sa11x0_com.c revision 1.22
1 /* $NetBSD: sa11x0_com.c,v 1.22 2005/10/23 15:30:02 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 1.22 2005/10/23 15:30:02 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 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 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_720, sacom_j720_init }, 217 { &platid_mask_MACH_HP_JORNADA_720JP, sacom_j720_init }, 218 { NULL, NULL } 219 }; 220 #endif 221 222 struct consdev sacomcons = { 223 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 224 NULL, NULL, NODEV, CN_NORMAL 225 }; 226 227 #ifndef CONMODE 228 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 229 #endif 230 #ifndef CONSPEED 231 #define CONSPEED 9600 232 #endif 233 #ifndef CONADDR 234 #define CONADDR SACOM3_BASE 235 #endif 236 237 static int 238 sacom_match(parent, match, aux) 239 struct device *parent; 240 struct cfdata *match; 241 void *aux; 242 { 243 return (1); 244 } 245 246 void 247 sacom_attach(parent, self, aux) 248 struct device *parent; 249 struct device *self; 250 void *aux; 251 { 252 struct sacom_softc *sc = (struct sacom_softc*)self; 253 struct sa11x0_attach_args *sa = aux; 254 255 #ifdef hpcarm 256 struct platid_data *p; 257 void (*mdinit)(struct device *, struct sacom_softc *); 258 #endif 259 260 printf("\n"); 261 262 sc->sc_iot = sa->sa_iot; 263 sc->sc_baseaddr = sa->sa_addr; 264 265 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 266 &sc->sc_ioh)) { 267 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 268 return; 269 } 270 271 printf("%s: ", sc->sc_dev.dv_xname); 272 switch(sc->sc_baseaddr) { 273 case 0x80050000: 274 printf("SA11x0 UART3\n"); 275 break; 276 case 0x80010000: 277 printf("SA11x0 UART1\n"); 278 break; 279 case 0x80030000: 280 printf("SA11x0 UART2 (IRDA)\n"); 281 break; 282 default: 283 printf("unknown SA11x0 UART\n"); 284 break; 285 } 286 287 sacom_attach_subr(sc); 288 289 #ifdef hpcarm 290 /* Do hpcarm specific initialization, if any */ 291 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 292 mdinit = p->data; 293 (mdinit)(parent, sc); 294 } 295 #endif 296 297 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 298 } 299 300 void 301 sacom_attach_subr(sc) 302 struct sacom_softc *sc; 303 { 304 bus_addr_t iobase = sc->sc_baseaddr; 305 bus_space_tag_t iot = sc->sc_iot; 306 struct tty *tp; 307 308 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 309 simple_lock_init(&sc->sc_lock); 310 #endif 311 312 /* XXX Do we need to disable interrupts here? */ 313 314 if (iot == sacomconstag && iobase == sacomconsaddr) { 315 sacomconsattached = 1; 316 sc->sc_speed = SACOMSPEED(sacomconsrate); 317 318 /* Make sure the console is always "hardwired". */ 319 delay(10000); /* wait for output to finish */ 320 SET(sc->sc_hwflags, COM_HW_CONSOLE); 321 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 322 } 323 324 tp = ttymalloc(); 325 tp->t_oproc = sacomstart; 326 tp->t_param = sacomparam; 327 tp->t_hwiflow = sacomhwiflow; 328 329 sc->sc_tty = tp; 330 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 331 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 332 sc->sc_rbavail = SACOM_RING_SIZE; 333 if (sc->sc_rbuf == NULL) { 334 printf("%s: unable to allocate ring buffer\n", 335 sc->sc_dev.dv_xname); 336 return; 337 } 338 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 339 sc->sc_tbc = 0; 340 341 tty_attach(tp); 342 343 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 344 int maj; 345 346 /* locate the major number */ 347 maj = cdevsw_lookup_major(&sacom_cdevsw); 348 349 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 350 351 delay(10000); /* XXX */ 352 printf("%s: console\n", sc->sc_dev.dv_xname); 353 delay(10000); /* XXX */ 354 } 355 356 357 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 358 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 359 #endif 360 361 #if NRND > 0 && defined(RND_COM) 362 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 363 RND_TYPE_TTY, 0); 364 #endif 365 366 /* if there are no enable/disable functions, assume the device 367 is always enabled */ 368 if (!sc->enable) 369 sc->enabled = 1; 370 371 sacom_config(sc); 372 373 SET(sc->sc_hwflags, COM_HW_DEV_OK); 374 } 375 376 /* This is necessary when dynamically changing SAIP configuration. */ 377 int 378 sacom_detach(self, flags) 379 struct device *self; 380 int flags; 381 { 382 struct sacom_softc *sc = (struct sacom_softc *)self; 383 int maj, mn; 384 385 /* locate the major number */ 386 maj = cdevsw_lookup_major(&sacom_cdevsw); 387 388 /* Nuke the vnodes for any open instances. */ 389 mn = self->dv_unit; 390 vdevgone(maj, mn, mn, VCHR); 391 392 mn |= COMDIALOUT_MASK; 393 vdevgone(maj, mn, mn, VCHR); 394 395 /* Free the receive buffer. */ 396 free(sc->sc_rbuf, M_DEVBUF); 397 398 /* Detach and free the tty. */ 399 tty_detach(sc->sc_tty); 400 ttyfree(sc->sc_tty); 401 402 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 403 /* Unhook the soft interrupt handler. */ 404 softintr_disestablish(sc->sc_si); 405 #endif 406 407 #if NRND > 0 && defined(RND_COM) 408 /* Unhook the entropy source. */ 409 rnd_detach_source(&sc->rnd_source); 410 #endif 411 412 return (0); 413 } 414 415 void 416 sacom_config(sc) 417 struct sacom_softc *sc; 418 { 419 bus_space_tag_t iot = sc->sc_iot; 420 bus_space_handle_t ioh = sc->sc_ioh; 421 422 /* Disable engine before configuring the device. */ 423 sc->sc_cr3 = 0; 424 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 425 426 #ifdef DDB 427 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 428 sacom_enable_debugport(sc); 429 #endif 430 } 431 432 #ifdef DDB 433 static void 434 sacom_enable_debugport(sc) 435 struct sacom_softc *sc; 436 { 437 bus_space_tag_t iot = sc->sc_iot; 438 bus_space_handle_t ioh = sc->sc_ioh; 439 int s; 440 441 s = splserial(); 442 COM_LOCK(sc); 443 sc->sc_cr3 = CR3_RXE | CR3_TXE; 444 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 445 COM_UNLOCK(sc); 446 splx(s); 447 } 448 #endif 449 450 int 451 sacom_activate(self, act) 452 struct device *self; 453 enum devact act; 454 { 455 struct sacom_softc *sc = (struct sacom_softc *)self; 456 int s, rv = 0; 457 458 s = splserial(); 459 COM_LOCK(sc); 460 switch (act) { 461 case DVACT_ACTIVATE: 462 rv = EOPNOTSUPP; 463 break; 464 465 case DVACT_DEACTIVATE: 466 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 467 rv = EBUSY; 468 break; 469 } 470 471 if (sc->disable != NULL && sc->enabled != 0) { 472 (*sc->disable)(sc); 473 sc->enabled = 0; 474 } 475 break; 476 } 477 478 COM_UNLOCK(sc); 479 splx(s); 480 return (rv); 481 } 482 483 void 484 sacom_shutdown(sc) 485 struct sacom_softc *sc; 486 { 487 struct tty *tp = sc->sc_tty; 488 int s; 489 490 s = splserial(); 491 COM_LOCK(sc); 492 493 /* Clear any break condition set with TIOCSBRK. */ 494 sacom_break(sc, 0); 495 496 /* 497 * Hang up if necessary. Wait a bit, so the other side has time to 498 * notice even if we immediately open the port again. 499 * Avoid tsleeping above splhigh(). 