sa11x0_com.c revision 1.3
1 /* $NetBSD: sa11x0_com.c,v 1.3 2002/03/17 19:40:34 atatat Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Charles M. Hannum. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * @(#)com.c 7.5 (Berkeley) 5/16/91 75 */ 76 77 #include "opt_com.h" 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 81 #include "rnd.h" 82 #if NRND > 0 && defined(RND_COM) 83 #include <sys/rnd.h> 84 #endif 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/types.h> 89 #include <sys/conf.h> 90 #include <sys/file.h> 91 #include <sys/device.h> 92 #include <sys/kernel.h> 93 #include <sys/malloc.h> 94 #include <sys/tty.h> 95 #include <sys/uio.h> 96 #include <sys/vnode.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/bus.h> 101 #include <arm/sa11x0/sa11x0_reg.h> 102 #include <arm/sa11x0/sa11x0_var.h> 103 #include <arm/sa11x0/sa11x0_comreg.h> 104 #include <arm/sa11x0/sa11x0_comvar.h> 105 106 #include "sacom.h" 107 108 cdev_decl(sacom); 109 110 static int sacom_match(struct device *, struct cfdata *, void *); 111 static void sacom_attach(struct device *, struct device *, void *); 112 static void sacom_filltx(struct sacom_softc *); 113 static void sacom_attach_subr(struct sacom_softc *); 114 #if defined(DDB) || defined(KGDB) 115 static void sacom_enable_debugport(struct sacom_softc *); 116 #endif 117 void sacom_config(struct sacom_softc *); 118 void sacom_shutdown(struct sacom_softc *); 119 static u_int cflag2cr0(tcflag_t); 120 int sacomparam(struct tty *, struct termios *); 121 void sacomstart(struct tty *); 122 void sacomstop(struct tty *, int); 123 int sacomhwiflow(struct tty *, int); 124 125 void sacom_loadchannelregs(struct sacom_softc *); 126 void sacom_hwiflow(struct sacom_softc *); 127 void sacom_break(struct sacom_softc *, int); 128 void sacom_modem(struct sacom_softc *, int); 129 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 130 int sacom_to_tiocm(struct sacom_softc *); 131 void sacom_iflush(struct sacom_softc *); 132 133 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 134 void sacomsoft(void *); 135 #else 136 void sacomsoft(void); 137 #endif 138 139 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 140 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 141 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 142 static inline void sacom_schedrx(struct sacom_softc *); 143 144 145 #define COMUNIT_MASK 0x7ffff 146 #define COMDIALOUT_MASK 0x80000 147 148 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 149 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 150 151 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 152 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 153 154 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 155 #define COM_LOCK(sc) 156 #define COM_UNLOCK(sc) 157 158 #define SET(t, f) (t) |= (f) 159 #define CLR(t, f) (t) &= ~(f) 160 #define ISSET(t, f) ((t) & (f)) 161 162 int sacomintr(void *); 163 int sacomcngetc(dev_t); 164 void sacomcnputc(dev_t, int); 165 void sacomcnpollc(dev_t, int); 166 167 void sacomcnprobe(struct consdev *); 168 void sacomcninit(struct consdev *); 169 170 extern struct bus_space sa11x0_bs_tag; 171 172 static bus_space_tag_t sacomconstag; 173 static bus_space_handle_t sacomconsioh; 174 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 175 176 static int sacomconsattached; 177 static int sacomconsrate; 178 static tcflag_t sacomconscflag; 179 180 struct cfattach sacom_ca = { 181 sizeof(struct sacom_softc), sacom_match, sacom_attach 182 }; 183 extern struct cfdriver sacom_cd; 184 185 struct consdev sacomcons = { 186 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 187 NODEV, CN_NORMAL 188 }; 189 190 #ifndef CONMODE 191 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 192 #endif 193 #ifndef CONSPEED 194 #define CONSPEED 9600 195 #endif 196 #ifndef CONADDR 197 #define CONADDR SACOM3_BASE 198 #endif 199 200 static int 201 sacom_match(parent, match, aux) 202 struct device *parent; 203 struct cfdata *match; 204 void *aux; 205 { 206 return (1); 207 } 208 209 void 210 sacom_attach(parent, self, aux) 211 struct device *parent; 212 struct device *self; 213 void *aux; 214 { 215 struct sacom_softc *sc = (struct sacom_softc*)self; 216 struct sa11x0_attach_args *sa = aux; 217 218 printf("\n"); 219 220 sc->sc_iot = sa->sa_iot; 221 sc->sc_baseaddr = sa->sa_addr; 222 223 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 224 &sc->sc_ioh)) { 225 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 226 return; 227 } 228 229 printf("%s: ", sc->sc_dev.dv_xname); 230 switch(sc->sc_baseaddr) { 231 case 0x80050000: 232 printf("SA11x0 UART3\n"); 233 