sa11x0_com.c revision 1.8
1 /* $NetBSD: sa11x0_com.c,v 1.8 2002/09/27 15:35:49 provos 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 struct cfattach sacom_ca = { 202 sizeof(struct sacom_softc), sacom_match, sacom_attach 203 }; 204 extern struct cfdriver sacom_cd; 205 206 #ifdef hpcarm 207 struct platid_data sacom_platid_table[] = { 208 { &platid_mask_MACH_HP_JORNADA_720, sacom_j720_init }, 209 { &platid_mask_MACH_HP_JORNADA_720JP, sacom_j720_init }, 210 { NULL, NULL } 211 }; 212 #endif 213 214 struct consdev sacomcons = { 215 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 216 NODEV, CN_NORMAL 217 }; 218 219 #ifndef CONMODE 220 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 221 #endif 222 #ifndef CONSPEED 223 #define CONSPEED 9600 224 #endif 225 #ifndef CONADDR 226 #define CONADDR SACOM3_BASE 227 #endif 228 229 static int 230 sacom_match(parent, match, aux) 231 struct device *parent; 232 struct cfdata *match; 233 void *aux; 234 { 235 return (1); 236 } 237 238 void 239 sacom_attach(parent, self, aux) 240 struct device *parent; 241 struct device *self; 242 void *aux; 243 { 244 struct sacom_softc *sc = (struct sacom_softc*)self; 245 struct sa11x0_attach_args *sa = aux; 246 247 #ifdef hpcarm 248 struct platid_data *p; 249 void (*mdinit)(struct device *, struct sacom_softc *); 250 #endif 251 252 printf("\n"); 253 254 sc->sc_iot = sa->sa_iot; 255 sc->sc_baseaddr = sa->sa_addr; 256 257 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 258 &sc->sc_ioh)) { 259 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 260 return; 261 } 262 263 printf("%s: ", sc->sc_dev.dv_xname); 264 switch(sc->sc_baseaddr) { 265 case 0x80050000: 266 printf("SA11x0 UART3\n"); 267 break; 268 case 0x80010000: 269 printf("SA11x0 UART1\n"); 270 break; 271 case 0x80030000: 272 printf("SA11x0 UART2 (IRDA)\n"); 273 break; 274 default: 275 printf("unknown SA11x0 UART\n"); 276 break; 277 } 278 279 sacom_attach_subr(sc); 280 281 #ifdef hpcarm 282 /* Do hpcarm specific initialization, if any */ 283 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 284 mdinit = p->data; 285 (mdinit)(parent, sc); 286 } 287 #endif 288 289 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 290 } 291 292 void 293 sacom_attach_subr(sc) 294 struct sacom_softc *sc; 295 { 296 bus_addr_t iobase = sc->sc_baseaddr; 297 bus_space_tag_t iot = sc->sc_iot; 298 struct tty *tp; 299 300 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 301 simple_lock_init(&sc->sc_lock); 302 #endif 303 304 /* XXX Do we need to disable interrupts here? */ 305 306 if (iot == sacomconstag && iobase == sacomconsaddr) { 307 sacomconsattached = 1; 308 sc->sc_speed = SACOMSPEED(sacomconsrate); 309 310 /* Make sure the console is always "hardwired". */ 311 delay(10000); /* wait for output to finish */ 312 SET(sc->sc_hwflags, COM_HW_CONSOLE); 313 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 314 } 315 316 tp = ttymalloc(); 317 tp->t_oproc = sacomstart; 318 tp->t_param = sacomparam; 319 tp->t_hwiflow = sacomhwiflow; 320 321 sc->sc_tty = tp; 322 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 323 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 324 sc->sc_rbavail = SACOM_RING_SIZE; 325 if (sc->sc_rbuf == NULL) { 326 printf("%s: unable to allocate ring buffer\n", 327 sc->sc_dev.dv_xname); 328 return; 329 } 330 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 331 sc->sc_tbc = 0; 332 333 tty_attach(tp); 334 335 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 336 int maj; 337 338 /* locate the major number */ 339 maj = cdevsw_lookup_major(&sacom_cdevsw); 340 341 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 342 343 delay(10000); /* XXX */ 344 printf("%s: console\n", sc->sc_dev.dv_xname); 345 delay(10000); /* XXX */ 346 } 347 348 349 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 350 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 351 #endif 352 353 #if NRND > 0 && defined(RND_COM) 354 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 355 RND_TYPE_TTY, 0); 356 #endif 357 358 /* if there are no enable/disable functions, assume the device 359 is always enabled */ 360 if (!sc->enable) 361 sc->enabled = 1; 362 363 sacom_config(sc); 364 365 SET(sc->sc_hwflags, COM_HW_DEV_OK); 366 } 367 368 /* This is necessary when dynamically changing SAIP configuration. */ 369 