sa11x0_com.c revision 1.10
1 /* $NetBSD: sa11x0_com.c,v 1.10 2002/10/02 05:02:31 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Charles M. Hannum. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * @(#)com.c 7.5 (Berkeley) 5/16/91 75 */ 76 77 #include "opt_com.h" 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 81 #include "rnd.h" 82 #if NRND > 0 && defined(RND_COM) 83 #include <sys/rnd.h> 84 #endif 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/types.h> 89 #include <sys/conf.h> 90 #include <sys/file.h> 91 #include <sys/device.h> 92 #include <sys/kernel.h> 93 #include <sys/malloc.h> 94 #include <sys/tty.h> 95 #include <sys/uio.h> 96 #include <sys/vnode.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/bus.h> 101 #include <arm/sa11x0/sa11x0_reg.h> 102 #include <arm/sa11x0/sa11x0_var.h> 103 #include <arm/sa11x0/sa11x0_comreg.h> 104 #include <arm/sa11x0/sa11x0_comvar.h> 105 #include <arm/sa11x0/sa11x0_gpioreg.h> 106 107 #ifdef hpcarm 108 #include <hpc/include/platid.h> 109 #include <hpc/include/platid_mask.h> 110 #endif 111 112 #include "sacom.h" 113 114 dev_type_open(sacomopen); 115 dev_type_close(sacomclose); 116 dev_type_read(sacomread); 117 dev_type_write(sacomwrite); 118 dev_type_ioctl(sacomioctl); 119 dev_type_stop(sacomstop); 120 dev_type_tty(sacomtty); 121 dev_type_poll(sacompoll); 122 123 const struct cdevsw sacom_cdevsw = { 124 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 125 sacomstop, sacomtty, sacompoll, nommap, D_TTY 126 }; 127 128 static int sacom_match(struct device *, struct cfdata *, void *); 129 static void sacom_attach(struct device *, struct device *, void *); 130 static void sacom_filltx(struct sacom_softc *); 131 static void sacom_attach_subr(struct sacom_softc *); 132 #if defined(DDB) || defined(KGDB) 133 static void sacom_enable_debugport(struct sacom_softc *); 134 #endif 135 void sacom_config(struct sacom_softc *); 136 void sacom_shutdown(struct sacom_softc *); 137 static u_int cflag2cr0(tcflag_t); 138 int sacomparam(struct tty *, struct termios *); 139 void sacomstart(struct tty *); 140 int sacomhwiflow(struct tty *, int); 141 142 void sacom_loadchannelregs(struct sacom_softc *); 143 void sacom_hwiflow(struct sacom_softc *); 144 void sacom_break(struct sacom_softc *, int); 145 void sacom_modem(struct sacom_softc *, int); 146 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 147 int sacom_to_tiocm(struct sacom_softc *); 148 void sacom_iflush(struct sacom_softc *); 149 150 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 151 void sacomsoft(void *); 152 #else 153 void sacomsoft(void); 154 #endif 155 156 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 157 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 158 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 159 static inline void sacom_schedrx(struct sacom_softc *); 160 161 #ifdef hpcarm 162 /* HPCARM specific functions */ 163 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 164 #endif 165 166 #define COMUNIT_MASK 0x7ffff 167 #define COMDIALOUT_MASK 0x80000 168 169 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 170 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 171 172 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 173 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 174 175 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 176 #define COM_LOCK(sc) 177 #define COM_UNLOCK(sc) 178 179 #define SET(t, f) (t) |= (f) 180 #define CLR(t, f) (t) &= ~(f) 181 #define ISSET(t, f) ((t) & (f)) 182 183 int sacomintr(void *); 184 int sacomcngetc(dev_t); 185 void sacomcnputc(dev_t, int); 186 void sacomcnpollc(dev_t, int); 187 188 void sacomcnprobe(struct consdev *); 189 void sacomcninit(struct consdev *); 190 191 extern struct bus_space sa11x0_bs_tag; 192 193 static bus_space_tag_t sacomconstag; 194 static bus_space_handle_t sacomconsioh; 195 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 196 197 static int sacomconsattached; 198 static int sacomconsrate; 199 static tcflag_t sacomconscflag; 200 201 CFATTACH_DECL(sacom, sizeof(struct sacom_softc), 202 sacom_match, sacom_attach, NULL, NULL); 203 extern struct cfdriver sacom_cd; 204 205 #ifdef hpcarm 206 struct platid_data sacom_platid_table[] = { 207 { &platid_mask_MACH_HP_JORNADA_720, sacom_j720_init }, 208 { &platid_mask_MACH_HP_JORNADA_720JP, sacom_j720_init }, 209 { NULL, NULL } 210 }; 211 #endif 212 213 struct consdev sacomcons = { 214 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 215 NODEV, CN_NORMAL 216 }; 217 218 #ifndef CONMODE 219 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 220 #endif 221 #ifndef CONSPEED 222 #define CONSPEED 9600 223 #endif 224 #ifndef CONADDR 225 #define CONADDR SACOM3_BASE 226 #endif 227 228 static int 229 sacom_match(parent, match, aux) 230 struct