 881 default: 882 error = EPASSTHROUGH; 883 break; 884 } 885 886 SSCOM_UNLOCK(sc); 887 splx(s); 888 889 if (sscom_debug) 890 sscomstatus(sc, "sscomioctl "); 891 892 return error; 893 } 894 895 integrate void 896 sscom_schedrx(struct sscom_softc *sc) 897 { 898 899 sc->sc_rx_ready = 1; 900 901 /* Wake up the poller. */ 902 softintr_schedule(sc->sc_si); 903 } 904 905 static void 906 sscom_break(struct sscom_softc *sc, int onoff) 907 { 908 909 if (onoff) 910 SET(sc->sc_ucon, UCON_SBREAK); 911 else 912 CLR(sc->sc_ucon, UCON_SBREAK); 913 914 if (!sc->sc_heldchange) { 915 if (sc->sc_tx_busy) { 916 sc->sc_heldtbc = sc->sc_tbc; 917 sc->sc_tbc = 0; 918 sc->sc_heldchange = 1; 919 } else 920 sscom_loadchannelregs(sc); 921 } 922 } 923 924 static void 925 sscom_modem(struct sscom_softc *sc, int onoff) 926 { 927 if (onoff) 928 SET(sc->sc_umcon, UMCON_DTR); 929 else 930 CLR(sc->sc_umcon, UMCON_DTR); 931 932 if (!sc->sc_heldchange) { 933 if (sc->sc_tx_busy) { 934 sc->sc_heldtbc = sc->sc_tbc; 935 sc->sc_tbc = 0; 936 sc->sc_heldchange = 1; 937 } else 938 sscom_loadchannelregs(sc); 939 } 940 } 941 942 static void 943 tiocm_to_sscom(struct sscom_softc *sc, u_long how, int ttybits) 944 { 945 u_char sscombits; 946 947 sscombits = 0; 948 if (ISSET(ttybits, TIOCM_DTR)) 949 sscombits = UMCON_DTR; 950 if (ISSET(ttybits, TIOCM_RTS)) 951 SET(sscombits, UMCON_RTS); 952 953 switch (how) { 954 case TIOCMBIC: 955 CLR(sc->sc_umcon, sscombits); 956 break; 957 958 case TIOCMBIS: 959 SET(sc->sc_umcon, sscombits); 960 break; 961 962 case TIOCMSET: 963 CLR(sc->sc_umcon, UMCON_DTR); 964 SET(sc->sc_umcon, sscombits); 965 break; 966 } 967 968 if (!sc->sc_heldchange) { 969 if (sc->sc_tx_busy) { 970 sc->sc_heldtbc = sc->sc_tbc; 971 sc->sc_tbc = 0; 972 sc->sc_heldchange = 1; 973 } else 974 sscom_loadchannelregs(sc); 975 } 976 } 977 978 static int 979 sscom_to_tiocm(struct sscom_softc *sc) 980 { 981 u_char sscombits; 982 int ttybits = 0; 983 984 sscombits = sc->sc_umcon; 985 #if 0 986 if (ISSET(sscombits, MCR_DTR)) 987 SET(ttybits, TIOCM_DTR); 988 #endif 989 if (ISSET(sscombits, UMCON_RTS)) 990 SET(ttybits, TIOCM_RTS); 991 992 sscombits = sc->sc_msts; 993 if (ISSET(sscombits, MSTS_DCD)) 994 SET(ttybits, TIOCM_CD); 995 if (ISSET(sscombits, MSTS_DSR)) 996 SET(ttybits, TIOCM_DSR); 997 if (ISSET(sscombits, MSTS_CTS)) 998 SET(ttybits, TIOCM_CTS); 999 1000 if (sc->sc_ucon != 0) 1001 SET(ttybits, TIOCM_LE); 1002 1003 return ttybits; 1004 } 1005 1006 static int 1007 cflag2lcr(tcflag_t cflag) 1008 { 1009 u_char lcr = ULCON_PARITY_NONE; 1010 1011 switch (cflag & (PARENB|PARODD)) { 1012 case PARENB|PARODD: lcr = ULCON_PARITY_ODD; break; 1013 case PARENB: lcr = ULCON_PARITY_EVEN; 1014 } 1015 1016 switch (ISSET(cflag, CSIZE)) { 1017 case CS5: 1018 SET(lcr, ULCON_LENGTH_5); 1019 break; 1020 case CS6: 1021 SET(lcr, ULCON_LENGTH_6); 1022 break; 1023 case CS7: 1024 SET(lcr, ULCON_LENGTH_7); 1025 break; 1026 case CS8: 1027 SET(lcr, ULCON_LENGTH_8); 1028 break; 1029 } 1030 if (ISSET(cflag, CSTOPB)) 1031 SET(lcr, ULCON_STOP); 1032 1033 return lcr; 1034 } 1035 1036 int 1037 sscomparam(struct tty *tp, struct termios *t) 1038 { 1039 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1040 int ospeed; 1041 u_char lcr; 1042 int s; 1043 1044 if (SSCOM_ISALIVE(sc) == 0) 1045 return EIO; 1046 1047 ospeed = sscomspeed(t->c_ospeed, sc->sc_frequency); 1048 1049 /* Check requested parameters. */ 1050 if (ospeed < 0) 1051 return EINVAL; 1052 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1053 return EINVAL; 1054 1055 /* 1056 * For the console, always force CLOCAL and !HUPCL, so that the port 1057 * is always active. 