sa11x0_com.c revision 1.1
1 /* $NetBSD: sa11x0_com.c,v 1.1 2001/07/08 23:37:52 rjs 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_ddbparam.h" 80 #include "opt_kgdb.h" 81 82 #include "rnd.h" 83 #if NRND > 0 && defined(RND_COM) 84 #include <sys/rnd.h> 85 #endif 86 87 #include <sys/param.h> 88 #include <sys/systm.h> 89 #include <sys/types.h> 90 #include <sys/conf.h> 91 #include <sys/file.h> 92 #include <sys/device.h> 93 #include <sys/kernel.h> 94 #include <sys/malloc.h> 95 #include <sys/tty.h> 96 #include <sys/uio.h> 97 #include <sys/vnode.h> 98 99 #include <dev/cons.h> 100 101 #include <machine/bus.h> 102 #include <arm/sa11x0/sa11x0_reg.h> 103 #include <arm/sa11x0/sa11x0_var.h> 104 #include <arm/sa11x0/sa11x0_comreg.h> 105 #include <arm/sa11x0/sa11x0_comvar.h> 106 107 #include "sacom.h" 108 109 cdev_decl(sacom); 110 111 static int sacom_match(struct device *, struct cfdata *, void *); 112 static void sacom_attach(struct device *, struct device *, void *); 113 static void sacom_filltx(struct sacom_softc *); 114 static void sacom_attach_subr(struct sacom_softc *); 115 #if defined(DDB) || defined(KGDB) 116 static void sacom_enable_debugport(struct sacom_softc *); 117 #endif 118 void sacom_config(struct sacom_softc *); 119 void sacom_shutdown(struct sacom_softc *); 120 static u_int cflag2cr0(tcflag_t); 121 int sacomparam(struct tty *, struct termios *); 122 void sacomstart(struct tty *); 123 void sacomstop(struct tty *, int); 124 int sacomhwiflow(struct tty *, int); 125 126 void sacom_loadchannelregs(struct sacom_softc *); 127 void sacom_hwiflow(struct sacom_softc *); 128 void sacom_break(struct sacom_softc *, int); 129 void sacom_modem(struct sacom_softc *, int); 130 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 131 int sacom_to_tiocm(struct sacom_softc *); 132 void sacom_iflush(struct sacom_softc *); 133 134 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 135 void sacomsoft(void *); 136 #else 137 void sacomsoft(void); 138 #endif 139 140 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 141 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 142 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 143 static inline void sacom_schedrx(struct sacom_softc *); 144 145 146 #define COMUNIT_MASK 0x7ffff 147 #define COMDIALOUT_MASK 0x80000 148 149 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 150 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 151 152 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 153 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 154 155 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 156 #define COM_LOCK(sc) 157 #define COM_UNLOCK(sc) 158 159 #define SET(t, f) (t) |= (f) 160 #define CLR(t, f) (t) &= ~(f) 161 #define ISSET(t, f) ((t) & (f)) 162 163 int sacomintr(void *); 164 int sacomcngetc(dev_t); 165 void sacomcnputc(dev_t, int); 166 void sacomcnpollc(dev_t, int); 167 168 void sacomcnprobe(struct consdev *); 169 void sacomcninit(struct consdev *); 170 171 extern struct bus_space sa11x0_bs_tag; 172 173 static bus_space_tag_t sacomconstag; 174 static bus_space_handle_t sacomconsioh; 175 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 176 177 static int sacomconsattached; 178 static int sacomconsrate; 179 static tcflag_t sacomconscflag; 180 181 struct cfattach sacom_ca = { 182 sizeof(struct sacom_softc), sacom_match, sacom_attach 183 }; 184 extern struct cfdriver sacom_cd; 185 186 struct consdev sacomcons = { 187 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 188 NODEV, CN_NORMAL 189 }; 190 191 #ifndef CONMODE 192 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 193 #endif 194 #ifndef CONSPEED 195 #define CONSPEED 9600 196 #endif 197 #ifndef CONADDR 198 #define CONADDR SACOM3_BASE 199 #endif 200 201 static int 202 sacom_match(parent, match, aux) 203 struct device *parent; 204 struct cfdata *match; 205 void *aux; 206 { 207 return (1); 208 } 209 210 void 211 sacom_attach(parent, self, aux) 212 struct device *parent; 213 struct device *self; 214 void *aux; 215 { 216 struct sacom_softc *sc = (struct sacom_softc*)self; 217 struct sa11x0_attach_args *sa = aux; 218 219 printf("\n"); 220 221 sc->sc_iot = sa->sa_iot; 222 sc->sc_baseaddr = sa->sa_addr; 223 224 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 225 &sc->sc_ioh)) { 226 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 227 return; 228 } 229 230 printf("%s: ", sc->sc_dev.dv_xname); 231 switch(sc->sc_baseaddr) { 232 case 0x80050000: 233 printf("SA11x0 UART3\n"); 234 break; 235 case 0x80010000: 236 printf("SA11x0 UART1\n"); 237 break; 238 case 0x80030000: 239 printf("SA11x0 UART2 (IRDA)\n"); 240 break; 241 default: 242 printf("unknown SA11x0 UART\n"); 243 break; 244 } 245 246 sacom_attach_subr(sc); 247 248 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 249 } 250 251 void 252 sacom_attach_subr(sc) 253 struct sacom_softc *sc; 254 { 255 bus_addr_t iobase = sc->sc_baseaddr; 256 bus_space_tag_t iot = sc->sc_iot; 257 struct tty *tp; 258 259 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 260 simple_lock_init(&sc->sc_lock); 261 #endif 262 263 /* XXX Do we need to disable interrupts here? */ 264 265 if (iot == sacomconstag && iobase == sacomconsaddr) { 266 sacomconsattached = 1; 267 sc->sc_speed = SACOMSPEED(sacomconsrate); 268 269 /* Make sure the console is always "hardwired". */ 270 delay(10000); /* wait for output to finish */ 271 SET(sc->sc_hwflags, COM_HW_CONSOLE); 272 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 273 } 274 275 tp = ttymalloc(); 276 tp->t_oproc = sacomstart; 277 tp->t_param = sacomparam; 278 tp->t_hwiflow = sacomhwiflow; 279 280 sc->sc_tty = tp; 281 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 282 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 283 sc->sc_rbavail = SACOM_RING_SIZE; 284 if (sc->sc_rbuf == NULL) { 285 printf("%s: unable to allocate ring buffer\n", 286 sc->sc_dev.dv_xname); 287 return; 288 } 289 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 290 sc->sc_tbc = 0; 291 292 tty_attach(tp); 293 294 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 295 int maj; 296 297 /* locate the major number */ 298 for (maj = 0; maj < nchrdev; maj++) 299 if (cdevsw[maj].d_open == sacomopen) 300 break; 301 302 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 303 304 delay(10000); /* XXX */ 305 printf("%s: console\n", sc->sc_dev.dv_xname); 306 delay(10000); /* XXX */ 307 } 308 309 310 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 311 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 312 #endif 313 314 #if NRND > 0 && defined(RND_COM) 315 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 316 RND_TYPE_TTY, 0); 317 #endif 318 319 /* if there are no enable/disable functions, assume the device 320 is always enabled */ 321 if (!sc->enable) 322 sc->enabled = 1; 323 324 sacom_config(sc); 325 326 SET(sc->sc_hwflags, COM_HW_DEV_OK); 327 } 328 329 /* This is necessary when dynamically changing SAIP configuration. */ 330 int 331 sacom_detach(self, flags) 332 struct device *self; 333 int flags; 334 { 335 struct sacom_softc *sc = (struct sacom_softc *)self; 336 int maj, mn; 337 338 /* locate the major number */ 339 for (maj = 0; maj < nchrdev; maj++) 340 if (cdevsw[maj].d_open == sacomopen) 341 break; 342 343 /* Nuke the vnodes for any open instances. */ 344 mn = self->dv_unit; 345 vdevgone(maj, mn, mn, VCHR); 346 347 mn |= COMDIALOUT_MASK; 348 vdevgone(maj, mn, mn, VCHR); 349 350 /* Free the receive buffer. */ 351 free(sc->sc_rbuf, M_DEVBUF); 352 353 /* Detach and free the tty. */ 354 tty_detach(sc->sc_tty); 355 ttyfree(sc->sc_tty); 356 357 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 358 /* Unhook the soft interrupt handler. */ 359 softintr_disestablish(sc->sc_si); 360 #endif 361 362 #if NRND > 0 && defined(RND_COM) 363 /* Unhook the entropy source. */ 364 rnd_detach_source(&sc->rnd_source); 365 #endif 366 367 return (0); 368 } 369 370 void 371 sacom_config(sc) 372 struct sacom_softc *sc; 373 { 374 bus_space_tag_t iot = sc->sc_iot; 375 bus_space_handle_t ioh = sc->sc_ioh; 376 377 /* Disable engine before configuring the device. */ 378 sc->sc_cr3 = 0; 379 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 380 381 #ifdef DDB 382 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 383 sacom_enable_debugport(sc); 384 #endif 385 } 386 387 #ifdef DDB 388 static void 389 sacom_enable_debugport(sc) 390 struct sacom_softc *sc; 391 { 392 bus_space_tag_t iot = sc->sc_iot; 393 bus_space_handle_t ioh = sc->sc_ioh; 394 int s; 395 396 s = splserial(); 397 COM_LOCK(sc); 398 sc->sc_cr3 = CR3_RXE | CR3_TXE; 399 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 400 COM_UNLOCK(sc); 401 splx(s); 402 } 403 #endif 404 405 int 406 sacom_activate(self, act) 407 struct device *self; 408 enum devact act; 409 { 410 struct sacom_softc *sc = (struct sacom_softc *)self; 411 int s, rv = 0; 412 413 s = splserial(); 414 COM_LOCK(sc); 415 switch (act) { 416 case DVACT_ACTIVATE: 417 rv = EOPNOTSUPP; 418 break; 419 420 case DVACT_DEACTIVATE: 421 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 422 rv = EBUSY; 423 break; 424 } 425 426 if (sc->disable != NULL && sc->enabled != 0) { 427 (*sc->disable)(sc); 428 sc->enabled = 0; 429 } 430 break; 431 } 432 433 COM_UNLOCK(sc); 434 splx(s); 435 return (rv); 436 } 437 438 void 439 sacom_shutdown(sc) 440 struct sacom_softc *sc; 441 { 442 struct tty *tp = sc->sc_tty; 443 int s; 444 445 s = splserial(); 446 COM_LOCK(sc); 447 448 /* Clear any break condition set with TIOCSBRK. */ 449 sacom_break(sc, 0); 450 451 /* 452 * Hang up if necessary. Wait a bit, so the other side has time to 453 * notice even if we immediately open the port again. 