sa11x0_com.c revision 1.27
1 /* $NetBSD: sa11x0_com.c,v 1.27 2006/03/04 13:54:08 peter 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. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)com.c 7.5 (Berkeley) 5/16/91 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.27 2006/03/04 13:54:08 peter Exp $"); 75 76 #include "opt_com.h" 77 #include "opt_ddb.h" 78 #include "opt_ddbparam.h" 79 #include "opt_kgdb.h" 80 #include "opt_multiprocessor.h" 81 #include "opt_lockdebug.h" 82 83 #include "rnd.h" 84 #if NRND > 0 && defined(RND_COM) 85 #include <sys/rnd.h> 86 #endif 87 88 #include <sys/param.h> 89 #include <sys/systm.h> 90 #include <sys/types.h> 91 #include <sys/conf.h> 92 #include <sys/file.h> 93 #include <sys/device.h> 94 #include <sys/kernel.h> 95 #include <sys/malloc.h> 96 #include <sys/tty.h> 97 #include <sys/uio.h> 98 #include <sys/vnode.h> 99 100 #include <dev/cons.h> 101 102 #include <machine/bus.h> 103 #include <arm/sa11x0/sa11x0_reg.h> 104 #include <arm/sa11x0/sa11x0_var.h> 105 #include <arm/sa11x0/sa11x0_comreg.h> 106 #include <arm/sa11x0/sa11x0_comvar.h> 107 #include <arm/sa11x0/sa11x0_gpioreg.h> 108 109 #ifdef hpcarm 110 #include <hpc/include/platid.h> 111 #include <hpc/include/platid_mask.h> 112 #endif 113 114 #include "sacom.h" 115 116 dev_type_open(sacomopen); 117 dev_type_close(sacomclose); 118 dev_type_read(sacomread); 119 dev_type_write(sacomwrite); 120 dev_type_ioctl(sacomioctl); 121 dev_type_stop(sacomstop); 122 dev_type_tty(sacomtty); 123 dev_type_poll(sacompoll); 124 125 const struct cdevsw sacom_cdevsw = { 126 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 127 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 128 }; 129 130 static int sacom_match(struct device *, struct cfdata *, void *); 131 static void sacom_attach(struct device *, struct device *, void *); 132 static void sacom_filltx(struct sacom_softc *); 133 static void sacom_attach_subr(struct sacom_softc *); 134 #if defined(DDB) || defined(KGDB) 135 static void sacom_enable_debugport(struct sacom_softc *); 136 #endif 137 int sacom_detach(struct device *, int); 138 void sacom_config(struct sacom_softc *); 139 int sacom_activate(struct device *, enum devact); 140 void sacom_shutdown(struct sacom_softc *); 141 static u_int cflag2cr0(tcflag_t); 142 int sacomparam(struct tty *, struct termios *); 143 void sacomstart(struct tty *); 144 int sacomhwiflow(struct tty *, int); 145 146 void sacom_loadchannelregs(struct sacom_softc *); 147 void sacom_hwiflow(struct sacom_softc *); 148 void sacom_break(struct sacom_softc *, int); 149 void sacom_modem(struct sacom_softc *, int); 150 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 151 int sacom_to_tiocm(struct sacom_softc *); 152 void sacom_iflush(struct sacom_softc *); 153 154 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 155 bus_space_handle_t *); 156 int sacom_is_console(bus_space_tag_t, bus_addr_t, 157 bus_space_handle_t *); 158 159 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 160 void sacomsoft(void *); 161 #else 162 void sacomsoft(void); 163 #endif 164 165 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 166 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 167 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 168 static inline void sacom_schedrx(struct sacom_softc *); 169 170 #ifdef hpcarm 171 /* HPCARM specific functions */ 172 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 173 #endif 174 175 #define COMUNIT_MASK 0x7ffff 176 #define COMDIALOUT_MASK 0x80000 177 178 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 179 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 180 181 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 182 device_is_active(&(sc)->sc_dev)) 183 184 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 185 #define COM_LOCK(sc) 186 #define COM_UNLOCK(sc) 187 188 #define SET(t, f) (t) |= (f) 189 #define CLR(t, f) (t) &= ~(f) 190 #define ISSET(t, f) ((t) & (f)) 191 192 int sacomintr(void *); 193 int sacomcngetc(dev_t); 194 void sacomcnputc(dev_t, int); 195 void sacomcnpollc(dev_t, int); 196 197 void sacomcnprobe(struct consdev *); 198 void sacomcninit(struct consdev *); 199 200 extern struct bus_space sa11x0_bs_tag; 201 202 static bus_space_tag_t sacomconstag; 203 static bus_space_handle_t sacomconsioh; 204 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 205 206 static int sacomconsattached; 207 static int sacomconsrate; 208 static tcflag_t sacomconscflag; 209 210 CFATTACH_DECL(sacom, sizeof(struct sacom_softc), 211 sacom_match, sacom_attach, NULL, NULL); 212 extern struct cfdriver sacom_cd; 213 214 #ifdef hpcarm 215 struct platid_data sacom_platid_table[] = { 216 { &platid_mask_MACH_HP_JORNADA_7XX, sacom_j720_init }, 217 { NULL, NULL } 218 }; 219 #endif 220 221 struct consdev sacomcons = { 222 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 