break; 234 case 0x80010000: 235 printf("SA11x0 UART1\n"); 236 break; 237 case 0x80030000: 238 printf("SA11x0 UART2 (IRDA)\n"); 239 break; 240 default: 241 printf("unknown SA11x0 UART\n"); 242 break; 243 } 244 245 sacom_attach_subr(sc); 246 247 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 248 } 249 250 void 251 sacom_attach_subr(sc) 252 struct sacom_softc *sc; 253 { 254 bus_addr_t iobase = sc->sc_baseaddr; 255 bus_space_tag_t iot = sc->sc_iot; 256 struct tty *tp; 257 258 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 259 simple_lock_init(&sc->sc_lock); 260 #endif 261 262 /* XXX Do we need to disable interrupts here? */ 263 264 if (iot == sacomconstag && iobase == sacomconsaddr) { 265 sacomconsattached = 1; 266 sc->sc_speed = SACOMSPEED(sacomconsrate); 267 268 /* Make sure the console is always "hardwired". */ 269 delay(10000); /* wait for output to finish */ 270 SET(sc->sc_hwflags, COM_HW_CONSOLE); 271 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 272 } 273 274 tp = ttymalloc(); 275 tp->t_oproc = sacomstart; 276 tp->t_param = sacomparam; 277 tp->t_hwiflow = sacomhwiflow; 278 279 sc->sc_tty = tp; 280 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 281 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 282 sc->sc_rbavail = SACOM_RING_SIZE; 283 if (sc->sc_rbuf == NULL) { 284 printf("%s: unable to allocate ring buffer\n", 285 sc->sc_dev.dv_xname); 286 return; 287 } 288 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 289 sc->sc_tbc = 0; 290 291 tty_attach(tp); 292 293 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 294 int maj; 295 296 /* locate the major number */ 297 for (maj = 0; maj < nchrdev; maj++) 298 if (cdevsw[maj].d_open == sacomopen) 299 break; 300 301 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 302 303 delay(10000); /* XXX */ 304 printf("%s: console\n", sc->sc_dev.dv_xname); 305 delay(10000); /* XXX */ 306 } 307 308 309 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 310 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 311 #endif 312 313 #if NRND > 0 && defined(RND_COM) 314 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 315 RND_TYPE_TTY, 0); 316 #endif 317 318 /* if there are no enable/disable functions, assume the device 319 is always enabled */ 320 if (!sc->enable) 321 sc->enabled = 1; 322 323 sacom_config(sc); 324 325 SET(sc->sc_hwflags, COM_HW_DEV_OK); 326 } 327 328 /* This is necessary when dynamically changing SAIP configuration. */ 329 int 330 sacom_detach(self, flags) 331 struct device *self; 332 int flags; 333 { 334 struct sacom_softc *sc = (struct sacom_softc *)self; 335 int maj, mn; 336 337 /* locate the major number */ 338 for (maj = 0; maj < nchrdev; maj++) 339 if (cdevsw[maj].d_open == sacomopen) 340 break; 341 342 /* Nuke the vnodes for any open instances. */ 343 mn = self->dv_unit; 344 vdevgone(maj, mn, mn, VCHR); 345 346 mn |= COMDIALOUT_MASK; 347 vdevgone(maj, mn, mn, VCHR); 348 349 /* Free the receive buffer. */ 350 free(sc->sc_rbuf, M_DEVBUF); 351 352 /* Detach and free the tty. */ 353 tty_detach(sc->sc_tty); 354 ttyfree(sc->sc_tty); 355 356 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 357 /* Unhook the soft interrupt handler. */ 358 softintr_disestablish(sc->sc_si); 359 #endif 360 361 #if NRND > 0 && defined(RND_COM) 362 /* Unhook the entropy source. */ 363 rnd_detach_source(&sc->rnd_source); 364 #endif 365 366 return (0); 367 } 368 369 void 370 sacom_config(sc) 371 struct sacom_softc *sc; 372 { 373 bus_space_tag_t iot = sc->sc_iot; 374 bus_space_handle_t ioh = sc->sc_ioh; 375 376 /* Disable engine before configuring the device. */ 377 sc->sc_cr3 = 0; 378 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 379 380 #ifdef DDB 381 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 382 sacom_enable_debugport(sc); 383 #endif 384 } 385 386 #ifdef DDB 387 static void 388 sacom_enable_debugport(sc) 389 struct sacom_softc *sc; 390 { 391 bus_space_tag_t iot = sc->sc_iot; 392 bus_space_handle_t ioh = sc->sc_ioh; 393 int s; 394 395 s = splserial(); 396 COM_LOCK(sc); 397 sc->sc_cr3 = CR3_RXE | CR3_TXE; 398 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 399 COM_UNLOCK(sc); 400 splx(s); 401 } 402 #endif 403 404 int 405 sacom_activate(self, act) 406 struct device *self; 407 enum devact act; 408 { 409 struct sacom_softc *sc = (struct sacom_softc *)self; 410 int s, rv = 0; 411 412 s = splserial(); 413 COM_LOCK(sc); 414 switch (act) { 415 case DVACT_ACTIVATE: 416 rv = EOPNOTSUPP; 417 break; 418 419 case DVACT_DEACTIVATE: 420 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 421 rv = EBUSY; 422 break; 423 } 424 425 if (sc->disable != NULL && sc->enabled != 0) { 426 (*sc->disable)(sc); 427 sc->enabled = 0; 428 } 429 break; 430 } 431 432 COM_UNLOCK(sc); 433 splx(s); 434 return (rv); 435 } 436 437 void 438 sacom_shutdown(sc) 439 struct sacom_softc *sc; 440 { 441 struct tty *tp = sc->sc_tty; 442 int s; 443 444 s = splserial(); 445 COM_LOCK(sc); 446 447 /* Clear any break condition set with TIOCSBRK. */ 448 sacom_break(sc, 0); 449 450 /* 451 * Hang up if necessary. Wait a bit, so the other side has time to 452 * notice even if we immediately open the port again. 