1058 */ 1059 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 1060 ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 1061 SET(t->c_cflag, CLOCAL); 1062 CLR(t->c_cflag, HUPCL); 1063 } 1064 1065 /* 1066 * If there were no changes, don't do anything. This avoids dropping 1067 * input and improves performance when all we did was frob things like 1068 * VMIN and VTIME. 1069 */ 1070 if (tp->t_ospeed == t->c_ospeed && 1071 tp->t_cflag == t->c_cflag) 1072 return 0; 1073 1074 lcr = cflag2lcr(t->c_cflag); 1075 1076 s = splserial(); 1077 SSCOM_LOCK(sc); 1078 1079 sc->sc_ulcon = lcr; 1080 1081 /* 1082 * If we're not in a mode that assumes a connection is present, then 1083 * ignore carrier changes. 1084 */ 1085 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1086 sc->sc_msr_dcd = 0; 1087 else 1088 sc->sc_msr_dcd = MSTS_DCD; 1089 1090 /* 1091 * Set the flow control pins depending on the current flow control 1092 * mode. 1093 */ 1094 if (ISSET(t->c_cflag, CRTSCTS)) { 1095 sc->sc_mcr_dtr = UMCON_DTR; 1096 sc->sc_mcr_rts = UMCON_RTS; 1097 sc->sc_msr_cts = MSTS_CTS; 1098 } 1099 else if (ISSET(t->c_cflag, MDMBUF)) { 1100 /* 1101 * For DTR/DCD flow control, make sure we don't toggle DTR for 1102 * carrier detection. 1103 */ 1104 sc->sc_mcr_dtr = 0; 1105 sc->sc_mcr_rts = UMCON_DTR; 1106 sc->sc_msr_cts = MSTS_DCD; 1107 } 1108 else { 1109 /* 1110 * If no flow control, then always set RTS. This will make 1111 * the other side happy if it mistakenly thinks we're doing 1112 * RTS/CTS flow control. 1113 */ 1114 sc->sc_mcr_dtr = UMCON_DTR | UMCON_RTS; 1115 sc->sc_mcr_rts = 0; 1116 sc->sc_msr_cts = 0; 1117 if (ISSET(sc->sc_umcon, UMCON_DTR)) 1118 SET(sc->sc_umcon, UMCON_RTS); 1119 else 1120 CLR(sc->sc_umcon, UMCON_RTS); 1121 } 1122 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 1123 1124 if (ospeed == 0) 1125 CLR(sc->sc_umcon, sc->sc_mcr_dtr); 1126 else 1127 SET(sc->sc_umcon, sc->sc_mcr_dtr); 1128 1129 sc->sc_ubrdiv = ospeed; 1130 1131 /* And copy to tty. */ 1132 tp->t_ispeed = 0; 1133 tp->t_ospeed = t->c_ospeed; 1134 tp->t_cflag = t->c_cflag; 1135 1136 if (!sc->sc_heldchange) { 1137 if (sc->sc_tx_busy) { 1138 sc->sc_heldtbc = sc->sc_tbc; 1139 sc->sc_tbc = 0; 1140 sc->sc_heldchange = 1; 1141 } else 1142 sscom_loadchannelregs(sc); 1143 } 1144 1145 if (!ISSET(t->c_cflag, CHWFLOW)) { 1146 /* Disable the high water mark. */ 1147 sc->sc_r_hiwat = 0; 1148 sc->sc_r_lowat = 0; 1149 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1150 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1151 sscom_schedrx(sc); 1152 } 1153 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1154 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1155 sscom_hwiflow(sc); 1156 } 1157 } else { 1158 sc->sc_r_hiwat = sscom_rbuf_hiwat; 1159 sc->sc_r_lowat = sscom_rbuf_lowat; 1160 } 1161 1162 SSCOM_UNLOCK(sc); 1163 splx(s); 1164 1165 /* 1166 * Update the tty layer's idea of the carrier bit, in case we changed 1167 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1168 * explicit request. 1169 */ 1170 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msts, MSTS_DCD)); 1171 1172 if (sscom_debug) 1173 sscomstatus(sc, "sscomparam "); 1174 1175 if (!ISSET(t->c_cflag, CHWFLOW)) { 1176 if (sc->sc_tx_stopped) { 1177 sc->sc_tx_stopped = 0; 1178 sscomstart(tp); 1179 } 1180 } 1181 1182 return 0; 1183 } 1184 1185 static void 1186 sscom_iflush(struct sscom_softc *sc) 1187 { 1188 bus_space_tag_t iot = sc->sc_iot; 1189 bus_space_handle_t ioh = sc->sc_ioh; 1190 int timo; 1191 1192 1193 timo = 50000; 1194 /* flush any pending I/O */ 1195 while ( sscom_rxrdy(iot, ioh) && --timo) 1196 (void)sscom_getc(iot,ioh); 1197 #ifdef DIAGNOSTIC 1198 if (!timo) 1199 printf("%s: sscom_iflush timeout\n", sc->sc_dev.dv_xname); 1200 #endif 1201 } 1202 1203 static void 1204 sscom_loadchannelregs(struct sscom_softc *sc) 1205 { 1206 bus_space_tag_t iot = sc->sc_iot; 1207 bus_space_handle_t ioh = sc->sc_ioh; 1208 1209 /* XXXXX necessary? */ 1210 sscom_iflush(sc); 1211 1212 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1213 1214 #if 0 1215 if (ISSET(sc->sc_hwflags, COM_HW_FLOW)) { 1216 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1217 bus_space_write_1(iot, ioh, com_efr, sc->sc_efr); 1218 } 1219 #endif 1220 1221 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, sc->sc_ubrdiv); 1222 bus_space_write_1(iot, ioh, SSCOM_ULCON, sc->sc_ulcon); 1223 sc->set_modem_control(sc); 1224 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1225 } 1226 1227 static int 1228 sscomhwiflow(struct tty *tp, int block) 1229 { 1230 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1231 int s; 1232 1233 if (SSCOM_ISALIVE(sc) == 0) 1234 return 0; 1235 1236 if (sc->sc_mcr_rts == 0) 1237 return 0; 1238 1239 s = splserial(); 1240 SSCOM_LOCK(sc); 1241 1242 if (block) { 1243 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1244 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1245 sscom_hwiflow(sc); 1246 } 1247 } else { 1248 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1249 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1250 sscom_schedrx(sc); 1251 } 1252 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1253 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1254 sscom_hwiflow(sc); 1255 } 1256 } 1257 1258 SSCOM_UNLOCK(sc); 1259 splx(s); 1260 return 1; 1261 } 1262 1263 /* 1264 * (un)block input via hw flowcontrol 1265 */ 1266 static void 1267 sscom_hwiflow(struct sscom_softc *sc) 1268 { 1269 if (sc->sc_mcr_rts == 0) 1270 return; 1271 1272 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 1273 CLR(sc->sc_umcon, sc->sc_mcr_rts); 1274 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 1275 } else { 1276 SET(sc->sc_umcon, sc->sc_mcr_rts); 1277 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 1278 } 1279 sc->set_modem_control(sc); 1280 } 1281 1282 1283 void 1284 sscomstart(struct tty *tp) 1285 { 1286 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1287 int s; 1288 1289 if (SSCOM_ISALIVE(sc) == 0) 1290 return; 1291 1292 s = spltty(); 1293 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1294 goto out; 1295 if (sc->sc_tx_stopped) 1296 goto out; 1297 1298 if (tp->t_outq.c_cc <= tp->t_lowat) { 1299 if (ISSET(tp->t_state, TS_ASLEEP)) { 1300 CLR(tp->t_state, TS_ASLEEP); 1301 wakeup(&tp->t_outq); 1302 } 1303 selwakeup(&tp->t_wsel); 1304 if (tp->t_outq.c_cc == 0) 1305 goto out; 1306 } 1307 1308 /* Grab the first contiguous region of buffer space. */ 1309 { 1310 u_char *tba; 1311 int tbc; 1312 1313 tba = tp->t_outq.c_cf; 1314 tbc = ndqb(&tp->t_outq, 0); 1315 1316 (void)splserial(); 1317 SSCOM_LOCK(sc); 1318 1319 sc->sc_tba = tba; 1320 sc->sc_tbc = tbc; 1321 } 1322 1323 SET(tp->t_state, TS_BUSY); 1324 sc->sc_tx_busy = 1; 1325 1326 /* Output the first chunk of the contiguous buffer. */ 1327 sscom_output_chunk(sc); 1328 1329 /* Enable transmit completion interrupts if necessary. */ 1330 if ((sc->sc_hwflags & SSCOM_HW_TXINT) == 0) 1331 sscom_enable_txint(sc); 1332 1333 SSCOM_UNLOCK(sc); 1334 out: 1335 splx(s); 1336 return; 1337 } 1338 1339 /* 1340 * Stop output on a line. 1341 */ 1342 void 1343 sscomstop(struct tty *tp, int flag) 1344 { 1345 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1346 int s; 1347 1348 s = splserial(); 1349 SSCOM_LOCK(sc); 1350 if (ISSET(tp->t_state, TS_BUSY)) { 1351 /* Stop transmitting at the next chunk. */ 1352 sc->sc_tbc = 0; 1353 sc->sc_heldtbc = 0; 1354 if (!ISSET(tp->t_state, TS_TTSTOP)) 1355 SET(tp->t_state, TS_FLUSH); 1356 } 1357 SSCOM_UNLOCK(sc); 1358 splx(s); 1359 } 1360 1361 void 1362 sscomdiag(void *arg) 1363 { 1364 struct sscom_softc *sc = arg; 1365 int overflows, floods; 1366 int s; 1367 1368 s = splserial(); 1369 SSCOM_LOCK(sc); 1370 overflows = sc->sc_overflows; 1371 sc->sc_overflows = 0; 1372 floods = sc->sc_floods; 1373 sc->sc_floods = 0; 1374 sc->sc_errors = 0; 1375 SSCOM_UNLOCK(sc); 1376 splx(s); 1377 1378 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1379 sc->sc_dev.dv_xname, 1380 overflows, overflows == 1 ? "" : "s", 1381 floods, floods == 1 ? "" : "s"); 1382 } 1383 1384 integrate void 1385 sscom_rxsoft(struct sscom_softc *sc, struct tty *tp) 1386 { 1387 int (*rint) (int, struct tty *) = tp->t_linesw->l_rint; 1388 u_char *get, *end; 1389 u_int cc, scc; 1390 u_char rsr; 1391 int code; 1392 int s; 1393 1394 end = sc->sc_ebuf; 1395 get = sc->sc_rbget; 1396 scc = cc = sscom_rbuf_size - sc->sc_rbavail; 1397 1398 if (cc == sscom_rbuf_size) { 1399 sc->sc_floods++; 1400 if (sc->sc_errors++ == 0) 1401 callout_reset(&sc->sc_diag_callout, 60 * hz, 1402 sscomdiag, sc); 1403 } 1404 1405 while (cc) { 1406 code = get[0]; 1407 rsr = get[1]; 1408 if (rsr) { 1409 if (ISSET(rsr, UERSTAT_OVERRUN)) { 1410 sc->sc_overflows++; 1411 if (sc->sc_errors++ == 0) 1412 callout_reset(&sc->sc_diag_callout, 1413 60 * hz, sscomdiag, sc); 1414 } 1415 if (ISSET(rsr, UERSTAT_BREAK | UERSTAT_FRAME)) 1416 SET(code, TTY_FE); 1417 if (ISSET(rsr, UERSTAT_PARITY)) 1418 SET(code, TTY_PE); 1419 } 1420 if ((*rint)(code, tp) == -1) { 1421 /* 1422 * The line discipline's buffer is out of space. 1423 */ 1424 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1425 /* 1426 * We're either not using flow control, or the 1427 * line discipline didn't tell us to block for 1428 * some reason. Either way, we have no way to 1429 * know when there's more space available, so 1430 * just drop the rest of the data. 1431 */ 1432 get += cc << 1; 1433 if (get >= end) 1434 get -= sscom_rbuf_size << 1; 1435 cc = 0; 1436 } else { 1437 /* 1438 * Don't schedule any more receive processing 1439 * until the line discipline tells us there's 1440 * space available (through sscomhwiflow()). 1441 * Leave the rest of the data in the input 1442 * buffer. 1443 */ 1444 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1445 } 1446 break; 1447 } 1448 get += 2; 1449 if (get >= end) 1450 get = sc->sc_rbuf; 1451 cc--; 1452 } 1453 1454 if (cc != scc) { 1455 sc->sc_rbget = get; 1456 s = splserial(); 1457 SSCOM_LOCK(sc); 1458 1459 cc = sc->sc_rbavail += scc - cc; 1460 /* Buffers should be ok again, release possible block. */ 1461 if (cc >= sc->sc_r_lowat) { 1462 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1463 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1464 sscom_enable_rxint(sc); 1465 sc->sc_ucon |= UCON_ERRINT; 1466 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, 1467 sc->sc_ucon); 1468 1469 } 1470 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1471 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1472 sscom_hwiflow(sc); 1473 } 1474 } 1475 SSCOM_UNLOCK(sc); 1476 splx(s); 1477 } 1478 } 1479 1480 integrate void 1481 sscom_txsoft(struct sscom_softc *sc, struct tty *tp) 1482 { 1483 1484 CLR(tp->t_state, TS_BUSY); 1485 if (ISSET(tp->t_state, TS_FLUSH)) 1486 CLR(tp->t_state, TS_FLUSH); 1487 else 1488 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1489 (*tp->t_linesw->l_start)(tp); 1490 } 1491 1492 integrate void 1493 sscom_stsoft(struct sscom_softc *sc, struct tty *tp) 1494 { 1495 u_char msr, delta; 1496 int s; 1497 1498 s = splserial(); 1499 SSCOM_LOCK(sc); 1500 msr = sc->sc_msts; 1501 delta = sc->sc_msr_delta; 1502 sc->sc_msr_delta = 0; 1503 SSCOM_UNLOCK(sc); 1504 splx(s); 1505 1506 if (ISSET(delta, sc->sc_msr_dcd)) { 1507 /* 1508 * Inform the tty layer that carrier detect changed. 