454 * Avoid tsleeping above splhigh(). 455 */ 456 if (ISSET(tp->t_cflag, HUPCL)) { 457 sacom_modem(sc, 0); 458 COM_UNLOCK(sc); 459 splx(s); 460 /* XXX tsleep will only timeout */ 461 (void) tsleep(sc, TTIPRI, ttclos, hz); 462 s = splserial(); 463 COM_LOCK(sc); 464 } 465 466 /* Turn off interrupts. */ 467 sc->sc_cr3 = 0; 468 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 469 470 if (sc->disable) { 471 #ifdef DIAGNOSTIC 472 if (!sc->enabled) 473 panic("sacom_shutdown: not enabled?"); 474 #endif 475 (*sc->disable)(sc); 476 sc->enabled = 0; 477 } 478 COM_UNLOCK(sc); 479 splx(s); 480 } 481 482 int 483 sacomopen(dev, flag, mode, p) 484 dev_t dev; 485 int flag, mode; 486 struct proc *p; 487 { 488 struct sacom_softc *sc; 489 struct tty *tp; 490 int s, s2; 491 int error; 492 493 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 494 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 495 sc->sc_rbuf == NULL) 496 return (ENXIO); 497 498 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 499 return (ENXIO); 500 501 tp = sc->sc_tty; 502 503 if (ISSET(tp->t_state, TS_ISOPEN) && 504 ISSET(tp->t_state, TS_XCLUDE) && 505 p->p_ucred->cr_uid != 0) 506 return (EBUSY); 507 508 s = spltty(); 509 510 /* 511 * Do the following iff this is a first open. 512 */ 513 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 514 struct termios t; 515 516 tp->t_dev = dev; 517 518 s2 = splserial(); 519 COM_LOCK(sc); 520 521 if (sc->enable) { 522 if ((*sc->enable)(sc)) { 523 COM_UNLOCK(sc); 524 splx(s2); 525 splx(s); 526 printf("%s: device enable failed\n", 527 sc->sc_dev.dv_xname); 528 return (EIO); 529 } 530 sc->enabled = 1; 531 sacom_config(sc); 532 } 533 534 /* Turn on interrupts. */ 535 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 536 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 537 sc->sc_cr3); 538 539 540 COM_UNLOCK(sc); 541 splx(s2); 542 543 /* 544 * Initialize the termios status to the defaults. Add in the 545 * sticky bits from TIOCSFLAGS. 546 */ 547 t.c_ispeed = 0; 548 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 549 t.c_ospeed = sacomconsrate; 550 t.c_cflag = sacomconscflag; 551 } else { 552 t.c_ospeed = TTYDEF_SPEED; 553 t.c_cflag = TTYDEF_CFLAG; 554 } 555 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 556 SET(t.c_cflag, CLOCAL); 557 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 558 SET(t.c_cflag, CRTSCTS); 559 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 560 SET(t.c_cflag, MDMBUF); 561 /* Make sure sacomparam() will do something. */ 562 tp->t_ospeed = 0; 563 (void) sacomparam(tp, &t); 564 tp->t_iflag = TTYDEF_IFLAG; 565 tp->t_oflag = TTYDEF_OFLAG; 566 tp->t_lflag = TTYDEF_LFLAG; 567 ttychars(tp); 568 ttsetwater(tp); 569 570 s2 = splserial(); 571 COM_LOCK(sc); 572 573 /* 574 * Turn on DTR. We must always do this, even if carrier is not 575 * present, because otherwise we'd have to use TIOCSDTR 576 * immediately after setting CLOCAL, which applications do not 577 * expect. We always assert DTR while the device is open 578 * unless explicitly requested to deassert it. 579 */ 580 sacom_modem(sc, 1); 581 582 /* Clear the input ring, and unblock. */ 583 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 584 sc->sc_rbavail = SACOM_RING_SIZE; 585 sacom_iflush(sc); 586 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 587 sacom_hwiflow(sc); 588 589 #ifdef COM_DEBUG 590 if (sacom_debug) 591 comstatus(sc, "sacomopen "); 592 #endif 593 594 COM_UNLOCK(sc); 595 splx(s2); 596 } 597 598 splx(s); 599 600 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 601 if (error) 602 goto bad; 603 604 error = (*tp->t_linesw->l_open)(dev, tp); 605 if (error) 606 goto bad; 607 608 return (0); 609 610 bad: 611 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 612 /* 613 * We failed to open the device, and nobody else had it opened. 614 * Clean up the state as appropriate. 