223 NULL, NULL, NODEV, CN_NORMAL 224 }; 225 226 #ifndef CONMODE 227 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 228 #endif 229 #ifndef CONSPEED 230 #define CONSPEED 9600 231 #endif 232 #ifndef CONADDR 233 #define CONADDR SACOM3_BASE 234 #endif 235 236 static int 237 sacom_match(parent, match, aux) 238 struct device *parent; 239 struct cfdata *match; 240 void *aux; 241 { 242 return (1); 243 } 244 245 void 246 sacom_attach(parent, self, aux) 247 struct device *parent; 248 struct device *self; 249 void *aux; 250 { 251 struct sacom_softc *sc = (struct sacom_softc*)self; 252 struct sa11x0_attach_args *sa = aux; 253 254 #ifdef hpcarm 255 struct platid_data *p; 256 void (*mdinit)(struct device *, struct sacom_softc *); 257 #endif 258 259 printf("\n"); 260 261 sc->sc_iot = sa->sa_iot; 262 sc->sc_baseaddr = sa->sa_addr; 263 264 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 265 &sc->sc_ioh)) { 266 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 267 return; 268 } 269 270 printf("%s: ", sc->sc_dev.dv_xname); 271 switch(sc->sc_baseaddr) { 272 case 0x80050000: 273 printf("SA11x0 UART3\n"); 274 break; 275 case 0x80010000: 276 printf("SA11x0 UART1\n"); 277 break; 278 case 0x80030000: 279 printf("SA11x0 UART2 (IRDA)\n"); 280 break; 281 default: 282 printf("unknown SA11x0 UART\n"); 283 break; 284 } 285 286 sacom_attach_subr(sc); 287 288 #ifdef hpcarm 289 /* Do hpcarm specific initialization, if any */ 290 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 291 mdinit = p->data; 292 (mdinit)(parent, sc); 293 } 294 #endif 295 296 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 297 } 298 299 void 300 sacom_attach_subr(sc) 301 struct sacom_softc *sc; 302 { 303 bus_addr_t iobase = sc->sc_baseaddr; 304 bus_space_tag_t iot = sc->sc_iot; 305 struct tty *tp; 306 307 /* XXX Do we need to disable interrupts here? */ 308 309 if (iot == sacomconstag && iobase == sacomconsaddr) { 310 sacomconsattached = 1; 311 sc->sc_speed = SACOMSPEED(sacomconsrate); 312 313 /* Make sure the console is always "hardwired". */ 314 delay(10000); /* wait for output to finish */ 315 SET(sc->sc_hwflags, COM_HW_CONSOLE); 316 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 317 } 318 319 tp = ttymalloc(); 320 tp->t_oproc = sacomstart; 321 tp->t_param = sacomparam; 322 tp->t_hwiflow = sacomhwiflow; 323 324 sc->sc_tty = tp; 325 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 326 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 327 sc->sc_rbavail = SACOM_RING_SIZE; 328 if (sc->sc_rbuf == NULL) { 329 printf("%s: unable to allocate ring buffer\n", 330 sc->sc_dev.dv_xname); 331 return; 332 } 333 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 334 sc->sc_tbc = 0; 335 336 tty_attach(tp); 337 338 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 339 int maj; 340 341 /* locate the major number */ 342 maj = cdevsw_lookup_major(&sacom_cdevsw); 343 344 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 345 346 delay(10000); /* XXX */ 347 printf("%s: console\n", sc->sc_dev.dv_xname); 348 delay(10000); /* XXX */ 349 } 350 351 352 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 353 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 354 #endif 355 356 #if NRND > 0 && defined(RND_COM) 357 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 358 RND_TYPE_TTY, 0); 359 #endif 360 361 /* if there are no enable/disable functions, assume the device 362 is always enabled */ 363 if (!sc->enable) 364 sc->enabled = 1; 365 366 sacom_config(sc); 367 368 SET(sc->sc_hwflags, COM_HW_DEV_OK); 369 } 370 371 /* This is necessary when dynamically changing SAIP configuration. */ 372 int 373 sacom_detach(self, flags) 374 struct device *self; 375 int flags; 376 { 377 struct sacom_softc *sc = (struct sacom_softc *)self; 378 int maj, mn; 379 380 /* locate the major number */ 381 maj = cdevsw_lookup_major(&sacom_cdevsw); 382 383 /* Nuke the vnodes for any open instances. */ 384 mn = self->dv_unit; 385 vdevgone(maj, mn, mn, VCHR); 386 387 mn |= COMDIALOUT_MASK; 388 vdevgone(maj, mn, mn, VCHR); 389 390 /* Free the receive buffer. */ 391 free(sc->sc_rbuf, M_DEVBUF); 392 393 /* Detach and free the tty. */ 394 tty_detach(sc->sc_tty); 395 ttyfree(sc->sc_tty); 396 397 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 398 /* Unhook the soft interrupt handler. */ 399 softintr_disestablish(sc->sc_si); 400 #endif 401 402 #if NRND > 0 && defined(RND_COM) 403 /* Unhook the entropy source. */ 404 rnd_detach_source(&sc->rnd_source); 405 #endif 406 407 return (0); 408 } 409 410 void 411 sacom_config(sc) 412 struct sacom_softc *sc; 413 { 414 bus_space_tag_t iot = sc->sc_iot; 415 bus_space_handle_t ioh = sc->sc_ioh; 416 417 /* Disable engine before configuring the device. */ 418 sc->sc_cr3 = 0; 419 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 420 421 #ifdef DDB 422 