sscom.c revision 1.18
1 /* $NetBSD: sscom.c,v 1.18 2006/05/14 21:55:10 elad 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. Neither the name of the University nor the names of its contributors 84 * may be used to endorse or promote products derived from this software 85 * without specific prior written permission. 86 * 87 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 88 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 89 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 90 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 91 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 92 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 93 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 94 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 95 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 96 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 97 * SUCH DAMAGE. 98 * 99 * @(#)com.c 7.5 (Berkeley) 5/16/91 100 */ 101 102 /* 103 * Support integrated UARTs of Samsung S3C2800/2400X/2410X 104 * Derived from sys/dev/ic/com.c 105 */ 106 107 #include <sys/cdefs.h> 108 __KERNEL_RCSID(0, "$NetBSD: sscom.c,v 1.18 2006/05/14 21:55:10 elad Exp $"); 109 110 #include "opt_sscom.h" 111 #include "opt_ddb.h" 112 #include "opt_kgdb.h" 113 #include "opt_multiprocessor.h" 114 #include "opt_lockdebug.h" 115 116 #include "rnd.h" 117 #if NRND > 0 && defined(RND_COM) 118 #include <sys/rnd.h> 119 #endif 120 121 /* 122 * Override cnmagic(9) macro before including <sys/systm.h>. 123 * We need to know if cn_check_magic triggered debugger, so set a flag. 124 * Callers of cn_check_magic must declare int cn_trapped = 0; 125 * XXX: this is *ugly*! 126 */ 127 #define cn_trap() \ 128 do { \ 129 console_debugger(); \ 130 cn_trapped = 1; \ 131 } while (/* CONSTCOND */ 0) 132 133 #include <sys/param.h> 134 #include <sys/systm.h> 135 #include <sys/ioctl.h> 136 #include <sys/select.h> 137 #include <sys/tty.h> 138 #include <sys/proc.h> 139 #include <sys/user.h> 140 #include <sys/conf.h> 141 #include <sys/file.h> 142 #include <sys/uio.h> 143 #include <sys/kernel.h> 144 #include <sys/syslog.h> 145 #include <sys/types.h> 146 #include <sys/device.h> 147 #include <sys/malloc.h> 148 #include <sys/timepps.h> 149 #include <sys/vnode.h> 150 #include <sys/kauth.h> 151 152 #include <machine/intr.h> 153 #include <machine/bus.h> 154 155 #include <arm/s3c2xx0/s3c2xx0reg.h> 156 #include <arm/s3c2xx0/s3c2xx0var.h> 157 #if defined(SSCOM_S3C2410) || defined(SSCOM_S3C2400) 158 #include <arm/s3c2xx0/s3c24x0reg.h> 159 #elif defined(SSCOM_S3C2800) 160 #include <arm/s3c2xx0/s3c2800reg.h> 161 #endif 162 #include <arm/s3c2xx0/sscom_var.h> 163 #include <dev/cons.h> 164 165 dev_type_open(sscomopen); 166 dev_type_close(sscomclose); 167 dev_type_read(sscomread); 168 dev_type_write(sscomwrite); 169 dev_type_ioctl(sscomioctl); 170 dev_type_stop(sscomstop); 171 dev_type_tty(sscomtty); 172 dev_type_poll(sscompoll); 173 174 int sscomcngetc (dev_t); 175 void sscomcnputc (dev_t, int); 176 void sscomcnpollc (dev_t, int); 177 178 #define integrate static inline 179 void sscomsoft (void *); 180 181 integrate void sscom_rxsoft (struct sscom_softc *, struct tty *); 182 integrate void sscom_txsoft (struct sscom_softc *, struct tty *); 183 integrate void sscom_stsoft (struct sscom_softc *, struct tty *); 184 integrate void sscom_schedrx (struct sscom_softc *); 185 static void sscom_modem(struct sscom_softc *, int); 186 static void sscom_break(struct sscom_softc *, int); 187 static void sscom_iflush(struct sscom_softc *); 188 static void sscom_hwiflow(struct sscom_softc *); 189 static void sscom_loadchannelregs(struct sscom_softc *); 190 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 191 static int sscom_to_tiocm(struct sscom_softc *); 192 static void tiocm_to_sscom(struct sscom_softc *, u_long, int); 193 static int sscom_to_tiocm(struct sscom_softc *); 194 static void sscom_iflush(struct sscom_softc *); 195 196 static int sscomhwiflow(struct tty *tp, int block); 197 static int sscom_init(bus_space_tag_t, const struct sscom_uart_info *, 198 int, int, tcflag_t, bus_space_handle_t *); 199 200 extern struct cfdriver sscom_cd; 201 202 const struct cdevsw sscom_cdevsw = { 203 sscomopen, sscomclose, sscomread, sscomwrite, sscomioctl, 204 sscomstop, sscomtty, sscompoll, nommap, ttykqfilter, D_TTY 205 }; 206 207 /* 208 * Make this an option variable one can patch. 209 * But be warned: this must be a power of 2! 210 */ 211 u_int sscom_rbuf_size = SSCOM_RING_SIZE; 212 213 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 214 u_int sscom_rbuf_hiwat = (SSCOM_RING_SIZE * 1) / 4; 215 u_int sscom_rbuf_lowat = (SSCOM_RING_SIZE * 3) / 4; 216 217 static int sscomconsunit = -1; 218 static bus_space_tag_t sscomconstag; 219 static bus_space_handle_t sscomconsioh; 220 static int sscomconsattached; 221 static int sscomconsrate; 222 static tcflag_t sscomconscflag; 223 static struct cnm_state sscom_cnm_state; 224 225 #ifdef KGDB 226 #include <sys/kgdb.h> 227 228 static int sscom_kgdb_unit = -1; 229 static bus_space_tag_t sscom_kgdb_iot; 230 static bus_space_handle_t sscom_kgdb_ioh; 231 static int sscom_kgdb_attached; 232 233 int sscom_kgdb_getc (void *); 234 void sscom_kgdb_putc (void *, int); 235 #endif /* KGDB */ 236 237 #define SSCOMUNIT_MASK 0x7f 238 #define SSCOMDIALOUT_MASK 0x80 239 240 #define SSCOMUNIT(x) (minor(x) & SSCOMUNIT_MASK) 241 #define SSCOMDIALOUT(x) (minor(x) & SSCOMDIALOUT_MASK) 242 243 #if 0 244 #define SSCOM_ISALIVE(sc) ((sc)->enabled != 0 && \ 245 device_is_active(&(sc)->sc_dev)) 246 #else 247 #define SSCOM_ISALIVE(sc) device_is_active(&(sc)->sc_dev) 248 #endif 249 250 #define BR BUS_SPACE_BARRIER_READ 251 #define BW BUS_SPACE_BARRIER_WRITE 252 #define SSCOM_BARRIER(t, h, f) /* no-op */ 253 254 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 255 256 #define SSCOM_LOCK(sc) simple_lock(&(sc)->sc_lock) 257 #define SSCOM_UNLOCK(sc) simple_unlock(&(sc)->sc_lock) 258 259 #else 260 261 #define SSCOM_LOCK(sc) 262 #define SSCOM_UNLOCK(sc) 263 264 #endif 265 266 #ifndef SSCOM_TOLERANCE 267 #define SSCOM_TOLERANCE 30 /* XXX: baud rate tolerance, in 0.1% units */ 268 #endif 269 270 /* value for UCON */ 271 #define UCON_RXINT_MASK \ 272 (UCON_RXMODE_MASK|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE) 273 #define UCON_RXINT_ENABLE \ 274 (UCON_RXMODE_INT|UCON_ERRINT|UCON_TOINT|UCON_RXINT_TYPE_LEVEL) 