int 370 sacom_detach(self, flags) 371 struct device *self; 372 int flags; 373 { 374 struct sacom_softc *sc = (struct sacom_softc *)self; 375 int maj, mn; 376 377 /* locate the major number */ 378 maj = cdevsw_lookup_major(&sacom_cdevsw); 379 380 /* Nuke the vnodes for any open instances. */ 381 mn = self->dv_unit; 382 vdevgone(maj, mn, mn, VCHR); 383 384 mn |= COMDIALOUT_MASK; 385 vdevgone(maj, mn, mn, VCHR); 386 387 /* Free the receive buffer. */ 388 free(sc->sc_rbuf, M_DEVBUF); 389 390 /* Detach and free the tty. */ 391 tty_detach(sc->sc_tty); 392 ttyfree(sc->sc_tty); 393 394 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 395 /* Unhook the soft interrupt handler. */ 396 softintr_disestablish(sc->sc_si); 397 #endif 398 399 #if NRND > 0 && defined(RND_COM) 400 /* Unhook the entropy source. */ 401 rnd_detach_source(&sc->rnd_source); 402 #endif 403 404 return (0); 405 } 406 407 void 408 sacom_config(sc) 409 struct sacom_softc *sc; 410 { 411 bus_space_tag_t iot = sc->sc_iot; 412 bus_space_handle_t ioh = sc->sc_ioh; 413 414 /* Disable engine before configuring the device. */ 415 sc->sc_cr3 = 0; 416 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 417 418 #ifdef DDB 419 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 420 sacom_enable_debugport(sc); 421 #endif 422 } 423 424 #ifdef DDB 425 static void 426 sacom_enable_debugport(sc) 427 struct sacom_softc *sc; 428 { 429 bus_space_tag_t iot = sc->sc_iot; 430 bus_space_handle_t ioh = sc->sc_ioh; 431 int s; 432 433 s = splserial(); 434 COM_LOCK(sc); 435 sc->sc_cr3 = CR3_RXE | CR3_TXE; 436 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 437 COM_UNLOCK(sc); 438 splx(s); 439 } 440 #endif 441 442 int 443 sacom_activate(self, act) 444 struct device *self; 445 enum devact act; 446 { 447 struct sacom_softc *sc = (struct sacom_softc *)self; 448 int s, rv = 0; 449 450 s = splserial(); 451 COM_LOCK(sc); 452 switch (act) { 453 case DVACT_ACTIVATE: 454 rv = EOPNOTSUPP; 455 break; 456 457 case DVACT_DEACTIVATE: 458 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 459 rv = EBUSY; 460 break; 461 } 462 463 if (sc->disable != NULL && sc->enabled != 0) { 464 (*sc->disable)(sc); 465 sc->enabled = 0; 466 } 467 break; 468 } 469 470 COM_UNLOCK(sc); 471 splx(s); 472 return (rv); 473 } 474 475 void 476 sacom_shutdown(sc) 477 struct sacom_softc *sc; 478 { 479 struct tty *tp = sc->sc_tty; 480 int s; 481 482 s = splserial(); 483 COM_LOCK(sc); 484 485 /* Clear any break condition set with TIOCSBRK. */ 486 sacom_break(sc, 0); 487 488 /* 489 * Hang up if necessary. Wait a bit, so the other side has time to 490 * notice even if we immediately open the port again. 491 * Avoid tsleeping above splhigh(). 492 */ 493 if (ISSET(tp->t_cflag, HUPCL)) { 494 sacom_modem(sc, 0); 495 COM_UNLOCK(sc); 496 splx(s); 497 /* XXX tsleep will only timeout */ 498 (void) tsleep(sc, TTIPRI, ttclos, hz); 499 s = splserial(); 500 COM_LOCK(sc); 501 } 502 503 /* Turn off interrupts. */ 504 sc->sc_cr3 = 0; 505 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 506 507 if (sc->disable) { 508 #ifdef DIAGNOSTIC 509 if (!sc->enabled) 510 panic("sacom_shutdown: not enabled?"); 511 #endif 512 (*sc->disable)(sc); 513 sc->enabled = 0; 514 } 515 COM_UNLOCK(sc); 516 splx(s); 517 } 518 519 int 520 sacomopen(dev, flag, mode, p) 521 dev_t dev; 522 int flag, mode; 523 struct proc *p; 524 { 525 struct sacom_softc *sc; 526 struct tty *tp; 527 int s, s2; 528 int error; 529 530 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 531 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 532 sc->sc_rbuf == NULL) 533 return (ENXIO); 534 535 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 536 return (ENXIO); 537 538 tp = sc->sc_tty; 539 540 if (ISSET(tp->t_state, TS_ISOPEN) && 541 ISSET(tp->t_state, TS_XCLUDE) && 542 p->p_ucred->cr_uid != 0) 543 return (EBUSY); 544 545 s = spltty(); 546 547 /* 548 * Do the following iff this is a first open. 549 */ 550 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 551 struct termios t; 552 553 tp->t_dev = dev; 554 555 s2 = splserial(); 556 COM_LOCK(sc); 557 558 if (sc->enable) { 559 if ((*sc->enable)(sc)) { 560 COM_UNLOCK(sc); 561 splx(s2); 562 splx(s); 563 printf("%s: device enable failed\n", 564 sc->sc_dev.dv_xname); 565 return (EIO); 566 } 567 sc->enabled = 1; 568 sacom_config(sc); 569 } 570 571 /* Turn on interrupts. */ 572 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 573 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 574 sc->sc_cr3); 575 576 577 COM_UNLOCK(sc); 578 splx(s2); 579 580 /* 581 * Initialize the termios status to the defaults. Add in the 582 * sticky bits from TIOCSFLAGS. 