sa11x0_com.c revision 1.1.4.2
1 /* $NetBSD: sa11x0_com.c,v 1.1.4.2 2001/10/13 17:42:34 fvdl 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(devvp, flag, mode, p) 484 struct vnode *devvp; 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 dev_t dev; 493 494 dev = vdev_rdev(devvp); 495 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 496 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 497 sc->sc_rbuf == NULL) 498 return (ENXIO); 499 500 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 501 return (ENXIO); 502 503 vdev_setprivdata(devvp, sc); 504 505 tp = sc->sc_tty; 506 507 if (ISSET(tp->t_state, TS_ISOPEN) && 508 ISSET(tp->t_state, TS_XCLUDE) && 509 p->p_ucred->cr_uid != 0) 510 return (EBUSY); 511 512 s = spltty(); 513 514 /* 515 * Do the following iff this is a first open. 516 */ 517 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 518 struct termios t; 519 520 tp->t_dev = dev; 521 522 s2 = splserial(); 523 COM_LOCK(sc); 524 525 if (sc->enable) { 526 if ((*sc->enable)(sc)) { 527 COM_UNLOCK(sc); 528 splx(s2); 529 splx(s); 530 printf("%s: device enable failed\n", 531 sc->sc_dev.dv_xname); 532 return (EIO); 533 } 534 sc->enabled = 1; 535 sacom_config(sc); 536 } 537 538 /* Turn on interrupts. */ 539 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 540 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 541 sc->sc_cr3); 542 543 544 COM_UNLOCK(sc); 545 splx(s2); 546 547 /* 548 * Initialize the termios status to the defaults. Add in the 549 * sticky bits from TIOCSFLAGS. 550 */ 551 t.c_ispeed = 0; 552 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 553 t.c_ospeed = sacomconsrate; 554 t.c_cflag = sacomconscflag; 555 } else { 556 t.c_ospeed = TTYDEF_SPEED; 557 t.c_cflag = TTYDEF_CFLAG; 558 } 559 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 560 SET(t.c_cflag, CLOCAL); 561 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 562 SET(t.c_cflag, CRTSCTS); 563 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 564 SET(t.c_cflag, MDMBUF); 565 /* Make sure sacomparam() will do something. */ 566 tp->t_ospeed = 0; 567 (void) sacomparam(tp, &t); 568 tp->t_iflag = TTYDEF_IFLAG; 569 tp->t_oflag = TTYDEF_OFLAG; 570 tp->t_lflag = TTYDEF_LFLAG; 571 ttychars(tp); 572 ttsetwater(tp); 573 574 s2 = splserial(); 575 COM_LOCK(sc); 576 577 /* 578 * Turn on DTR. We must always do this, even if carrier is not 579 * present, because otherwise we'd have to use TIOCSDTR 580 * immediately after setting CLOCAL, which applications do not 581 * expect. We always assert DTR while the device is open 582 * unless explicitly requested to deassert it. 583 */ 584 sacom_modem(sc, 1); 585 586 /* Clear the input ring, and unblock. */ 587 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 588 sc->sc_rbavail = SACOM_RING_SIZE; 589 sacom_iflush(sc); 590 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 591 sacom_hwiflow(sc); 592 593 #ifdef COM_DEBUG 594 if (sacom_debug) 595 comstatus(sc, "sacomopen "); 596 #endif 597 598 COM_UNLOCK(sc); 599 splx(s2); 600 } 601 602 splx(s); 603 604 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 605 if (error) 606 goto bad; 607 608 error = (*tp->t_linesw->l_open)(devvp, tp); 609 if (error) 610 goto bad; 611 612 return (0); 613 614 bad: 615 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 616 /* 617 * We failed to open the device, and nobody else had it opened. 