1509 */ 1510 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSTS_DCD)); 1511 } 1512 1513 if (ISSET(delta, sc->sc_msr_cts)) { 1514 /* Block or unblock output according to flow control. */ 1515 if (ISSET(msr, sc->sc_msr_cts)) { 1516 sc->sc_tx_stopped = 0; 1517 (*tp->t_linesw->l_start)(tp); 1518 } else { 1519 sc->sc_tx_stopped = 1; 1520 } 1521 } 1522 1523 if (sscom_debug) 1524 sscomstatus(sc, "sscom_stsoft"); 1525 } 1526 1527 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1528 void 1529 sscomsoft(void *arg) 1530 { 1531 struct sscom_softc *sc = arg; 1532 struct tty *tp; 1533 1534 if (SSCOM_ISALIVE(sc) == 0) 1535 return; 1536 1537 { 1538 tp = sc->sc_tty; 1539 1540 if (sc->sc_rx_ready) { 1541 sc->sc_rx_ready = 0; 1542 sscom_rxsoft(sc, tp); 1543 } 1544 1545 if (sc->sc_st_check) { 1546 sc->sc_st_check = 0; 1547 sscom_stsoft(sc, tp); 1548 } 1549 1550 if (sc->sc_tx_done) { 1551 sc->sc_tx_done = 0; 1552 sscom_txsoft(sc, tp); 1553 } 1554 } 1555 } 1556 #else 1557 #error sscom needs GENERIC_SOFT_INERRUPTS 1558 #endif 1559 1560 1561 int 1562 sscomrxintr(void *arg) 1563 { 1564 struct sscom_softc *sc = arg; 1565 bus_space_tag_t iot = sc->sc_iot; 1566 bus_space_handle_t ioh = sc->sc_ioh; 1567 u_char *put, *end; 1568 u_int cc; 1569 1570 if (SSCOM_ISALIVE(sc) == 0) 1571 return 0; 1572 1573 SSCOM_LOCK(sc); 1574 1575 end = sc->sc_ebuf; 1576 put = sc->sc_rbput; 1577 cc = sc->sc_rbavail; 1578 1579 do { 1580 u_char msts, delta; 1581 u_char uerstat; 1582 uint16_t ufstat; 1583 1584 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1585 1586 /* XXX: break interrupt with no character? */ 1587 1588 if ( (ufstat & (UFSTAT_RXCOUNT|UFSTAT_RXFULL)) && 1589 !ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1590 1591 while (cc > 0) { 1592 int cn_trapped = 0; 1593 1594 /* get status and received character. 1595 read status register first */ 1596 uerstat = sscom_geterr(iot, ioh); 1597 put[0] = sscom_getc(iot, ioh); 1598 1599 if (ISSET(uerstat, UERSTAT_BREAK)) { 1600 int cn_trapped = 0; 1601 cn_check_magic(sc->sc_tty->t_dev, 1602 CNC_BREAK, sscom_cnm_state); 1603 if (cn_trapped) 1604 continue; 1605 #if defined(KGDB) 1606 if (ISSET(sc->sc_hwflags, 1607 SSCOM_HW_KGDB)) { 1608 kgdb_connect(1); 1609 continue; 1610 } 1611 #endif 1612 } 1613 1614 put[1] = uerstat; 1615 cn_check_magic(sc->sc_tty->t_dev, 1616 put[0], sscom_cnm_state); 1617 if (!cn_trapped) { 1618 put += 2; 1619 if (put >= end) 1620 put = sc->sc_rbuf; 1621 cc--; 1622 } 1623 1624 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1625 if ( (ufstat & (UFSTAT_RXFULL|UFSTAT_RXCOUNT)) == 0 ) 1626 break; 1627 } 1628 1629 /* 1630 * Current string of incoming characters ended because 1631 * no more data was available or we ran out of space. 1632 * Schedule a receive event if any data was received. 1633 * If we're out of space, turn off receive interrupts. 1634 */ 1635 sc->sc_rbput = put; 1636 sc->sc_rbavail = cc; 1637 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1638 sc->sc_rx_ready = 1; 1639 1640 /* 1641 * See if we are in danger of overflowing a buffer. If 1642 * so, use hardware flow control to ease the pressure. 1643 */ 1644 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1645 cc < sc->sc_r_hiwat) { 1646 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1647 sscom_hwiflow(sc); 1648 } 1649 1650 /* 1651 * If we're out of space, disable receive interrupts 1652 * until the queue has drained a bit. 1653 */ 1654 if (!cc) { 1655 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1656 sscom_disable_rxint(sc); 1657 sc->sc_ucon &= ~UCON_ERRINT; 1658 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1659 } 1660 } 1661 1662 1663 msts = sc->read_modem_status(sc); 1664 delta = msts ^ sc->sc_msts; 1665 sc->sc_msts = msts; 1666 1667 #ifdef notyet 1668 /* 1669 * Pulse-per-second (PSS) signals on edge of DCD? 1670 * Process these even if line discipline is ignoring DCD. 1671 */ 1672 if (delta & sc->sc_ppsmask) { 1673 struct timeval tv; 1674 if ((msr & sc->sc_ppsmask) == sc->sc_ppsassert) { 1675 /* XXX nanotime() */ 1676 microtime(&tv); 1677 TIMEVAL_TO_TIMESPEC(&tv, 1678 &sc->ppsinfo.assert_timestamp); 1679 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1680 timespecadd(&sc->ppsinfo.assert_timestamp, 1681 &sc->ppsparam.assert_offset, 1682 &sc->ppsinfo.assert_timestamp); 1683 } 1684 1685 #ifdef PPS_SYNC 1686 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1687 hardpps(&tv, tv.tv_usec); 1688 #endif 1689 sc->ppsinfo.assert_sequence++; 1690 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1691 1692 } else if ((msr & sc->sc_ppsmask) == sc->sc_ppsclear) { 1693 /* XXX nanotime() */ 1694 microtime(&tv); 1695 TIMEVAL_TO_TIMESPEC(&tv, 1696 &sc->ppsinfo.clear_timestamp); 1697 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1698 timespecadd(&sc->ppsinfo.clear_timestamp, 1699 &sc->ppsparam.clear_offset, 1700 &sc->ppsinfo.clear_timestamp); 1701 } 1702 1703 #ifdef PPS_SYNC 1704 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1705 hardpps(&tv, tv.tv_usec); 1706 #endif 1707 sc->ppsinfo.clear_sequence++; 1708 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1709 } 1710 } 1711 #endif 1712 1713 /* 1714 * Process normal status changes 1715 */ 1716 if (ISSET(delta, sc->sc_msr_mask)) { 1717 SET(sc->sc_msr_delta, delta); 1718 1719 /* 1720 * Stop output immediately if we lose the output 1721 * flow control signal or carrier detect. 1722 */ 1723 if (ISSET(~msts, sc->sc_msr_mask)) { 1724 sc->sc_tbc = 0; 1725 sc->sc_heldtbc = 0; 1726 #ifdef SSCOM_DEBUG 1727 if (sscom_debug) 1728 sscomstatus(sc, "sscomintr "); 1729 #endif 1730 } 1731 1732 sc->sc_st_check = 1; 1733 } 1734 1735 /* 1736 * Done handling any receive interrupts. 1737 */ 1738 1739 /* 1740 * If we've delayed a parameter change, do it 1741 * now, and restart * output. 1742 */ 1743 if ((ufstat & UFSTAT_TXCOUNT) == 0) { 1744 /* XXX: we should check transmitter empty also */ 1745 1746 if (sc->sc_heldchange) { 1747 sscom_loadchannelregs(sc); 1748 sc->sc_heldchange = 0; 1749 sc->sc_tbc = sc->sc_heldtbc; 1750 sc->sc_heldtbc = 0; 1751 } 1752 } 1753 1754 1755 } while (0); 1756 1757 SSCOM_UNLOCK(sc); 1758 1759 /* Wake up the poller. */ 1760 softintr_schedule(sc->sc_si); 1761 1762 #if NRND > 0 && defined(RND_COM) 1763 rnd_add_uint32(&sc->rnd_source, iir | rsr); 1764 #endif 1765 1766 return 1; 1767 } 1768 1769 int 1770 sscomtxintr(void *arg) 1771 { 1772 struct sscom_softc *sc = arg; 1773 bus_space_tag_t iot = sc->sc_iot; 1774 bus_space_handle_t ioh = sc->sc_ioh; 1775 uint16_t ufstat; 1776 1777 if (SSCOM_ISALIVE(sc) == 0) 1778 return 0; 1779 1780 SSCOM_LOCK(sc); 1781 1782 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1783 1784 /* 1785 * If we've delayed a parameter change, do it 1786 * now, and restart * output. 1787 */ 1788 if (sc->sc_heldchange && (ufstat & UFSTAT_TXCOUNT) == 0) { 1789 /* XXX: we should check transmitter empty also */ 1790 sscom_loadchannelregs(sc); 1791 sc->sc_heldchange = 0; 1792 sc->sc_tbc = sc->sc_heldtbc; 1793 sc->sc_heldtbc = 0; 1794 } 1795 1796 /* 1797 * See if data can be transmitted as well. Schedule tx 1798 * done event if no data left and tty was marked busy. 1799 */ 1800 if (!ISSET(ufstat,UFSTAT_TXFULL)) { 1801 /* 1802 * Output the next chunk of the contiguous 1803 * buffer, if any. 1804 */ 1805 if (sc->sc_tbc > 0) { 1806 __sscom_output_chunk(sc, ufstat); 1807 } 1808 else { 1809 /* 1810 * Disable transmit sscompletion 1811 * interrupts if necessary. 