device *parent; 231 struct cfdata *match; 232 void *aux; 233 { 234 return (1); 235 } 236 237 void 238 sacom_attach(parent, self, aux) 239 struct device *parent; 240 struct device *self; 241 void *aux; 242 { 243 struct sacom_softc *sc = (struct sacom_softc*)self; 244 struct sa11x0_attach_args *sa = aux; 245 246 #ifdef hpcarm 247 struct platid_data *p; 248 void (*mdinit)(struct device *, struct sacom_softc *); 249 #endif 250 251 printf("\n"); 252 253 sc->sc_iot = sa->sa_iot; 254 sc->sc_baseaddr = sa->sa_addr; 255 256 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 257 &sc->sc_ioh)) { 258 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 259 return; 260 } 261 262 printf("%s: ", sc->sc_dev.dv_xname); 263 switch(sc->sc_baseaddr) { 264 case 0x80050000: 265 printf("SA11x0 UART3\n"); 266 break; 267 case 0x80010000: 268 printf("SA11x0 UART1\n"); 269 break; 270 case 0x80030000: 271 printf("SA11x0 UART2 (IRDA)\n"); 272 break; 273 default: 274 printf("unknown SA11x0 UART\n"); 275 break; 276 } 277 278 sacom_attach_subr(sc); 279 280 #ifdef hpcarm 281 /* Do hpcarm specific initialization, if any */ 282 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 283 mdinit = p->data; 284 (mdinit)(parent, sc); 285 } 286 #endif 287 288 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 289 } 290 291 void 292 sacom_attach_subr(sc) 293 struct sacom_softc *sc; 294 { 295 bus_addr_t iobase = sc->sc_baseaddr; 296 bus_space_tag_t iot = sc->sc_iot; 297 struct tty *tp; 298 299 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 300 simple_lock_init(&sc->sc_lock); 301 #endif 302 303 /* XXX Do we need to disable interrupts here? */ 304 305 if (iot == sacomconstag && iobase == sacomconsaddr) { 306 sacomconsattached = 1; 307 sc->sc_speed = SACOMSPEED(sacomconsrate); 308 309 /* Make sure the console is always "hardwired". */ 310 delay(10000); /* wait for output to finish */ 311 SET(sc->sc_hwflags, COM_HW_CONSOLE); 312 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 313 } 314 315 tp = ttymalloc(); 316 tp->t_oproc = sacomstart; 317 tp->t_param = sacomparam; 318 tp->t_hwiflow = sacomhwiflow; 319 320 sc->sc_tty = tp; 321 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 322 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 323 sc->sc_rbavail = SACOM_RING_SIZE; 324 if (sc->sc_rbuf == NULL) { 325 printf("%s: unable to allocate ring buffer\n", 326 sc->sc_dev.dv_xname); 327 return; 328 } 329 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 330 sc->sc_tbc = 0; 331 332 tty_attach(tp); 333 334 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 335 int maj; 336 337 /* locate the major number */ 338 maj = cdevsw_lookup_major(&sacom_cdevsw); 339 340 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 341 342 delay(10000); /* XXX */ 343 printf("%s: console\n", sc->sc_dev.dv_xname); 344 delay(10000); /* XXX */ 345 } 346 347 348 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 349 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 350 #endif 351 352 #if NRND > 0 && defined(RND_COM) 353 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 354 RND_TYPE_TTY, 0); 355 #endif 356 357 /* if there are no enable/disable functions, assume the device 358 is always enabled */ 359 if (!sc->enable) 360 sc->enabled = 1; 361 362 sacom_config(sc); 363 364 SET(sc->sc_hwflags, COM_HW_DEV_OK); 365 } 366 367 /* This is necessary when dynamically changing SAIP configuration. */ 368 int 369 sacom_detach(self, flags) 370 struct device *self; 371 int flags; 372 { 373 struct sacom_softc *sc = (struct sacom_softc *)self; 374 int maj, mn; 375 376 /* locate the major number */ 377 maj = cdevsw_lookup_major(&sacom_cdevsw); 378 379 /* Nuke the vnodes for any open instances. */ 380 mn = self->dv_unit; 381 vdevgone(maj, mn, mn, VCHR); 382 383 mn |= COMDIALOUT_MASK; 384 vdevgone(maj, mn, mn, VCHR); 385 386 /* Free the receive buffer. */ 387 free(sc->sc_rbuf, M_DEVBUF); 388 389 /* Detach and free the tty. */ 390 tty_detach(sc->sc_tty); 391 ttyfree(sc->sc_tty); 392 393 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 394 /* Unhook the soft interrupt handler. */ 395 softintr_disestablish(sc->sc_si); 396 #endif 397 398 #if NRND > 0 && defined(RND_COM) 399 /* Unhook the entropy source. */ 400 rnd_detach_source(&sc->rnd_source); 401 #endif 402 403 return (0); 404 } 405 406 void 407 sacom_config(sc) 408 struct sacom_softc *sc; 409 { 410 bus_space_tag_t iot = sc->sc_iot; 411 bus_space_handle_t ioh = sc->sc_ioh; 412 413 /* Disable engine before configuring the device. */ 414 sc->sc_cr3 = 0; 415 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 416 417 #ifdef DDB 418 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 419 sacom_enable_debugport(sc); 420 #endif 421 } 422 423 #ifdef DDB 424 static void 425 sacom_enable_debugport(sc) 