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 423 sacom_enable_debugport(sc); 424 #endif 425 } 426 427 #ifdef DDB 428 static void 429 sacom_enable_debugport(sc) 430 struct sacom_softc *sc; 431 { 432 bus_space_tag_t iot = sc->sc_iot; 433 bus_space_handle_t ioh = sc->sc_ioh; 434 int s; 435 436 s = splserial(); 437 COM_LOCK(sc); 438 sc->sc_cr3 = CR3_RXE | CR3_TXE; 439 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 440 COM_UNLOCK(sc); 441 splx(s); 442 } 443 #endif 444 445 int 446 sacom_activate(self, act) 447 struct device *self; 448 enum devact act; 449 { 450 struct sacom_softc *sc = (struct sacom_softc *)self; 451 int s, rv = 0; 452 453 s = splserial(); 454 COM_LOCK(sc); 455 switch (act) { 456 case DVACT_ACTIVATE: 457 rv = EOPNOTSUPP; 458 break; 459 460 case DVACT_DEACTIVATE: 461 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 462 rv = EBUSY; 463 break; 464 } 465 466 if (sc->disable != NULL && sc->enabled != 0) { 467 (*sc->disable)(sc); 468 sc->enabled = 0; 469 } 470 break; 471 } 472 473 COM_UNLOCK(sc); 474 splx(s); 475 return (rv); 476 } 477 478 void 479 sacom_shutdown(sc) 480 struct sacom_softc *sc; 481 { 482 struct tty *tp = sc->sc_tty; 483 int s; 484 485 s = splserial(); 486 COM_LOCK(sc); 487 488 /* Clear any break condition set with TIOCSBRK. */ 489 sacom_break(sc, 0); 490 491 /* 492 * Hang up if necessary. Wait a bit, so the other side has time to 493 * notice even if we immediately open the port again. 494 * Avoid tsleeping above splhigh(). 495 */ 496 if (ISSET(tp->t_cflag, HUPCL)) { 497 sacom_modem(sc, 0); 498 COM_UNLOCK(sc); 499 splx(s); 500 /* XXX tsleep will only timeout */ 501 (void) tsleep(sc, TTIPRI, ttclos, hz); 502 s = splserial(); 503 COM_LOCK(sc); 504 } 505 506 /* Turn off interrupts. */ 507 sc->sc_cr3 = 0; 508 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 509 510 if (sc->disable) { 511 #ifdef DIAGNOSTIC 512 if (!sc->enabled) 513 panic("sacom_shutdown: not enabled?"); 514 #endif 515 (*sc->disable)(sc); 516 sc->enabled = 0; 517 } 518 COM_UNLOCK(sc); 519 splx(s); 520 } 521 522 int 523 sacomopen(dev, flag, mode, l) 524 dev_t dev; 525 int flag, mode; 526 struct lwp *l; 527 { 528 struct sacom_softc *sc; 529 struct tty *tp; 530 int s, s2; 531 int error; 532 533 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 534 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 535 sc->sc_rbuf == NULL) 536 return (ENXIO); 537 538 if (!device_is_active(&sc->sc_dev)) 539 return (ENXIO); 540 541 tp = sc->sc_tty; 542 543 if (ISSET(tp->t_state, TS_ISOPEN) && 544 ISSET(tp->t_state, TS_XCLUDE) && 545 suser(l->l_proc->p_ucred, &l->l_proc->p_acflag) != 0) 546 return (EBUSY); 547 548 s = spltty(); 549 550 /* 551 * Do the following iff this is a first open. 552 */ 553 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 554 struct termios t; 555 556 tp->t_dev = dev; 557 558 s2 = splserial(); 559 COM_LOCK(sc); 560 561 if (sc->enable) { 562 if ((*sc->enable)(sc)) { 563 COM_UNLOCK(sc); 564 splx(s2); 565 splx(s); 566 printf("%s: device enable failed\n", 567 sc->sc_dev.dv_xname); 568 return (EIO); 569 } 570 sc->enabled = 1; 571 sacom_config(sc); 572 } 573 574 /* Turn on interrupts. */ 575 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 576 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 577 sc->sc_cr3); 578 579 580 COM_UNLOCK(sc); 581 splx(s2); 582 583 /* 584 * Initialize the termios status to the defaults. Add in the 585 * sticky bits from TIOCSFLAGS. 586 */ 587 t.c_ispeed = 0; 588 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 589 t.c_ospeed = sacomconsrate; 590 t.c_cflag = sacomconscflag; 591 } else { 592 t.c_ospeed = TTYDEF_SPEED; 593 t.c_cflag = TTYDEF_CFLAG; 594 } 595 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 596 SET(t.c_cflag, CLOCAL); 597 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 598 SET(t.c_cflag, CRTSCTS); 599 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 600 SET(t.c_cflag, MDMBUF); 601 /* Make sure sacomparam() will do something. */ 602 tp->t_ospeed = 0; 603 (void) sacomparam(tp, &t); 604 tp->t_iflag = TTYDEF_IFLAG; 605 tp->t_oflag = TTYDEF_OFLAG; 606 tp->t_lflag = TTYDEF_LFLAG; 607 ttychars(tp); 608 ttsetwater(tp); 609 610 s2 = splserial(); 611 COM_LOCK(sc); 612 613 /* 614 * Turn on DTR. We must always do this, even if carrier is not 615 * present, because otherwise we'd have to use TIOCSDTR 616 * immediately after setting CLOCAL, which applications do not 617 * expect. We always assert DTR while the device is open 618 * unless explicitly requested to deassert it. 619 */ 620 sacom_modem(sc, 1); 621 622 /* Clear the input ring, and unblock. */ 623 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 624 sc->sc_rbavail = SACOM_RING_SIZE; 625 sacom_iflush(sc); 626 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 627 sacom_hwiflow(sc); 628 629 #ifdef COM_DEBUG 630 if (sacom_debug) 631 comstatus(sc, "sacomopen "); 632 #endif 633 634 COM_UNLOCK(sc); 635 splx(s2); 636 } 637 638 splx(s); 639 640 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 641 if (error) 642 goto bad; 643 644 error = (*tp->t_linesw->l_open)(dev, tp); 645 if (error) 646 goto bad; 647 648 return (0); 649 650 bad: 651 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 652 /* 653 * We failed to open the device, and nobody else had it opened. 