453 * Avoid tsleeping above splhigh(). 454 */ 455 if (ISSET(tp->t_cflag, HUPCL)) { 456 sacom_modem(sc, 0); 457 COM_UNLOCK(sc); 458 splx(s); 459 /* XXX tsleep will only timeout */ 460 (void) tsleep(sc, TTIPRI, ttclos, hz); 461 s = splserial(); 462 COM_LOCK(sc); 463 } 464 465 /* Turn off interrupts. */ 466 sc->sc_cr3 = 0; 467 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 468 469 if (sc->disable) { 470 #ifdef DIAGNOSTIC 471 if (!sc->enabled) 472 panic("sacom_shutdown: not enabled?"); 473 #endif 474 (*sc->disable)(sc); 475 sc->enabled = 0; 476 } 477 COM_UNLOCK(sc); 478 splx(s); 479 } 480 481 int 482 sacomopen(dev, flag, mode, p) 483 dev_t dev; 484 int flag, mode; 485 struct proc *p; 486 { 487 struct sacom_softc *sc; 488 struct tty *tp; 489 int s, s2; 490 int error; 491 492 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 493 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 494 sc->sc_rbuf == NULL) 495 return (ENXIO); 496 497 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 498 return (ENXIO); 499 500 tp = sc->sc_tty; 501 502 if (ISSET(tp->t_state, TS_ISOPEN) && 503 ISSET(tp->t_state, TS_XCLUDE) && 504 p->p_ucred->cr_uid != 0) 505 return (EBUSY); 506 507 s = spltty(); 508 509 /* 510 * Do the following iff this is a first open. 511 */ 512 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 513 struct termios t; 514 515 tp->t_dev = dev; 516 517 s2 = splserial(); 518 COM_LOCK(sc); 519 520 if (sc->enable) { 521 if ((*sc->enable)(sc)) { 522 COM_UNLOCK(sc); 523 splx(s2); 524 splx(s); 525 printf("%s: device enable failed\n", 526 sc->sc_dev.dv_xname); 527 return (EIO); 528 } 529 sc->enabled = 1; 530 sacom_config(sc); 531 } 532 533 /* Turn on interrupts. */ 534 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 535 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 536 sc->sc_cr3); 537 538 539 COM_UNLOCK(sc); 540 splx(s2); 541 542 /* 543 * Initialize the termios status to the defaults. Add in the 544 * sticky bits from TIOCSFLAGS. 545 */ 546 t.c_ispeed = 0; 547 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 548 t.c_ospeed = sacomconsrate; 549 t.c_cflag = sacomconscflag; 550 } else { 551 t.c_ospeed = TTYDEF_SPEED; 552 t.c_cflag = TTYDEF_CFLAG; 553 } 554 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 555 SET(t.c_cflag, CLOCAL); 556 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 557 SET(t.c_cflag, CRTSCTS); 558 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 559 SET(t.c_cflag, MDMBUF); 560 /* Make sure sacomparam() will do something. */ 561 tp->t_ospeed = 0; 562 (void) sacomparam(tp, &t); 563 tp->t_iflag = TTYDEF_IFLAG; 564 tp->t_oflag = TTYDEF_OFLAG; 565 tp->t_lflag = TTYDEF_LFLAG; 566 ttychars(tp); 567 ttsetwater(tp); 568 569 s2 = splserial(); 570 COM_LOCK(sc); 571 572 /* 573 * Turn on DTR. We must always do this, even if carrier is not 574 * present, because otherwise we'd have to use TIOCSDTR 575 * immediately after setting CLOCAL, which applications do not 576 * expect. We always assert DTR while the device is open 577 * unless explicitly requested to deassert it. 578 */ 579 sacom_modem(sc, 1); 580 581 /* Clear the input ring, and unblock. */ 582 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 583 sc->sc_rbavail = SACOM_RING_SIZE; 584 sacom_iflush(sc); 585 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 586 sacom_hwiflow(sc); 587 588 #ifdef COM_DEBUG 589 if (sacom_debug) 590 comstatus(sc, "sacomopen "); 591 #endif 592 593 COM_UNLOCK(sc); 594 splx(s2); 595 } 596 597 splx(s); 598 599 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 600 if (error) 601 goto bad; 602 603 error = (*tp->t_linesw->l_open)(dev, tp); 604 if (error) 605 goto bad; 606 607 return (0); 608 609 bad: 610 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 611 /* 612 * We failed to open the device, and nobody else had it opened. 613 * Clean up the state as appropriate. 