583 */ 584 t.c_ispeed = 0; 585 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 586 t.c_ospeed = sacomconsrate; 587 t.c_cflag = sacomconscflag; 588 } else { 589 t.c_ospeed = TTYDEF_SPEED; 590 t.c_cflag = TTYDEF_CFLAG; 591 } 592 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 593 SET(t.c_cflag, CLOCAL); 594 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 595 SET(t.c_cflag, CRTSCTS); 596 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 597 SET(t.c_cflag, MDMBUF); 598 /* Make sure sacomparam() will do something. */ 599 tp->t_ospeed = 0; 600 (void) sacomparam(tp, &t); 601 tp->t_iflag = TTYDEF_IFLAG; 602 tp->t_oflag = TTYDEF_OFLAG; 603 tp->t_lflag = TTYDEF_LFLAG; 604 ttychars(tp); 605 ttsetwater(tp); 606 607 s2 = splserial(); 608 COM_LOCK(sc); 609 610 /* 611 * Turn on DTR. We must always do this, even if carrier is not 612 * present, because otherwise we'd have to use TIOCSDTR 613 * immediately after setting CLOCAL, which applications do not 614 * expect. We always assert DTR while the device is open 615 * unless explicitly requested to deassert it. 616 */ 617 sacom_modem(sc, 1); 618 619 /* Clear the input ring, and unblock. */ 620 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 621 sc->sc_rbavail = SACOM_RING_SIZE; 622 sacom_iflush(sc); 623 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 624 sacom_hwiflow(sc); 625 626 #ifdef COM_DEBUG 627 if (sacom_debug) 628 comstatus(sc, "sacomopen "); 629 #endif 630 631 COM_UNLOCK(sc); 632 splx(s2); 633 } 634 635 splx(s); 636 637 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 638 if (error) 639 goto bad; 640 641 error = (*tp->t_linesw->l_open)(dev, tp); 642 if (error) 643 goto bad; 644 645 return (0); 646 647 bad: 648 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 649 /* 650 * We failed to open the device, and nobody else had it opened. 651 * Clean up the state as appropriate. 652 */ 653 sacom_shutdown(sc); 654 } 655 656 return (error); 657 } 658 659 int 660 sacomclose(dev, flag, mode, p) 661 dev_t dev; 662 int flag, mode; 663 struct proc *p; 664 { 665 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 666 struct tty *tp = sc->sc_tty; 667 668 /* XXX This is for cons.c. */ 669 if (!ISSET(tp->t_state, TS_ISOPEN)) 670 return (0); 671 672 (*tp->t_linesw->l_close)(tp, flag); 673 ttyclose(tp); 674 675 if (COM_ISALIVE(sc) == 0) 676 return (0); 677 678 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 679 /* 680 * Although we got a last close, the device may still be in 681 * use; e.g. if this was the dialout node, and there are still 682 * processes waiting for carrier on the non-dialout node. 683 */ 684 sacom_shutdown(sc); 685 } 686 687 return (0); 688 } 689 690 int 691 sacomread(dev, uio, flag) 692 dev_t dev; 693 struct uio *uio; 694 int flag; 695 { 696 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 697 struct tty *tp = sc->sc_tty; 698 699 if (COM_ISALIVE(sc) == 0) 700 return (EIO); 701 702 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 703 } 704 705 int 706 sacomwrite(dev, uio, flag) 707 dev_t dev; 708 struct uio *uio; 709 int flag; 710 { 711 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 712 struct tty *tp = sc->sc_tty; 713 714 if (COM_ISALIVE(sc) == 0) 715 return (EIO); 716 717 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 718 } 719 720 int 721 sacompoll(dev, events, p) 722 dev_t dev; 723 int events; 724 struct proc *p; 725 { 726 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 727 struct tty *tp = sc->sc_tty; 728 729 if (COM_ISALIVE(sc) == 0) 730 return (EIO); 731 732 return ((*tp->t_linesw->l_poll)(tp, events, p)); 733 } 734 735 struct tty * 736 sacomtty(dev) 737 dev_t dev; 738 { 739 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 740 struct tty *tp = sc->sc_tty; 741 742 return (tp); 743 } 744 745 int 746 sacomioctl(dev, cmd, data, flag, p) 747 dev_t dev; 748 u_long cmd; 749 caddr_t data; 750 int flag; 751 struct proc *p; 752 { 753 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 754 struct tty *tp = sc->sc_tty; 755 int error; 756 int s; 757 758 if (COM_ISALIVE(sc) == 0) 759 return (EIO); 760 761 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 762 if (error != EPASSTHROUGH) 763 return (error); 764 765 error = ttioctl(tp, cmd, data, flag, p); 766 if (error != EPASSTHROUGH) 767 return (error); 768 769 error = 0; 770 771 s = splserial(); 772 COM_LOCK(sc); 773 774 switch (cmd) { 775 case TIOCSBRK: 776 sacom_break(sc, 1); 777 break; 778 779 case TIOCCBRK: 780 sacom_break(sc, 0); 781 break; 782 783 case TIOCSDTR: 784 sacom_modem(sc, 1); 785 break; 786 787 case TIOCCDTR: 788 sacom_modem(sc, 0); 789 break; 790 791 case TIOCGFLAGS: 792 *(int *)data = sc->sc_swflags; 793 break; 794 795 case TIOCSFLAGS: 796 error = suser(p->p_ucred, &p->p_acflag); 797 if (error) 798 break; 799 sc->sc_swflags = *(int *)data; 800 break; 801 802 case TIOCMSET: 803 case TIOCMBIS: 804 case TIOCMBIC: 805 tiocm_to_sacom(sc, cmd, *(int *)data); 806 break; 807 808 case TIOCMGET: 809 *(int *)data = sacom_to_tiocm(sc); 810 break; 811 812 default: 813 error = EPASSTHROUGH; 814 break; 815 } 816 817 COM_UNLOCK(sc); 818 splx(s); 819 820 #ifdef COM_DEBUG 821 if (sacom_debug) 822 comstatus(sc, "comioctl "); 823 #endif 824 825 return (error); 826 } 827 828 static inline void 829 sacom_schedrx(sc) 830 struct sacom_softc *sc; 831 { 832 833 sc->sc_rx_ready = 1; 834 835 /* Wake up the poller. */ 836 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 837 softintr_schedule(sc->sc_si); 838 #else 839 setsoftserial(); 840 #endif 841 } 842 843 void 844 sacom_break(sc, onoff) 845 struct sacom_softc *sc; 846 int onoff; 847 { 848 849 if (onoff) 850 SET(sc->sc_cr3, CR3_BRK); 851 else 852 CLR(sc->sc_cr3, CR3_BRK); 853 854 if (!sc->sc_heldchange) { 855 if (sc->sc_tx_busy) { 856 sc->sc_heldtbc = sc->sc_tbc; 857 sc->sc_tbc = 0; 858 sc->sc_heldchange = 1; 859 } else 860 sacom_loadchannelregs(sc); 861 } 862 } 863 864 void 865 sacom_modem(sc, onoff) 866 struct sacom_softc *sc; 867 int onoff; 868 { 869 if (!sc->sc_heldchange) { 870 if (sc->sc_tx_busy) { 871 sc->sc_heldtbc = sc->sc_tbc; 872 sc->sc_tbc = 0; 873 sc->sc_heldchange = 1; 874 } else 875 sacom_loadchannelregs(sc); 876 } 877 } 878 879 void 880 tiocm_to_sacom(sc, how, ttybits) 881 struct sacom_softc *sc; 882 u_long how; 883 int ttybits; 884 { 885 } 886 887 int 888 sacom_to_tiocm(sc) 889 struct sacom_softc *sc; 890 { 891 int ttybits = 0; 892 893 if (sc->sc_cr3 != 0) 894 SET(ttybits, TIOCM_LE); 895 896 return (ttybits); 897 } 898 899 static u_int 900 cflag2cr0(cflag) 901 tcflag_t cflag; 902 { 903 u_int cr0; 904 905 cr0 = (cflag & PARENB) ? CR0_PE : 0; 906 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 907 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 908 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 909 910 return (cr0); 911 } 912 913 int 914 sacomparam(tp, t) 915 struct tty *tp; 916 struct termios *t; 917 { 918 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 919 int ospeed = SACOMSPEED(t->c_ospeed); 920 u_int cr0; 921 int s; 922 923 if (COM_ISALIVE(sc) == 0) 924 return (EIO); 925 926 /* Check requested parameters. */ 927 if (ospeed < 0) 928 return (EINVAL); 929 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 930 return (EINVAL); 931 932 /* 933 * For the console, always force CLOCAL and !HUPCL, so that the port 934 * is always active. 935 */ 936 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 937 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 938 SET(t->c_cflag, CLOCAL); 939 CLR(t->c_cflag, HUPCL); 940 } 941 942 /* 943 * If there were no changes, don't do anything. This avoids dropping 944 * input and improves performance when all we did was frob things like 945 * VMIN and VTIME. 