426 struct sacom_softc *sc; 427 { 428 bus_space_tag_t iot = sc->sc_iot; 429 bus_space_handle_t ioh = sc->sc_ioh; 430 int s; 431 432 s = splserial(); 433 COM_LOCK(sc); 434 sc->sc_cr3 = CR3_RXE | CR3_TXE; 435 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 436 COM_UNLOCK(sc); 437 splx(s); 438 } 439 #endif 440 441 int 442 sacom_activate(self, act) 443 struct device *self; 444 enum devact act; 445 { 446 struct sacom_softc *sc = (struct sacom_softc *)self; 447 int s, rv = 0; 448 449 s = splserial(); 450 COM_LOCK(sc); 451 switch (act) { 452 case DVACT_ACTIVATE: 453 rv = EOPNOTSUPP; 454 break; 455 456 case DVACT_DEACTIVATE: 457 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 458 rv = EBUSY; 459 break; 460 } 461 462 if (sc->disable != NULL && sc->enabled != 0) { 463 (*sc->disable)(sc); 464 sc->enabled = 0; 465 } 466 break; 467 } 468 469 COM_UNLOCK(sc); 470 splx(s); 471 return (rv); 472 } 473 474 void 475 sacom_shutdown(sc) 476 struct sacom_softc *sc; 477 { 478 struct tty *tp = sc->sc_tty; 479 int s; 480 481 s = splserial(); 482 COM_LOCK(sc); 483 484 /* Clear any break condition set with TIOCSBRK. */ 485 sacom_break(sc, 0); 486 487 /* 488 * Hang up if necessary. Wait a bit, so the other side has time to 489 * notice even if we immediately open the port again. 490 * Avoid tsleeping above splhigh(). 491 */ 492 if (ISSET(tp->t_cflag, HUPCL)) { 493 sacom_modem(sc, 0); 494 COM_UNLOCK(sc); 495 splx(s); 496 /* XXX tsleep will only timeout */ 497 (void) tsleep(sc, TTIPRI, ttclos, hz); 498 s = splserial(); 499 COM_LOCK(sc); 500 } 501 502 /* Turn off interrupts. */ 503 sc->sc_cr3 = 0; 504 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 505 506 if (sc->disable) { 507 #ifdef DIAGNOSTIC 508 if (!sc->enabled) 509 panic("sacom_shutdown: not enabled?"); 510 #endif 511 (*sc->disable)(sc); 512 sc->enabled = 0; 513 } 514 COM_UNLOCK(sc); 515 splx(s); 516 } 517 518 int 519 sacomopen(dev, flag, mode, p) 520 dev_t dev; 521 int flag, mode; 522 struct proc *p; 523 { 524 struct sacom_softc *sc; 525 struct tty *tp; 526 int s, s2; 527 int error; 528 529 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 530 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 531 sc->sc_rbuf == NULL) 532 return (ENXIO); 533 534 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 535 return (ENXIO); 536 537 tp = sc->sc_tty; 538 539 if (ISSET(tp->t_state, TS_ISOPEN) && 540 ISSET(tp->t_state, TS_XCLUDE) && 541 p->p_ucred->cr_uid != 0) 542 return (EBUSY); 543 544 s = spltty(); 545 546 /* 547 * Do the following iff this is a first open. 548 */ 549 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 550 struct termios t; 551 552 tp->t_dev = dev; 553 554 s2 = splserial(); 555 COM_LOCK(sc); 556 557 if (sc->enable) { 558 if ((*sc->enable)(sc)) { 559 COM_UNLOCK(sc); 560 splx(s2); 561 splx(s); 562 printf("%s: device enable failed\n", 563 sc->sc_dev.dv_xname); 564 return (EIO); 565 } 566 sc->enabled = 1; 567 sacom_config(sc); 568 } 569 570 /* Turn on interrupts. */ 571 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 572 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 573 sc->sc_cr3); 574 575 576 COM_UNLOCK(sc); 577 splx(s2); 578 579 /* 580 * Initialize the termios status to the defaults. Add in the 581 * sticky bits from TIOCSFLAGS. 582 */ 583 t.c_ispeed = 0; 584 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 585 t.c_ospeed = sacomconsrate; 586 t.c_cflag = sacomconscflag; 587 } else { 588 t.c_ospeed = TTYDEF_SPEED; 589 t.c_cflag = TTYDEF_CFLAG; 590 } 591 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 592 SET(t.c_cflag, CLOCAL); 593 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 594 SET(t.c_cflag, CRTSCTS); 595 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 596 SET(t.c_cflag, MDMBUF); 597 /* Make sure sacomparam() will do something. */ 598 tp->t_ospeed = 0; 599 (void) sacomparam(tp, &t); 600 tp->t_iflag = TTYDEF_IFLAG; 601 tp->t_oflag = TTYDEF_OFLAG; 602 tp->t_lflag = TTYDEF_LFLAG; 603 ttychars(tp); 604 ttsetwater(tp); 605 606 s2 = splserial(); 607 COM_LOCK(sc); 608 609 /* 610 * Turn on DTR. We must always do this, even if carrier is not 611 * present, because otherwise we'd have to use TIOCSDTR 612 * immediately after setting CLOCAL, which applications do not 613 * expect. We always assert DTR while the device is open 614 * unless explicitly requested to deassert it. 615 */ 616 sacom_modem(sc, 1); 617 618 /* Clear the input ring, and unblock. */ 619 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 620 sc->sc_rbavail = SACOM_RING_SIZE; 621 sacom_iflush(sc); 622 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 623 sacom_hwiflow(sc); 624 625 #ifdef COM_DEBUG 626 if (sacom_debug) 627 comstatus(sc, "sacomopen "); 628 #endif 629 630 COM_UNLOCK(sc); 631 splx(s2); 632 } 633 634 splx(s); 635 636 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 637 if (error) 638 goto bad; 639 640 error = (*tp->t_linesw->l_open)(dev, tp); 641 if (error) 642 goto bad; 643 644 return (0); 645 646 bad: 647 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 648 /* 649 * We failed to open the device, and nobody else had it opened. 