500 */ 501 if (ISSET(tp->t_cflag, HUPCL)) { 502 sacom_modem(sc, 0); 503 COM_UNLOCK(sc); 504 splx(s); 505 /* XXX tsleep will only timeout */ 506 (void) tsleep(sc, TTIPRI, ttclos, hz); 507 s = splserial(); 508 COM_LOCK(sc); 509 } 510 511 /* Turn off interrupts. */ 512 sc->sc_cr3 = 0; 513 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 514 515 if (sc->disable) { 516 #ifdef DIAGNOSTIC 517 if (!sc->enabled) 518 panic("sacom_shutdown: not enabled?"); 519 #endif 520 (*sc->disable)(sc); 521 sc->enabled = 0; 522 } 523 COM_UNLOCK(sc); 524 splx(s); 525 } 526 527 int 528 sacomopen(dev, flag, mode, p) 529 dev_t dev; 530 int flag, mode; 531 struct proc *p; 532 { 533 struct sacom_softc *sc; 534 struct tty *tp; 535 int s, s2; 536 int error; 537 538 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 539 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 540 sc->sc_rbuf == NULL) 541 return (ENXIO); 542 543 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 544 return (ENXIO); 545 546 tp = sc->sc_tty; 547 548 if (ISSET(tp->t_state, TS_ISOPEN) && 549 ISSET(tp->t_state, TS_XCLUDE) && 550 suser(p->p_ucred, &p->p_acflag) != 0) 551 return (EBUSY); 552 553 s = spltty(); 554 555 /* 556 * Do the following iff this is a first open. 557 */ 558 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 559 struct termios t; 560 561 tp->t_dev = dev; 562 563 s2 = splserial(); 564 COM_LOCK(sc); 565 566 if (sc->enable) { 567 if ((*sc->enable)(sc)) { 568 COM_UNLOCK(sc); 569 splx(s2); 570 splx(s); 571 printf("%s: device enable failed\n", 572 sc->sc_dev.dv_xname); 573 return (EIO); 574 } 575 sc->enabled = 1; 576 sacom_config(sc); 577 } 578 579 /* Turn on interrupts. */ 580 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 581 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 582 sc->sc_cr3); 583 584 585 COM_UNLOCK(sc); 586 splx(s2); 587 588 /* 589 * Initialize the termios status to the defaults. Add in the 590 * sticky bits from TIOCSFLAGS. 591 */ 592 t.c_ispeed = 0; 593 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 594 t.c_ospeed = sacomconsrate; 595 t.c_cflag = sacomconscflag; 596 } else { 597 t.c_ospeed = TTYDEF_SPEED; 598 t.c_cflag = TTYDEF_CFLAG; 599 } 600 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 601 SET(t.c_cflag, CLOCAL); 602 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 603 SET(t.c_cflag, CRTSCTS); 604 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 605 SET(t.c_cflag, MDMBUF); 606 /* Make sure sacomparam() will do something. */ 607 tp->t_ospeed = 0; 608 (void) sacomparam(tp, &t); 609 tp->t_iflag = TTYDEF_IFLAG; 610 tp->t_oflag = TTYDEF_OFLAG; 611 tp->t_lflag = TTYDEF_LFLAG; 612 ttychars(tp); 613 ttsetwater(tp); 614 615 s2 = splserial(); 616 COM_LOCK(sc); 617 618 /* 619 * Turn on DTR. We must always do this, even if carrier is not 620 * present, because otherwise we'd have to use TIOCSDTR 621 * immediately after setting CLOCAL, which applications do not 622 * expect. We always assert DTR while the device is open 623 * unless explicitly requested to deassert it. 624 */ 625 sacom_modem(sc, 1); 626 627 /* Clear the input ring, and unblock. */ 628 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 629 sc->sc_rbavail = SACOM_RING_SIZE; 630 sacom_iflush(sc); 631 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 632 sacom_hwiflow(sc); 633 634 #ifdef COM_DEBUG 635 if (sacom_debug) 636 comstatus(sc, "sacomopen "); 637 #endif 638 639 COM_UNLOCK(sc); 640 splx(s2); 641 } 642 643 splx(s); 644 645 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 646 if (error) 647 goto bad; 648 649 error = (*tp->t_linesw->l_open)(dev, tp); 650 if (error) 651 goto bad; 652 653 return (0); 654 655 bad: 656 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 657 /* 658 * We failed to open the device, and nobody else had it opened. 