946 */ 947 if (tp->t_ospeed == t->c_ospeed && 948 tp->t_cflag == t->c_cflag) 949 return (0); 950 951 cr0 = cflag2cr0(t->c_cflag); 952 953 s = splserial(); 954 COM_LOCK(sc); 955 956 sc->sc_cr0 = cr0; 957 958 sc->sc_speed = ospeed; 959 960 /* And copy to tty. */ 961 tp->t_ispeed = 0; 962 tp->t_ospeed = t->c_ospeed; 963 tp->t_cflag = t->c_cflag; 964 965 if (!sc->sc_heldchange) { 966 if (sc->sc_tx_busy) { 967 sc->sc_heldtbc = sc->sc_tbc; 968 sc->sc_tbc = 0; 969 sc->sc_heldchange = 1; 970 } else 971 sacom_loadchannelregs(sc); 972 } 973 974 if (!ISSET(t->c_cflag, CHWFLOW)) { 975 /* Disable the high water mark. */ 976 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 977 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 978 sacom_schedrx(sc); 979 } 980 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 981 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 982 sacom_hwiflow(sc); 983 } 984 } 985 986 COM_UNLOCK(sc); 987 splx(s); 988 989 (void) (*tp->t_linesw->l_modem)(tp, 1); 990 991 #ifdef COM_DEBUG 992 if (sacom_debug) 993 comstatus(sc, "comparam "); 994 #endif 995 996 return (0); 997 } 998 999 void 1000 sacom_iflush(sc) 1001 struct sacom_softc *sc; 1002 { 1003 bus_space_tag_t iot = sc->sc_iot; 1004 bus_space_handle_t ioh = sc->sc_ioh; 1005 #ifdef DIAGNOSTIC 1006 int reg; 1007 #endif 1008 int timo; 1009 1010 #ifdef DIAGNOSTIC 1011 reg = 0xffff; 1012 #endif 1013 timo = 50; 1014 /* flush any pending I/O */ 1015 if (sc->sc_cr3 & CR3_RXE) { 1016 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1017 && --timo) 1018 #ifdef DIAGNOSTIC 1019 reg = 1020 #else 1021 (void) 1022 #endif 1023 bus_space_read_4(iot, ioh, SACOM_DR); 1024 } 1025 #if 0 1026 /* XXX is it good idea to wait TX finish? */ 1027 if (sc->sc_cr3 & CR3_TXE) { 1028 timo = 500; 1029 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1030 && --timo) 1031 delay(100); 1032 } 1033 #endif 1034 #ifdef DIAGNOSTIC 1035 if (!timo) 1036 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1037 reg); 1038 #endif 1039 } 1040 1041 void 1042 sacom_loadchannelregs(sc) 1043 struct sacom_softc *sc; 1044 { 1045 bus_space_tag_t iot = sc->sc_iot; 1046 bus_space_handle_t ioh = sc->sc_ioh; 1047 1048 /* XXXXX necessary? */ 1049 sacom_iflush(sc); 1050 1051 /* Need to stop engines first. */ 1052 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1053 1054 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1055 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1056 1057 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1058 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1059 } 1060 1061 int 1062 sacomhwiflow(tp, block) 1063 struct tty *tp; 1064 int block; 1065 { 1066 #if 0 1067 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1068 int s; 1069 1070 if (COM_ISALIVE(sc) == 0) 1071 return (0); 1072 1073 if (sc->sc_mcr_rts == 0) 1074 return (0); 1075 1076 s = splserial(); 1077 COM_LOCK(sc); 1078 1079 if (block) { 1080 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1081 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1082 sacom_hwiflow(sc); 1083 } 1084 } else { 1085 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1086 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1087 sacom_schedrx(sc); 1088 } 1089 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1090 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1091 sacom_hwiflow(sc); 1092 } 1093 } 1094 1095 COM_UNLOCK(sc); 1096 splx(s); 1097 #endif 1098 return (1); 1099 } 1100 1101 /* 1102 * (un)block input via hw flowcontrol 1103 */ 1104 void 1105 sacom_hwiflow(sc) 1106 struct sacom_softc *sc; 1107 { 1108 #if 0 1109 bus_space_tag_t iot = sc->sc_iot; 1110 bus_space_handle_t ioh = sc->sc_ioh; 1111 1112 /* XXX implement */ 1113 #endif 1114 } 1115 1116 1117 void 1118 sacomstart(tp) 1119 struct tty *tp; 1120 { 1121 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1122 bus_space_tag_t iot = sc->sc_iot; 1123 bus_space_handle_t ioh = sc->sc_ioh; 1124 int s; 1125 1126 if (COM_ISALIVE(sc) == 0) 1127 return; 1128 1129 s = spltty(); 1130 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1131 goto out; 1132 1133 if (tp->t_outq.c_cc <= tp->t_lowat) { 1134 if (ISSET(tp->t_state, TS_ASLEEP)) { 1135 CLR(tp->t_state, TS_ASLEEP); 1136 wakeup(&tp->t_outq); 1137 } 1138 selwakeup(&tp->t_wsel); 1139 if (tp->t_outq.c_cc == 0) 1140 goto out; 1141 } 1142 1143 /* Grab the first contiguous region of buffer space. */ 1144 { 1145 u_char *tba; 1146 int tbc; 1147 1148 tba = tp->t_outq.c_cf; 1149 tbc = ndqb(&tp->t_outq, 0); 1150 1151 (void)splserial(); 1152 COM_LOCK(sc); 1153 1154 sc->sc_tba = tba; 1155 sc->sc_tbc = tbc; 1156 } 1157 1158 SET(tp->t_state, TS_BUSY); 1159 sc->sc_tx_busy = 1; 1160 1161 /* Enable transmit completion interrupts if necessary. */ 1162 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1163 SET(sc->sc_cr3, CR3_TIE); 1164 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1165 } 1166 1167 /* Output the first chunk