650 * Clean up the state as appropriate. 651 */ 652 sacom_shutdown(sc); 653 } 654 655 return (error); 656 } 657 658 int 659 sacomclose(dev, flag, mode, p) 660 dev_t dev; 661 int flag, mode; 662 struct proc *p; 663 { 664 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 665 struct tty *tp = sc->sc_tty; 666 667 /* XXX This is for cons.c. */ 668 if (!ISSET(tp->t_state, TS_ISOPEN)) 669 return (0); 670 671 (*tp->t_linesw->l_close)(tp, flag); 672 ttyclose(tp); 673 674 if (COM_ISALIVE(sc) == 0) 675 return (0); 676 677 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 678 /* 679 * Although we got a last close, the device may still be in 680 * use; e.g. if this was the dialout node, and there are still 681 * processes waiting for carrier on the non-dialout node. 682 */ 683 sacom_shutdown(sc); 684 } 685 686 return (0); 687 } 688 689 int 690 sacomread(dev, uio, flag) 691 dev_t dev; 692 struct uio *uio; 693 int flag; 694 { 695 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 696 struct tty *tp = sc->sc_tty; 697 698 if (COM_ISALIVE(sc) == 0) 699 return (EIO); 700 701 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 702 } 703 704 int 705 sacomwrite(dev, uio, flag) 706 dev_t dev; 707 struct uio *uio; 708 int flag; 709 { 710 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 711 struct tty *tp = sc->sc_tty; 712 713 if (COM_ISALIVE(sc) == 0) 714 return (EIO); 715 716 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 717 } 718 719 int 720 sacompoll(dev, events, p) 721 dev_t dev; 722 int events; 723 struct proc *p; 724 { 725 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 726 struct tty *tp = sc->sc_tty; 727 728 if (COM_ISALIVE(sc) == 0) 729 return (EIO); 730 731 return ((*tp->t_linesw->l_poll)(tp, events, p)); 732 } 733 734 struct tty * 735 sacomtty(dev) 736 dev_t dev; 737 { 738 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 739 struct tty *tp = sc->sc_tty; 740 741 return (tp); 742 } 743 744 int 745 sacomioctl(dev, cmd, data, flag, p) 746 dev_t dev; 747 u_long cmd; 748 caddr_t data; 749 int flag; 750 struct proc *p; 751 { 752 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 753 struct tty *tp = sc->sc_tty; 754 int error; 755 int s; 756 757 if (COM_ISALIVE(sc) == 0) 758 return (EIO); 759 760 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 761 if (error != EPASSTHROUGH) 762 return (error); 763 764 error = ttioctl(tp, cmd, data, flag, p); 765 if (error != EPASSTHROUGH) 766 return (error); 767 768 error = 0; 769 770 s = splserial(); 771 COM_LOCK(sc); 772 773 switch (cmd) { 774 case TIOCSBRK: 775 sacom_break(sc, 1); 776 break; 777 778 case TIOCCBRK: 779 sacom_break(sc, 0); 780 break; 781 782 case TIOCSDTR: 783 sacom_modem(sc, 1); 784 break; 785 786 case TIOCCDTR: 787 sacom_modem(sc, 0); 788 break; 789 790 case TIOCGFLAGS: 791 *(int *)data = sc->sc_swflags; 792 break; 793 794 case TIOCSFLAGS: 795 error = suser(p->p_ucred, &p->p_acflag); 796 if (error) 797 break; 798 sc->sc_swflags = *(int *)data; 799 break; 800 801 case TIOCMSET: 802 case TIOCMBIS: 803 case TIOCMBIC: 804 tiocm_to_sacom(sc, cmd, *(int *)data); 805 break; 806 807 case TIOCMGET: 808 *(int *)data = sacom_to_tiocm(sc); 809 break; 810 811 default: 812 error = EPASSTHROUGH; 813 break; 814 } 815 816 COM_UNLOCK(sc); 817 splx(s); 818 819 #ifdef COM_DEBUG 820 if (sacom_debug) 821 comstatus(sc, "comioctl "); 822 #endif 823 824 return (error); 825 } 826 827 static inline void 828 sacom_schedrx(sc) 829 struct sacom_softc *sc; 830 { 831 832 sc->sc_rx_ready = 1; 833 834 /* Wake up the poller. */ 835 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 836 softintr_schedule(sc->sc_si); 837 #else 838 setsoftserial(); 839 #endif 840 } 841 842 void 843 sacom_break(sc, onoff) 844 struct sacom_softc *sc; 845 int onoff; 846 { 847 848 if (onoff) 849 SET(sc->sc_cr3, CR3_BRK); 850 else 851 CLR(sc->sc_cr3, CR3_BRK); 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 sacom_modem(sc, onoff) 865 struct sacom_softc *sc; 866 int onoff; 867 { 868 if (!sc->sc_heldchange) { 869 if (sc->sc_tx_busy) { 870 sc->sc_heldtbc = sc->sc_tbc; 871 sc->sc_tbc = 0; 872 sc->sc_heldchange = 1; 873 } else 874 sacom_loadchannelregs(sc); 875 } 876 } 877 878 void 879 tiocm_to_sacom(sc, how, ttybits) 880 struct sacom_softc *sc; 881 u_long how; 882 int ttybits; 883 { 884 } 885 886 int 887 sacom_to_tiocm(sc) 888 struct sacom_softc *sc; 889 { 890 int ttybits = 0; 891 892 if (sc->sc_cr3 != 0) 893 SET(ttybits, TIOCM_LE); 894 895 