275 #define UCON_TXINT_MASK (UCON_TXMODE_MASK|UCON_TXINT_TYPE) 276 #define UCON_TXINT_ENABLE (UCON_TXMODE_INT|UCON_TXINT_TYPE_LEVEL) 277 278 /* we don't want tx interrupt on debug port, but it is needed to 279 have transmitter active */ 280 #define UCON_DEBUGPORT (UCON_RXINT_ENABLE|UCON_TXINT_ENABLE) 281 282 283 static inline void 284 __sscom_output_chunk(struct sscom_softc *sc, int ufstat) 285 { 286 int n, space; 287 bus_space_tag_t iot = sc->sc_iot; 288 bus_space_handle_t ioh = sc->sc_ioh; 289 290 n = sc->sc_tbc; 291 space = 16 - ((ufstat & UFSTAT_TXCOUNT) >> UFSTAT_TXCOUNT_SHIFT); 292 293 if (n > space) 294 n = space; 295 296 if (n > 0) { 297 bus_space_write_multi_1(iot, ioh, SSCOM_UTXH, sc->sc_tba, n); 298 sc->sc_tbc -= n; 299 sc->sc_tba += n; 300 } 301 } 302 303 static void 304 sscom_output_chunk(struct sscom_softc *sc) 305 { 306 int ufstat = bus_space_read_2(sc->sc_iot, sc->sc_ioh, SSCOM_UFSTAT); 307 308 if (!(ufstat & UFSTAT_TXFULL)) 309 __sscom_output_chunk(sc, ufstat); 310 } 311 312 int 313 sscomspeed(long speed, long frequency) 314 { 315 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 316 317 int x, err; 318 319 if (speed <= 0) 320 return -1; 321 x = divrnd(frequency / 16, speed); 322 if (x <= 0) 323 return -1; 324 err = divrnd(((quad_t)frequency) * 1000 / 16, speed * x) - 1000; 325 if (err < 0) 326 err = -err; 327 if (err > SSCOM_TOLERANCE) 328 return -1; 329 return x-1; 330 331 #undef divrnd 332 } 333 334 void sscomstatus (struct sscom_softc *, const char *); 335 336 #ifdef SSCOM_DEBUG 337 int sscom_debug = 0; 338 339 void 340 sscomstatus(struct sscom_softc *sc, const char *str) 341 { 342 struct tty *tp = sc->sc_tty; 343 int umstat = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMSTAT); 344 int umcon = bus_space_read_1(sc->sc_iot, sc->sc_iot, SSCOM_UMCON); 345 346 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 347 sc->sc_dev.dv_xname, str, 348 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 349 "+", /* DCD */ 350 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 351 "+", /* DTR */ 352 sc->sc_tx_stopped ? "+" : "-"); 353 354 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 355 sc->sc_dev.dv_xname, str, 356 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 357 ISSET(umstat, UMSTAT_CTS) ? "+" : "-", 358 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 359 ISSET(umcon, UMCON_RTS) ? "+" : "-", 360 sc->sc_rx_flags); 361 } 362 #else 363 #define sscom_debug 0 364 #endif 365 366 static void 367 sscom_enable_debugport(struct sscom_softc *sc) 368 { 369 int s; 370 371 /* Turn on line break interrupt, set carrier. */ 372 s = splserial(); 373 SSCOM_LOCK(sc); 374 sc->sc_ucon = UCON_DEBUGPORT; 375 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 376 sc->sc_umcon = UMCON_RTS|UMCON_DTR; 377 sc->set_modem_control(sc); 378 sscom_enable_rxint(sc); 379 sscom_disable_txint(sc); 380 SSCOM_UNLOCK(sc); 381 splx(s); 382 } 383 384 static void 385 sscom_set_modem_control(struct sscom_softc *sc) 386 { 387 /* flob RTS */ 388 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 389 SSCOM_UMCON, sc->sc_umcon & UMCON_HW_MASK); 390 /* ignore DTR */ 391 } 392 393 static int 394 sscom_read_modem_status(struct sscom_softc *sc) 395 { 396 int msts; 397 398 msts = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SSCOM_UMSTAT); 399 400 /* DCD and DSR are always on */ 401 return (msts & UMSTAT_CTS) | MSTS_DCD | MSTS_DSR; 402 } 403 404 void 405 sscom_attach_subr(struct sscom_softc *sc) 406 { 407 int unit = sc->sc_unit; 408 bus_space_tag_t iot = sc->sc_iot; 409 bus_space_handle_t ioh = sc->sc_ioh; 410 struct tty *tp; 411 412 callout_init(&sc->sc_diag_callout); 413 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(SSCOM_MPLOCK) 414 simple_lock_init(&sc->sc_lock); 415 #endif 416 417 sc->sc_ucon = UCON_RXINT_ENABLE|UCON_TXINT_ENABLE; 418 419 /* 420 * set default for modem control hook 421 */ 422 if (sc->set_modem_control == NULL) 423 sc->set_modem_control = sscom_set_modem_control; 424 if (sc->read_modem_status == NULL) 425 sc->read_modem_status = sscom_read_modem_status; 426 427 /* Disable interrupts before configuring the device. */ 428 sscom_disable_txrxint(sc); 429 430 #ifdef KGDB 431 /* 432 * Allow kgdb to "take over" this port. If this is 433 * the kgdb device, it has exclusive use. 434 */ 435 if (unit == sscom_kgdb_unit) { 436 SET(sc->sc_hwflags, SSCOM_HW_KGDB); 437 sc->sc_ucon = UCON_DEBUGPORT; 438 } 439 #endif 440 441 if (unit == sscomconsunit) { 442 sscomconsattached = 1; 443 444 sscomconstag = iot; 445 sscomconsioh = ioh; 446 447 /* Make sure the console is always "hardwired". */ 448 delay(1000); /* XXX: wait for output to finish */ 449 SET(sc->sc_hwflags, SSCOM_HW_CONSOLE); 450 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 451 452 sc->sc_ucon = UCON_DEBUGPORT; 453 } 454 455 bus_space_write_1(iot, ioh, SSCOM_UFCON, 456 UFCON_TXTRIGGER_8|UFCON_RXTRIGGER_8|UFCON_FIFO_ENABLE| 457 UFCON_TXFIFO_RESET|UFCON_RXFIFO_RESET); 458 459 bus_space_write_1(iot, ioh, SSCOM_UCON, sc->sc_ucon); 460 461 #ifdef KGDB 462 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) { 463 sscom_kgdb_attached = 1; 464 printf("%s: kgdb\n", sc->sc_dev.dv_xname); 465 sscom_enable_debugport(sc); 466 return; 467 } 468 #endif 469 470 471 472 tp = ttymalloc(); 473 tp->t_oproc = sscomstart; 474 tp->t_param = sscomparam; 475 tp->t_hwiflow = sscomhwiflow; 476 477 sc->sc_tty = tp; 478 sc->sc_rbuf = malloc(sscom_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 479 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 480 sc->sc_rbavail = sscom_rbuf_size; 481 if (sc->sc_rbuf == NULL) { 482 printf("%s: unable to allocate ring buffer\n", 483 sc->sc_dev.dv_xname); 484 return; 485 } 486 sc->sc_ebuf = sc->sc_rbuf + (sscom_rbuf_size << 1); 487 488 tty_attach(tp); 489 490 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 491 int maj; 492 493 /* locate the major number */ 494 maj = cdevsw_lookup_major(&sscom_cdevsw); 495 496 cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev)); 497 498 printf("%s: console (major=%d)\n", sc->sc_dev.dv_xname, maj); 499 } 500 501 502 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sscomsoft, sc); 503 504 #if NRND > 0 && defined(RND_COM) 505 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 506 RND_TYPE_TTY, 0); 507 #endif 508 509 /* if there are no enable/disable