of the contiguous buffer. */ 1168 sacom_filltx(sc); 1169 1170 COM_UNLOCK(sc); 1171 out: 1172 splx(s); 1173 return; 1174 } 1175 1176 void 1177 sacom_filltx(sc) 1178 struct sacom_softc *sc; 1179 { 1180 bus_space_tag_t iot = sc->sc_iot; 1181 bus_space_handle_t ioh = sc->sc_ioh; 1182 int c, n; 1183 1184 n = 0; 1185 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1186 & SR1_TNF) { 1187 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1188 break; 1189 c = *(sc->sc_tba + n); 1190 c &= 0xff; 1191 bus_space_write_4(iot, ioh, SACOM_DR, c); 1192 n++; 1193 } 1194 sc->sc_tbc -= n; 1195 sc->sc_tba += n; 1196 } 1197 1198 /* 1199 * Stop output on a line. 1200 */ 1201 void 1202 sacomstop(tp, flag) 1203 struct tty *tp; 1204 int flag; 1205 { 1206 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1207 int s; 1208 1209 s = splserial(); 1210 COM_LOCK(sc); 1211 if (ISSET(tp->t_state, TS_BUSY)) { 1212 /* Stop transmitting at the next chunk. */ 1213 sc->sc_tbc = 0; 1214 sc->sc_heldtbc = 0; 1215 if (!ISSET(tp->t_state, TS_TTSTOP)) 1216 SET(tp->t_state, TS_FLUSH); 1217 } 1218 COM_UNLOCK(sc); 1219 splx(s); 1220 } 1221 1222 static inline void 1223 sacom_rxsoft(sc, tp) 1224 struct sacom_softc *sc; 1225 struct tty *tp; 1226 { 1227 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1228 u_char *get, *end; 1229 u_int cc, scc; 1230 u_char sr1; 1231 int code; 1232 int s; 1233 1234 end = sc->sc_ebuf; 1235 get = sc->sc_rbget; 1236 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1237 1238 while (cc) { 1239 code = get[0]; 1240 sr1 = get[1]; 1241 if (ISSET(sr1, SR1_FRE)) 1242 SET(code, TTY_FE); 1243 if (ISSET(sr1, SR1_PRE)) 1244 SET(code, TTY_PE); 1245 if ((*rint)(code, tp) == -1) { 1246 /* 1247 * The line discipline's buffer is out of space. 1248 */ 1249 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1250 /* 1251 * We're either not using flow control, or the 1252 * line discipline didn't tell us to block for 1253 * some reason. Either way, we have no way to 1254 * know when there's more space available, so 1255 * just drop the rest of the data. 1256 */ 1257 get += cc << 1; 1258 if (get >= end) 1259 get -= SACOM_RING_SIZE << 1; 1260 cc = 0; 1261 } else { 1262 /* 1263 * Don't schedule any more receive processing 1264 * until the line discipline tells us there's 1265 * space available (through comhwiflow()). 1266 * Leave the rest of the data in the input 1267 * buffer. 1268 */ 1269 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1270 } 1271 break; 1272 } 1273 get += 2; 1274 if (get >= end) 1275 get = sc->sc_rbuf; 1276 cc--; 1277 } 1278 1279 if (cc != scc) { 1280 sc->sc_rbget = get; 1281 s = splserial(); 1282 COM_LOCK(sc); 1283 1284 cc = sc->sc_rbavail += scc - cc; 1285 /* Buffers should be ok again, release possible block. */ 1286 if (cc >= 1) { 1287 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1288 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1289 SET(sc->sc_cr3, CR3_RIE); 1290 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1291 SACOM_CR3, sc->sc_cr3); 1292 } 1293 } 1294 COM_UNLOCK(sc); 1295 splx(s); 1296 } 1297 } 1298 1299 static inline void 1300 sacom_txsoft(sc, tp) 1301 struct sacom_softc *sc; 1302 struct tty *tp; 1303 { 1304 1305 CLR(tp->t_state, TS_BUSY); 1306 if (ISSET(tp->t_state, TS_FLUSH)) 1307 CLR(tp->t_state, TS_FLUSH); 1308 else 1309 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1310 (*tp->t_linesw->l_start)(tp); 1311 } 1312 1313 static inline void 1314 sacom_stsoft(sc, tp) 1315 struct sacom_softc *sc; 1316 struct tty *tp; 1317 { 1318 } 1319 1320 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1321 void 1322 sacomsoft(arg) 1323 void *arg; 1324 { 1325 struct sacom_softc *sc = arg; 1326 struct tty *tp; 1327 1328 if (COM_ISALIVE(sc) == 0) 1329 return; 1330 1331 { 1332 #else 1333 void 1334 sacomsoft() 1335 { 1336 struct sacom_softc *sc; 1337 struct tty *tp; 1338 int unit; 1339 1340 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1341 sc = device_lookup(&sacom_cd, unit); 1342 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1343 continue; 1344 1345 if (COM_ISALIVE(sc) == 0) 1346 continue; 1347 1348 tp = sc->sc_tty; 1349 if (tp == NULL) 1350 continue; 1351 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1352 continue; 1353 #endif 1354 tp = sc->sc_tty; 1355 1356 if (sc->sc_rx_ready) { 1357 