return (ttybits); 896 } 897 898 static u_int 899 cflag2cr0(cflag) 900 tcflag_t cflag; 901 { 902 u_int cr0; 903 904 cr0 = (cflag & PARENB) ? CR0_PE : 0; 905 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 906 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 907 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 908 909 return (cr0); 910 } 911 912 int 913 sacomparam(tp, t) 914 struct tty *tp; 915 struct termios *t; 916 { 917 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 918 int ospeed = SACOMSPEED(t->c_ospeed); 919 u_int cr0; 920 int s; 921 922 if (COM_ISALIVE(sc) == 0) 923 return (EIO); 924 925 /* Check requested parameters. */ 926 if (ospeed < 0) 927 return (EINVAL); 928 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 929 return (EINVAL); 930 931 /* 932 * For the console, always force CLOCAL and !HUPCL, so that the port 933 * is always active. 934 */ 935 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 936 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 937 SET(t->c_cflag, CLOCAL); 938 CLR(t->c_cflag, HUPCL); 939 } 940 941 /* 942 * If there were no changes, don't do anything. This avoids dropping 943 * input and improves performance when all we did was frob things like 944 * VMIN and VTIME. 945 */ 946 if (tp->t_ospeed == t->c_ospeed && 947 tp->t_cflag == t->c_cflag) 948 return (0); 949 950 cr0 = cflag2cr0(t->c_cflag); 951 952 s = splserial(); 953 COM_LOCK(sc); 954 955 sc->sc_cr0 = cr0; 956 957 sc->sc_speed = ospeed; 958 959 /* And copy to tty. */ 960 tp->t_ispeed = 0; 961 tp->t_ospeed = t->c_ospeed; 962 tp->t_cflag = t->c_cflag; 963 964 if (!sc->sc_heldchange) { 965 if (sc->sc_tx_busy) { 966 sc->sc_heldtbc = sc->sc_tbc; 967 sc->sc_tbc = 0; 968 sc->sc_heldchange = 1; 969 } else 970 sacom_loadchannelregs(sc); 971 } 972 973 if (!ISSET(t->c_cflag, CHWFLOW)) { 974 /* Disable the high water mark. */ 975 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 976 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 977 sacom_schedrx(sc); 978 } 979 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 980 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 981 sacom_hwiflow(sc); 982 } 983 } 984 985 COM_UNLOCK(sc); 986 splx(s); 987 988 (void) (*tp->t_linesw->l_modem)(tp, 1); 989 990 #ifdef COM_DEBUG 991 if (sacom_debug) 992 comstatus(sc, "comparam "); 993 #endif 994 995 return (0); 996 } 997 998 void 999 sacom_iflush(sc) 1000 struct sacom_softc *sc; 1001 { 1002 bus_space_tag_t iot = sc->sc_iot; 1003 bus_space_handle_t ioh = sc->sc_ioh; 1004 #ifdef DIAGNOSTIC 1005 int reg; 1006 #endif 1007 int timo; 1008 1009 #ifdef DIAGNOSTIC 1010 reg = 0xffff; 1011 #endif 1012 timo = 50; 1013 /* flush any pending I/O */ 1014 if (sc->sc_cr3 & CR3_RXE) { 1015 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1016 && --timo) 1017 #ifdef DIAGNOSTIC 1018 reg = 1019 #else 1020 (void) 1021 #endif 1022 bus_space_read_4(iot, ioh, SACOM_DR); 1023 } 1024 #if 0 1025 /* XXX is it good idea to wait TX finish? */ 1026 if (sc->sc_cr3 & CR3_TXE) { 1027 timo = 500; 1028 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1029 && --timo) 1030 delay(100); 1031 } 1032 #endif 1033 #ifdef DIAGNOSTIC 1034 if (!timo) 1035 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1036 reg); 1037 #endif 1038 } 1039 1040 void 1041 sacom_loadchannelregs(sc) 1042 struct sacom_softc *sc; 1043 { 1044 bus_space_tag_t iot = sc->sc_iot; 1045 bus_space_handle_t ioh = sc->sc_ioh; 1046 1047 /* XXXXX necessary? */ 1048 sacom_iflush(sc); 1049 1050 /* Need to stop engines first. */ 1051 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1052 1053 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1054 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1055 1056 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1057 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1058 } 1059 1060 int 1061 sacomhwiflow(tp, block) 1062 struct tty *tp; 1063 int block; 1064 { 1065 #if 0 1066 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1067 int s; 1068 1069 if (COM_ISALIVE(sc) == 0) 1070 return (0); 1071 1072 if (sc->sc_mcr_rts == 0) 1073 return (0); 1074 1075 s = splserial(); 1076 COM_LOCK(sc); 1077 1078 if (block) { 1079 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1080 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1081 sacom_hwiflow(sc); 1082 } 1083 } else { 1084 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1085 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1086 sacom_schedrx(sc); 1087 } 1088 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1089 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1090 sacom_hwiflow(sc); 1091 } 1092 } 1093 1094 COM_UNLOCK(sc); 1095 splx(s); 1096 #endif 1097 return (1); 1098 } 1099 1100 /* 1101 * (un)block input via hw flowcontrol 1102 */ 1103 void 1104 