functions, assume the device 510 is always enabled */ 511 512 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 513 sscom_enable_debugport(sc); 514 else 515 sscom_disable_txrxint(sc); 516 517 SET(sc->sc_hwflags, SSCOM_HW_DEV_OK); 518 } 519 520 int 521 sscom_detach(struct device *self, int flags) 522 { 523 return 0; 524 } 525 526 int 527 sscom_activate(struct device *self, enum devact act) 528 { 529 #ifdef notyet 530 struct sscom_softc *sc = (struct sscom_softc *)self; 531 int s, rv = 0; 532 533 s = splserial(); 534 SSCOM_LOCK(sc); 535 switch (act) { 536 case DVACT_ACTIVATE: 537 rv = EOPNOTSUPP; 538 break; 539 540 case DVACT_DEACTIVATE: 541 if (sc->sc_hwflags & (SSCOM_HW_CONSOLE|SSCOM_HW_KGDB)) { 542 rv = EBUSY; 543 break; 544 } 545 546 sc->enabled = 0; 547 break; 548 } 549 550 SSCOM_UNLOCK(sc); 551 splx(s); 552 return rv; 553 #else 554 return 0; 555 #endif 556 } 557 558 void 559 sscom_shutdown(struct sscom_softc *sc) 560 { 561 #ifdef notyet 562 struct tty *tp = sc->sc_tty; 563 int s; 564 565 s = splserial(); 566 SSCOM_LOCK(sc); 567 568 /* If we were asserting flow control, then deassert it. */ 569 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 570 sscom_hwiflow(sc); 571 572 /* Clear any break condition set with TIOCSBRK. */ 573 sscom_break(sc, 0); 574 575 /* 576 * Hang up if necessary. Wait a bit, so the other side has time to 577 * notice even if we immediately open the port again. 578 * Avoid tsleeping above splhigh(). 579 */ 580 if (ISSET(tp->t_cflag, HUPCL)) { 581 sscom_modem(sc, 0); 582 SSCOM_UNLOCK(sc); 583 splx(s); 584 /* XXX tsleep will only timeout */ 585 (void) tsleep(sc, TTIPRI, ttclos, hz); 586 s = splserial(); 587 SSCOM_LOCK(sc); 588 } 589 590 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) 591 /* interrupt on break */ 592 sc->sc_ucon = UCON_DEBUGPORT; 593 else 594 sc->sc_ucon = 0; 595 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, sc->sc_ucon); 596 597 #ifdef DIAGNOSTIC 598 if (!sc->enabled) 599 panic("sscom_shutdown: not enabled?"); 600 #endif 601 sc->enabled = 0; 602 SSCOM_UNLOCK(sc); 603 splx(s); 604 #endif 605 } 606 607 int 608 sscomopen(dev_t dev, int flag, int mode, struct lwp *l) 609 { 610 struct sscom_softc *sc; 611 struct tty *tp; 612 int s, s2; 613 int error; 614 615 sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 616 if (sc == NULL || !ISSET(sc->sc_hwflags, SSCOM_HW_DEV_OK) || 617 sc->sc_rbuf == NULL) 618 return ENXIO; 619 620 if (!device_is_active(&sc->sc_dev)) 621 return ENXIO; 622 623 #ifdef KGDB 624 /* 625 * If this is the kgdb port, no other use is permitted. 626 */ 627 if (ISSET(sc->sc_hwflags, SSCOM_HW_KGDB)) 628 return EBUSY; 629 #endif 630 631 tp = sc->sc_tty; 632 633 if (ISSET(tp->t_state, TS_ISOPEN) && 634 ISSET(tp->t_state, TS_XCLUDE) && 635 kauth_authorize_generic(l->l_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag) != 0) 636 return EBUSY; 637 638 s = spltty(); 639 640 /* 641 * Do the following iff this is a first open. 642 */ 643 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 644 struct termios t; 645 646 tp->t_dev = dev; 647 648 s2 = splserial(); 649 SSCOM_LOCK(sc); 650 651 /* Turn on interrupts. */ 652 sscom_enable_txrxint(sc); 653 654 /* Fetch the current modem control status, needed later. */ 655 sc->sc_msts = sc->read_modem_status(sc); 656 657 #if 0 658 /* Clear PPS capture state on first open. */ 659 sc->sc_ppsmask = 0; 660 sc->ppsparam.mode = 0; 661 #endif 662 663 SSCOM_UNLOCK(sc); 664 splx(s2); 665 666 /* 667 * Initialize the termios status to the defaults. Add in the 668 * sticky bits from TIOCSFLAGS. 669 */ 670 t.c_ispeed = 0; 671 if (ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 672 t.c_ospeed = sscomconsrate; 673 t.c_cflag = sscomconscflag; 674 } else { 675 t.c_ospeed = TTYDEF_SPEED; 676 t.c_cflag = TTYDEF_CFLAG; 677 } 678 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 679 SET(t.c_cflag, CLOCAL); 680 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 681 SET(t.c_cflag, CRTSCTS); 682 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 683 SET(t.c_cflag, MDMBUF); 684 /* Make sure sscomparam() will do something. */ 685 tp->t_ospeed = 0; 686 (void) sscomparam(tp, &t); 687 tp->t_iflag = TTYDEF_IFLAG; 688 tp->t_oflag = TTYDEF_OFLAG; 689 tp->t_lflag = TTYDEF_LFLAG; 690 ttychars(tp); 691 ttsetwater(tp); 692 693 s2 = splserial(); 694 SSCOM_LOCK(sc); 695 696 /* 697 * Turn on DTR. We must always do this, even if carrier is not 698 * present, because otherwise we'd have to use TIOCSDTR 699 * immediately after setting CLOCAL, which applications do not 700 * expect. We always assert DTR while the device is open 701 * unless explicitly requested to deassert it. 702 */ 703 sscom_modem(sc, 1); 704 705 /* Clear the input ring, and unblock. */ 706 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 707 sc->sc_rbavail = sscom_rbuf_size; 708 sscom_iflush(sc); 709 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 710 sscom_hwiflow(sc); 711 712 if (sscom_debug) 713 sscomstatus(sc, "sscomopen "); 714 715 SSCOM_UNLOCK(sc); 716 splx(s2); 717 } 718 719 splx(s); 720 721 error = ttyopen(tp, SSCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 722 if (error) 723 goto bad; 724 725 error = (*tp->t_linesw->l_open)(dev, tp); 726 if (error) 727 goto bad; 728 729 return 0; 730 731 bad: 732 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 733 /* 734 * We failed to open the device, and nobody else had it opened. 735 * Clean up the state as appropriate. 