615 */ 616 sacom_shutdown(sc); 617 } 618 619 return (error); 620 } 621 622 int 623 sacomclose(dev, flag, mode, p) 624 dev_t dev; 625 int flag, mode; 626 struct proc *p; 627 { 628 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 629 struct tty *tp = sc->sc_tty; 630 631 /* XXX This is for cons.c. */ 632 if (!ISSET(tp->t_state, TS_ISOPEN)) 633 return (0); 634 635 (*tp->t_linesw->l_close)(tp, flag); 636 ttyclose(tp); 637 638 if (COM_ISALIVE(sc) == 0) 639 return (0); 640 641 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 642 /* 643 * Although we got a last close, the device may still be in 644 * use; e.g. if this was the dialout node, and there are still 645 * processes waiting for carrier on the non-dialout node. 646 */ 647 sacom_shutdown(sc); 648 } 649 650 return (0); 651 } 652 653 int 654 sacomread(dev, uio, flag) 655 dev_t dev; 656 struct uio *uio; 657 int flag; 658 { 659 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 660 struct tty *tp = sc->sc_tty; 661 662 if (COM_ISALIVE(sc) == 0) 663 return (EIO); 664 665 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 666 } 667 668 int 669 sacomwrite(dev, uio, flag) 670 dev_t dev; 671 struct uio *uio; 672 int flag; 673 { 674 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 675 struct tty *tp = sc->sc_tty; 676 677 if (COM_ISALIVE(sc) == 0) 678 return (EIO); 679 680 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 681 } 682 683 int 684 sacompoll(dev, events, p) 685 dev_t dev; 686 int events; 687 struct proc *p; 688 { 689 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 690 struct tty *tp = sc->sc_tty; 691 692 if (COM_ISALIVE(sc) == 0) 693 return (EIO); 694 695 return ((*tp->t_linesw->l_poll)(tp, events, p)); 696 } 697 698 struct tty * 699 sacomtty(dev) 700 dev_t dev; 701 { 702 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 703 struct tty *tp = sc->sc_tty; 704 705 return (tp); 706 } 707 708 int 709 sacomioctl(dev, cmd, data, flag, p) 710 dev_t dev; 711 u_long cmd; 712 caddr_t data; 713 int flag; 714 struct proc *p; 715 { 716 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 717 struct tty *tp = sc->sc_tty; 718 int error; 719 int s; 720 721 if (COM_ISALIVE(sc) == 0) 722 return (EIO); 723 724 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 725 if (error >= 0) 726 return (error); 727 728 error = ttioctl(tp, cmd, data, flag, p); 729 if (error >= 0) 730 return (error); 731 732 error = 0; 733 734 s = splserial(); 735 COM_LOCK(sc); 736 737 switch (cmd) { 738 case TIOCSBRK: 739 sacom_break(sc, 1); 740 break; 741 742 case TIOCCBRK: 743 sacom_break(sc, 0); 744 break; 745 746 case TIOCSDTR: 747 sacom_modem(sc, 1); 748 break; 749 750 case TIOCCDTR: 751 sacom_modem(sc, 0); 752 break; 753 754 case TIOCGFLAGS: 755 *(int *)data = sc->sc_swflags; 756 break; 757 758 case TIOCSFLAGS: 759 error = suser(p->p_ucred, &p->p_acflag); 760 if (error) 761 break; 762 sc->sc_swflags = *(int *)data; 763 break; 764 765 case TIOCMSET: 766 case TIOCMBIS: 767 case TIOCMBIC: 768 tiocm_to_sacom(sc, cmd, *(int *)data); 769 break; 770 771 case TIOCMGET: 772 *(int *)data = sacom_to_tiocm(sc); 773 break; 774 775 default: 776 error = ENOTTY; 777 break; 778 } 779 780 COM_UNLOCK(sc); 781 splx(s); 782 783 #ifdef COM_DEBUG 784 if (sacom_debug) 785 comstatus(sc, "comioctl "); 786 #endif 787 788 return (error); 789 } 790 791 static inline void 792 sacom_schedrx(sc) 793 struct sacom_softc *sc; 794 { 795 796 sc->sc_rx_ready = 1; 797 798 /* Wake up the poller. */ 799 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 800 softintr_schedule(sc->sc_si); 801 #else 802 setsoftserial(); 803 #endif 804 } 805 806 void 807 sacom_break(sc, onoff) 808 struct sacom_softc *sc; 809 int onoff; 810 { 811 812 if (onoff) 813 SET(sc->sc_cr3, CR3_BRK); 814 else 815 CLR(sc->sc_cr3, CR3_BRK); 816 817 if (!sc->sc_heldchange) { 818 if (sc->sc_tx_busy) { 819 sc->sc_heldtbc = sc->sc_tbc; 820 sc->sc_tbc = 0; 821 sc->sc_heldchange = 1; 822 } else 823 sacom_loadchannelregs(sc); 824 } 825 } 826 827 void 828 sacom_modem(sc, onoff) 829 struct sacom_softc *sc; 830 int onoff; 831 { 832 if (!sc->sc_heldchange) { 833 if (sc->sc_tx_busy) { 834 sc->sc_heldtbc = sc->sc_tbc; 835 sc->sc_tbc = 0; 836 sc->sc_heldchange = 1; 837 } else 838 sacom_loadchannelregs(sc); 839 } 840 } 841 842 void 843 tiocm_to_sacom(sc, how, ttybits) 844 struct sacom_softc *sc; 845 u_long how; 846 int ttybits; 847 { 848 } 849 850 int 851 sacom_to_tiocm(sc) 852 struct sacom_softc *sc; 853 { 854 int ttybits = 0; 855 856 if (sc->sc_cr3 != 0) 857 SET(ttybits, TIOCM_LE); 858 859 return (ttybits); 860 } 861 862 static u_int 863 cflag2cr0(cflag) 864 tcflag_t cflag; 865 { 866 u_int cr0; 867 868 cr0 = (cflag & PARENB) ? CR0_PE : 0; 869 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 870 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 871 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 872 873 return (cr0); 874 } 875 876 int 877 sacomparam(tp, t) 878 struct tty *tp; 879 struct termios *t; 880 { 881 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 882 int ospeed = SACOMSPEED(t->c_ospeed); 883 u_int cr0; 884 int s; 885 886 if (COM_ISALIVE(sc) == 0) 887 return (EIO); 888 889 /* Check requested parameters. */ 890 if (ospeed < 0) 891 return (EINVAL); 892 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 893 return (EINVAL); 894 895 /* 896 * For the console, always force CLOCAL and !HUPCL, so that the port 897 * is always active. 