614 */ 615 sacom_shutdown(sc); 616 } 617 618 return (error); 619 } 620 621 int 622 sacomclose(dev, flag, mode, p) 623 dev_t dev; 624 int flag, mode; 625 struct proc *p; 626 { 627 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 628 struct tty *tp = sc->sc_tty; 629 630 /* XXX This is for cons.c. */ 631 if (!ISSET(tp->t_state, TS_ISOPEN)) 632 return (0); 633 634 (*tp->t_linesw->l_close)(tp, flag); 635 ttyclose(tp); 636 637 if (COM_ISALIVE(sc) == 0) 638 return (0); 639 640 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 641 /* 642 * Although we got a last close, the device may still be in 643 * use; e.g. if this was the dialout node, and there are still 644 * processes waiting for carrier on the non-dialout node. 645 */ 646 sacom_shutdown(sc); 647 } 648 649 return (0); 650 } 651 652 int 653 sacomread(dev, uio, flag) 654 dev_t dev; 655 struct uio *uio; 656 int flag; 657 { 658 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 659 struct tty *tp = sc->sc_tty; 660 661 if (COM_ISALIVE(sc) == 0) 662 return (EIO); 663 664 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 665 } 666 667 int 668 sacomwrite(dev, uio, flag) 669 dev_t dev; 670 struct uio *uio; 671 int flag; 672 { 673 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 674 struct tty *tp = sc->sc_tty; 675 676 if (COM_ISALIVE(sc) == 0) 677 return (EIO); 678 679 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 680 } 681 682 int 683 sacompoll(dev, events, p) 684 dev_t dev; 685 int events; 686 struct proc *p; 687 { 688 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 689 struct tty *tp = sc->sc_tty; 690 691 if (COM_ISALIVE(sc) == 0) 692 return (EIO); 693 694 return ((*tp->t_linesw->l_poll)(tp, events, p)); 695 } 696 697 struct tty * 698 sacomtty(dev) 699 dev_t dev; 700 { 701 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 702 struct tty *tp = sc->sc_tty; 703 704 return (tp); 705 } 706 707 int 708 sacomioctl(dev, cmd, data, flag, p) 709 dev_t dev; 710 u_long cmd; 711 caddr_t data; 712 int flag; 713 struct proc *p; 714 { 715 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 716 struct tty *tp = sc->sc_tty; 717 int error; 718 int s; 719 720 if (COM_ISALIVE(sc) == 0) 721 return (EIO); 722 723 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 724 if (error != EPASSTHROUGH) 725 return (error); 726 727 error = ttioctl(tp, cmd, data, flag, p); 728 if (error != EPASSTHROUGH) 729 return (error); 730 731 error = 0; 732 733 s = splserial(); 734 COM_LOCK(sc); 735 736 switch (cmd) { 737 case TIOCSBRK: 738 sacom_break(sc, 1); 739 break; 740 741 case TIOCCBRK: 742 sacom_break(sc, 0); 743 break; 744 745 case TIOCSDTR: 746 sacom_modem(sc, 1); 747 break; 748 749 case TIOCCDTR: 750 sacom_modem(sc, 0); 751 break; 752 753 case TIOCGFLAGS: 754 *(int *)data = sc->sc_swflags; 755 break; 756 757 case TIOCSFLAGS: 758 error = suser(p->p_ucred, &p->p_acflag); 759 if (error) 760 break; 761 sc->sc_swflags = *(int *)data; 762 break; 763 764 case TIOCMSET: 765 case TIOCMBIS: 766 case TIOCMBIC: 767 tiocm_to_sacom(sc, cmd, *(int *)data); 768 break; 769 770 case TIOCMGET: 771 *(int *)data = sacom_to_tiocm(sc); 772 break; 773 774 default: 775 error = EPASSTHROUGH; 776 break; 777 } 778 779 COM_UNLOCK(sc); 780 splx(s); 781 782 #ifdef COM_DEBUG 783 if (sacom_debug) 784 comstatus(sc, "comioctl "); 785 #endif 786 787 return (error); 788 } 789 790 static inline void 791 sacom_schedrx(sc) 792 struct sacom_softc *sc; 793 { 794 795 sc->sc_rx_ready = 1; 796 797 /* Wake up the poller. */ 798 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 799 softintr_schedule(sc->sc_si); 800 #else 801 setsoftserial(); 802 #endif 803 } 804 805 void 806 sacom_break(sc, onoff) 807 struct sacom_softc *sc; 808 int onoff; 809 { 810 811 if (onoff) 812 SET(sc->sc_cr3, CR3_BRK); 813 else 814 CLR(sc->sc_cr3, CR3_BRK); 815 816 if (!sc->sc_heldchange) { 817 if (sc->sc_tx_busy) { 818 sc->sc_heldtbc = sc->sc_tbc; 819 sc->sc_tbc = 0; 820 sc->sc_heldchange = 1; 821 } else 822 sacom_loadchannelregs(sc); 823 } 824 } 825 826 void 827 sacom_modem(sc, onoff) 828 struct sacom_softc *sc; 829 int onoff; 830 { 831 if (!sc->sc_heldchange) { 832 if (sc->sc_tx_busy) { 833 sc->sc_heldtbc = sc->sc_tbc; 834 sc->sc_tbc = 0; 835 sc->sc_heldchange = 1; 836 } else 837 sacom_loadchannelregs(sc); 838 } 839 } 840 841 void 842 tiocm_to_sacom(sc, how, ttybits) 843 struct sacom_softc *sc; 844 u_long how; 845 int ttybits; 846 { 847 } 848 849 int 850 sacom_to_tiocm(sc) 851 struct sacom_softc *sc; 852 { 853 int ttybits = 0; 854 855 if (sc->sc_cr3 != 0) 856 SET(ttybits, TIOCM_LE); 857 858 return (ttybits); 859 } 860 861 static u_int 862 cflag2cr0(cflag) 863 tcflag_t cflag; 864 { 865 u_int cr0; 866 867 cr0 = (cflag & PARENB) ? CR0_PE : 0; 868 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 869 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 870 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 871 872 return (cr0); 873 } 874 875 int 876 sacomparam(tp, t) 877 struct tty *tp; 878 struct termios *t; 879 { 880 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 881 int ospeed = SACOMSPEED(t->c_ospeed); 882 u_int cr0; 883 int s; 884 885 if (COM_ISALIVE(sc) == 0) 886 return (EIO); 887 888 /* Check requested parameters. */ 889 if (ospeed < 0) 890 return (EINVAL); 891 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 892 return (EINVAL); 893 894 /* 895 * For the console, always force CLOCAL and !HUPCL, so that the port 896 * is always active. 