736 */ 737 sscom_shutdown(sc); 738 } 739 740 return error; 741 } 742 743 int 744 sscomclose(dev_t dev, int flag, int mode, struct lwp *l) 745 { 746 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 747 struct tty *tp = sc->sc_tty; 748 749 /* XXX This is for cons.c. */ 750 if (!ISSET(tp->t_state, TS_ISOPEN)) 751 return 0; 752 753 (*tp->t_linesw->l_close)(tp, flag); 754 ttyclose(tp); 755 756 if (SSCOM_ISALIVE(sc) == 0) 757 return 0; 758 759 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 760 /* 761 * Although we got a last close, the device may still be in 762 * use; e.g. if this was the dialout node, and there are still 763 * processes waiting for carrier on the non-dialout node. 764 */ 765 sscom_shutdown(sc); 766 } 767 768 return 0; 769 } 770 771 int 772 sscomread(dev_t dev, struct uio *uio, int flag) 773 { 774 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 775 struct tty *tp = sc->sc_tty; 776 777 if (SSCOM_ISALIVE(sc) == 0) 778 return EIO; 779 780 return (*tp->t_linesw->l_read)(tp, uio, flag); 781 } 782 783 int 784 sscomwrite(dev_t dev, struct uio *uio, int flag) 785 { 786 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 787 struct tty *tp = sc->sc_tty; 788 789 if (SSCOM_ISALIVE(sc) == 0) 790 return EIO; 791 792 return (*tp->t_linesw->l_write)(tp, uio, flag); 793 } 794 795 int 796 sscompoll(dev_t dev, int events, struct lwp *l) 797 { 798 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 799 struct tty *tp = sc->sc_tty; 800 801 if (SSCOM_ISALIVE(sc) == 0) 802 return EIO; 803 804 return (*tp->t_linesw->l_poll)(tp, events, l); 805 } 806 807 struct tty * 808 sscomtty(dev_t dev) 809 { 810 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 811 struct tty *tp = sc->sc_tty; 812 813 return tp; 814 } 815 816 int 817 sscomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 818 { 819 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(dev)); 820 struct tty *tp = sc->sc_tty; 821 int error; 822 int s; 823 824 if (SSCOM_ISALIVE(sc) == 0) 825 return EIO; 826 827 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 828 if (error != EPASSTHROUGH) 829 return error; 830 831 error = ttioctl(tp, cmd, data, flag, l); 832 if (error != EPASSTHROUGH) 833 return error; 834 835 error = 0; 836 837 s = splserial(); 838 SSCOM_LOCK(sc); 839 840 switch (cmd) { 841 case TIOCSBRK: 842 sscom_break(sc, 1); 843 break; 844 845 case TIOCCBRK: 846 sscom_break(sc, 0); 847 break; 848 849 case TIOCSDTR: 850 sscom_modem(sc, 1); 851 break; 852 853 case TIOCCDTR: 854 sscom_modem(sc, 0); 855 break; 856 857 case TIOCGFLAGS: 858 *(int *)data = sc->sc_swflags; 859 break; 860 861 case TIOCSFLAGS: 862 error = kauth_authorize_generic(l->l_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag); 863 if (error) 864 break; 865 sc->sc_swflags = *(int *)data; 866 break; 867 868 case TIOCMSET: 869 case TIOCMBIS: 870 case TIOCMBIC: 871 tiocm_to_sscom(sc, cmd, *(int *)data); 872 break; 873 874 case TIOCMGET: 875 *(int *)data = sscom_to_tiocm(sc); 876 break; 877 878 default: 879 error = EPASSTHROUGH; 880 break; 881 } 882 883 SSCOM_UNLOCK(sc); 884 splx(s); 885 886 if (sscom_debug) 887 sscomstatus(sc, "sscomioctl "); 888 889 return error; 890 } 891 892 integrate void 893 sscom_schedrx(struct sscom_softc *sc) 894 { 895 896 sc->sc_rx_ready = 1; 897 898 /* Wake up the poller. */ 899 softintr_schedule(sc->sc_si); 900 } 901 902 static void 903 sscom_break(struct sscom_softc *sc, int onoff) 904 { 905 906 if (onoff) 907 SET(sc->sc_ucon, UCON_SBREAK); 908 else 909 CLR(sc->sc_ucon, UCON_SBREAK); 910 911 if (!sc->sc_heldchange) { 912 if (sc->sc_tx_busy) { 913 sc->sc_heldtbc = sc->sc_tbc; 914 sc->sc_tbc = 0; 915 sc->sc_heldchange = 1; 916 } else 917 sscom_loadchannelregs(sc); 918 } 919 } 920 921 static void 922 sscom_modem(struct sscom_softc *sc, int onoff) 923 { 924 if (onoff) 925 SET(sc->sc_umcon, UMCON_DTR); 926 else 927 CLR(sc->sc_umcon, UMCON_DTR); 928 929 if (!sc->sc_heldchange) { 930 if (sc->sc_tx_busy) { 931 sc->sc_heldtbc = sc->sc_tbc; 932 sc->sc_tbc = 0; 933 sc->sc_heldchange = 1; 934 } else 935 sscom_loadchannelregs(sc); 936 } 937 } 938 939 static void 940 tiocm_to_sscom(struct sscom_softc *sc, u_long how, int ttybits) 941 { 942 u_char sscombits; 943 944 sscombits = 0; 945 if (ISSET(ttybits, TIOCM_DTR)) 946 sscombits = UMCON_DTR; 947 if (ISSET(ttybits, TIOCM_RTS)) 948 SET(sscombits, UMCON_RTS); 949 950 switch (how) { 951 case TIOCMBIC: 952 CLR(sc->sc_umcon, sscombits); 953 break; 954 955 case TIOCMBIS: 956 SET(sc->sc_umcon, sscombits); 957 break; 958 959 case TIOCMSET: 960 CLR(sc->sc_umcon, UMCON_DTR); 961 SET(sc->sc_umcon, sscombits); 962 break; 963 } 964 965 if (!sc->sc_heldchange) { 966 if (sc->sc_tx_busy) { 967 sc->sc_heldtbc = sc->sc_tbc; 968 sc->sc_tbc = 0; 969 sc->sc_heldchange = 1; 970 } else 971 sscom_loadchannelregs(sc); 972 } 973 } 974 975 static int 976 sscom_to_tiocm(struct sscom_softc *sc) 977 { 978 u_char sscombits; 979 int ttybits = 0; 980 981 sscombits = sc->sc_umcon; 982 #if 0 983 if (ISSET(sscombits, MCR_DTR)) 984 SET(ttybits, TIOCM_DTR); 985 #endif 986 if (ISSET(sscombits, UMCON_RTS)) 987 SET(ttybits, TIOCM_RTS); 988 989 sscombits = sc->sc_msts; 990 if (ISSET(sscombits, MSTS_DCD)) 991 SET(ttybits, TIOCM_CD); 992 if (ISSET(sscombits, MSTS_DSR)) 993 SET(ttybits, TIOCM_DSR); 994 if (ISSET(sscombits, MSTS_CTS)) 995 SET(ttybits, TIOCM_CTS); 996 997 if (sc->sc_ucon != 0) 998 SET(ttybits, TIOCM_LE); 999 1000 return ttybits; 1001 } 1002 1003 static int 1004 cflag2lcr(tcflag_t cflag) 1005 { 1006 u_char lcr = ULCON_PARITY_NONE; 1007 1008 switch (cflag & (PARENB|PARODD)) { 1009 case PARENB|PARODD: lcr = ULCON_PARITY_ODD; break; 1010 case PARENB: lcr = ULCON_PARITY_EVEN; 1011 } 1012 1013 switch (ISSET(cflag, CSIZE)) { 1014 case CS5: 1015 SET(lcr, ULCON_LENGTH_5); 1016 break; 1017 case CS6: 1018 SET(lcr, ULCON_LENGTH_6); 1019 break; 1020 case CS7: 1021 SET(lcr, ULCON_LENGTH_7); 1022 break; 1023 case CS8: 1024 SET(lcr, ULCON_LENGTH_8); 1025 break; 1026 } 1027 if (ISSET(cflag, CSTOPB)) 1028 SET(lcr, ULCON_STOP); 1029 1030 return lcr; 1031 } 1032 1033 int 1034 sscomparam(struct tty *tp, struct termios *t) 1035 { 1036 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1037 int ospeed; 1038 u_char lcr; 1039 int s; 1040 1041 if (SSCOM_ISALIVE(sc) == 0) 1042 return EIO; 1043 1044 ospeed = sscomspeed(t->c_ospeed, sc->sc_frequency); 1045 1046 /* Check requested parameters. */ 1047 if (ospeed < 0) 1048 return EINVAL; 1049 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1050 return EINVAL; 1051 1052 /* 1053 * For the console, always force CLOCAL and !HUPCL, so that the port 1054 * is always active. 1055 */ 1056 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 1057 ISSET(sc->sc_hwflags, SSCOM_HW_CONSOLE)) { 1058 SET(t->c_cflag, CLOCAL); 1059 CLR(t->c_cflag, HUPCL); 1060 } 1061 1062 /* 1063 * If there were no changes, don't do anything. This avoids dropping 1064 * input and improves performance when all we did was frob things like 1065 * VMIN and VTIME. 1066 */ 1067 if (tp->t_ospeed == t->c_ospeed && 1068 tp->t_cflag == t->c_cflag) 1069 return 0; 1070 1071 lcr = cflag2lcr(t->c_cflag); 1072 1073 s = splserial(); 1074 SSCOM_LOCK(sc); 1075 1076 sc->sc_ulcon = lcr; 1077 1078 /* 1079 * If we're not in a mode that assumes a connection is present, then 1080 * ignore carrier changes. 