898 */ 899 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 900 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 901 SET(t->c_cflag, CLOCAL); 902 CLR(t->c_cflag, HUPCL); 903 } 904 905 /* 906 * If there were no changes, don't do anything. This avoids dropping 907 * input and improves performance when all we did was frob things like 908 * VMIN and VTIME. 909 */ 910 if (tp->t_ospeed == t->c_ospeed && 911 tp->t_cflag == t->c_cflag) 912 return (0); 913 914 cr0 = cflag2cr0(t->c_cflag); 915 916 s = splserial(); 917 COM_LOCK(sc); 918 919 sc->sc_cr0 = cr0; 920 921 sc->sc_speed = ospeed; 922 923 /* And copy to tty. */ 924 tp->t_ispeed = 0; 925 tp->t_ospeed = t->c_ospeed; 926 tp->t_cflag = t->c_cflag; 927 928 if (!sc->sc_heldchange) { 929 if (sc->sc_tx_busy) { 930 sc->sc_heldtbc = sc->sc_tbc; 931 sc->sc_tbc = 0; 932 sc->sc_heldchange = 1; 933 } else 934 sacom_loadchannelregs(sc); 935 } 936 937 if (!ISSET(t->c_cflag, CHWFLOW)) { 938 /* Disable the high water mark. */ 939 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 940 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 941 sacom_schedrx(sc); 942 } 943 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 944 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 945 sacom_hwiflow(sc); 946 } 947 } 948 949 COM_UNLOCK(sc); 950 splx(s); 951 952 (void) (*tp->t_linesw->l_modem)(tp, 1); 953 954 #ifdef COM_DEBUG 955 if (sacom_debug) 956 comstatus(sc, "comparam "); 957 #endif 958 959 return (0); 960 } 961 962 void 963 sacom_iflush(sc) 964 struct sacom_softc *sc; 965 { 966 bus_space_tag_t iot = sc->sc_iot; 967 bus_space_handle_t ioh = sc->sc_ioh; 968 #ifdef DIAGNOSTIC 969 int reg; 970 #endif 971 int timo; 972 973 #ifdef DIAGNOSTIC 974 reg = 0xffff; 975 #endif 976 timo = 50; 977 /* flush any pending I/O */ 978 if (sc->sc_cr3 & CR3_RXE) { 979 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 980 && --timo) 981 #ifdef DIAGNOSTIC 982 reg = 983 #else 984 (void) 985 #endif 986 bus_space_read_4(iot, ioh, SACOM_DR); 987 } 988 #if 0 989 /* XXX is it good idea to wait TX finish? */ 990 if (sc->sc_cr3 & CR3_TXE) { 991 timo = 500; 992 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 993 && --timo) 994 delay(100); 995 } 996 #endif 997 #ifdef DIAGNOSTIC 998 if (!timo) 999 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1000 reg); 1001 #endif 1002 } 1003 1004 void 1005 sacom_loadchannelregs(sc) 1006 struct sacom_softc *sc; 1007 { 1008 bus_space_tag_t iot = sc->sc_iot; 1009 bus_space_handle_t ioh = sc->sc_ioh; 1010 1011 /* XXXXX necessary? */ 1012 sacom_iflush(sc); 1013 1014 /* Need to stop engines first. */ 1015 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1016 1017 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1018 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1019 1020 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1021 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1022 } 1023 1024 int 1025 sacomhwiflow(tp, block) 1026 struct tty *tp; 1027 int block; 1028 { 1029 #if 0 1030 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1031 int s; 1032 1033 if (COM_ISALIVE(sc) == 0) 1034 return (0); 1035 1036 if (sc->sc_mcr_rts == 0) 1037 return (0); 1038 1039 s = splserial(); 1040 COM_LOCK(sc); 1041 1042 if (block) { 1043 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1044 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1045 sacom_hwiflow(sc); 1046 } 1047 } else { 1048 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1049 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1050 sacom_schedrx(sc); 1051 } 1052 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1053 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1054 sacom_hwiflow(sc); 1055 } 1056 } 1057 1058 COM_UNLOCK(sc); 1059 splx(s); 1060 #endif 1061 return (1); 1062 } 1063 1064 /* 1065 * (un)block input via hw flowcontrol 1066 */ 1067 void 1068 sacom_hwiflow(sc) 1069 struct sacom_softc *sc; 1070 { 1071 #if 0 1072 bus_space_tag_t iot = sc->sc_iot; 1073 bus_space_handle_t ioh = sc->sc_ioh; 1074 1075 /* XXX implement */ 1076 #endif 1077 } 1078 1079 1080 void 1081 