654 * Clean up the state as appropriate. 655 */ 656 sacom_shutdown(sc); 657 } 658 659 return (error); 660 } 661 662 int 663 sacomclose(dev, flag, mode, l) 664 dev_t dev; 665 int flag, mode; 666 struct lwp *l; 667 { 668 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 669 struct tty *tp = sc->sc_tty; 670 671 /* XXX This is for cons.c. */ 672 if (!ISSET(tp->t_state, TS_ISOPEN)) 673 return (0); 674 675 (*tp->t_linesw->l_close)(tp, flag); 676 ttyclose(tp); 677 678 if (COM_ISALIVE(sc) == 0) 679 return (0); 680 681 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 682 /* 683 * Although we got a last close, the device may still be in 684 * use; e.g. if this was the dialout node, and there are still 685 * processes waiting for carrier on the non-dialout node. 686 */ 687 sacom_shutdown(sc); 688 } 689 690 return (0); 691 } 692 693 int 694 sacomread(dev, uio, flag) 695 dev_t dev; 696 struct uio *uio; 697 int flag; 698 { 699 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 700 struct tty *tp = sc->sc_tty; 701 702 if (COM_ISALIVE(sc) == 0) 703 return (EIO); 704 705 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 706 } 707 708 int 709 sacomwrite(dev, uio, flag) 710 dev_t dev; 711 struct uio *uio; 712 int flag; 713 { 714 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 715 struct tty *tp = sc->sc_tty; 716 717 if (COM_ISALIVE(sc) == 0) 718 return (EIO); 719 720 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 721 } 722 723 int 724 sacompoll(dev, events, l) 725 dev_t dev; 726 int events; 727 struct lwp *l; 728 { 729 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 730 struct tty *tp = sc->sc_tty; 731 732 if (COM_ISALIVE(sc) == 0) 733 return (EIO); 734 735 return ((*tp->t_linesw->l_poll)(tp, events, l)); 736 } 737 738 struct tty * 739 sacomtty(dev) 740 dev_t dev; 741 { 742 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 743 struct tty *tp = sc->sc_tty; 744 745 return (tp); 746 } 747 748 int 749 sacomioctl(dev, cmd, data, flag, l) 750 dev_t dev; 751 u_long cmd; 752 caddr_t data; 753 int flag; 754 struct lwp *l; 755 { 756 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 757 struct tty *tp = sc->sc_tty; 758 int error; 759 int s; 760 761 if (COM_ISALIVE(sc) == 0) 762 return (EIO); 763 764 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 765 if (error != EPASSTHROUGH) 766 return (error); 767 768 error = ttioctl(tp, cmd, data, flag, l); 769 if (error != EPASSTHROUGH) 770 return (error); 771 772 error = 0; 773 774 s = splserial(); 775 COM_LOCK(sc); 776 777 switch (cmd) { 778 case TIOCSBRK: 779 sacom_break(sc, 1); 780 break; 781 782 case TIOCCBRK: 783 sacom_break(sc, 0); 784 break; 785 786 case TIOCSDTR: 787 sacom_modem(sc, 1); 788 break; 789 790 case TIOCCDTR: 791 sacom_modem(sc, 0); 792 break; 793 794 case TIOCGFLAGS: 795 *(int *)data = sc->sc_swflags; 796 break; 797 798 case TIOCSFLAGS: 799 error = suser(l->l_proc->p_ucred, &l->l_proc->p_acflag); 800 if (error) 801 break; 802 sc->sc_swflags = *(int *)data; 803 break; 804 805 case TIOCMSET: 806 case TIOCMBIS: 807 case TIOCMBIC: 808 tiocm_to_sacom(sc, cmd, *(int *)data); 809 break; 810 811 case TIOCMGET: 812 *(int *)data = sacom_to_tiocm(sc); 813 break; 814 815 default: 816 error = EPASSTHROUGH; 817 break; 818 } 819 820 COM_UNLOCK(sc); 821 splx(s); 822 823 #ifdef COM_DEBUG 824 if (sacom_debug) 825 comstatus(sc, "comioctl "); 826 #endif 827 828 return (error); 829 } 830 831 static inline void 832 sacom_schedrx(sc) 833 struct sacom_softc *sc; 834 { 835 836 sc->sc_rx_ready = 1; 837 838 /* Wake up the poller. */ 839 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 840 softintr_schedule(sc->sc_si); 841 #else 842 setsoftserial(); 843 #endif 844 } 845 846 void 847 sacom_break(sc, onoff) 848 struct sacom_softc *sc; 849 int onoff; 850 { 851 852 if (onoff) 853 SET(sc->sc_cr3, CR3_BRK); 854 else 855 CLR(sc->sc_cr3, CR3_BRK); 856 857 if (!sc->sc_heldchange) { 858 if (sc->sc_tx_busy) { 859 sc->sc_heldtbc = sc->sc_tbc; 860 sc->sc_tbc = 0; 861 sc->sc_heldchange = 1; 862 } else 863 sacom_loadchannelregs(sc); 864 } 865 } 866 867 void 868 sacom_modem(sc, onoff) 869 struct sacom_softc *sc; 870 int onoff; 871 { 872 if (!sc->sc_heldchange) { 873 if (sc->sc_tx_busy) { 874 sc->sc_heldtbc = sc->sc_tbc; 875 sc->sc_tbc = 0; 876 sc->sc_heldchange = 1; 877 } else 878 sacom_loadchannelregs(sc); 879 } 880 } 881 882 void 883 tiocm_to_sacom(sc, how, ttybits) 884 struct