618 * Clean up the state as appropriate. 619 */ 620 sacom_shutdown(sc); 621 } 622 623 return (error); 624 } 625 626 int 627 sacomclose(devvp, flag, mode, p) 628 struct vnode *devvp; 629 int flag, mode; 630 struct proc *p; 631 { 632 struct sacom_softc *sc; 633 struct tty *tp; 634 635 sc = vdev_privdata(devvp); 636 tp = sc->sc_tty; 637 638 /* XXX This is for cons.c. */ 639 if (!ISSET(tp->t_state, TS_ISOPEN)) 640 return (0); 641 642 (*tp->t_linesw->l_close)(tp, flag); 643 ttyclose(tp); 644 645 if (COM_ISALIVE(sc) == 0) 646 return (0); 647 648 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 649 /* 650 * Although we got a last close, the device may still be in 651 * use; e.g. if this was the dialout node, and there are still 652 * processes waiting for carrier on the non-dialout node. 653 */ 654 sacom_shutdown(sc); 655 } 656 657 return (0); 658 } 659 660 int 661 sacomread(devvp, uio, flag) 662 struct vnode *devvp; 663 struct uio *uio; 664 int flag; 665 { 666 struct sacom_softc *sc; 667 struct tty *tp; 668 669 sc = vdev_privdata(devvp); 670 tp = sc->sc_tty; 671 672 if (COM_ISALIVE(sc) == 0) 673 return (EIO); 674 675 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 676 } 677 678 int 679 sacomwrite(devvp, uio, flag) 680 struct vnode *devvp; 681 struct uio *uio; 682 int flag; 683 { 684 struct sacom_softc *sc; 685 struct tty *tp; 686 687 sc = vdev_privdata(devvp); 688 tp = sc->sc_tty; 689 690 if (COM_ISALIVE(sc) == 0) 691 return (EIO); 692 693 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 694 } 695 696 int 697 sacompoll(devvp, events, p) 698 struct vnode *devvp; 699 int events; 700 struct proc *p; 701 { 702 struct sacom_softc *sc; 703 struct tty *tp; 704 705 sc = vdev_privdata(devvp); 706 tp = sc->sc_tty; 707 708 if (COM_ISALIVE(sc) == 0) 709 return (EIO); 710 711 return ((*tp->t_linesw->l_poll)(tp, events, p)); 712 } 713 714 struct tty * 715 sacomtty(devvp) 716 struct vnode *devvp; 717 { 718 struct sacom_softc *sc; 719 struct tty *tp; 720 721 sc = vdev_privdata(devvp); 722 723 return sc->sc_tty; 724 } 725 726 int 727 sacomioctl(devvp, cmd, data, flag, p) 728 struct vnode *devvp; 729 u_long cmd; 730 caddr_t data; 731 int flag; 732 struct proc *p; 733 { 734 struct sacom_softc *sc; 735 struct tty *tp; 736 int error; 737 int s; 738 739 sc = vdev_privdata(devvp); 740 tp = sc->sc_tty; 741 742 if (COM_ISALIVE(sc) == 0) 743 return (EIO); 744 745 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 746 if (error >= 0) 747 return (error); 748 749 error = ttioctl(tp, devvp, cmd, data, flag, p); 750 if (error >= 0) 751 return (error); 752 753 error = 0; 754 755 s = splserial(); 756 COM_LOCK(sc); 757 758 switch (cmd) { 759 case TIOCSBRK: 760 sacom_break(sc, 1); 761 break; 762 763 case TIOCCBRK: 764 sacom_break(sc, 0); 765 break; 766 767 case TIOCSDTR: 768 sacom_modem(sc, 1); 769 break; 770 771 case TIOCCDTR: 772 sacom_modem(sc, 0); 773 break; 774 775 case TIOCGFLAGS: 776 *(int *)data = sc->sc_swflags; 777 break; 778 779 case TIOCSFLAGS: 780 error = suser(p->p_ucred, &p->p_acflag); 781 if (error) 782 break; 783 sc->sc_swflags = *(int *)data; 784 break; 785 786 case TIOCMSET: 787 case TIOCMBIS: 788 case TIOCMBIC: 789 tiocm_to_sacom(sc, cmd, *(int *)data); 790 break; 791 792 case TIOCMGET: 793 *(int *)data = sacom_to_tiocm(sc); 794 break; 795 796 default: 797 error = ENOTTY; 798 break; 799 } 800 801 