897 */ 898 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 899 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 900 SET(t->c_cflag, CLOCAL); 901 CLR(t->c_cflag, HUPCL); 902 } 903 904 /* 905 * If there were no changes, don't do anything. This avoids dropping 906 * input and improves performance when all we did was frob things like 907 * VMIN and VTIME. 908 */ 909 if (tp->t_ospeed == t->c_ospeed && 910 tp->t_cflag == t->c_cflag) 911 return (0); 912 913 cr0 = cflag2cr0(t->c_cflag); 914 915 s = splserial(); 916 COM_LOCK(sc); 917 918 sc->sc_cr0 = cr0; 919 920 sc->sc_speed = ospeed; 921 922 /* And copy to tty. */ 923 tp->t_ispeed = 0; 924 tp->t_ospeed = t->c_ospeed; 925 tp->t_cflag = t->c_cflag; 926 927 if (!sc->sc_heldchange) { 928 if (sc->sc_tx_busy) { 929 sc->sc_heldtbc = sc->sc_tbc; 930 sc->sc_tbc = 0; 931 sc->sc_heldchange = 1; 932 } else 933 sacom_loadchannelregs(sc); 934 } 935 936 if (!ISSET(t->c_cflag, CHWFLOW)) { 937 /* Disable the high water mark. */ 938 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 939 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 940 sacom_schedrx(sc); 941 } 942 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 943 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 944 sacom_hwiflow(sc); 945 } 946 } 947 948 COM_UNLOCK(sc); 949 splx(s); 950 951 (void) (*tp->t_linesw->l_modem)(tp, 1); 952 953 #ifdef COM_DEBUG 954 if (sacom_debug) 955 comstatus(sc, "comparam "); 956 #endif 957 958 return (0); 959 } 960 961 void 962 sacom_iflush(sc) 963 struct sacom_softc *sc; 964 { 965 bus_space_tag_t iot = sc->sc_iot; 966 bus_space_handle_t ioh = sc->sc_ioh; 967 #ifdef DIAGNOSTIC 968 int reg; 969 #endif 970 int timo; 971 972 #ifdef DIAGNOSTIC 973 reg = 0xffff; 974 #endif 975 timo = 50; 976 /* flush any pending I/O */ 977 if (sc->sc_cr3 & CR3_RXE) { 978 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 979 && --timo) 980 #ifdef DIAGNOSTIC 981 reg = 982 #else 983 (void) 984 #endif 985 bus_space_read_4(iot, ioh, SACOM_DR); 986 } 987 #if 0 988 /* XXX is it good idea to wait TX finish? */ 989 if (sc->sc_cr3 & CR3_TXE) { 990 timo = 500; 991 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 992 && --timo) 993 delay(100); 994 } 995 #endif 996 #ifdef DIAGNOSTIC 997 if (!timo) 998 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 999 reg); 1000 #endif 1001 } 1002 1003 void 1004 sacom_loadchannelregs(sc) 1005 struct sacom_softc *sc; 1006 { 1007 bus_space_tag_t iot = sc->sc_iot; 1008 bus_space_handle_t ioh = sc->sc_ioh; 1009 1010 /* XXXXX necessary? */ 1011 sacom_iflush(sc); 1012 1013 /* Need to stop engines first. */ 1014 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1015 1016 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1017 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1018 1019 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1020 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1021 } 1022 1023 int 1024 sacomhwiflow(tp, block) 1025 struct tty *tp; 1026 int block; 1027 { 1028 #if 0 1029 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1030 int s; 1031 1032 if (COM_ISALIVE(sc) == 0) 1033 return (0); 1034 1035 if (sc->sc_mcr_rts == 0) 1036 return (0); 1037 1038 s = splserial(); 1039 COM_LOCK(sc); 1040 1041 if (block) { 1042 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1043 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1044 sacom_hwiflow(sc); 1045 } 1046 } else { 1047 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1048 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1049 sacom_schedrx(sc); 1050 } 1051 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1052 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1053 sacom_hwiflow(sc); 1054 } 1055 } 1056 1057 COM_UNLOCK(sc); 1058 splx(s); 1059 #endif 1060 return (1); 1061 } 1062 1063 /* 1064 * (un)block input via hw flowcontrol 1065 */ 1066 void 1067 sacom_hwiflow(sc) 1068 struct sacom_softc *sc; 1069 { 1070 #if 0 1071 bus_space_tag_t iot = sc->sc_iot; 1072 bus_space_handle_t ioh = sc->sc_ioh; 1073 1074 /* XXX implement */ 1075 #endif 1076 } 1077 1078 1079 void 1080 sacomstart(tp) 1081 struct tty *tp; 1082 { 1083 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1084 bus_space_tag_t iot = sc->sc_iot; 1085 bus_space_handle_t ioh = sc->sc_ioh; 1086 int s; 1087 1088 if (COM_ISALIVE(sc) == 0) 1089 return; 1090 1091 s = spltty(); 1092 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1093 goto out; 1094 1095 if (tp->t_outq.c_cc <= tp->t_lowat) { 1096 if (ISSET(tp->t_state, TS_ASLEEP)) { 1097 CLR(tp->t_state, TS_ASLEEP); 1098 wakeup(&tp->t_outq); 1099 } 1100 selwakeup(&tp->t_wsel); 1101 if (tp->t_outq.c_cc == 0) 1102 goto out; 1103 } 1104 1105 /* Grab the first contiguous region of buffer space. */ 1106 { 1107 u_char *tba; 1108 int tbc; 1109 1110 tba = tp->t_outq.c_cf; 1111 tbc = ndqb(&tp->t_outq, 0); 1112 1113 (void)splserial(); 1114 COM_LOCK(sc); 1115 1116 sc->sc_tba = tba; 1117 sc->sc_tbc = tbc; 1118 } 1119 1120 SET(tp->t_state, TS_BUSY); 1121 sc->sc_tx_busy = 1; 1122 1123 /* Enable transmit completion interrupts if necessary. */ 1124 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1125 SET(sc->sc_cr3, CR3_TIE); 1126 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1127 } 1128 1129 /* Output the first chunk of the contiguous buffer. */ 1130 sacom_filltx(sc); 1131 1132 COM_UNLOCK(sc); 1133 out: 1134 splx(s); 1135 return; 1136 } 1137 1138 void 1139 sacom_filltx(sc) 1140 struct sacom_softc *sc; 1141 { 1142 bus_space_tag_t iot = sc->sc_iot; 1143 bus_space_handle_t ioh = sc->sc_ioh; 1144 int c, n; 1145 1146 n = 0; 1147 while(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1148 & SR1_TNF) { 1149 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1150 break; 1151 c = *(sc->sc_tba + n); 1152 c &= 0xff; 1153 bus_space_write_4(iot, ioh, SACOM_DR, c); 1154 n++; 1155 } 1156 sc->sc_tbc -= n; 1157 sc->sc_tba += n; 1158 } 1159 1160 /* 1161 * Stop output on a line. 1162 */ 1163 void 1164 sacomstop(tp, flag) 1165 struct tty *tp; 1166 int flag; 1167 { 1168 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1169 int s; 1170 1171 s = splserial(); 1172 COM_LOCK(sc); 1173 if (ISSET(tp->t_state, TS_BUSY)) { 1174 /* Stop transmitting at the next chunk. */ 1175 sc->sc_tbc = 0; 1176 sc->sc_heldtbc = 0; 1177 if (!ISSET(tp->t_state, TS_TTSTOP)) 1178 SET(tp->t_state, TS_FLUSH); 1179 } 1180 COM_UNLOCK(sc); 1181 splx(s); 1182 } 1183 1184 static inline void 1185 sacom_rxsoft(sc, tp) 1186 struct sacom_softc *sc; 1187 struct tty *tp; 1188 { 1189 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1190 u_char *get, *end; 1191 u_int cc, scc; 1192 u_char sr1; 1193 int code; 1194 int s; 1195 1196 end = sc->sc_ebuf; 1197 get = sc->sc_rbget; 1198 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1199 1200 while (cc) { 1201 code = get[0]; 1202 sr1 = get[1]; 1203 if (ISSET(sr1, SR1_FRE)) 1204 SET(code, TTY_FE); 1205 if (ISSET(sr1, SR1_PRE)) 1206 SET(code, TTY_PE); 1207 if ((*rint)(code, tp) == -1) { 1208 /* 1209 * The line discipline's buffer is out of space. 1210 */ 1211 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1212 /* 1213 * We're either not using flow control, or the 1214 * line discipline didn't tell us to block for 1215 * some reason. Either way, we have no way to 1216 * know when there's more space available, so 1217 * just drop the rest of the data. 1218 */ 1219 get += cc << 1; 1220 if (get >= end) 1221 get -= SACOM_RING_SIZE << 1; 1222 cc = 0; 1223 } else { 1224 /* 1225 * Don't schedule any more receive processing 1226 * until the line discipline tells us there's 1227 * space available (through comhwiflow()). 1228 * Leave the rest of the data in the input 1229 * buffer. 1230 */ 1231 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1232 } 1233 break; 1234 } 1235 get += 2; 1236 if (get >= end) 1237 get = sc->sc_rbuf; 1238 cc--; 1239 } 1240 1241 if (cc != scc) { 1242 sc->sc_rbget = get; 1243 s = splserial(); 1244 COM_LOCK(sc); 1245 1246 cc = sc->sc_rbavail += scc - cc; 1247 /* Buffers should be ok again, release possible block. */ 1248 if (cc >= 1) { 1249 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1250 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1251 SET(sc->sc_cr3, CR3_RIE); 1252 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1253 SACOM_CR3, sc->sc_cr3); 1254 } 1255 } 1256 COM_UNLOCK(sc); 1257 splx(s); 1258 } 1259 } 1260 1261 static inline void 1262 sacom_txsoft(sc, tp) 1263 struct sacom_softc *sc; 1264 struct tty *tp; 1265 { 1266 1267 CLR(tp->t_state, TS_BUSY); 1268 if (ISSET(tp->t_state, TS_FLUSH)) 1269 CLR(tp->t_state, TS_FLUSH); 1270 else 1271 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1272 (*tp->t_linesw->l_start)(tp); 1273 } 1274 1275 static inline void 1276 sacom_stsoft(sc, tp) 1277 struct sacom_softc *sc; 1278 struct tty *tp; 1279 { 1280 } 1281 1282 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1283 void 1284 sacomsoft(arg) 1285 void *arg; 1286 { 1287 struct sacom_softc *sc = arg; 1288 struct tty *tp; 1289 1290 if (COM_ISALIVE(sc) == 0) 1291 return; 1292 1293 { 1294 #else 1295 void 1296 sacomsoft() 1297 { 1298 struct sacom_softc *sc; 1299 struct tty *tp; 1300 int unit; 1301 1302 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1303 sc = device_lookup(&sacom_cd, unit); 1304 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1305 continue; 1306 1307 if (COM_ISALIVE(sc) == 0) 1308 continue; 1309 1310 tp = sc->sc_tty; 1311 if (tp == NULL) 1312 continue; 1313 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1314 continue; 1315 #endif 1316 tp = sc->sc_tty; 1317 1318 if (sc->sc_rx_ready) { 1319 sc->sc_rx_ready = 0; 1320 sacom_rxsoft(sc, tp); 1321 } 1322 1323 if (sc->sc_st_check) { 1324 sc->sc_st_check = 0; 1325 sacom_stsoft(sc, tp); 1326 } 1327 1328 if (sc->sc_tx_done) { 1329 sc->sc_tx_done = 0; 1330 sacom_txsoft(sc, tp); 1331 } 1332 } 1333 1334 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1335 #endif 1336 } 1337 1338 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1339 /* there has got to be a better way to do comsoft() */ 1340 }} 1341 #endif 1342 1343 int 1344 sacomintr(arg) 1345 void *arg; 1346 { 1347 struct sacom_softc *sc = arg; 1348 bus_space_tag_t iot = sc->sc_iot; 1349 bus_space_handle_t ioh = sc->sc_ioh; 1350 u_char *put, *end; 1351 u_int cc; 1352 u_int sr0, sr1; 1353 1354 if (COM_ISALIVE(sc) == 0) 1355 return (0); 1356 1357 COM_LOCK(sc); 1358 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1359 if (! sr0) { 1360 COM_UNLOCK(sc); 1361 return (0); 1362 } 1363 if (ISSET(sr0, SR0_EIF)) 1364 /* XXX silently discard error bits */ 1365 bus_space_read_4(iot, ioh, SACOM_DR); 1366 if (ISSET(sr0, SR0_RBB)) 1367 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1368 if (ISSET(sr0, SR0_REB)) { 1369 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1370 #if defined(DDB) || defined(KGDB) 1371 #ifndef DDB_BREAK_CHAR 1372 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1373 console_debugger(); 1374 } 1375 #endif 1376 #endif /* DDB || KGDB */ 1377 } 1378 1379 1380 end = sc->sc_ebuf; 1381 put = sc->sc_rbput; 1382 cc = sc->sc_rbavail; 1383 1384 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1385 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1386 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1387 while (cc > 0) { 1388 if (!ISSET(sr1, SR1_RNE)) { 1389 bus_space_write_4(iot, ioh, SACOM_SR0, 1390 SR0_RID); 1391 break; 1392 } 1393 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1394 put[1] = sr1; 1395 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1396 if (put[0] == DDB_BREAK_CHAR && 1397 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1398 console_debugger(); 1399 1400 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1401 continue; 1402 } 1403 #endif 1404 put += 2; 1405 if (put >= end) 1406 put = sc->sc_rbuf; 1407 cc--; 1408 1409 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1410 } 1411 1412 /* 1413 * Current string of incoming characters ended because 1414 * no more data was available or we ran out of space. 1415 * Schedule a receive event if any data was received. 1416 * If we're out of space, turn off receive interrupts. 1417 */ 1418 sc->sc_rbput = put; 1419 sc->sc_rbavail = cc; 1420 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1421 sc->sc_rx_ready = 1; 1422 1423 /* XXX do RX hardware flow control */ 1424 1425 /* 1426 * If we're out of space, disable receive interrupts 1427 * until the queue has drained a bit. 1428 */ 1429 if (!cc) { 1430 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1431 CLR(sc->sc_cr3, CR3_RIE); 1432 bus_space_write_4(iot, ioh, SACOM_CR3, 1433 sc->sc_cr3); 1434 } 1435 } else { 1436 #ifdef DIAGNOSTIC 1437 panic("sacomintr: we shouldn't reach here\n"); 1438 #endif 1439 CLR(sc->sc_cr3, CR3_RIE); 1440 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1441 } 1442 } 1443 1444 /* 1445 * Done handling any receive interrupts. See if data can be 1446 * transmitted as well. Schedule tx done event if no data left 1447 * and tty was marked busy. 1448 */ 1449 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1450 if (ISSET(sr0, SR0_TFS)) { 1451 /* 1452 * If we've delayed a parameter change, do it now, and restart 1453 * output. 