1812 */ 1813 if (sc->sc_hwflags & SSCOM_HW_TXINT) 1814 sscom_disable_txint(sc); 1815 if (sc->sc_tx_busy) { 1816 sc->sc_tx_busy = 0; 1817 sc->sc_tx_done = 1; 1818 } 1819 } 1820 } 1821 1822 SSCOM_UNLOCK(sc); 1823 1824 /* Wake up the poller. */ 1825 softintr_schedule(sc->sc_si); 1826 1827 #if NRND > 0 && defined(RND_COM) 1828 rnd_add_uint32(&sc->rnd_source, iir | rsr); 1829 #endif 1830 1831 return 1; 1832 } 1833 1834 1835 #if defined(KGDB) || defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1836 /* 1837 * Initialize UART for use as console or KGDB line. 1838 */ 1839 static int 1840 sscom_init(bus_space_tag_t iot, const struct sscom_uart_info *config, 1841 int rate, int frequency, tcflag_t cflag, bus_space_handle_t *iohp) 1842 { 1843 bus_space_handle_t ioh; 1844 bus_addr_t iobase = config->iobase; 1845 1846 if (bus_space_map(iot, iobase, SSCOM_SIZE, 0, &ioh)) 1847 return ENOMEM; /* ??? */ 1848 1849 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1850 bus_space_write_1(iot, ioh, SSCOM_UFCON, 1851 UFCON_TXTRIGGER_8 | UFCON_RXTRIGGER_8 | 1852 UFCON_TXFIFO_RESET | UFCON_RXFIFO_RESET | 1853 UFCON_FIFO_ENABLE ); 1854 /* tx/rx fifo reset are auto-cleared */ 1855 1856 rate = sscomspeed(rate, frequency); 1857 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, rate); 1858 bus_space_write_2(iot, ioh, SSCOM_ULCON, cflag2lcr(cflag)); 1859 1860 /* enable UART */ 1861 bus_space_write_2(iot, ioh, SSCOM_UCON, 1862 UCON_TXMODE_INT|UCON_RXMODE_INT); 1863 bus_space_write_2(iot, ioh, SSCOM_UMCON, UMCON_RTS); 1864 1865 *iohp = ioh; 1866 return 0; 1867 } 1868 1869 #endif 1870 1871 #if defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1872 /* 1873 * Following are all routines needed for SSCOM to act as console 1874 */ 1875 struct consdev sscomcons = { 1876 NULL, NULL, sscomcngetc, sscomcnputc, sscomcnpollc, NULL, 1877 NULL, NULL, NODEV, CN_NORMAL 1878 }; 1879 1880 1881 int 1882 sscom_cnattach(bus_space_tag_t iot, const struct sscom_uart_info *config, 1883 int rate, int frequency, tcflag_t cflag) 1884 { 1885 int res; 1886 1887 res = sscom_init(iot, config, rate, frequency, cflag, &sscomconsioh); 1888 if (res) 1889 return res; 1890 1891 cn_tab = &sscomcons; 1892 cn_init_magic(&sscom_cnm_state); 1893 cn_set_magic("\047\001"); /* default magic is BREAK */ 1894 1895 sscomconstag = iot; 1896 sscomconsunit = config->unit; 1897 sscomconsrate = rate; 1898 sscomconscflag = cflag; 1899 1900 return 0; 1901 } 1902 1903 void 1904 sscom_cndetach(void) 1905 { 1906 bus_space_unmap(sscomconstag, sscomconsioh, SSCOM_SIZE); 1907 sscomconstag = NULL; 1908 1909 cn_tab = NULL; 1910 } 1911 1912 /* 1913 * The read-ahead code is so that you can detect pending in-band 1914 * cn_magic in polled mode while doing output rather than having to 1915 * wait until the kernel decides it needs input. 1916 */ 1917 1918 #define MAX_READAHEAD 20 1919 static int sscom_readahead[MAX_READAHEAD]; 1920 static int sscom_readaheadcount = 0; 1921 1922 int 1923 sscomcngetc(dev_t dev) 1924 { 1925 int s = splserial(); 1926 u_char stat, c; 1927 1928 /* got a character from reading things earlier */ 1929 if (sscom_readaheadcount > 0) { 1930 int i; 1931 1932 c = sscom_readahead[0]; 1933 for (i = 1; i < sscom_readaheadcount; i++) { 1934 sscom_readahead[i-1] = sscom_readahead[i]; 1935 } 1936 sscom_readaheadcount--; 1937 splx(s); 1938 return c; 1939 } 1940 1941 /* block until a character becomes available */ 1942 while (!sscom_rxrdy(sscomconstag, sscomconsioh)) 1943 ; 1944 1945 c = sscom_getc(sscomconstag, sscomconsioh); 1946 stat = sscom_geterr(sscomconstag, sscomconsioh); 1947 { 1948 int cn_trapped = 0; /* unused */ 1949 #ifdef DDB 1950 extern int db_active; 1951 if (!db_active) 1952 #endif 1953 cn_check_magic(dev, c, sscom_cnm_state); 1954 } 1955 splx(s); 1956 return c; 1957 } 1958 1959 /* 1960 * Console kernel output character routine. 