sacom_hwiflow(sc) 1105 struct sacom_softc *sc; 1106 { 1107 #if 0 1108 bus_space_tag_t iot = sc->sc_iot; 1109 bus_space_handle_t ioh = sc->sc_ioh; 1110 1111 /* XXX implement */ 1112 #endif 1113 } 1114 1115 1116 void 1117 sacomstart(tp) 1118 struct tty *tp; 1119 { 1120 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1121 bus_space_tag_t iot = sc->sc_iot; 1122 bus_space_handle_t ioh = sc->sc_ioh; 1123 int s; 1124 1125 if (COM_ISALIVE(sc) == 0) 1126 return; 1127 1128 s = spltty(); 1129 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1130 goto out; 1131 1132 if (tp->t_outq.c_cc <= tp->t_lowat) { 1133 if (ISSET(tp->t_state, TS_ASLEEP)) { 1134 CLR(tp->t_state, TS_ASLEEP); 1135 wakeup(&tp->t_outq); 1136 } 1137 selwakeup(&tp->t_wsel); 1138 if (tp->t_outq.c_cc == 0) 1139 goto out; 1140 } 1141 1142 /* Grab the first contiguous region of buffer space. */ 1143 { 1144 u_char *tba; 1145 int tbc; 1146 1147 tba = tp->t_outq.c_cf; 1148 tbc = ndqb(&tp->t_outq, 0); 1149 1150 (void)splserial(); 1151 COM_LOCK(sc); 1152 1153 sc->sc_tba = tba; 1154 sc->sc_tbc = tbc; 1155 } 1156 1157 SET(tp->t_state, TS_BUSY); 1158 sc->sc_tx_busy = 1; 1159 1160 /* Enable transmit completion interrupts if necessary. */ 1161 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1162 SET(sc->sc_cr3, CR3_TIE); 1163 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1164 } 1165 1166 /* Output the first chunk of the contiguous buffer. */ 1167 sacom_filltx(sc); 1168 1169 COM_UNLOCK(sc); 1170 out: 1171 splx(s); 1172 return; 1173 } 1174 1175 void 1176 sacom_filltx(sc) 1177 struct sacom_softc *sc; 1178 { 1179 bus_space_tag_t iot = sc->sc_iot; 1180 bus_space_handle_t ioh = sc->sc_ioh; 1181 int c, n; 1182 1183 n = 0; 1184 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1185 & SR1_TNF) { 1186 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1187 break; 1188 c = *(sc->sc_tba + n); 1189 c &= 0xff; 1190 bus_space_write_4(iot, ioh, SACOM_DR, c); 1191 n++; 1192 } 1193 sc->sc_tbc -= n; 1194 sc->sc_tba += n; 1195 } 1196 1197 /* 1198 * Stop output on a line. 1199 */ 1200 void 1201 sacomstop(tp, flag) 1202 struct tty *tp; 1203 int flag; 1204 { 1205 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1206 int s; 1207 1208 s = splserial(); 1209 COM_LOCK(sc); 1210 if (ISSET(tp->t_state, TS_BUSY)) { 1211 /* Stop transmitting at the next chunk. */ 1212 sc->sc_tbc = 0; 1213 sc->sc_heldtbc = 0; 1214 if (!ISSET(tp->t_state, TS_TTSTOP)) 1215 SET(tp->t_state, TS_FLUSH); 1216 } 1217 COM_UNLOCK(sc); 1218 splx(s); 1219 } 1220 1221 static inline void 1222 sacom_rxsoft(sc, tp) 1223 struct sacom_softc *sc; 1224 struct tty *tp; 1225 { 1226 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1227 u_char *get, *end; 1228 u_int cc, scc; 1229 u_char sr1; 1230 int code; 1231 int s; 1232 1233 end = sc->sc_ebuf; 1234 get = sc->sc_rbget; 1235 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1236 1237 while (cc) { 1238 code = get[0]; 1239 sr1 = get[1]; 1240 if (ISSET(sr1, SR1_FRE)) 1241 SET(code, TTY_FE); 1242 if (ISSET(sr1, SR1_PRE)) 1243 SET(code, TTY_PE); 1244 if ((*rint)(code, tp) == -1) { 1245 /* 1246 * The line discipline's buffer is out of space. 1247 */ 1248 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1249 /* 1250 * We're either not using flow control, or the 1251 * line discipline didn't tell us to block for 1252 * some reason. Either way, we have no way to 1253 * know when there's more space available, so 1254 * just drop the rest of the data. 1255 */ 1256 get += cc << 1; 1257 if (get >= end) 1258 get -= SACOM_RING_SIZE << 1; 1259 cc = 0; 1260 } else { 1261 /* 1262 * Don't schedule any more receive processing 1263 * until the line discipline tells us there's 1264 * space available (through comhwiflow()). 1265 * Leave the rest of the data in the input 1266 * buffer. 1267 */ 1268 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1269 } 1270 break; 1271 } 1272 get += 2; 1273 if (get >= end) 1274 get = sc->sc_rbuf; 1275 cc--; 1276 } 1277 1278 if (cc != scc) { 1279 sc->sc_rbget = get; 1280 s = splserial(); 1281 COM_LOCK(sc); 1282 1283 cc = sc->sc_rbavail += scc - cc; 1284 /* Buffers should be ok again, release possible block. */ 1285 if (cc >= 1) { 1286 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1287 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1288 SET(sc->sc_cr3, CR3_RIE); 1289 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1290 SACOM_CR3, sc->sc_cr3); 1291 } 1292 } 1293 COM_UNLOCK(sc); 1294 splx(s); 1295 } 1296 } 1297 1298 static inline void 1299 sacom_txsoft(sc, tp) 1300 struct sacom_softc *sc; 1301 struct tty *tp; 1302 { 1303 1304 CLR(tp->t_state, TS_BUSY); 1305 if (ISSET(tp->t_state, TS_FLUSH)) 1306 CLR(tp->t_state, TS_FLUSH); 1307 else 1308 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1309 (*tp->t_linesw->l_start)(tp); 1310 } 1311 1312 static inline void 1313 sacom_stsoft(sc, tp) 1314 struct sacom_softc *sc; 1315 struct tty *tp; 1316 { 1317 } 1318 1319 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1320 void 1321 sacomsoft(arg) 1322 void *arg; 1323 { 1324 struct sacom_softc *sc = arg; 1325 struct tty *tp; 1326 1327 if (COM_ISALIVE(sc) == 0) 1328 return; 1329 1330 { 1331 #else 1332 void 1333 sacomsoft() 1334 { 1335 struct sacom_softc *sc; 1336 struct tty *tp; 1337 int unit; 1338 1339 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1340 sc = device_lookup(&sacom_cd, unit); 1341 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1342 continue; 1343 1344 if (COM_ISALIVE(sc) == 0) 1345 continue; 1346 1347 tp = sc->sc_tty; 1348 if (tp == NULL) 1349 continue; 1350 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1351 continue; 1352 #endif 1353 tp = sc->sc_tty; 1354 1355 if (sc->sc_rx_ready) { 1356 sc->sc_rx_ready = 0; 1357 sacom_rxsoft(sc, tp); 1358 } 1359 1360 if (sc->sc_st_check) { 1361 sc->sc_st_check = 0; 1362 sacom_stsoft(sc, tp); 1363 } 1364 1365 if (sc->sc_tx_done) { 1366 sc->sc_tx_done = 0; 1367 sacom_txsoft(sc, tp); 1368 } 1369 } 1370 1371 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1372 #endif 1373 } 1374 1375 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1376 /* there has got to be a better way to do comsoft() */ 1377 }} 1378 #endif 1379 1380 int 1381 sacomintr(arg) 1382 void *arg; 1383 { 1384 struct sacom_softc *sc = arg; 1385 bus_space_tag_t iot = sc->sc_iot; 1386 bus_space_handle_t ioh = sc->sc_ioh; 1387 u_char *put, *end; 1388 u_int cc; 1389 u_int sr0, sr1; 1390 1391 if (COM_ISALIVE(sc) == 0) 1392 return (0); 1393 1394 COM_LOCK(sc); 1395 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1396 if (! sr0) { 1397 COM_UNLOCK(sc); 1398 return (0); 1399 } 1400 if (ISSET(sr0, SR0_EIF)) 1401 /* XXX silently discard error bits */ 1402 bus_space_read_4(iot, ioh, SACOM_DR); 1403 if (ISSET(sr0, SR0_RBB)) 1404 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1405 if (ISSET(sr0, SR0_REB)) { 1406 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1407 #if defined(DDB) || defined(KGDB) 1408 #ifndef DDB_BREAK_CHAR 1409 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1410 console_debugger(); 1411 } 1412 #endif 1413 #endif /* DDB || KGDB */ 1414 } 1415 1416 1417 end = sc->sc_ebuf; 1418 put = sc->sc_rbput; 1419 cc = sc->sc_rbavail; 1420 1421 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1422 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1423 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1424 while (cc > 0) { 1425 if (!ISSET(sr1, SR1_RNE)) { 1426 bus_space_write_4(iot, ioh, SACOM_SR0, 1427 SR0_RID); 1428 break; 1429 } 1430 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1431 put[1] = sr1; 1432 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1433 if (put[0] == DDB_BREAK_CHAR && 1434 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1435 console_debugger(); 1436 1437 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1438 continue; 1439 } 1440 #endif 1441 put += 2; 1442 if (put >= end) 1443 put = sc->sc_rbuf; 1444 cc--; 1445 1446 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1447 } 1448 1449 /* 1450 * Current string of incoming characters ended because 1451 * no more data was available or we ran out of space. 1452 * Schedule a receive event if any data was received. 1453 * If we're out of space, turn off receive interrupts. 1454 */ 1455 sc->sc_rbput = put; 1456 sc->sc_rbavail = cc; 1457 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1458 sc->sc_rx_ready = 1; 1459 1460 /* XXX do RX hardware flow control */ 1461 1462 /* 1463 * If we're out of space, disable receive interrupts 1464 * until the queue has drained a bit. 1465 */ 1466 if (!cc) { 1467 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1468 CLR(sc->sc_cr3, CR3_RIE); 1469 bus_space_write_4(iot, ioh, SACOM_CR3, 1470 sc->sc_cr3); 1471 } 1472 } else { 1473 #ifdef DIAGNOSTIC 1474 panic("sacomintr: we shouldn't reach here"); 1475 #endif 1476 CLR(sc->sc_cr3, CR3_RIE); 1477 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1478 } 1479 } 1480 1481 /* 1482 * Done handling any receive interrupts. See if data can be 1483 * transmitted as well. Schedule tx done event if no data left 1484 * and tty was marked busy. 1485 */ 1486 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1487 if (ISSET(sr0, SR0_TFS)) { 1488 /* 1489 * If we've delayed a parameter change, do it now, and restart 1490 * output. 