1081 */ 1082 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1083 sc->sc_msr_dcd = 0; 1084 else 1085 sc->sc_msr_dcd = MSTS_DCD; 1086 1087 /* 1088 * Set the flow control pins depending on the current flow control 1089 * mode. 1090 */ 1091 if (ISSET(t->c_cflag, CRTSCTS)) { 1092 sc->sc_mcr_dtr = UMCON_DTR; 1093 sc->sc_mcr_rts = UMCON_RTS; 1094 sc->sc_msr_cts = MSTS_CTS; 1095 } 1096 else if (ISSET(t->c_cflag, MDMBUF)) { 1097 /* 1098 * For DTR/DCD flow control, make sure we don't toggle DTR for 1099 * carrier detection. 1100 */ 1101 sc->sc_mcr_dtr = 0; 1102 sc->sc_mcr_rts = UMCON_DTR; 1103 sc->sc_msr_cts = MSTS_DCD; 1104 } 1105 else { 1106 /* 1107 * If no flow control, then always set RTS. This will make 1108 * the other side happy if it mistakenly thinks we're doing 1109 * RTS/CTS flow control. 1110 */ 1111 sc->sc_mcr_dtr = UMCON_DTR | UMCON_RTS; 1112 sc->sc_mcr_rts = 0; 1113 sc->sc_msr_cts = 0; 1114 if (ISSET(sc->sc_umcon, UMCON_DTR)) 1115 SET(sc->sc_umcon, UMCON_RTS); 1116 else 1117 CLR(sc->sc_umcon, UMCON_RTS); 1118 } 1119 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 1120 1121 if (ospeed == 0) 1122 CLR(sc->sc_umcon, sc->sc_mcr_dtr); 1123 else 1124 SET(sc->sc_umcon, sc->sc_mcr_dtr); 1125 1126 sc->sc_ubrdiv = ospeed; 1127 1128 /* And copy to tty. */ 1129 tp->t_ispeed = 0; 1130 tp->t_ospeed = t->c_ospeed; 1131 tp->t_cflag = t->c_cflag; 1132 1133 if (!sc->sc_heldchange) { 1134 if (sc->sc_tx_busy) { 1135 sc->sc_heldtbc = sc->sc_tbc; 1136 sc->sc_tbc = 0; 1137 sc->sc_heldchange = 1; 1138 } else 1139 sscom_loadchannelregs(sc); 1140 } 1141 1142 if (!ISSET(t->c_cflag, CHWFLOW)) { 1143 /* Disable the high water mark. */ 1144 sc->sc_r_hiwat = 0; 1145 sc->sc_r_lowat = 0; 1146 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1147 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1148 sscom_schedrx(sc); 1149 } 1150 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1151 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1152 sscom_hwiflow(sc); 1153 } 1154 } else { 1155 sc->sc_r_hiwat = sscom_rbuf_hiwat; 1156 sc->sc_r_lowat = sscom_rbuf_lowat; 1157 } 1158 1159 SSCOM_UNLOCK(sc); 1160 splx(s); 1161 1162 /* 1163 * Update the tty layer's idea of the carrier bit, in case we changed 1164 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1165 * explicit request. 1166 */ 1167 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msts, MSTS_DCD)); 1168 1169 if (sscom_debug) 1170 sscomstatus(sc, "sscomparam "); 1171 1172 if (!ISSET(t->c_cflag, CHWFLOW)) { 1173 if (sc->sc_tx_stopped) { 1174 sc->sc_tx_stopped = 0; 1175 sscomstart(tp); 1176 } 1177 } 1178 1179 return 0; 1180 } 1181 1182 static void 1183 sscom_iflush(struct sscom_softc *sc) 1184 { 1185 bus_space_tag_t iot = sc->sc_iot; 1186 bus_space_handle_t ioh = sc->sc_ioh; 1187 int timo; 1188 1189 1190 timo = 50000; 1191 /* flush any pending I/O */ 1192 while ( sscom_rxrdy(iot, ioh) && --timo) 1193 (void)sscom_getc(iot,ioh); 1194 #ifdef DIAGNOSTIC 1195 if (!timo) 1196 printf("%s: sscom_iflush timeout\n", sc->sc_dev.dv_xname); 1197 #endif 1198 } 1199 1200 static void 1201 sscom_loadchannelregs(struct sscom_softc *sc) 1202 { 1203 bus_space_tag_t iot = sc->sc_iot; 1204 bus_space_handle_t ioh = sc->sc_ioh; 1205 1206 /* XXXXX necessary? */ 1207 sscom_iflush(sc); 1208 1209 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1210 1211 #if 0 1212 if (ISSET(sc->sc_hwflags, COM_HW_FLOW)) { 1213 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1214 bus_space_write_1(iot, ioh, com_efr, sc->sc_efr); 1215 } 1216 #endif 1217 1218 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, sc->sc_ubrdiv); 1219 bus_space_write_1(iot, ioh, SSCOM_ULCON, sc->sc_ulcon); 1220 sc->set_modem_control(sc); 1221 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1222 } 1223 1224 static int 1225 sscomhwiflow(struct tty *tp, int block) 1226 { 1227 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1228 int s; 1229 1230 if (SSCOM_ISALIVE(sc) == 0) 1231 return 0; 1232 1233 if (sc->sc_mcr_rts == 0) 1234 return 0; 1235 1236 s = splserial(); 1237 SSCOM_LOCK(sc); 1238 1239 if (block) { 1240 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1241 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1242 sscom_hwiflow(sc); 1243 } 1244 } else { 1245 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1246 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1247 sscom_schedrx(sc); 1248 } 1249 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1250 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1251 sscom_hwiflow(sc); 1252 } 1253 } 1254 1255 SSCOM_UNLOCK(sc); 1256 splx(s); 1257 return 1; 1258 } 1259 1260 /* 1261 * (un)block input via hw flowcontrol 1262 */ 1263 static void 1264 sscom_hwiflow(struct sscom_softc *sc) 1265 { 1266 if (sc->sc_mcr_rts == 0) 1267 return; 1268 1269 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 1270 CLR(sc->sc_umcon, sc->sc_mcr_rts); 1271 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 1272 } else { 1273 SET(sc->sc_umcon, sc->sc_mcr_rts); 1274 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 1275 } 1276 sc->set_modem_control(sc); 1277 } 1278 1279 1280 void 1281 sscomstart(struct tty *tp) 1282 { 1283 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1284 int s; 1285 1286 if (SSCOM_ISALIVE(sc) == 0) 1287 return; 1288 1289 s = spltty(); 1290 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1291 goto out; 1292 if (sc->sc_tx_stopped) 1293 goto out; 1294 1295 if (tp->t_outq.c_cc <= tp->t_lowat) { 1296 if (ISSET(tp->t_state, TS_ASLEEP)) { 1297 CLR(tp->t_state, TS_ASLEEP); 1298 wakeup(&tp->t_outq); 1299 } 1300 selwakeup(&tp->t_wsel); 1301 if (tp->t_outq.c_cc == 0) 1302 goto out; 1303 } 1304 1305 /* Grab the first contiguous region of buffer space. */ 1306 { 1307 u_char *tba; 1308 int tbc; 1309 1310 tba = tp->t_outq.c_cf; 1311 tbc = ndqb(&tp->t_outq, 0); 1312 1313 (void)splserial(); 1314 SSCOM_LOCK(sc); 1315 1316 sc->sc_tba = tba; 1317 sc->sc_tbc = tbc; 1318 } 1319 1320 SET(tp->t_state, TS_BUSY); 1321 sc->sc_tx_busy = 1; 1322 1323 /* Output the first chunk of the contiguous buffer. */ 1324 sscom_output_chunk(sc); 1325 1326 /* Enable transmit completion interrupts if necessary. */ 1327 if ((sc->sc_hwflags & SSCOM_HW_TXINT) == 0) 1328 sscom_enable_txint(sc); 1329 1330 SSCOM_UNLOCK(sc); 1331 out: 1332 splx(s); 1333 return; 1334 } 1335 1336 /* 1337 * Stop