1454 * XXX sacom_loadchanelregs() waits TX completion, 1455 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1456 */ 1457 if (sc->sc_heldchange) { 1458 sacom_loadchannelregs(sc); 1459 sc->sc_heldchange = 0; 1460 sc->sc_tbc = sc->sc_heldtbc; 1461 sc->sc_heldtbc = 0; 1462 } 1463 1464 /* Output the next chunk of the contiguous buffer, if any. */ 1465 if (sc->sc_tbc > 0) { 1466 sacom_filltx(sc); 1467 } else { 1468 /* Disable transmit completion interrupts if necessary. */ 1469 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1470 CLR(sc->sc_cr3, CR3_TIE); 1471 bus_space_write_4(iot, ioh, SACOM_CR3, 1472 sc->sc_cr3); 1473 } 1474 if (sc->sc_tx_busy) { 1475 sc->sc_tx_busy = 0; 1476 sc->sc_tx_done = 1; 1477 } 1478 } 1479 } 1480 COM_UNLOCK(sc); 1481 1482 /* Wake up the poller. */ 1483 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1484 softintr_schedule(sc->sc_si); 1485 #else 1486 setsoftserial(); 1487 #endif 1488 1489 #if NRND > 0 && defined(RND_COM) 1490 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1491 #endif 1492 return (1); 1493 } 1494 1495 /* Initialization for serial console */ 1496 int 1497 sacominit(iot, iobase, baud, cflag, iohp) 1498 bus_space_tag_t iot; 1499 bus_addr_t iobase; 1500 int baud; 1501 tcflag_t cflag; 1502 bus_space_handle_t *iohp; 1503 { 1504 int brd, cr0; 1505 1506 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1507 printf("register map failed\n"); 1508 1509 /* wait for the Tx queue to drain and disable the UART */ 1510 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1511 ; 1512 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1513 1514 cr0 = cflag2cr0(cflag); 1515 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1516 1517 brd = SACOMSPEED(baud); 1518 sacomconsrate = baud; 1519 sacomconsaddr = iobase; 1520 sacomconscflag = cflag; 1521 /* XXX assumes little endian */ 1522 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1523 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1524 1525 /* enable the UART */ 1526 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1527 1528 return (0); 1529 } 1530 1531 void 1532 sacomcnprobe(cp) 1533 struct consdev *cp; 1534 { 1535 cp->cn_pri = CN_REMOTE; 1536 } 1537 1538 void 1539 sacomcninit(cp) 1540 struct consdev *cp; 1541 { 1542 if (cp == NULL) { 1543 /* XXX cp == NULL means that MMU is disabled. */ 1544 sacomconsioh = SACOM3_HW_BASE; 1545 sacomconstag = &sa11x0_bs_tag; 1546 cn_tab = &sacomcons; 1547 return; 1548 } 1549 1550 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1551 CONMODE, &sacomconsioh)) 1552 panic("can't init serial console @%x", CONADDR); 1553 cn_tab = &sacomcons; 1554 sacomconstag = &sa11x0_bs_tag; 1555 } 1556 1557 int 1558 sacomcngetc(dev) 1559 dev_t dev; 1560 { 1561 int c, s; 1562 1563 s = spltty(); /* XXX do we need this? */ 1564 1565 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1566 & SR1_RNE)) { 1567 #if defined(DDB) || defined(KGDB) 1568 #ifndef DDB_BREAK_CHAR 1569 u_int sr0; 1570 extern int db_active; 1571 1572 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1573 if (ISSET(sr0, SR0_RBB)) 1574 bus_space_write_4(sacomconstag, sacomconsioh, 1575 SACOM_SR0, SR0_RBB); 1576 if (ISSET(sr0, SR0_REB)) { 1577 bus_space_write_4(sacomconstag, sacomconsioh, 1578 SACOM_SR0, SR0_REB); 1579 if (db_active == 0) 1580 console_debugger(); 1581 } 1582 #endif 1583 #endif /* DDB || KGDB */ 1584 } 1585 1586 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1587 c &= 0xff; 1588 splx(s); 1589 1590 return (c); 1591 } 1592 1593 void 1594 sacomcnputc(dev, c) 1595 dev_t dev; 1596 int c; 1597 { 1598 int s; 1599 1600 s = spltty(); /* XXX do we need this? */ 1601 1602 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1603 & SR1_TNF)) 1604 ; 1605 1606 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1607 splx(s); 1608 } 1609 1610 void 1611 sacomcnpollc(dev, on) 1612 dev_t dev; 1613 int on; 1614 { 1615 1616 } 1617 1618 #ifdef DEBUG 1619 int 1620 sacomcncharpoll() 1621 { 1622 int c; 1623 1624 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1625 & SR1_RNE)) 1626 return -1; 1627 1628 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1629 c &= 0xff; 1630 1631 return (c); 1632 } 1633 1634 #endif 1635 1636 /* helper function to identify the com ports used by 1637 console or KGDB (and not yet autoconf attached) */ 1638 int 1639 sacom_is_console(iot, iobase, ioh) 1640 bus_space_tag_t iot; 1641 bus_addr_t iobase; 1642 bus_space_handle_t *ioh; 1643 { 1644 bus_space_handle_t help; 1645 1646 if (! sacomconsattached && 1647 iot == sacomconstag && iobase == sacomconsaddr) 1648 help = sacomconsioh; 1649 else 1650 return (0); 1651 1652 if (ioh) 1653 *ioh = help; 1654 return (1); 1655 } 1656
Indexes created Thu Oct 02 07:10:07 GMT 2025