sacomstart(tp) 1082 struct tty *tp; 1083 { 1084 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1085 bus_space_tag_t iot = sc->sc_iot; 1086 bus_space_handle_t ioh = sc->sc_ioh; 1087 int s; 1088 1089 if (COM_ISALIVE(sc) == 0) 1090 return; 1091 1092 s = spltty(); 1093 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1094 goto out; 1095 1096 if (tp->t_outq.c_cc <= tp->t_lowat) { 1097 if (ISSET(tp->t_state, TS_ASLEEP)) { 1098 CLR(tp->t_state, TS_ASLEEP); 1099 wakeup(&tp->t_outq); 1100 } 1101 selwakeup(&tp->t_wsel); 1102 if (tp->t_outq.c_cc == 0) 1103 goto out; 1104 } 1105 1106 /* Grab the first contiguous region of buffer space. */ 1107 { 1108 u_char *tba; 1109 int tbc; 1110 1111 tba = tp->t_outq.c_cf; 1112 tbc = ndqb(&tp->t_outq, 0); 1113 1114 (void)splserial(); 1115 COM_LOCK(sc); 1116 1117 sc->sc_tba = tba; 1118 sc->sc_tbc = tbc; 1119 } 1120 1121 SET(tp->t_state, TS_BUSY); 1122 sc->sc_tx_busy = 1; 1123 1124 /* Enable transmit completion interrupts if necessary. */ 1125 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1126 SET(sc->sc_cr3, CR3_TIE); 1127 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1128 } 1129 1130 /* Output the first chunk of the contiguous buffer. */ 1131 sacom_filltx(sc); 1132 1133 COM_UNLOCK(sc); 1134 out: 1135 splx(s); 1136 return; 1137 } 1138 1139 void 1140 sacom_filltx(sc) 1141 struct sacom_softc *sc; 1142 { 1143 bus_space_tag_t iot = sc->sc_iot; 1144 bus_space_handle_t ioh = sc->sc_ioh; 1145 int c, n; 1146 1147 n = 0; 1148 while(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1149 & SR1_TNF) { 1150 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1151 break; 1152 c = *(sc->sc_tba + n); 1153 c &= 0xff; 1154 bus_space_write_4(iot, ioh, SACOM_DR, c); 1155 n++; 1156 } 1157 sc->sc_tbc -= n; 1158 sc->sc_tba += n; 1159 } 1160 1161 /* 1162 * Stop output on a line. 1163 */ 1164 void 1165 sacomstop(tp, flag) 1166 struct tty *tp; 1167 int flag; 1168 { 1169 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1170 int s; 1171 1172 s = splserial(); 1173 COM_LOCK(sc); 1174 if (ISSET(tp->t_state, TS_BUSY)) { 1175 /* Stop transmitting at the next chunk. */ 1176 sc->sc_tbc = 0; 1177 sc->sc_heldtbc = 0; 1178 if (!ISSET(tp->t_state, TS_TTSTOP)) 1179 SET(tp->t_state, TS_FLUSH); 1180 } 1181 COM_UNLOCK(sc); 1182 splx(s); 1183 } 1184 1185 static inline void 1186 sacom_rxsoft(sc, tp) 1187 struct sacom_softc *sc; 1188 struct tty *tp; 1189 { 1190 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1191 u_char *get, *end; 1192 u_int cc, scc; 1193 u_char sr1; 1194 int code; 1195 int s; 1196 1197 end = sc->sc_ebuf; 1198 get = sc->sc_rbget; 1199 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1200 1201 while (cc) { 1202 code = get[0]; 1203 sr1 = get[1]; 1204 if (ISSET(sr1, SR1_FRE)) 1205 SET(code, TTY_FE); 1206 if (ISSET(sr1, SR1_PRE)) 1207 SET(code, TTY_PE); 1208 if ((*rint)(code, tp) == -1) { 1209 /* 1210 * The line discipline's buffer is out of space. 1211 */ 1212 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1213 /* 1214 * We're either not using flow control, or the 1215 * line discipline didn't tell us to block for 1216 * some reason. Either way, we have no way to 1217 * know when there's more space available, so 1218 * just drop the rest of the data. 1219 */ 1220 get += cc << 1; 1221 if (get >= end) 1222 get -= SACOM_RING_SIZE << 1; 1223 cc = 0; 1224 } else { 1225 /* 1226 * Don't schedule any more receive processing 1227 * until the line discipline tells us there's 1228 * space available (through comhwiflow()). 1229 * Leave the rest of the data in the input 1230 * buffer. 1231 */ 1232 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1233 } 1234 break; 1235 } 1236 get += 2; 1237 if (get >= end) 1238 get = sc->sc_rbuf; 1239 cc--; 1240 } 1241 1242 if (cc != scc) { 1243 sc->sc_rbget = get; 1244 s = splserial(); 1245 COM_LOCK(sc); 1246 1247 cc = sc->sc_rbavail += scc - cc; 1248 /* Buffers should be ok again, release possible block. */ 1249 if (cc >= 1) { 1250 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1251 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1252 SET(sc->sc_cr3, CR3_RIE); 1253 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1254 SACOM_CR3, sc->sc_cr3); 1255 } 1256 } 1257 COM_UNLOCK(sc); 1258 splx(s); 1259 } 1260 } 1261 1262 static inline void 1263 sacom_txsoft(sc, tp) 1264 struct sacom_softc *sc; 1265 struct tty *tp; 1266 { 1267 1268 CLR(tp->t_state, TS_BUSY); 1269 if (ISSET(tp->t_state, TS_FLUSH)) 1270 CLR(tp->t_state, TS_FLUSH); 1271 else 1272 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1273 (*tp->t_linesw->l_start)(tp); 1274 } 1275 1276 