sacom_softc *sc; 885 u_long how; 886 int ttybits; 887 { 888 } 889 890 int 891 sacom_to_tiocm(sc) 892 struct sacom_softc *sc; 893 { 894 int ttybits = 0; 895 896 if (sc->sc_cr3 != 0) 897 SET(ttybits, TIOCM_LE); 898 899 return (ttybits); 900 } 901 902 static u_int 903 cflag2cr0(cflag) 904 tcflag_t cflag; 905 { 906 u_int cr0; 907 908 cr0 = (cflag & PARENB) ? CR0_PE : 0; 909 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 910 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 911 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 912 913 return (cr0); 914 } 915 916 int 917 sacomparam(tp, t) 918 struct tty *tp; 919 struct termios *t; 920 { 921 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 922 int ospeed = SACOMSPEED(t->c_ospeed); 923 u_int cr0; 924 int s; 925 926 if (COM_ISALIVE(sc) == 0) 927 return (EIO); 928 929 /* Check requested parameters. */ 930 if (ospeed < 0) 931 return (EINVAL); 932 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 933 return (EINVAL); 934 935 /* 936 * For the console, always force CLOCAL and !HUPCL, so that the port 937 * is always active. 938 */ 939 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 940 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 941 SET(t->c_cflag, CLOCAL); 942 CLR(t->c_cflag, HUPCL); 943 } 944 945 /* 946 * If there were no changes, don't do anything. This avoids dropping 947 * input and improves performance when all we did was frob things like 948 * VMIN and VTIME. 949 */ 950 if (tp->t_ospeed == t->c_ospeed && 951 tp->t_cflag == t->c_cflag) 952 return (0); 953 954 cr0 = cflag2cr0(t->c_cflag); 955 956 s = splserial(); 957 COM_LOCK(sc); 958 959 sc->sc_cr0 = cr0; 960 961 sc->sc_speed = ospeed; 962 963 /* And copy to tty. */ 964 tp->t_ispeed = 0; 965 tp->t_ospeed = t->c_ospeed; 966 tp->t_cflag = t->c_cflag; 967 968 if (!sc->sc_heldchange) { 969 if (sc->sc_tx_busy) { 970 sc->sc_heldtbc = sc->sc_tbc; 971 sc->sc_tbc = 0; 972 sc->sc_heldchange = 1; 973 } else 974 sacom_loadchannelregs(sc); 975 } 976 977 if (!ISSET(t->c_cflag, CHWFLOW)) { 978 /* Disable the high water mark. */ 979 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 980 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 981 sacom_schedrx(sc); 982 } 983 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 984 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 985 sacom_hwiflow(sc); 986 } 987 } 988 989 COM_UNLOCK(sc); 990 splx(s); 991 992 (void) (*tp->t_linesw->l_modem)(tp, 1); 993 994 #ifdef COM_DEBUG 995 if (sacom_debug) 996 comstatus(sc, "comparam "); 997 #endif 998 999 return (0); 1000 } 1001 1002 void 1003 sacom_iflush(sc) 1004 struct sacom_softc *sc; 1005 { 1006 bus_space_tag_t iot = sc->sc_iot; 1007 bus_space_handle_t ioh = sc->sc_ioh; 1008 #ifdef DIAGNOSTIC 1009 int reg; 1010 #endif 1011 int timo; 1012 1013 #ifdef DIAGNOSTIC 1014 reg = 0xffff; 1015 #endif 1016 timo = 50; 1017 /* flush any pending I/O */ 1018 if (sc->sc_cr3 & CR3_RXE) { 1019 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1020 && --timo) 1021 #ifdef DIAGNOSTIC 1022 reg = 1023 #else 1024 (void) 1025 #endif 1026 bus_space_read_4(iot, ioh, SACOM_DR); 1027 } 1028 #if 0 1029 /* XXX is it good idea to wait TX finish? */ 1030 if (sc->sc_cr3 & CR3_TXE) { 1031 timo = 500; 1032 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1033 && --timo) 1034 delay(100); 1035 } 1036 #endif 1037 #ifdef DIAGNOSTIC 1038 if (!timo) 1039 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1040 reg); 1041 #endif 1042 } 1043 1044 void 1045 sacom_loadchannelregs(sc) 1046 struct sacom_softc *sc; 1047 { 1048 bus_space_tag_t iot = sc->sc_iot; 1049 bus_space_handle_t ioh = sc->sc_ioh; 1050 1051 /* XXXXX necessary? */ 1052 sacom_iflush(sc); 1053 1054 /* Need to stop engines first. */ 1055 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1056 1057 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1058 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1059 1060 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1061 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1062 } 1063 1064 int 1065 sacomhwiflow(tp, block) 1066 struct tty *tp; 1067 int block; 1068 { 1069 #if 0 1070 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1071 int s; 1072 1073 if (COM_ISALIVE(sc) == 0) 1074 return (0); 1075 1076 if (sc->sc_mcr_rts == 0) 1077 return (0); 1078 1079 s = splserial(); 1080 COM_LOCK(sc); 1081 1082 if (block) { 1083 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1084 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1085 sacom_hwiflow(sc); 1086 } 1087 } else { 1088 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1089 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1090 sacom_schedrx(sc); 1091 } 1092 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1093 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1094 sacom_hwiflow(sc); 1095 } 1096 } 1097 1098 COM_UNLOCK(sc); 1099 splx(s); 1100 #endif 1101 return (1); 1102 } 1103 1104 /* 1105 * (un)block input via hw flowcontrol 1106 */ 1107 void 1108 sacom_hwiflow(sc) 1109 struct sacom_softc *sc; 1110 { 1111 #if 0 1112 bus_space_tag_t iot = sc->sc_iot; 1113 bus_space_handle_t ioh = sc->sc_ioh; 1114 1115 /* XXX implement */ 1116 #endif 1117 } 1118 1119 1120 void 1121 sacomstart(tp) 1122 struct tty *tp; 1123 { 1124 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1125 bus_space_tag_t iot = sc->sc_iot; 1126 bus_space_handle_t ioh = sc->sc_ioh; 1127 int s; 1128 1129 if (COM_ISALIVE(sc) == 0) 1130 return; 1131 1132 s = spltty(); 1133 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1134 goto out; 1135 1136 if (tp->t_outq.c_cc <= tp->t_lowat) { 1137 if (ISSET(tp->t_state, TS_ASLEEP)) { 1138 CLR(tp->t_state, TS_ASLEEP); 1139 wakeup(&tp->t_outq); 1140 } 1141 selwakeup(&tp->t_wsel); 1142 if (tp->t_outq.c_cc == 0) 1143 goto out; 1144 } 1145 1146 /* Grab the first contiguous region of buffer space. */ 1147 { 1148 u_char *tba; 1149 int tbc; 1150 1151 tba = tp->t_outq.c_cf; 1152 tbc = ndqb(&tp->t_outq, 0); 1153 1154 (void)splserial(); 1155 COM_LOCK(sc); 1156 1157 sc->sc_tba = tba; 1158 sc->sc_tbc = tbc; 1159 } 1160 1161 SET(tp->t_state, TS_BUSY); 1162 sc->sc_tx_busy = 1; 1163 1164 /* Enable transmit completion interrupts if necessary. */ 1165 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1166 SET(sc->sc_cr3, CR3_TIE); 1167 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1168 } 1169 1170 /* Output the first chunk of the contiguous buffer. */ 1171 sacom_filltx(sc); 1172 1173 COM_UNLOCK(sc); 1174 out: 1175 splx(s); 1176 return; 1177 } 1178 1179 void 1180 sacom_filltx(sc) 1181 struct sacom_softc *sc; 1182 { 1183 bus_space_tag_t iot = sc->sc_iot; 1184 bus_space_handle_t ioh = sc->sc_ioh; 1185 int c, n; 1186 1187 n = 0; 1188 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1189 & SR1_TNF) { 1190 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1191 break; 1192 c = *(sc->sc_tba + n); 1193 c &= 0xff; 1194 bus_space_write_4(iot, ioh, SACOM_DR, c); 1195 n++; 1196 } 1197 sc->sc_tbc -= n; 1198 sc->sc_tba += n; 1199 } 1200 1201 /* 1202 * Stop output on a line. 1203 */ 1204 void 1205 sacomstop(tp, flag) 1206 struct tty *tp; 1207 int flag; 1208 { 1209 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1210 int s; 1211 1212 s = splserial(); 1213 COM_LOCK(sc); 1214 if (ISSET(tp->t_state, TS_BUSY)) { 1215 /* Stop transmitting at the next chunk. */ 1216 sc->sc_tbc = 0; 1217 sc->sc_heldtbc = 0; 1218 if (!ISSET(tp->t_state, TS_TTSTOP)) 1219 SET(tp->t_state, TS_FLUSH); 1220 } 1221 COM_UNLOCK(sc); 1222 splx(s); 1223 } 1224 1225 static inline void 1226 sacom_rxsoft(sc, tp) 1227 struct sacom_softc *sc; 1228 struct tty *tp; 1229 { 1230 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1231 u_char *get, *end; 1232 u_int cc, scc; 1233 u_char sr1; 1234 int code; 1235 int s; 1236 1237 end = sc->sc_ebuf; 1238 get = sc->sc_rbget; 1239 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1240 1241 while (cc) { 1242 code = get[0]; 1243 sr1 = get[1]; 1244 if (ISSET(sr1, SR1_FRE)) 1245 SET(code, TTY_FE); 1246 if (ISSET(sr1, SR1_PRE)) 1247 SET(code, TTY_PE); 1248 if ((*rint)(code, tp) == -1) { 1249 /* 1250 * The line discipline's buffer is out of space. 1251 */ 1252 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1253 /* 1254 * We're either not using flow control, or the 1255 * line discipline didn't tell us to block for 1256 * some reason. Either way, we have no way to 1257 * know when there's more space available, so 1258 * just drop the rest of the data. 1259 */ 1260 get += cc << 1; 1261 if (get >= end) 1262 get -= SACOM_RING_SIZE << 1; 1263 cc = 0; 1264 } else { 1265 /* 1266 * Don't schedule any more receive processing 1267 * until the line discipline tells us there's 1268 * space available (through comhwiflow()). 1269 * Leave the rest of the data in the input 1270 * buffer. 1271 */ 1272 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1273 } 1274 break; 1275 } 1276 get += 2; 1277 if (get >= end) 1278 get = sc->sc_rbuf; 1279 cc--; 1280 } 1281 1282 if (cc != scc) { 1283 sc->sc_rbget = get; 1284 s = splserial(); 1285 COM_LOCK(sc); 1286 1287 cc = sc->sc_rbavail += scc - cc; 1288 /* Buffers should be ok again, release possible block. */ 1289 if (cc >= 1) { 1290 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1291 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1292 SET(sc->sc_cr3, CR3_RIE); 1293 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1294 SACOM_CR3, sc->sc_cr3); 1295 } 1296 } 1297 COM_UNLOCK(sc); 1298 splx(s); 1299 } 1300 } 1301 1302 static inline void 1303 sacom_txsoft(sc, tp) 1304 struct sacom_softc *sc; 1305 struct tty *tp; 1306 { 1307 1308 CLR(tp->t_state, TS_BUSY); 1309 if (ISSET(tp->t_state, TS_FLUSH)) 1310 