output on a line. 1338 */ 1339 void 1340 sscomstop(struct tty *tp, int flag) 1341 { 1342 struct sscom_softc *sc = device_lookup(&sscom_cd, SSCOMUNIT(tp->t_dev)); 1343 int s; 1344 1345 s = splserial(); 1346 SSCOM_LOCK(sc); 1347 if (ISSET(tp->t_state, TS_BUSY)) { 1348 /* Stop transmitting at the next chunk. */ 1349 sc->sc_tbc = 0; 1350 sc->sc_heldtbc = 0; 1351 if (!ISSET(tp->t_state, TS_TTSTOP)) 1352 SET(tp->t_state, TS_FLUSH); 1353 } 1354 SSCOM_UNLOCK(sc); 1355 splx(s); 1356 } 1357 1358 void 1359 sscomdiag(void *arg) 1360 { 1361 struct sscom_softc *sc = arg; 1362 int overflows, floods; 1363 int s; 1364 1365 s = splserial(); 1366 SSCOM_LOCK(sc); 1367 overflows = sc->sc_overflows; 1368 sc->sc_overflows = 0; 1369 floods = sc->sc_floods; 1370 sc->sc_floods = 0; 1371 sc->sc_errors = 0; 1372 SSCOM_UNLOCK(sc); 1373 splx(s); 1374 1375 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1376 sc->sc_dev.dv_xname, 1377 overflows, overflows == 1 ? "" : "s", 1378 floods, floods == 1 ? "" : "s"); 1379 } 1380 1381 integrate void 1382 sscom_rxsoft(struct sscom_softc *sc, struct tty *tp) 1383 { 1384 int (*rint) (int, struct tty *) = tp->t_linesw->l_rint; 1385 u_char *get, *end; 1386 u_int cc, scc; 1387 u_char rsr; 1388 int code; 1389 int s; 1390 1391 end = sc->sc_ebuf; 1392 get = sc->sc_rbget; 1393 scc = cc = sscom_rbuf_size - sc->sc_rbavail; 1394 1395 if (cc == sscom_rbuf_size) { 1396 sc->sc_floods++; 1397 if (sc->sc_errors++ == 0) 1398 callout_reset(&sc->sc_diag_callout, 60 * hz, 1399 sscomdiag, sc); 1400 } 1401 1402 while (cc) { 1403 code = get[0]; 1404 rsr = get[1]; 1405 if (rsr) { 1406 if (ISSET(rsr, UERSTAT_OVERRUN)) { 1407 sc->sc_overflows++; 1408 if (sc->sc_errors++ == 0) 1409 callout_reset(&sc->sc_diag_callout, 1410 60 * hz, sscomdiag, sc); 1411 } 1412 if (ISSET(rsr, UERSTAT_BREAK | UERSTAT_FRAME)) 1413 SET(code, TTY_FE); 1414 if (ISSET(rsr, UERSTAT_PARITY)) 1415 SET(code, TTY_PE); 1416 } 1417 if ((*rint)(code, tp) == -1) { 1418 /* 1419 * The line discipline's buffer is out of space. 1420 */ 1421 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1422 /* 1423 * We're either not using flow control, or the 1424 * line discipline didn't tell us to block for 1425 * some reason. Either way, we have no way to 1426 * know when there's more space available, so 1427 * just drop the rest of the data. 1428 */ 1429 get += cc << 1; 1430 if (get >= end) 1431 get -= sscom_rbuf_size << 1; 1432 cc = 0; 1433 } else { 1434 /* 1435 * Don't schedule any more receive processing 1436 * until the line discipline tells us there's 1437 * space available (through sscomhwiflow()). 1438 * Leave the rest of the data in the input 1439 * buffer. 1440 */ 1441 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1442 } 1443 break; 1444 } 1445 get += 2; 1446 if (get >= end) 1447 get = sc->sc_rbuf; 1448 cc--; 1449 } 1450 1451 if (cc != scc) { 1452 sc->sc_rbget = get; 1453 s = splserial(); 1454 SSCOM_LOCK(sc); 1455 1456 cc = sc->sc_rbavail += scc - cc; 1457 /* Buffers should be ok again, release possible block. */ 1458 if (cc >= sc->sc_r_lowat) { 1459 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1460 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1461 sscom_enable_rxint(sc); 1462 sc->sc_ucon |= UCON_ERRINT; 1463 bus_space_write_2(sc->sc_iot, sc->sc_ioh, SSCOM_UCON, 1464 sc->sc_ucon); 1465 1466 } 1467 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1468 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1469 sscom_hwiflow(sc); 1470 } 1471 } 1472 SSCOM_UNLOCK(sc); 1473 splx(s); 1474 } 1475 } 1476 1477 integrate void 1478 sscom_txsoft(struct sscom_softc *sc, struct tty *tp) 1479 { 1480 1481 CLR(tp->t_state, TS_BUSY); 1482 if (ISSET(tp->t_state, TS_FLUSH)) 1483 CLR(tp->t_state, TS_FLUSH); 1484 else 1485 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1486 (*tp->t_linesw->l_start)(tp); 1487 } 1488 1489 integrate void 1490 sscom_stsoft(struct sscom_softc *sc, struct tty *tp) 1491 { 1492 u_char msr, delta; 1493 int s; 1494 1495 s = splserial(); 1496 SSCOM_LOCK(sc); 1497 msr = sc->sc_msts; 1498 delta = sc->sc_msr_delta; 1499 sc->sc_msr_delta = 0; 1500 SSCOM_UNLOCK(sc); 1501 splx(s); 1502 1503 if (ISSET(delta, sc->sc_msr_dcd)) { 1504 /* 1505 * Inform the tty layer that carrier detect changed. 1506 */ 1507 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MSTS_DCD)); 1508 } 1509 1510 if (ISSET(delta, sc->sc_msr_cts)) { 1511 /* Block or unblock output according to flow control. */ 1512 if (ISSET(msr, sc->sc_msr_cts)) { 1513 sc->sc_tx_stopped = 0; 1514 (*tp->t_linesw->l_start)(tp); 1515 } else { 1516 sc->sc_tx_stopped = 1; 1517 } 1518 } 1519 1520 if (sscom_debug) 1521 sscomstatus(sc, "sscom_stsoft"); 1522 } 1523 1524 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1525 void 1526 sscomsoft(void *arg) 1527 { 1528 struct sscom_softc *sc = arg; 1529 struct tty *tp; 1530 1531 if (SSCOM_ISALIVE(sc) == 0) 1532 return; 1533 1534 { 1535 tp = sc->sc_tty; 1536 1537 if (sc->sc_rx_ready) { 1538 sc->sc_rx_ready = 0; 1539 sscom_rxsoft(sc, tp); 1540 } 1541 1542 if (sc->sc_st_check) { 1543 sc->sc_st_check = 0; 1544 sscom_stsoft(sc, tp); 1545 } 1546 1547 if (sc->sc_tx_done) { 1548 sc->sc_tx_done = 0; 1549 sscom_txsoft(sc, tp); 1550 } 1551 } 1552 } 1553 #else 1554 #error sscom needs GENERIC_SOFT_INERRUPTS 1555 #endif 1556 1557 1558 int 1559 sscomrxintr(void *arg) 1560 { 1561 struct sscom_softc *sc = arg; 1562 bus_space_tag_t iot = sc->sc_iot; 1563 bus_space_handle_t ioh = sc->sc_ioh; 1564 u_char *put, *end; 1565 u_int cc; 1566 1567 if (SSCOM_ISALIVE(sc) == 0) 1568 return 0; 1569 1570 SSCOM_LOCK(sc); 1571 1572 end = sc->sc_ebuf; 1573 put = sc->sc_rbput; 1574 cc = sc->sc_rbavail; 1575 1576 do { 1577 u_char msts, delta; 1578 u_char uerstat; 1579 uint16_t ufstat; 1580 1581 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1582 1583 /* XXX: break interrupt with no character? */ 1584 1585 if ( (ufstat & (UFSTAT_RXCOUNT|UFSTAT_RXFULL)) && 1586 !ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1587 1588 while (cc > 0) { 1589 int cn_trapped = 0; 1590 1591 /* get status and received character. 