static inline void 1277 sacom_stsoft(sc, tp) 1278 struct sacom_softc *sc; 1279 struct tty *tp; 1280 { 1281 } 1282 1283 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1284 void 1285 sacomsoft(arg) 1286 void *arg; 1287 { 1288 struct sacom_softc *sc = arg; 1289 struct tty *tp; 1290 1291 if (COM_ISALIVE(sc) == 0) 1292 return; 1293 1294 { 1295 #else 1296 void 1297 sacomsoft() 1298 { 1299 struct sacom_softc *sc; 1300 struct tty *tp; 1301 int unit; 1302 1303 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1304 sc = device_lookup(&sacom_cd, unit); 1305 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1306 continue; 1307 1308 if (COM_ISALIVE(sc) == 0) 1309 continue; 1310 1311 tp = sc->sc_tty; 1312 if (tp == NULL) 1313 continue; 1314 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1315 continue; 1316 #endif 1317 tp = sc->sc_tty; 1318 1319 if (sc->sc_rx_ready) { 1320 sc->sc_rx_ready = 0; 1321 sacom_rxsoft(sc, tp); 1322 } 1323 1324 if (sc->sc_st_check) { 1325 sc->sc_st_check = 0; 1326 sacom_stsoft(sc, tp); 1327 } 1328 1329 if (sc->sc_tx_done) { 1330 sc->sc_tx_done = 0; 1331 sacom_txsoft(sc, tp); 1332 } 1333 } 1334 1335 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1336 #endif 1337 } 1338 1339 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1340 /* there has got to be a better way to do comsoft() */ 1341 }} 1342 #endif 1343 1344 int 1345 sacomintr(arg) 1346 void *arg; 1347 { 1348 struct sacom_softc *sc = arg; 1349 bus_space_tag_t iot = sc->sc_iot; 1350 bus_space_handle_t ioh = sc->sc_ioh; 1351 u_char *put, *end; 1352 u_int cc; 1353 u_int sr0, sr1; 1354 1355 if (COM_ISALIVE(sc) == 0) 1356 return (0); 1357 1358 COM_LOCK(sc); 1359 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1360 if (! sr0) { 1361 COM_UNLOCK(sc); 1362 return (0); 1363 } 1364 if (ISSET(sr0, SR0_EIF)) 1365 /* XXX silently discard error bits */ 1366 bus_space_read_4(iot, ioh, SACOM_DR); 1367 if (ISSET(sr0, SR0_RBB)) 1368 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1369 if (ISSET(sr0, SR0_REB)) { 1370 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1371 #if defined(DDB) || defined(KGDB) 1372 #ifndef DDB_BREAK_CHAR 1373 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1374 console_debugger(); 1375 } 1376 #endif 1377 #endif /* DDB || KGDB */ 1378 } 1379 1380 1381 end = sc->sc_ebuf; 1382 put = sc->sc_rbput; 1383 cc = sc->sc_rbavail; 1384 1385 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1386 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1387 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1388 while (cc > 0) { 1389 if (!ISSET(sr1, SR1_RNE)) { 1390 bus_space_write_4(iot, ioh, SACOM_SR0, 1391 SR0_RID); 1392 break; 1393 } 1394 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1395 put[1] = sr1; 1396 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1397 if (put[0] == DDB_BREAK_CHAR && 1398 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1399 console_debugger(); 1400 1401 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1402 continue; 1403 } 1404 #endif 1405 put += 2; 1406 if (put >= end) 1407 put = sc->sc_rbuf; 1408 cc--; 1409 1410 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1411 } 1412 1413 /* 1414 * Current string of incoming characters ended because 1415 * no more data was available or we ran out of space. 1416 * Schedule a receive event if any data was received. 1417 * If we're out of space, turn off receive interrupts. 1418 */ 1419 sc->sc_rbput = put; 1420 sc->sc_rbavail = cc; 1421 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1422 sc->sc_rx_ready = 1; 1423 1424 /* XXX do RX hardware flow control */ 1425 1426 /* 1427 * If we're out of space, disable receive interrupts 1428 * until the queue has drained a bit. 1429 */ 1430 if (!cc) { 1431 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1432 CLR(sc->sc_cr3, CR3_RIE); 1433 bus_space_write_4(iot, ioh, SACOM_CR3, 1434 sc->sc_cr3); 1435 } 1436 } else { 1437 #ifdef DIAGNOSTIC 1438 panic("sacomintr: we shouldn't reach here\n"); 1439 #endif 1440 CLR(sc->sc_cr3, CR3_RIE); 1441 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1442 } 1443 } 1444 1445 /* 1446 * Done handling any receive interrupts. See if data can be 1447 * transmitted as well. Schedule tx done event if no data left 1448 * and tty was marked busy. 1449 */ 1450 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1451 if (ISSET(sr0, SR0_TFS)) { 1452 /* 1453 * If we've delayed a parameter change, do it now, and restart 1454 * output. 