1961 */ 1962 void 1963 sscomcnputc(dev_t dev, int c) 1964 { 1965 int s = splserial(); 1966 int timo; 1967 1968 int cin, stat; 1969 if (sscom_readaheadcount < MAX_READAHEAD && 1970 sscom_rxrdy(sscomconstag, sscomconsioh)) { 1971 1972 int cn_trapped = 0; 1973 cin = sscom_getc(sscomconstag, sscomconsioh); 1974 stat = sscom_geterr(sscomconstag, sscomconsioh); 1975 cn_check_magic(dev, cin, sscom_cnm_state); 1976 sscom_readahead[sscom_readaheadcount++] = cin; 1977 } 1978 1979 /* wait for any pending transmission to finish */ 1980 timo = 150000; 1981 while (ISSET(bus_space_read_2(sscomconstag, sscomconsioh, SSCOM_UFSTAT), 1982 UFSTAT_TXFULL) && --timo) 1983 continue; 1984 1985 bus_space_write_1(sscomconstag, sscomconsioh, SSCOM_UTXH, c); 1986 SSCOM_BARRIER(sscomconstag, sscomconsioh, BR | BW); 1987 1988 #if 0 1989 /* wait for this transmission to complete */ 1990 timo = 1500000; 1991 while (!ISSET(bus_space_read_1(sscomconstag, sscomconsioh, SSCOM_UTRSTAT), 1992 UTRSTAT_TXEMPTY) && --timo) 1993 continue; 1994 #endif 1995 splx(s); 1996 } 1997 1998 void 1999 sscomcnpollc(dev_t dev, int on) 2000 { 2001 2002 } 2003 2004 #endif /* SSCOM0CONSOLE||SSCOM1CONSOLE */ 2005 2006 #ifdef KGDB 2007 int 2008 sscom_kgdb_attach(bus_space_tag_t iot, const struct sscom_uart_info *config, 2009 int rate, int frequency, tcflag_t cflag) 2010 { 2011 int res; 2012 2013 if (iot == sscomconstag && config->unit == sscomconsunit) { 2014 printf( "console==kgdb_port (%d): kgdb disabled\n", sscomconsunit); 2015 return EBUSY; /* cannot share with console */ 2016 } 2017 2018 res = sscom_init(iot, config, rate, frequency, cflag, &sscom_kgdb_ioh); 2019 if (res) 2020 return res; 2021 2022 kgdb_attach(sscom_kgdb_getc, sscom_kgdb_putc, NULL); 2023 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 2024 2025 sscom_kgdb_iot = iot; 2026 sscom_kgdb_unit = config->unit; 2027 2028 return 0; 2029 } 2030 2031 /* ARGSUSED */ 2032 int 2033 sscom_kgdb_getc(void *arg) 2034 { 2035 int c, stat; 2036 2037 /* block until a character becomes available */ 2038 while (!sscom_rxrdy(sscom_kgdb_iot, sscom_kgdb_ioh)) 2039 ; 2040 2041 c = sscom_getc(sscom_kgdb_iot, sscom_kgdb_ioh); 2042 stat = sscom_geterr(sscom_kgdb_iot, sscom_kgdb_ioh); 2043 2044 return c; 2045 } 2046 2047 /* ARGSUSED */ 2048 void 2049 sscom_kgdb_putc(void *arg, int c) 2050 { 2051 int timo; 2052 2053 /* wait for any pending transmission to finish */ 2054 timo = 150000; 2055 while (ISSET(bus_space_read_2(sscom_kgdb_iot, sscom_kgdb_ioh, 2056 SSCOM_UFSTAT), UFSTAT_TXFULL) && --timo) 2057 continue; 2058 2059 bus_space_write_1(sscom_kgdb_iot, sscom_kgdb_ioh, SSCOM_UTXH, c); 2060 SSCOM_BARRIER(sscom_kgdb_iot, sscom_kgdb_ioh, BR | BW); 2061 2062 #if 0 2063 /* wait for this transmission to complete */ 2064 timo = 1500000; 2065 while (!ISSET(bus_space_read_1(sscom_kgdb_iot, sscom_kgdb_ioh, 2066 SSCOM_UTRSTAT), UTRSTAT_TXEMPTY) && --timo) 2067 continue; 2068 #endif 2069 } 2070 #endif /* KGDB */ 2071 2072 /* helper function to identify the sscom ports used by 2073 console or KGDB (and not yet autoconf attached) */ 2074 int 2075 sscom_is_console(bus_space_tag_t iot, int unit, 2076 bus_space_handle_t *ioh) 2077 { 2078 bus_space_handle_t help; 2079 2080 if (!sscomconsattached && 2081 iot == sscomconstag && unit == sscomconsunit) 2082 help = sscomconsioh; 2083 #ifdef KGDB 2084 else if (!sscom_kgdb_attached && 2085 iot == sscom_kgdb_iot && unit == sscom_kgdb_unit) 2086 help = sscom_kgdb_ioh; 2087 #endif 2088 else 2089 return 0; 2090 2091 if (ioh) 2092 *ioh = help; 2093 return 1; 2094 } 2095
Indexes created Sun Sep 28 16:09:52 GMT 2025