1592 read status register first */ 1593 uerstat = sscom_geterr(iot, ioh); 1594 put[0] = sscom_getc(iot, ioh); 1595 1596 if (ISSET(uerstat, UERSTAT_BREAK)) { 1597 int con_trapped = 0; 1598 cn_check_magic(sc->sc_tty->t_dev, 1599 CNC_BREAK, sscom_cnm_state); 1600 if (con_trapped) 1601 continue; 1602 #if defined(KGDB) 1603 if (ISSET(sc->sc_hwflags, 1604 SSCOM_HW_KGDB)) { 1605 kgdb_connect(1); 1606 continue; 1607 } 1608 #endif 1609 } 1610 1611 put[1] = uerstat; 1612 cn_check_magic(sc->sc_tty->t_dev, 1613 put[0], sscom_cnm_state); 1614 if (!cn_trapped) { 1615 put += 2; 1616 if (put >= end) 1617 put = sc->sc_rbuf; 1618 cc--; 1619 } 1620 1621 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1622 if ( (ufstat & (UFSTAT_RXFULL|UFSTAT_RXCOUNT)) == 0 ) 1623 break; 1624 } 1625 1626 /* 1627 * Current string of incoming characters ended because 1628 * no more data was available or we ran out of space. 1629 * Schedule a receive event if any data was received. 1630 * If we're out of space, turn off receive interrupts. 1631 */ 1632 sc->sc_rbput = put; 1633 sc->sc_rbavail = cc; 1634 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1635 sc->sc_rx_ready = 1; 1636 1637 /* 1638 * See if we are in danger of overflowing a buffer. If 1639 * so, use hardware flow control to ease the pressure. 1640 */ 1641 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1642 cc < sc->sc_r_hiwat) { 1643 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1644 sscom_hwiflow(sc); 1645 } 1646 1647 /* 1648 * If we're out of space, disable receive interrupts 1649 * until the queue has drained a bit. 1650 */ 1651 if (!cc) { 1652 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1653 sscom_disable_rxint(sc); 1654 sc->sc_ucon &= ~UCON_ERRINT; 1655 bus_space_write_2(iot, ioh, SSCOM_UCON, sc->sc_ucon); 1656 } 1657 } 1658 1659 1660 msts = sc->read_modem_status(sc); 1661 delta = msts ^ sc->sc_msts; 1662 sc->sc_msts = msts; 1663 1664 #ifdef notyet 1665 /* 1666 * Pulse-per-second (PSS) signals on edge of DCD? 1667 * Process these even if line discipline is ignoring DCD. 1668 */ 1669 if (delta & sc->sc_ppsmask) { 1670 struct timeval tv; 1671 if ((msr & sc->sc_ppsmask) == sc->sc_ppsassert) { 1672 /* XXX nanotime() */ 1673 microtime(&tv); 1674 TIMEVAL_TO_TIMESPEC(&tv, 1675 &sc->ppsinfo.assert_timestamp); 1676 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 1677 timespecadd(&sc->ppsinfo.assert_timestamp, 1678 &sc->ppsparam.assert_offset, 1679 &sc->ppsinfo.assert_timestamp); 1680 } 1681 1682 #ifdef PPS_SYNC 1683 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 1684 hardpps(&tv, tv.tv_usec); 1685 #endif 1686 sc->ppsinfo.assert_sequence++; 1687 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1688 1689 } else if ((msr & sc->sc_ppsmask) == sc->sc_ppsclear) { 1690 /* XXX nanotime() */ 1691 microtime(&tv); 1692 TIMEVAL_TO_TIMESPEC(&tv, 1693 &sc->ppsinfo.clear_timestamp); 1694 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 1695 timespecadd(&sc->ppsinfo.clear_timestamp, 1696 &sc->ppsparam.clear_offset, 1697 &sc->ppsinfo.clear_timestamp); 1698 } 1699 1700 #ifdef PPS_SYNC 1701 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 1702 hardpps(&tv, tv.tv_usec); 1703 #endif 1704 sc->ppsinfo.clear_sequence++; 1705 sc->ppsinfo.current_mode = sc->ppsparam.mode; 1706 } 1707 } 1708 #endif 1709 1710 /* 1711 * Process normal status changes 1712 */ 1713 if (ISSET(delta, sc->sc_msr_mask)) { 1714 SET(sc->sc_msr_delta, delta); 1715 1716 /* 1717 * Stop output immediately if we lose the output 1718 * flow control signal or carrier detect. 1719 */ 1720 if (ISSET(~msts, sc->sc_msr_mask)) { 1721 sc->sc_tbc = 0; 1722 sc->sc_heldtbc = 0; 1723 #ifdef SSCOM_DEBUG 1724 if (sscom_debug) 1725 sscomstatus(sc, "sscomintr "); 1726 #endif 1727 } 1728 1729 sc->sc_st_check = 1; 1730 } 1731 1732 /* 1733 * Done handling any receive interrupts. 1734 */ 1735 1736 /* 1737 * If we've delayed a parameter change, do it 1738 * now, and restart * output. 1739 */ 1740 if ((ufstat & UFSTAT_TXCOUNT) == 0) { 1741 /* XXX: we should check transmitter empty also */ 1742 1743 if (sc->sc_heldchange) { 1744 sscom_loadchannelregs(sc); 1745 sc->sc_heldchange = 0; 1746 sc->sc_tbc = sc->sc_heldtbc; 1747 sc->sc_heldtbc = 0; 1748 } 1749 } 1750 1751 1752 } while (0); 1753 1754 SSCOM_UNLOCK(sc); 1755 1756 /* Wake up the poller. */ 1757 softintr_schedule(sc->sc_si); 1758 1759 #if NRND > 0 && defined(RND_COM) 1760 rnd_add_uint32(&sc->rnd_source, iir | rsr); 1761 #endif 1762 1763 return 1; 1764 } 1765 1766 int 1767 sscomtxintr(void *arg) 1768 { 1769 struct sscom_softc *sc = arg; 1770 bus_space_tag_t iot = sc->sc_iot; 1771 bus_space_handle_t ioh = sc->sc_ioh; 1772 uint16_t ufstat; 1773 1774 if (SSCOM_ISALIVE(sc) == 0) 1775 return 0; 1776 1777 SSCOM_LOCK(sc); 1778 1779 ufstat = bus_space_read_2(iot, ioh, SSCOM_UFSTAT); 1780 1781 /* 1782 * If we've delayed a parameter change, do it 1783 * now, and restart * output. 1784 */ 1785 if (sc->sc_heldchange && (ufstat & UFSTAT_TXCOUNT) == 0) { 1786 /* XXX: we should check transmitter empty also */ 1787 sscom_loadchannelregs(sc); 1788 sc->sc_heldchange = 0; 1789 sc->sc_tbc = sc->sc_heldtbc; 1790 sc->sc_heldtbc = 0; 1791 } 1792 1793 /* 1794 * See if data can be transmitted as well. Schedule tx 1795 * done event if no data left and tty was marked busy. 1796 */ 1797 if (!ISSET(ufstat,UFSTAT_TXFULL)) { 1798 /* 1799 * Output the next chunk of the contiguous 1800 * buffer, if any. 1801 */ 1802 if (sc->sc_tbc > 0) { 1803 __sscom_output_chunk(sc, ufstat); 1804 } 1805 else { 1806 /* 1807 * Disable transmit sscompletion 1808 * interrupts if necessary. 1809 */ 1810 if (sc->sc_hwflags & SSCOM_HW_TXINT) 1811 sscom_disable_txint(sc); 1812 if (sc->sc_tx_busy) { 1813 sc->sc_tx_busy = 0; 1814 sc->sc_tx_done = 1; 1815 } 1816 } 1817 } 1818 1819 SSCOM_UNLOCK(sc); 1820 1821 /* Wake up the poller. */ 1822 softintr_schedule(sc->sc_si); 1823 1824 #if NRND > 0 && defined(RND_COM) 1825 rnd_add_uint32(&sc->rnd_source, iir | rsr); 1826 #endif 1827 1828 return 1; 1829 } 1830 1831 1832 #if defined(KGDB) || defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1833 /* 1834 * Initialize UART for use as console or KGDB line. 1835 */ 1836 static int 1837 sscom_init(bus_space_tag_t iot, const struct sscom_uart_info *config, 1838 int rate, int frequency, tcflag_t cflag, bus_space_handle_t *iohp) 1839 { 1840 bus_space_handle_t ioh; 1841 bus_addr_t iobase = config->iobase; 1842 1843 if (bus_space_map(iot, iobase, SSCOM_SIZE, 0, &ioh)) 1844 return ENOMEM; /* ??? */ 1845 1846 bus_space_write_2(iot, ioh, SSCOM_UCON, 0); 1847 bus_space_write_1(iot, ioh, SSCOM_UFCON, 1848 UFCON_TXTRIGGER_8 | UFCON_RXTRIGGER_8 | 1849 