COM_UNLOCK(sc); 802 splx(s); 803 804 #ifdef COM_DEBUG 805 if (sacom_debug) 806 comstatus(sc, "comioctl "); 807 #endif 808 809 return (error); 810 } 811 812 static inline void 813 sacom_schedrx(sc) 814 struct sacom_softc *sc; 815 { 816 817 sc->sc_rx_ready = 1; 818 819 /* Wake up the poller. */ 820 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 821 softintr_schedule(sc->sc_si); 822 #else 823 setsoftserial(); 824 #endif 825 } 826 827 void 828 sacom_break(sc, onoff) 829 struct sacom_softc *sc; 830 int onoff; 831 { 832 833 if (onoff) 834 SET(sc->sc_cr3, CR3_BRK); 835 else 836 CLR(sc->sc_cr3, CR3_BRK); 837 838 if (!sc->sc_heldchange) { 839 if (sc->sc_tx_busy) { 840 sc->sc_heldtbc = sc->sc_tbc; 841 sc->sc_tbc = 0; 842 sc->sc_heldchange = 1; 843 } else 844 sacom_loadchannelregs(sc); 845 } 846 } 847 848 void 849 sacom_modem(sc, onoff) 850 struct sacom_softc *sc; 851 int onoff; 852 { 853 if (!sc->sc_heldchange) { 854 if (sc->sc_tx_busy) { 855 sc->sc_heldtbc = sc->sc_tbc; 856 sc->sc_tbc = 0; 857 sc->sc_heldchange = 1; 858 } else 859 sacom_loadchannelregs(sc); 860 } 861 } 862 863 void 864 tiocm_to_sacom(sc, how, ttybits) 865 struct sacom_softc *sc; 866 u_long how; 867 int ttybits; 868 { 869 } 870 871 int 872 sacom_to_tiocm(sc) 873 struct sacom_softc *sc; 874 { 875 int ttybits = 0; 876 877 if (sc->sc_cr3 != 0) 878 SET(ttybits, TIOCM_LE); 879 880 return (ttybits); 881 } 882 883 static u_int 884 cflag2cr0(cflag) 885 tcflag_t cflag; 886 { 887 u_int cr0; 888 889 cr0 = (cflag & PARENB) ? CR0_PE : 0; 890 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 891 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 892 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 893 894 return (cr0); 895 } 896 897 int 898 sacomparam(tp, t) 899 struct tty *tp; 900 struct termios *t; 901 { 902 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 903 int ospeed = SACOMSPEED(t->c_ospeed); 904 u_int cr0; 905 int s; 906 907 if (sc == NULL || COM_ISALIVE(sc) == 0) 908 return (EIO); 909 910 /* Check requested parameters. */ 911 if (ospeed < 0) 912 return (EINVAL); 913 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 914 return (EINVAL); 915 916 /* 917 * For the console, always force CLOCAL and !HUPCL, so that the port 918 * is always active. 919 */ 920 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 921 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 922 SET(t->c_cflag, CLOCAL); 923 CLR(t->c_cflag, HUPCL); 924 } 925 926 /* 927 * If there were no changes, don't do anything. This avoids dropping 928 * input and improves performance when all we did was frob things like 929 * VMIN and VTIME. 930 */ 931 if (tp->t_ospeed == t->c_ospeed && 932 tp->t_cflag == t->c_cflag) 933 return (0); 934 935 cr0 = cflag2cr0(t->c_cflag); 936 937 s = splserial(); 938 COM_LOCK(sc); 939 940 sc->sc_cr0 = cr0; 941 942 sc->sc_speed = ospeed; 943 944 /* And copy to tty. */ 945 tp->t_ispeed = 0; 946 tp->t_ospeed = t->c_ospeed; 947 tp->t_cflag = t->c_cflag; 948 949 if (!sc->sc_heldchange) { 950 if (sc->sc_tx_busy) { 951 sc->sc_heldtbc = sc->sc_tbc; 952 sc->sc_tbc = 0; 953 sc->sc_heldchange = 1; 954 } else 955 sacom_loadchannelregs(sc); 956 } 957 958 if (!ISSET(t->c_cflag, CHWFLOW)) { 959 /* Disable the high water mark. */ 960 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 961 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 962 sacom_schedrx(sc); 