CLR(tp->t_state, TS_FLUSH); 1311 else 1312 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1313 (*tp->t_linesw->l_start)(tp); 1314 } 1315 1316 static inline void 1317 sacom_stsoft(sc, tp) 1318 struct sacom_softc *sc; 1319 struct tty *tp; 1320 { 1321 } 1322 1323 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1324 void 1325 sacomsoft(arg) 1326 void *arg; 1327 { 1328 struct sacom_softc *sc = arg; 1329 struct tty *tp; 1330 1331 if (COM_ISALIVE(sc) == 0) 1332 return; 1333 1334 { 1335 #else 1336 void 1337 sacomsoft() 1338 { 1339 struct sacom_softc *sc; 1340 struct tty *tp; 1341 int unit; 1342 1343 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1344 sc = device_lookup(&sacom_cd, unit); 1345 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1346 continue; 1347 1348 if (COM_ISALIVE(sc) == 0) 1349 continue; 1350 1351 tp = sc->sc_tty; 1352 if (tp == NULL) 1353 continue; 1354 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1355 continue; 1356 #endif 1357 tp = sc->sc_tty; 1358 1359 if (sc->sc_rx_ready) { 1360 sc->sc_rx_ready = 0; 1361 sacom_rxsoft(sc, tp); 1362 } 1363 1364 if (sc->sc_st_check) { 1365 sc->sc_st_check = 0; 1366 sacom_stsoft(sc, tp); 1367 } 1368 1369 if (sc->sc_tx_done) { 1370 sc->sc_tx_done = 0; 1371 sacom_txsoft(sc, tp); 1372 } 1373 } 1374 1375 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1376 #endif 1377 } 1378 1379 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1380 /* there has got to be a better way to do comsoft() */ 1381 }} 1382 #endif 1383 1384 int 1385 sacomintr(arg) 1386 void *arg; 1387 { 1388 struct sacom_softc *sc = arg; 1389 bus_space_tag_t iot = sc->sc_iot; 1390 bus_space_handle_t ioh = sc->sc_ioh; 1391 u_char *put, *end; 1392 u_int cc; 1393 u_int sr0, sr1; 1394 1395 if (COM_ISALIVE(sc) == 0) 1396 return (0); 1397 1398 COM_LOCK(sc); 1399 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1400 if (! sr0) { 1401 COM_UNLOCK(sc); 1402 return (0); 1403 } 1404 if (ISSET(sr0, SR0_EIF)) 1405 /* XXX silently discard error bits */ 1406 bus_space_read_4(iot, ioh, SACOM_DR); 1407 if (ISSET(sr0, SR0_RBB)) 1408 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1409 if (ISSET(sr0, SR0_REB)) { 1410 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1411 #if defined(DDB) || defined(KGDB) 1412 #ifndef DDB_BREAK_CHAR 1413 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1414 console_debugger(); 1415 } 1416 #endif 1417 #endif /* DDB || KGDB */ 1418 } 1419 1420 1421 end = sc->sc_ebuf; 1422 put = sc->sc_rbput; 1423 cc = sc->sc_rbavail; 1424 1425 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1426 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1427 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1428 while (cc > 0) { 1429 if (!ISSET(sr1, SR1_RNE)) { 1430 bus_space_write_4(iot, ioh, SACOM_SR0, 1431 SR0_RID); 1432 break; 1433 } 1434 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1435 put[1] = sr1; 1436 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1437 if (put[0] == DDB_BREAK_CHAR && 1438 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1439 console_debugger(); 1440 1441 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1442 continue; 1443 } 1444 #endif 1445 put += 2; 1446 if (put >= end) 1447 put = sc->sc_rbuf; 1448 cc--; 1449 1450 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1451 } 1452 1453 /* 1454 * Current string of incoming characters ended because 1455 * no more data was available or we ran out of space. 1456 * Schedule a receive event if any data was received. 1457 * If we're out of space, turn off receive interrupts. 1458 */ 1459 sc->sc_rbput = put; 1460 sc->sc_rbavail = cc; 1461 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1462 sc->sc_rx_ready = 1; 1463 1464 /* XXX do RX hardware flow control */ 1465 1466 /* 1467 * If we're out of space, disable receive interrupts 1468 * until the queue has drained a bit. 1469 */ 1470 if (!cc) { 1471 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1472 CLR(sc->sc_cr3, CR3_RIE); 1473 bus_space_write_4(iot, ioh, SACOM_CR3, 1474 sc->sc_cr3); 1475 } 1476 } else { 1477 #ifdef DIAGNOSTIC 1478 panic("sacomintr: we shouldn't reach here"); 1479 #endif 1480 CLR(sc->sc_cr3, CR3_RIE); 1481 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1482 } 1483 } 1484 1485 /* 1486 * Done handling any receive interrupts. See if data can be 1487 * transmitted as well. Schedule tx done event if no data left 1488 * and tty was marked busy. 1489 */ 1490 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1491 if (ISSET(sr0, SR0_TFS)) { 1492 /* 1493 * If we've delayed a parameter change, do it now, and restart 1494 * output. 