UFCON_TXFIFO_RESET | UFCON_RXFIFO_RESET | 1850 UFCON_FIFO_ENABLE ); 1851 /* tx/rx fifo reset are auto-cleared */ 1852 1853 rate = sscomspeed(rate, frequency); 1854 bus_space_write_2(iot, ioh, SSCOM_UBRDIV, rate); 1855 bus_space_write_2(iot, ioh, SSCOM_ULCON, cflag2lcr(cflag)); 1856 1857 /* enable UART */ 1858 bus_space_write_2(iot, ioh, SSCOM_UCON, 1859 UCON_TXMODE_INT|UCON_RXMODE_INT); 1860 bus_space_write_2(iot, ioh, SSCOM_UMCON, UMCON_RTS); 1861 1862 *iohp = ioh; 1863 return 0; 1864 } 1865 1866 #endif 1867 1868 #if defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE) 1869 /* 1870 * Following are all routines needed for SSCOM to act as console 1871 */ 1872 struct consdev sscomcons = { 1873 NULL, NULL, sscomcngetc, sscomcnputc, sscomcnpollc, NULL, 1874 NULL, NULL, NODEV, CN_NORMAL 1875 }; 1876 1877 1878 int 1879 sscom_cnattach(bus_space_tag_t iot, const struct sscom_uart_info *config, 1880 int rate, int frequency, tcflag_t cflag) 1881 { 1882 int res; 1883 1884 res = sscom_init(iot, config, rate, frequency, cflag, &sscomconsioh); 1885 if (res) 1886 return res; 1887 1888 cn_tab = &sscomcons; 1889 cn_init_magic(&sscom_cnm_state); 1890 cn_set_magic("\047\001"); /* default magic is BREAK */ 1891 1892 sscomconstag = iot; 1893 sscomconsunit = config->unit; 1894 sscomconsrate = rate; 1895 sscomconscflag = cflag; 1896 1897 return 0; 1898 } 1899 1900 void 1901 sscom_cndetach(void) 1902 { 1903 bus_space_unmap(sscomconstag, sscomconsioh, SSCOM_SIZE); 1904 sscomconstag = NULL; 1905 1906 cn_tab = NULL; 1907 } 1908 1909 /* 1910 * The read-ahead code is so that you can detect pending in-band 1911 * cn_magic in polled mode while doing output rather than having to 1912 * wait until the kernel decides it needs input. 1913 */ 1914 1915 #define MAX_READAHEAD 20 1916 static int sscom_readahead[MAX_READAHEAD]; 1917 static int sscom_readaheadcount = 0; 1918 1919 int 1920 sscomcngetc(dev_t dev) 1921 { 1922 int s = splserial(); 1923 u_char stat, c; 1924 1925 /* got a character from reading things earlier */ 1926 if (sscom_readaheadcount > 0) { 1927 int i; 1928 1929 c = sscom_readahead[0]; 1930 for (i = 1; i < sscom_readaheadcount; i++) { 1931 sscom_readahead[i-1] = sscom_readahead[i]; 1932 } 1933 sscom_readaheadcount--; 1934 splx(s); 1935 return c; 1936 } 1937 1938 /* block until a character becomes available */ 1939 while (!sscom_rxrdy(sscomconstag, sscomconsioh)) 1940 ; 1941 1942 c = sscom_getc(sscomconstag, sscomconsioh); 1943 stat = sscom_geterr(sscomconstag, sscomconsioh); 1944 { 1945 int cn_trapped = 0; /* unused */ 1946 #ifdef DDB 1947 extern int db_active; 1948 if (!db_active) 1949 #endif 1950 cn_check_magic(dev, c, sscom_cnm_state); 1951 } 1952 splx(s); 1953 return c; 1954 } 1955 1956 /* 1957 * Console kernel output character routine. 1958 */ 1959 void 1960 sscomcnputc(dev_t dev, int c) 1961 { 1962 int s = splserial(); 1963 int timo; 1964 1965 int cin, stat; 1966 if (sscom_readaheadcount < MAX_READAHEAD && 1967 sscom_rxrdy(sscomconstag, sscomconsioh)) { 1968 1969 int cn_trapped = 0; 1970 cin = sscom_getc(sscomconstag, sscomconsioh); 1971 stat = sscom_geterr(sscomconstag, sscomconsioh); 1972 cn_check_magic(dev, cin, sscom_cnm_state); 1973 sscom_readahead[sscom_readaheadcount++] = cin; 1974 } 1975 1976 /* wait for any pending transmission to finish */ 1977 timo = 150000; 1978 while (ISSET(bus_space_read_2(sscomconstag, sscomconsioh, SSCOM_UFSTAT), 1979 UFSTAT_TXFULL) && --timo) 1980 continue; 1981 1982 bus_space_write_1(sscomconstag, sscomconsioh, SSCOM_UTXH, c); 1983 SSCOM_BARRIER(sscomconstag, sscomconsioh, BR | BW); 1984 1985 #if 0 1986 /* wait for this transmission to complete */ 1987 timo = 1500000; 1988 while (!ISSET(bus_space_read_1(sscomconstag, sscomconsioh, SSCOM_UTRSTAT), 1989 UTRSTAT_TXEMPTY) && --timo) 1990 continue; 1991 #endif 1992 splx(s); 1993 } 1994 1995 void 1996 sscomcnpollc(dev_t dev, int on) 1997 { 1998 1999 } 2000 2001 #endif /* SSCOM0CONSOLE||SSCOM1CONSOLE */ 2002 2003 #ifdef KGDB 2004 int 2005 sscom_kgdb_attach(bus_space_tag_t iot, const struct sscom_uart_info *config, 2006 int rate, int frequency, tcflag_t cflag) 2007 { 2008 int res; 2009 2010 if (iot == sscomconstag && config->unit == sscomconsunit) { 2011 printf( "console==kgdb_port (%d): kgdb disabled\n", sscomconsunit); 2012 return EBUSY; /* cannot share with console */ 2013 } 2014 2015 res = sscom_init(iot, config, rate, frequency, cflag, &sscom_kgdb_ioh); 2016 if (res) 2017 return res; 2018 2019 kgdb_attach(sscom_kgdb_getc, sscom_kgdb_putc, NULL); 2020 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 2021 2022 sscom_kgdb_iot = iot; 2023 sscom_kgdb_unit = config->unit; 2024 2025 return 0; 2026 } 2027 2028 /* ARGSUSED */ 2029 int 2030 sscom_kgdb_getc(void *arg) 2031 { 2032 int c, stat; 2033 2034 /* block until a character becomes available */ 2035 while (!sscom_rxrdy(sscom_kgdb_iot, sscom_kgdb_ioh)) 2036 ; 2037 2038 c = sscom_getc(sscom_kgdb_iot, sscom_kgdb_ioh); 2039 stat = sscom_geterr(sscom_kgdb_iot, sscom_kgdb_ioh); 2040 2041 return c; 2042 } 2043 2044 /* ARGSUSED */ 2045 void 2046 sscom_kgdb_putc(void *arg, int c) 2047 { 2048 int timo; 2049 2050 /* wait for any pending transmission to finish */ 2051 timo = 150000; 2052 while (ISSET(bus_space_read_2(sscom_kgdb_iot, sscom_kgdb_ioh, 2053 SSCOM_UFSTAT), UFSTAT_TXFULL) && --timo) 2054 continue; 2055 2056 bus_space_write_1(sscom_kgdb_iot, sscom_kgdb_ioh, SSCOM_UTXH, c); 2057 SSCOM_BARRIER(sscom_kgdb_iot, sscom_kgdb_ioh, BR | BW); 2058 2059 #if 0 2060 /* wait for this transmission to complete */ 2061 timo = 1500000; 2062 while (!ISSET(bus_space_read_1(sscom_kgdb_iot, sscom_kgdb_ioh, 2063 SSCOM_UTRSTAT), UTRSTAT_TXEMPTY) && --timo) 2064 continue; 2065 #endif 2066 } 2067 #endif /* KGDB */ 2068 2069 /* helper function to identify the sscom ports used by 2070 console or KGDB (and not yet autoconf attached) */ 2071 int 2072 sscom_is_console(bus_space_tag_t iot, int unit, 2073 bus_space_handle_t *ioh) 2074 { 2075 bus_space_handle_t help; 2076 2077 if (!sscomconsattached && 2078 iot == sscomconstag && unit == sscomconsunit) 2079 help = sscomconsioh; 2080 #ifdef KGDB 2081 else if (!sscom_kgdb_attached && 2082 iot == sscom_kgdb_iot && unit == sscom_kgdb_unit) 2083 help = sscom_kgdb_ioh; 2084 #endif 2085 else 2086 return 0; 2087 2088 if (ioh) 2089 *ioh = help; 2090 return 1; 2091 } 2092
Indexes created Mon Sep 29 21:09:56 GMT 2025