963 } 964 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 965 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 966 sacom_hwiflow(sc); 967 } 968 } 969 970 COM_UNLOCK(sc); 971 splx(s); 972 973 (void) (*tp->t_linesw->l_modem)(tp, 1); 974 975 #ifdef COM_DEBUG 976 if (sacom_debug) 977 comstatus(sc, "comparam "); 978 #endif 979 980 return (0); 981 } 982 983 void 984 sacom_iflush(sc) 985 struct sacom_softc *sc; 986 { 987 bus_space_tag_t iot = sc->sc_iot; 988 bus_space_handle_t ioh = sc->sc_ioh; 989 #ifdef DIAGNOSTIC 990 int reg; 991 #endif 992 int timo; 993 994 #ifdef DIAGNOSTIC 995 reg = 0xffff; 996 #endif 997 timo = 50; 998 /* flush any pending I/O */ 999 if (sc->sc_cr3 & CR3_RXE) { 1000 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1001 && --timo) 1002 #ifdef DIAGNOSTIC 1003 reg = 1004 #else 1005 (void) 1006 #endif 1007 bus_space_read_4(iot, ioh, SACOM_DR); 1008 } 1009 #if 0 1010 /* XXX is it good idea to wait TX finish? */ 1011 if (sc->sc_cr3 & CR3_TXE) { 1012 timo = 500; 1013 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1014 && --timo) 1015 delay(100); 1016 } 1017 #endif 1018 #ifdef DIAGNOSTIC 1019 if (!timo) 1020 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1021 reg); 1022 #endif 1023 } 1024 1025 void 1026 sacom_loadchannelregs(sc) 1027 struct sacom_softc *sc; 1028 { 1029 bus_space_tag_t iot = sc->sc_iot; 1030 bus_space_handle_t ioh = sc->sc_ioh; 1031 1032 /* XXXXX necessary? */ 1033 sacom_iflush(sc); 1034 1035 /* Need to stop engines first. */ 1036 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1037 1038 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1039 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1040 1041 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1042 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1043 } 1044 1045 int 1046 sacomhwiflow(tp, block) 1047 struct tty *tp; 1048 int block; 1049 { 1050 #if 0 1051 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1052 int s; 1053 1054 if (sc == NULL || COM_ISALIVE(sc) == 0) 1055 return (0); 1056 1057 if (sc->sc_mcr_rts == 0) 1058 return (0); 1059 1060 s = splserial(); 1061 COM_LOCK(sc); 1062 1063 if (block) { 1064 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1065 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1066 sacom_hwiflow(sc); 1067 } 1068 } else { 1069 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1070 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1071 sacom_schedrx(sc); 1072 } 1073 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1074 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1075 sacom_hwiflow(sc); 1076 } 1077 } 1078 1079 COM_UNLOCK(sc); 1080 splx(s); 1081 #endif 1082 return (1); 1083 } 1084 1085 /* 1086 * (un)block input via hw flowcontrol 1087 */ 1088 void 1089 sacom_hwiflow(sc) 1090 struct sacom_softc *sc; 1091 { 1092 #if 0 1093 bus_space_tag_t iot = sc->sc_iot; 1094 bus_space_handle_t ioh = sc->sc_ioh; 1095 1096 /* XXX implement */ 1097 #endif 1098 } 1099 1100 1101 void 1102 sacomstart(tp) 1103 struct tty *tp; 1104 { 1105 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1106 bus_space_tag_t iot = sc->sc_iot; 1107 bus_space_handle_t ioh = sc->sc_ioh; 1108 int s; 1109 1110 if (sc == NULL || COM_ISALIVE(sc) == 0) 1111 return; 1112 1113 s = spltty(); 1114 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1115 goto out; 1116 