659 * Clean up the state as appropriate. 660 */ 661 sacom_shutdown(sc); 662 } 663 664 return (error); 665 } 666 667 int 668 sacomclose(dev, flag, mode, p) 669 dev_t dev; 670 int flag, mode; 671 struct proc *p; 672 { 673 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 674 struct tty *tp = sc->sc_tty; 675 676 /* XXX This is for cons.c. */ 677 if (!ISSET(tp->t_state, TS_ISOPEN)) 678 return (0); 679 680 (*tp->t_linesw->l_close)(tp, flag); 681 ttyclose(tp); 682 683 if (COM_ISALIVE(sc) == 0) 684 return (0); 685 686 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 687 /* 688 * Although we got a last close, the device may still be in 689 * use; e.g. if this was the dialout node, and there are still 690 * processes waiting for carrier on the non-dialout node. 691 */ 692 sacom_shutdown(sc); 693 } 694 695 return (0); 696 } 697 698 int 699 sacomread(dev, uio, flag) 700 dev_t dev; 701 struct uio *uio; 702 int flag; 703 { 704 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 705 struct tty *tp = sc->sc_tty; 706 707 if (COM_ISALIVE(sc) == 0) 708 return (EIO); 709 710 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 711 } 712 713 int 714 sacomwrite(dev, uio, flag) 715 dev_t dev; 716 struct uio *uio; 717 int flag; 718 { 719 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 720 struct tty *tp = sc->sc_tty; 721 722 if (COM_ISALIVE(sc) == 0) 723 return (EIO); 724 725 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 726 } 727 728 int 729 sacompoll(dev, events, p) 730 dev_t dev; 731 int events; 732 struct proc *p; 733 { 734 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 735 struct tty *tp = sc->sc_tty; 736 737 if (COM_ISALIVE(sc) == 0) 738 return (EIO); 739 740 return ((*tp->t_linesw->l_poll)(tp, events, p)); 741 } 742 743 struct tty * 744 sacomtty(dev) 745 dev_t dev; 746 { 747 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 748 struct tty *tp = sc->sc_tty; 749 750 return (tp); 751 } 752 753 int 754 sacomioctl(dev, cmd, data, flag, p) 755 dev_t dev; 756 u_long cmd; 757 caddr_t data; 758 int flag; 759 struct proc *p; 760 { 761 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 762 struct tty *tp = sc->sc_tty; 763 int error; 764 int s; 765 766 if (COM_ISALIVE(sc) == 0) 767 return (EIO); 768 769 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 770 if (error != EPASSTHROUGH) 771 return (error); 772 773 error = ttioctl(tp, cmd, data, flag, p); 774 if (error != EPASSTHROUGH) 775 return (error); 776 777 error = 0; 778 779 s = splserial(); 780 COM_LOCK(sc); 781 782 switch (cmd) { 783 case TIOCSBRK: 784 sacom_break(sc, 1); 785 break; 786 787 case TIOCCBRK: 788 sacom_break(sc, 0); 789 break; 790 791 case TIOCSDTR: 792 sacom_modem(sc, 1); 793 break; 794 795 case TIOCCDTR: 796 sacom_modem(sc, 0); 797 break; 798 799 case TIOCGFLAGS: 800 *(int *)data = sc->sc_swflags; 801 break; 802 803 case TIOCSFLAGS: 804 error = suser(p->p_ucred, &p->p_acflag); 805 if (error) 806 break; 807 sc->sc_swflags = *(int *)data; 808 break; 809 810 case TIOCMSET: 811 case TIOCMBIS: 812 case TIOCMBIC: 813 tiocm_to_sacom(sc, cmd, *(int *)data); 814 break; 815 816 case TIOCMGET: 817 *(int *)data = sacom_to_tiocm(sc); 818 break; 819 820 default: 821 error = EPASSTHROUGH; 822 break; 823 } 824 