1455 * XXX sacom_loadchanelregs() waits TX completion, 1456 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1457 */ 1458 if (sc->sc_heldchange) { 1459 sacom_loadchannelregs(sc); 1460 sc->sc_heldchange = 0; 1461 sc->sc_tbc = sc->sc_heldtbc; 1462 sc->sc_heldtbc = 0; 1463 } 1464 1465 /* Output the next chunk of the contiguous buffer, if any. */ 1466 if (sc->sc_tbc > 0) { 1467 sacom_filltx(sc); 1468 } else { 1469 /* Disable transmit completion interrupts if necessary. */ 1470 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1471 CLR(sc->sc_cr3, CR3_TIE); 1472 bus_space_write_4(iot, ioh, SACOM_CR3, 1473 sc->sc_cr3); 1474 } 1475 if (sc->sc_tx_busy) { 1476 sc->sc_tx_busy = 0; 1477 sc->sc_tx_done = 1; 1478 } 1479 } 1480 } 1481 COM_UNLOCK(sc); 1482 1483 /* Wake up the poller. */ 1484 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1485 softintr_schedule(sc->sc_si); 1486 #else 1487 setsoftserial(); 1488 #endif 1489 1490 #if NRND > 0 && defined(RND_COM) 1491 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1492 #endif 1493 return (1); 1494 } 1495 1496 /* Initialization for serial console */ 1497 int 1498 sacominit(iot, iobase, baud, cflag, iohp) 1499 bus_space_tag_t iot; 1500 bus_addr_t iobase; 1501 int baud; 1502 tcflag_t cflag; 1503 bus_space_handle_t *iohp; 1504 { 1505 int brd, cr0; 1506 1507 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1508 printf("register map failed\n"); 1509 1510 /* wait for the Tx queue to drain and disable the UART */ 1511 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1512 ; 1513 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1514 1515 cr0 = cflag2cr0(cflag); 1516 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1517 1518 brd = SACOMSPEED(baud); 1519 sacomconsrate = baud; 1520 sacomconsaddr = iobase; 1521 sacomconscflag = cflag; 1522 /* XXX assumes little endian */ 1523 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1524 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1525 1526 /* enable the UART */ 1527 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1528 1529 return (0); 1530 } 1531 1532 void 1533 sacomcnprobe(cp) 1534 struct consdev *cp; 1535 { 1536 cp->cn_pri = CN_REMOTE; 1537 } 1538 1539 void 1540 sacomcninit(cp) 1541 struct consdev *cp; 1542 { 1543 if (cp == NULL) { 1544 /* XXX cp == NULL means that MMU is disabled. */ 1545 sacomconsioh = SACOM3_HW_BASE; 1546 sacomconstag = &sa11x0_bs_tag; 1547 cn_tab = &sacomcons; 1548 return; 1549 } 1550 1551 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1552 CONMODE, &sacomconsioh)) 1553 panic("can't init serial console @%x", CONADDR); 1554 cn_tab = &sacomcons; 1555 sacomconstag = &sa11x0_bs_tag; 1556 } 1557 1558 int 1559 sacomcngetc(dev) 1560 dev_t dev; 1561 { 1562 int c, s; 1563 1564 s = spltty(); /* XXX do we need this? */ 1565 1566 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1567 & SR1_RNE)) { 1568 #if defined(DDB) || defined(KGDB) 1569 #ifndef DDB_BREAK_CHAR 1570 u_int sr0; 1571 extern int db_active; 1572 1573 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1574 if (ISSET(sr0, SR0_RBB)) 1575 bus_space_write_4(sacomconstag, sacomconsioh, 1576 SACOM_SR0, SR0_RBB); 1577 if (ISSET(sr0, SR0_REB)) { 1578 bus_space_write_4(sacomconstag, sacomconsioh, 1579 SACOM_SR0, SR0_REB); 1580 if (db_active == 0) 1581 console_debugger(); 1582 } 1583 #endif 1584 #endif /* DDB || KGDB */ 1585 } 1586 1587 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1588 c &= 0xff; 1589 splx(s); 1590 1591 return (c); 1592 } 1593 1594 void 1595 sacomcnputc(dev, c) 1596 dev_t dev; 1597 int c; 1598 { 1599 int s; 1600 1601 s = spltty(); /* XXX do we need this? */ 1602 1603 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1604 & SR1_TNF)) 1605 ; 1606 1607 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1608 splx(s); 1609 } 1610 1611 void 1612 sacomcnpollc(dev, on) 1613 dev_t dev; 1614 int on; 1615 { 1616 1617 } 1618 1619 #ifdef DEBUG 1620 int 1621 sacomcncharpoll() 1622 { 1623 int c; 1624 1625 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1626 & SR1_RNE)) 1627 return -1; 1628 1629 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1630 c &= 0xff; 1631 1632 return (c); 1633 } 1634 1635 #endif 1636 1637 /* helper function to identify the com ports used by 1638 console or KGDB (and not yet autoconf attached) */ 1639 int 1640 sacom_is_console(iot, iobase, ioh) 1641 bus_space_tag_t iot; 1642 bus_addr_t iobase; 1643 bus_space_handle_t *ioh; 1644 { 1645 bus_space_handle_t help; 1646 1647 if (! sacomconsattached && 1648 iot == sacomconstag && iobase == sacomconsaddr) 1649 help = sacomconsioh; 1650 else 1651 return (0); 1652 1653 if (ioh) 1654 *ioh = help; 1655 return (1); 1656 } 1657
Indexes created Thu Oct 02 14:10:14 GMT 2025