1117 if (tp->t_outq.c_cc <= tp->t_lowat) { 1118 if (ISSET(tp->t_state, TS_ASLEEP)) { 1119 CLR(tp->t_state, TS_ASLEEP); 1120 wakeup(&tp->t_outq); 1121 } 1122 selwakeup(&tp->t_wsel); 1123 if (tp->t_outq.c_cc == 0) 1124 goto out; 1125 } 1126 1127 /* Grab the first contiguous region of buffer space. */ 1128 { 1129 u_char *tba; 1130 int tbc; 1131 1132 tba = tp->t_outq.c_cf; 1133 tbc = ndqb(&tp->t_outq, 0); 1134 1135 (void)splserial(); 1136 COM_LOCK(sc); 1137 1138 sc->sc_tba = tba; 1139 sc->sc_tbc = tbc; 1140 } 1141 1142 SET(tp->t_state, TS_BUSY); 1143 sc->sc_tx_busy = 1; 1144 1145 /* Enable transmit completion interrupts if necessary. */ 1146 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1147 SET(sc->sc_cr3, CR3_TIE); 1148 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1149 } 1150 1151 /* Output the first chunk of the contiguous buffer. */ 1152 sacom_filltx(sc); 1153 1154 COM_UNLOCK(sc); 1155 out: 1156 splx(s); 1157 return; 1158 } 1159 1160 void 1161 sacom_filltx(sc) 1162 struct sacom_softc *sc; 1163 { 1164 bus_space_tag_t iot = sc->sc_iot; 1165 bus_space_handle_t ioh = sc->sc_ioh; 1166 int c, n; 1167 1168 n = 0; 1169 while(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1170 & SR1_TNF) { 1171 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1172 break; 1173 c = *(sc->sc_tba + n); 1174 c &= 0xff; 1175 bus_space_write_4(iot, ioh, SACOM_DR, c); 1176 n++; 1177 } 1178 sc->sc_tbc -= n; 1179 sc->sc_tba += n; 1180 } 1181 1182 /* 1183 * Stop output on a line. 1184 */ 1185 void 1186 sacomstop(tp, flag) 1187 struct tty *tp; 1188 int flag; 1189 { 1190 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1191 int s; 1192 1193 s = splserial(); 1194 COM_LOCK(sc); 1195 if (ISSET(tp->t_state, TS_BUSY)) { 1196 /* Stop transmitting at the next chunk. */ 1197 sc->sc_tbc = 0; 1198 sc->sc_heldtbc = 0; 1199 if (!ISSET(tp->t_state, TS_TTSTOP)) 1200 SET(tp->t_state, TS_FLUSH); 1201 } 1202 COM_UNLOCK(sc); 1203 splx(s); 1204 } 1205 1206 static inline void 1207 sacom_rxsoft(sc, tp) 1208 struct sacom_softc *sc; 1209 struct tty *tp; 1210 { 1211 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1212 u_char *get, *end; 1213 u_int cc, scc; 1214 u_char sr1; 1215 int code; 1216 int s; 1217 1218 end = sc->sc_ebuf; 1219 get = sc->sc_rbget; 1220 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1221 1222 while (cc) { 1223 code = get[0]; 1224 sr1 = get[1]; 1225 if (ISSET(sr1, SR1_FRE)) 1226 SET(code, TTY_FE); 1227 if (ISSET(sr1, SR1_PRE)) 1228 SET(code, TTY_PE); 1229 if ((*rint)(code, tp) == -1) { 1230 /* 1231 * The line discipline's buffer is out of space. 1232 */ 1233 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1234 /* 1235 * We're either not using flow control, or the 1236 * line discipline didn't tell us to block for 1237 * some reason. Either way, we have no way to 1238 * know when there's more space available, so 1239 * just drop the rest of the data. 1240 */ 1241 get += cc << 1; 1242 if (get >= end) 1243 get -= SACOM_RING_SIZE << 1; 1244 cc = 0; 1245 } else { 1246 /* 1247 * Don't schedule any more receive processing 1248 * until the line discipline tells us there's 1249 * space available (through comhwiflow()). 1250 * Leave the rest of the data in the input 1251 * buffer. 