1491 * XXX sacom_loadchanelregs() waits TX completion, 1492 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1493 */ 1494 if (sc->sc_heldchange) { 1495 sacom_loadchannelregs(sc); 1496 sc->sc_heldchange = 0; 1497 sc->sc_tbc = sc->sc_heldtbc; 1498 sc->sc_heldtbc = 0; 1499 } 1500 1501 /* Output the next chunk of the contiguous buffer, if any. */ 1502 if (sc->sc_tbc > 0) { 1503 sacom_filltx(sc); 1504 } else { 1505 /* Disable transmit completion interrupts if necessary. */ 1506 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1507 CLR(sc->sc_cr3, CR3_TIE); 1508 bus_space_write_4(iot, ioh, SACOM_CR3, 1509 sc->sc_cr3); 1510 } 1511 if (sc->sc_tx_busy) { 1512 sc->sc_tx_busy = 0; 1513 sc->sc_tx_done = 1; 1514 } 1515 } 1516 } 1517 COM_UNLOCK(sc); 1518 1519 /* Wake up the poller. */ 1520 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1521 softintr_schedule(sc->sc_si); 1522 #else 1523 setsoftserial(); 1524 #endif 1525 1526 #if NRND > 0 && defined(RND_COM) 1527 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1528 #endif 1529 return (1); 1530 } 1531 1532 static void 1533 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1534 1535 /* XXX this should be done at sc->enable function */ 1536 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1537 SAGPIO_PCR, 0xa0000); 1538 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1539 SAGPIO_PSR, 0x100); 1540 } 1541 1542 /* Initialization for serial console */ 1543 int 1544 sacominit(iot, iobase, baud, cflag, iohp) 1545 bus_space_tag_t iot; 1546 bus_addr_t iobase; 1547 int baud; 1548 tcflag_t cflag; 1549 bus_space_handle_t *iohp; 1550 { 1551 int brd, cr0; 1552 1553 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1554 printf("register map failed\n"); 1555 1556 /* wait for the Tx queue to drain and disable the UART */ 1557 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1558 ; 1559 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1560 1561 cr0 = cflag2cr0(cflag); 1562 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1563 1564 brd = SACOMSPEED(baud); 1565 sacomconsrate = baud; 1566 sacomconsaddr = iobase; 1567 sacomconscflag = cflag; 1568 /* XXX assumes little endian */ 1569 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1570 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1571 1572 /* enable the UART */ 1573 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1574 1575 return (0); 1576 } 1577 1578 void 1579 sacomcnprobe(cp) 1580 struct consdev *cp; 1581 { 1582 cp->cn_pri = CN_REMOTE; 1583 } 1584 1585 void 1586 sacomcninit(cp) 1587 struct consdev *cp; 1588 { 1589 if (cp == NULL) { 1590 /* XXX cp == NULL means that MMU is disabled. */ 1591 sacomconsioh = SACOM3_HW_BASE; 1592 sacomconstag = &sa11x0_bs_tag; 1593 cn_tab = &sacomcons; 1594 return; 1595 } 1596 1597 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1598 CONMODE, &sacomconsioh)) 1599 panic("can't init serial console @%x", CONADDR); 1600 cn_tab = &sacomcons; 1601 sacomconstag = &sa11x0_bs_tag; 1602 } 1603 1604 int 1605 sacomcngetc(dev) 1606 dev_t dev; 1607 { 1608 int c, s; 1609 1610 s = spltty(); /* XXX do we need this? */ 1611 1612 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1613 & SR1_RNE)) { 1614 #if defined(DDB) || defined(KGDB) 1615 #ifndef DDB_BREAK_CHAR 1616 u_int sr0; 1617 extern int db_active; 1618 1619 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1620 if (ISSET(sr0, SR0_RBB)) 1621 bus_space_write_4(sacomconstag, sacomconsioh, 1622 SACOM_SR0, SR0_RBB); 1623 if (ISSET(sr0, SR0_REB)) { 1624 bus_space_write_4(sacomconstag, sacomconsioh, 1625 SACOM_SR0, SR0_REB); 1626 if (db_active == 0) 1627 console_debugger(); 1628 } 1629 #endif 1630 #endif /* DDB || KGDB */ 1631 } 1632 1633 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1634 c &= 0xff; 1635 splx(s); 1636 1637 return (c); 1638 } 1639 1640 void 1641 sacomcnputc(dev, c) 1642 dev_t dev; 1643 int c; 1644 { 1645 int s; 1646 1647 s = spltty(); /* XXX do we need this? */ 1648 1649 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1650 & SR1_TNF)) 1651 ; 1652 1653 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1654 splx(s); 1655 } 1656 1657 void 1658 sacomcnpollc(dev, on) 1659 dev_t dev; 1660 int on; 1661 { 1662 1663 } 1664 1665 #ifdef DEBUG 1666 int 1667 sacomcncharpoll() 1668 { 1669 int c; 1670 1671 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1672 & SR1_RNE)) 1673 return -1; 1674 1675 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1676 c &= 0xff; 1677 1678 return (c); 1679 } 1680 1681 #endif 1682 1683 /* helper function to identify the com ports used by 1684 console or KGDB (and not yet autoconf attached) */ 1685 int 1686 sacom_is_console(iot, iobase, ioh) 1687 bus_space_tag_t iot; 1688 bus_addr_t iobase; 1689 bus_space_handle_t *ioh; 1690 { 1691 bus_space_handle_t help; 1692 1693 if (! sacomconsattached && 1694 iot == sacomconstag && iobase == sacomconsaddr) 1695 help = sacomconsioh; 1696 else 1697 return (0); 1698 1699 if (ioh) 1700 *ioh = help; 1701 return (1); 1702 } 1703
Indexes created Thu Oct 02 14:10:14 GMT 2025