sc->sc_rx_ready = 0; 1358 sacom_rxsoft(sc, tp); 1359 } 1360 1361 if (sc->sc_st_check) { 1362 sc->sc_st_check = 0; 1363 sacom_stsoft(sc, tp); 1364 } 1365 1366 if (sc->sc_tx_done) { 1367 sc->sc_tx_done = 0; 1368 sacom_txsoft(sc, tp); 1369 } 1370 } 1371 1372 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1373 #endif 1374 } 1375 1376 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1377 /* there has got to be a better way to do comsoft() */ 1378 }} 1379 #endif 1380 1381 int 1382 sacomintr(arg) 1383 void *arg; 1384 { 1385 struct sacom_softc *sc = arg; 1386 bus_space_tag_t iot = sc->sc_iot; 1387 bus_space_handle_t ioh = sc->sc_ioh; 1388 u_char *put, *end; 1389 u_int cc; 1390 u_int sr0, sr1; 1391 1392 if (COM_ISALIVE(sc) == 0) 1393 return (0); 1394 1395 COM_LOCK(sc); 1396 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1397 if (! sr0) { 1398 COM_UNLOCK(sc); 1399 return (0); 1400 } 1401 if (ISSET(sr0, SR0_EIF)) 1402 /* XXX silently discard error bits */ 1403 bus_space_read_4(iot, ioh, SACOM_DR); 1404 if (ISSET(sr0, SR0_RBB)) 1405 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1406 if (ISSET(sr0, SR0_REB)) { 1407 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1408 #if defined(DDB) || defined(KGDB) 1409 #ifndef DDB_BREAK_CHAR 1410 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1411 console_debugger(); 1412 } 1413 #endif 1414 #endif /* DDB || KGDB */ 1415 } 1416 1417 1418 end = sc->sc_ebuf; 1419 put = sc->sc_rbput; 1420 cc = sc->sc_rbavail; 1421 1422 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1423 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1424 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1425 while (cc > 0) { 1426 if (!ISSET(sr1, SR1_RNE)) { 1427 bus_space_write_4(iot, ioh, SACOM_SR0, 1428 SR0_RID); 1429 break; 1430 } 1431 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1432 put[1] = sr1; 1433 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1434 if (put[0] == DDB_BREAK_CHAR && 1435 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1436 console_debugger(); 1437 1438 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1439 continue; 1440 } 1441 #endif 1442 put += 2; 1443 if (put >= end) 1444 put = sc->sc_rbuf; 1445 cc--; 1446 1447 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1448 } 1449 1450 /* 1451 * Current string of incoming characters ended because 1452 * no more data was available or we ran out of space. 1453 * Schedule a receive event if any data was received. 1454 * If we're out of space, turn off receive interrupts. 1455 */ 1456 sc->sc_rbput = put; 1457 sc->sc_rbavail = cc; 1458 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1459 sc->sc_rx_ready = 1; 1460 1461 /* XXX do RX hardware flow control */ 1462 1463 /* 1464 * If we're out of space, disable receive interrupts 1465 * until the queue has drained a bit. 1466 */ 1467 if (!cc) { 1468 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1469 CLR(sc->sc_cr3, CR3_RIE); 1470 bus_space_write_4(iot, ioh, SACOM_CR3, 1471 sc->sc_cr3); 1472 } 1473 } else { 1474 #ifdef DIAGNOSTIC 1475 panic("sacomintr: we shouldn't reach here"); 1476 #endif 1477 CLR(sc->sc_cr3, CR3_RIE); 1478 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1479 } 1480 } 1481 1482 /* 1483 * Done handling any receive interrupts. See if data can be 1484 * transmitted as well. Schedule tx done event if no data left 1485 * and tty was marked busy. 1486 */ 1487 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1488 if (ISSET(sr0, SR0_TFS)) { 1489 /* 1490 * If we've delayed a parameter change, do it now, and restart 1491 * output. 1492 * XXX sacom_loadchanelregs() waits TX completion, 1493 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1494 */ 1495 if (sc->sc_heldchange) { 1496 sacom_loadchannelregs(sc); 1497 sc->sc_heldchange = 0; 1498 sc->sc_tbc = sc->sc_heldtbc; 1499 sc->sc_heldtbc = 0; 1500 } 1501 1502 /* Output the next chunk of the contiguous buffer, if any. */ 1503 if (sc->sc_tbc > 0) { 1504 sacom_filltx(sc); 1505 } else { 1506 /* Disable transmit completion interrupts if necessary. */ 1507 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1508 CLR(sc->sc_cr3, CR3_TIE); 1509 bus_space_write_4(iot, ioh, SACOM_CR3, 1510 sc->sc_cr3); 1511 } 1512 if (sc->sc_tx_busy) { 1513 sc->sc_tx_busy = 0; 1514 sc->sc_tx_done = 1; 1515 } 1516 } 1517 } 1518 COM_UNLOCK(sc); 1519 1520 /* Wake up the poller. */ 1521 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1522 softintr_schedule(sc->sc_si); 1523 #else 1524 setsoftserial(); 1525 #endif 1526 1527 #if NRND > 0 && defined(RND_COM) 1528 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1529 #endif 1530 return (1); 1531 } 1532 1533 static void 1534 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1535 1536 /* XXX this should be done at sc->enable function */ 1537 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1538 SAGPIO_PCR, 0xa0000); 1539 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1540 SAGPIO_PSR, 0x100); 1541 } 1542 1543 /* Initialization for serial console */ 1544 int 1545 sacominit(iot, iobase, baud, cflag, iohp) 1546 bus_space_tag_t iot; 1547 bus_addr_t iobase; 1548 int baud; 1549 tcflag_t cflag; 1550 bus_space_handle_t *iohp; 1551 { 1552 int brd, cr0; 1553 1554 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1555 printf("register map failed\n"); 1556 1557 /* wait for the Tx queue to drain and disable the UART */ 1558 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1559 ; 1560 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1561 1562 cr0 = cflag2cr0(cflag); 1563 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1564 1565 brd = SACOMSPEED(baud); 1566 sacomconsrate = baud; 1567 sacomconsaddr = iobase; 1568 sacomconscflag = cflag; 1569 /* XXX assumes little endian */ 1570 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1571 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1572 1573 /* enable the UART */ 1574 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1575 1576 return (0); 1577 } 1578 1579 void 1580 sacomcnprobe(cp) 1581 struct consdev *cp; 1582 { 1583 cp->cn_pri = CN_REMOTE; 1584 } 1585 1586 void 1587 sacomcninit(cp) 1588 struct consdev *cp; 1589 { 1590 if (cp == NULL) { 1591 /* XXX cp == NULL means that MMU is disabled. */ 1592 sacomconsioh = SACOM3_HW_BASE; 1593 sacomconstag = &sa11x0_bs_tag; 1594 cn_tab = &sacomcons; 1595 return; 1596 } 1597 1598 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1599 CONMODE, &sacomconsioh)) 1600 panic("can't init serial console @%x", CONADDR); 1601 cn_tab = &sacomcons; 1602 sacomconstag = &sa11x0_bs_tag; 1603 } 1604 1605 int 1606 sacomcngetc(dev) 1607 dev_t dev; 1608 { 1609 int c, s; 1610 1611 s = spltty(); /* XXX do we need this? */ 1612 1613 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1614 & SR1_RNE)) { 1615 #if defined(DDB) || defined(KGDB) 1616 #ifndef DDB_BREAK_CHAR 1617 u_int sr0; 1618 extern int db_active; 1619 1620 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1621 if (ISSET(sr0, SR0_RBB)) 1622 bus_space_write_4(sacomconstag, sacomconsioh, 1623 SACOM_SR0, SR0_RBB); 1624 if (ISSET(sr0, SR0_REB)) { 1625 bus_space_write_4(sacomconstag, sacomconsioh, 1626 SACOM_SR0, SR0_REB); 1627 if (db_active == 0) 1628 console_debugger(); 1629 } 1630 #endif 1631 #endif /* DDB || KGDB */ 1632 } 1633 1634 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1635 c &= 0xff; 1636 splx(s); 1637 1638 return (c); 1639 } 1640 1641 void 1642 sacomcnputc(dev, c) 1643 dev_t dev; 1644 int c; 1645 { 1646 int s; 1647 1648 s = spltty(); /* XXX do we need this? */ 1649 1650 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1651 & SR1_TNF)) 1652 ; 1653 1654 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1655 splx(s); 1656 } 1657 1658 void 1659 sacomcnpollc(dev, on) 1660 dev_t dev; 1661 int on; 1662 { 1663 1664 } 1665 1666 #ifdef DEBUG 1667 int 1668 sacomcncharpoll() 1669 { 1670 int c; 1671 1672 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1673 & SR1_RNE)) 1674 return -1; 1675 1676 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1677 c &= 0xff; 1678 1679 return (c); 1680 } 1681 1682 #endif 1683 1684 /* helper function to identify the com ports used by 1685 console or KGDB (and not yet autoconf attached) */ 1686 int 1687 sacom_is_console(iot, iobase, ioh) 1688 bus_space_tag_t iot; 1689 bus_addr_t iobase; 1690 bus_space_handle_t *ioh; 1691 { 1692 bus_space_handle_t help; 1693 1694 if (! sacomconsattached && 1695 iot == sacomconstag && iobase == sacomconsaddr) 1696 help = sacomconsioh; 1697 else 1698 return (0); 1699 1700 if (ioh) 1701 *ioh = help; 1702 return (1); 1703 } 1704
Indexes created Thu Oct 02 10:09:58 GMT 2025