1252 */ 1253 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1254 } 1255 break; 1256 } 1257 get += 2; 1258 if (get >= end) 1259 get = sc->sc_rbuf; 1260 cc--; 1261 } 1262 1263 if (cc != scc) { 1264 sc->sc_rbget = get; 1265 s = splserial(); 1266 COM_LOCK(sc); 1267 1268 cc = sc->sc_rbavail += scc - cc; 1269 /* Buffers should be ok again, release possible block. */ 1270 if (cc >= 1) { 1271 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1272 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1273 SET(sc->sc_cr3, CR3_RIE); 1274 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1275 SACOM_CR3, sc->sc_cr3); 1276 } 1277 } 1278 COM_UNLOCK(sc); 1279 splx(s); 1280 } 1281 } 1282 1283 static inline void 1284 sacom_txsoft(sc, tp) 1285 struct sacom_softc *sc; 1286 struct tty *tp; 1287 { 1288 1289 CLR(tp->t_state, TS_BUSY); 1290 if (ISSET(tp->t_state, TS_FLUSH)) 1291 CLR(tp->t_state, TS_FLUSH); 1292 else 1293 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1294 (*tp->t_linesw->l_start)(tp); 1295 } 1296 1297 static inline void 1298 sacom_stsoft(sc, tp) 1299 struct sacom_softc *sc; 1300 struct tty *tp; 1301 { 1302 } 1303 1304 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1305 void 1306 sacomsoft(arg) 1307 void *arg; 1308 { 1309 struct sacom_softc *sc = arg; 1310 struct tty *tp; 1311 1312 if (COM_ISALIVE(sc) == 0) 1313 return; 1314 1315 { 1316 #else 1317 void 1318 sacomsoft() 1319 { 1320 struct sacom_softc *sc; 1321 struct tty *tp; 1322 int unit; 1323 1324 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1325 sc = device_lookup(&sacom_cd, unit); 1326 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1327 continue; 1328 1329 if (COM_ISALIVE(sc) == 0) 1330 continue; 1331 1332 tp = sc->sc_tty; 1333 if (tp == NULL) 1334 continue; 1335 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1336 continue; 1337 #endif 1338 tp = sc->sc_tty; 1339 1340 if (sc->sc_rx_ready) { 1341 sc->sc_rx_ready = 0; 1342 sacom_rxsoft(sc, tp); 1343 } 1344 1345 if (sc->sc_st_check) { 1346 sc->sc_st_check = 0; 1347 sacom_stsoft(sc, tp); 1348 } 1349 1350 if (sc->sc_tx_done) { 1351 sc->sc_tx_done = 0; 1352 sacom_txsoft(sc, tp); 1353 } 1354 } 1355 1356 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1357 #endif 1358 } 1359 1360 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1361 /* there has got to be a better way to do comsoft() */ 1362 }} 1363 #endif 1364 1365 int 1366 sacomintr(arg) 1367 void *arg; 1368 { 1369 struct sacom_softc *sc = arg; 1370 bus_space_tag_t iot = sc->sc_iot; 1371 bus_space_handle_t ioh = sc->sc_ioh; 1372 u_char *put, *end; 1373 u_int cc; 1374 u_int sr0, sr1; 1375 1376 if (COM_ISALIVE(sc) == 0) 1377 return (0); 1378 1379 COM_LOCK(sc); 1380 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1381 if (! sr0) { 1382 COM_UNLOCK(sc); 1383 return (0); 1384 } 1385 if (ISSET(sr0, SR0_EIF)) 1386 /* XXX silently discard error bits */ 1387 bus_space_read_4(iot, ioh, SACOM_DR); 1388 if (ISSET(sr0, SR0_RBB)) 1389 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1390 if (ISSET(sr0, SR0_REB)) { 1391 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1392 #if defined(DDB) || defined(KGDB) 1393 #ifndef DDB_BREAK_CHAR 1394 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1395 console_debugger(); 1396 } 1397 #endif 1398 #endif /* DDB || KGDB */ 1399 } 1400 1401 1402 end = sc->sc_ebuf; 1403 put = sc->sc_rbput; 1404 cc = sc->sc_rbavail; 1405 1406 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1407 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1408 