1495 * XXX sacom_loadchanelregs() waits TX completion, 1496 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1497 */ 1498 if (sc->sc_heldchange) { 1499 sacom_loadchannelregs(sc); 1500 sc->sc_heldchange = 0; 1501 sc->sc_tbc = sc->sc_heldtbc; 1502 sc->sc_heldtbc = 0; 1503 } 1504 1505 /* Output the next chunk of the contiguous buffer, if any. */ 1506 if (sc->sc_tbc > 0) { 1507 sacom_filltx(sc); 1508 } else { 1509 /* Disable transmit completion interrupts if necessary. */ 1510 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1511 CLR(sc->sc_cr3, CR3_TIE); 1512 bus_space_write_4(iot, ioh, SACOM_CR3, 1513 sc->sc_cr3); 1514 } 1515 if (sc->sc_tx_busy) { 1516 sc->sc_tx_busy = 0; 1517 sc->sc_tx_done = 1; 1518 } 1519 } 1520 } 1521 COM_UNLOCK(sc); 1522 1523 /* Wake up the poller. */ 1524 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1525 softintr_schedule(sc->sc_si); 1526 #else 1527 setsoftserial(); 1528 #endif 1529 1530 #if NRND > 0 && defined(RND_COM) 1531 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1532 #endif 1533 return (1); 1534 } 1535 1536 static void 1537 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1538 1539 /* XXX this should be done at sc->enable function */ 1540 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1541 SAGPIO_PCR, 0xa0000); 1542 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1543 SAGPIO_PSR, 0x100); 1544 } 1545 1546 /* Initialization for serial console */ 1547 int 1548 sacominit(iot, iobase, baud, cflag, iohp) 1549 bus_space_tag_t iot; 1550 bus_addr_t iobase; 1551 int baud; 1552 tcflag_t cflag; 1553 bus_space_handle_t *iohp; 1554 { 1555 int brd, cr0; 1556 1557 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1558 printf("register map failed\n"); 1559 1560 /* wait for the Tx queue to drain and disable the UART */ 1561 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1562 ; 1563 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1564 1565 cr0 = cflag2cr0(cflag); 1566 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1567 1568 brd = SACOMSPEED(baud); 1569 sacomconsrate = baud; 1570 sacomconsaddr = iobase; 1571 sacomconscflag = cflag; 1572 /* XXX assumes little endian */ 1573 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1574 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1575 1576 /* enable the UART */ 1577 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1578 1579 return (0); 1580 } 1581 1582 void 1583 sacomcnprobe(cp) 1584 struct consdev *cp; 1585 { 1586 cp->cn_pri = CN_REMOTE; 1587 } 1588 1589 void 1590 sacomcninit(cp) 1591 struct consdev *cp; 1592 { 1593 if (cp == NULL) { 1594 /* XXX cp == NULL means that MMU is disabled. */ 1595 sacomconsioh = SACOM3_HW_BASE; 1596 sacomconstag = &sa11x0_bs_tag; 1597 cn_tab = &sacomcons; 1598 return; 1599 } 1600 1601 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1602 CONMODE, &sacomconsioh)) 1603 panic("can't init serial console @%x", CONADDR); 1604 cn_tab = &sacomcons; 1605 sacomconstag = &sa11x0_bs_tag; 1606 } 1607 1608 int 1609 sacomcngetc(dev) 1610 dev_t dev; 1611 { 1612 int c, s; 1613 1614 s = spltty(); /* XXX do we need this? */ 1615 1616 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1617 & SR1_RNE)) { 1618 #if defined(DDB) || defined(KGDB) 1619 #ifndef DDB_BREAK_CHAR 1620 u_int sr0; 1621 extern int db_active; 1622 1623 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1624 if (ISSET(sr0, SR0_RBB)) 1625 bus_space_write_4(sacomconstag, sacomconsioh, 1626 SACOM_SR0, SR0_RBB); 1627 if (ISSET(sr0, SR0_REB)) { 1628 bus_space_write_4(sacomconstag, sacomconsioh, 1629 SACOM_SR0, SR0_REB); 1630 if (db_active == 0) 1631 console_debugger(); 1632 } 1633 #endif 1634 #endif /* DDB || KGDB */ 1635 } 1636 1637 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1638 c &= 0xff; 1639 splx(s); 1640 1641 return (c); 1642 } 1643 1644 void 1645 sacomcnputc(dev, c) 1646 dev_t dev; 1647 int c; 1648 { 1649 int s; 1650 1651 s = spltty(); /* XXX do we need this? */ 1652 1653 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1654 & SR1_TNF)) 1655 ; 1656 1657 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1658 splx(s); 1659 } 1660 1661 void 1662 sacomcnpollc(dev, on) 1663 dev_t dev; 1664 int on; 1665 { 1666 1667 } 1668 1669 #if 0 1670 #ifdef DEBUG 1671 int 1672 sacomcncharpoll() 1673 { 1674 int c; 1675 1676 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1677 & SR1_RNE)) 1678 return -1; 1679 1680 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1681 c &= 0xff; 1682 1683 return (c); 1684 } 1685 #endif 1686 #endif 1687 1688 /* helper function to identify the com ports used by 1689 console or KGDB (and not yet autoconf attached) */ 1690 int 1691 sacom_is_console(iot, iobase, ioh) 1692 bus_space_tag_t iot; 1693 bus_addr_t iobase; 1694 bus_space_handle_t *ioh; 1695 { 1696 bus_space_handle_t help; 1697 1698 if (! sacomconsattached && 1699 iot == sacomconstag && iobase == sacomconsaddr) 1700 help = sacomconsioh; 1701 else 1702 return (0); 1703 1704 if (ioh) 1705 *ioh = help; 1706 return (1); 1707 } 1708
Indexes created Fri Oct 03 02:09:57 GMT 2025