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1409 while (cc > 0) { 1410 if (!ISSET(sr1, SR1_RNE)) { 1411 bus_space_write_4(iot, ioh, SACOM_SR0, 1412 SR0_RID); 1413 break; 1414 } 1415 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1416 put[1] = sr1; 1417 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1418 if (put[0] == DDB_BREAK_CHAR && 1419 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1420 console_debugger(); 1421 1422 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1423 continue; 1424 } 1425 #endif 1426 put += 2; 1427 if (put >= end) 1428 put = sc->sc_rbuf; 1429 cc--; 1430 1431 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1432 } 1433 1434 /* 1435 * Current string of incoming characters ended because 1436 * no more data was available or we ran out of space. 1437 * Schedule a receive event if any data was received. 1438 * If we're out of space, turn off receive interrupts. 1439 */ 1440 sc->sc_rbput = put; 1441 sc->sc_rbavail = cc; 1442 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1443 sc->sc_rx_ready = 1; 1444 1445 /* XXX do RX hardware flow control */ 1446 1447 /* 1448 * If we're out of space, disable receive interrupts 1449 * until the queue has drained a bit. 1450 */ 1451 if (!cc) { 1452 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1453 CLR(sc->sc_cr3, CR3_RIE); 1454 bus_space_write_4(iot, ioh, SACOM_CR3, 1455 sc->sc_cr3); 1456 } 1457 } else { 1458 #ifdef DIAGNOSTIC 1459 panic("sacomintr: we shouldn't reach here\n"); 1460 #endif 1461 CLR(sc->sc_cr3, CR3_RIE); 1462 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1463 } 1464 } 1465 1466 /* 1467 * Done handling any receive interrupts. See if data can be 1468 * transmitted as well. Schedule tx done event if no data left 1469 * and tty was marked busy. 1470 */ 1471 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1472 if (ISSET(sr0, SR0_TFS)) { 1473 /* 1474 * If we've delayed a parameter change, do it now, and restart 1475 * output. 1476 * XXX sacom_loadchanelregs() waits TX completion, 1477 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1478 */ 1479 if (sc->sc_heldchange) { 1480 sacom_loadchannelregs(sc); 1481 sc->sc_heldchange = 0; 1482 sc->sc_tbc = sc->sc_heldtbc; 1483 sc->sc_heldtbc = 0; 1484 } 1485 1486 /* Output the next chunk of the contiguous buffer, if any. */ 1487 if (sc->sc_tbc > 0) { 1488 sacom_filltx(sc); 1489 } else { 1490 /* Disable transmit completion interrupts if necessary. */ 1491 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1492 CLR(sc->sc_cr3, CR3_TIE); 1493 bus_space_write_4(iot, ioh, SACOM_CR3, 1494 sc->sc_cr3); 1495 } 1496 if (sc->sc_tx_busy) { 1497 sc->sc_tx_busy = 0; 1498 sc->sc_tx_done = 1; 1499 } 1500 } 1501 } 1502 COM_UNLOCK(sc); 1503 1504 /* Wake up the poller. */ 1505 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1506 softintr_schedule(sc->sc_si); 1507 #else 1508 setsoftserial(); 1509 #endif 1510 1511 #if NRND > 0 && defined(RND_COM) 1512 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1513 #endif 1514 return (1); 1515 } 1516 1517 /* Initialization for serial console */ 1518 int 1519 sacominit(iot, iobase, baud, cflag, iohp) 1520 bus_space_tag_t iot; 1521 bus_addr_t iobase; 1522 int baud; 1523 tcflag_t cflag; 1524 bus_space_handle_t *iohp; 1525 { 1526 int brd, cr0; 1527 1528 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1529 printf("register map failed\n"); 1530 1531 /* wait for the Tx queue to drain and disable the UART */ 1532 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1533 ; 1534 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1535 1536 cr0 = cflag2cr0(cflag); 1537 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1538 1539 brd = SACOMSPEED(baud); 1540 sacomconsrate = baud; 1541 sacomconsaddr = iobase; 1542 sacomconscflag = cflag; 1543 /* XXX assumes little endian */ 1544 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1545 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1546 1547 /* enable the UART */ 1548 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1549 1550 return (0); 1551 } 1552 1553 void 1554 sacomcnprobe(cp) 1555 struct consdev *cp; 1556 { 1557 cp->cn_pri = CN_REMOTE; 1558 } 1559 1560 void 1561 sacomcninit(cp) 1562 struct consdev *cp; 1563 { 1564 if (cp == NULL) { 1565 /* XXX cp == NULL means that MMU is disabled. */ 1566 sacomconsioh = SACOM3_HW_BASE; 1567 sacomconstag = &sa11x0_bs_tag; 1568 cn_tab = &sacomcons; 1569 return; 1570 } 1571 1572 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1573 CONMODE, &sacomconsioh)) 1574 panic("can't init serial console @%x", CONADDR); 1575 cn_tab = &sacomcons; 1576 sacomconstag = &sa11x0_bs_tag; 1577 } 1578 1579 int 1580 sacomcngetc(dev) 1581 dev_t dev; 1582 { 1583 int c, s; 1584 1585 s = spltty(); /* XXX do we need this? */ 1586 1587 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1588 & SR1_RNE)) { 1589 #if defined(DDB) || defined(KGDB) 1590 #ifndef DDB_BREAK_CHAR 1591 u_int sr0; 1592 extern int db_active; 1593 1594 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1595 if (ISSET(sr0, SR0_RBB)) 1596 bus_space_write_4(sacomconstag, sacomconsioh, 1597 SACOM_SR0, SR0_RBB); 1598 if (ISSET(sr0, SR0_REB)) { 1599 bus_space_write_4(sacomconstag, sacomconsioh, 1600 SACOM_SR0, SR0_REB); 1601 if (db_active == 0) 1602 console_debugger(); 1603 } 1604 #endif 1605 #endif /* DDB || KGDB */ 1606 } 1607 1608 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1609 c &= 0xff; 1610 splx(s); 1611 1612 return (c); 1613 } 1614 1615 void 1616 sacomcnputc(dev, c) 1617 dev_t dev; 1618 int c; 1619 { 1620 int s; 1621 1622 s = spltty(); /* XXX do we need this? */ 1623 1624 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1625 & SR1_TNF)) 1626 ; 1627 1628 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1629 splx(s); 1630 } 1631 1632 void 1633 sacomcnpollc(dev, on) 1634 dev_t dev; 1635 int on; 1636 { 1637 1638 } 1639 1640 #ifdef DEBUG 1641 int 1642 sacomcncharpoll() 1643 { 1644 int c; 1645 1646 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1647 & SR1_RNE)) 1648 return -1; 1649 1650 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1651 c &= 0xff; 1652 1653 return (c); 1654 } 1655 1656 #endif 1657 1658 /* helper function to identify the com ports used by 1659 console or KGDB (and not yet autoconf attached) */ 1660 int 1661 sacom_is_console(iot, iobase, ioh) 1662 bus_space_tag_t iot; 1663 bus_addr_t iobase; 1664 bus_space_handle_t *ioh; 1665 { 1666 bus_space_handle_t help; 1667 1668 if (! sacomconsattached && 1669 iot == sacomconstag && iobase == sacomconsaddr) 1670 help = sacomconsioh; 1671 else 1672 return (0); 1673 1674 if (ioh) 1675 *ioh = help; 1676 return (1); 1677 } 1678
Indexes created Wed Oct 29 20:09:47 GMT 2025