825 COM_UNLOCK(sc); 826 splx(s); 827 828 #ifdef COM_DEBUG 829 if (sacom_debug) 830 comstatus(sc, "comioctl "); 831 #endif 832 833 return (error); 834 } 835 836 static inline void 837 sacom_schedrx(sc) 838 struct sacom_softc *sc; 839 { 840 841 sc->sc_rx_ready = 1; 842 843 /* Wake up the poller. */ 844 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 845 softintr_schedule(sc->sc_si); 846 #else 847 setsoftserial(); 848 #endif 849 } 850 851 void 852 sacom_break(sc, onoff) 853 struct sacom_softc *sc; 854 int onoff; 855 { 856 857 if (onoff) 858 SET(sc->sc_cr3, CR3_BRK); 859 else 860 CLR(sc->sc_cr3, CR3_BRK); 861 862 if (!sc->sc_heldchange) { 863 if (sc->sc_tx_busy) { 864 sc->sc_heldtbc = sc->sc_tbc; 865 sc->sc_tbc = 0; 866 sc->sc_heldchange = 1; 867 } else 868 sacom_loadchannelregs(sc); 869 } 870 } 871 872 void 873 sacom_modem(sc, onoff) 874 struct sacom_softc *sc; 875 int onoff; 876 { 877 if (!sc->sc_heldchange) { 878 if (sc->sc_tx_busy) { 879 sc->sc_heldtbc = sc->sc_tbc; 880 sc->sc_tbc = 0; 881 sc->sc_heldchange = 1; 882 } else 883 sacom_loadchannelregs(sc); 884 } 885 } 886 887 void 888 tiocm_to_sacom(sc, how, ttybits) 889 struct sacom_softc *sc; 890 u_long how; 891 int ttybits; 892 { 893 } 894 895 int 896 sacom_to_tiocm(sc) 897 struct sacom_softc *sc; 898 { 899 int ttybits = 0; 900 901 if (sc->sc_cr3 != 0) 902 SET(ttybits, TIOCM_LE); 903 904 return (ttybits); 905 } 906 907 static u_int 908 cflag2cr0(cflag) 909 tcflag_t cflag; 910 { 911 u_int cr0; 912 913 cr0 = (cflag & PARENB) ? CR0_PE : 0; 914 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 915 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 916 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 917 918 return (cr0); 919 } 920 921 int 922 sacomparam(tp, t) 923 struct tty *tp; 924 struct termios *t; 925 { 926 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 927 int ospeed = SACOMSPEED(t->c_ospeed); 928 u_int cr0; 929 int s; 930 931 if (COM_ISALIVE(sc) == 0) 932 return (EIO); 933 934 /* Check requested parameters. */ 935 if (ospeed < 0) 936 return (EINVAL); 937 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 938 return (EINVAL); 939 940 /* 941 * For the console, always force CLOCAL and !HUPCL, so that the port 942 * is always active. 943 */ 944 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 945 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 946 SET(t->c_cflag, CLOCAL); 947 CLR(t->c_cflag, HUPCL); 948 } 949 950 /* 951 * If there were no changes, don't do anything. This avoids dropping 952 * input and improves performance when all we did was frob things like 953 * VMIN and VTIME. 954 */ 955 if (tp->t_ospeed == t->c_ospeed && 956 tp->t_cflag == t->c_cflag) 957 return (0); 958 959 cr0 = cflag2cr0(t->c_cflag); 960 961 s = splserial(); 962 COM_LOCK(sc); 963 964 sc->sc_cr0 = cr0; 965 966 sc->sc_speed = ospeed; 967 968 /* And copy to tty. */ 969 tp->t_ispeed = 0; 970 tp->t_ospeed = t->c_ospeed; 971 tp->t_cflag = t->c_cflag; 972 973 if (!sc->sc_heldchange) { 974 if (sc->sc_tx_busy) { 975 sc->sc_heldtbc = sc->sc_tbc; 976 sc->sc_tbc = 0; 977 sc->sc_heldchange = 1; 978 } else 979 sacom_loadchannelregs(sc); 980 } 981 982 if (!ISSET(t->c_cflag, CHWFLOW)) { 983 /* Disable the high water mark. */ 984 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 985 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 986 sacom_schedrx(sc); 987 } 988 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 989 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 990 sacom_hwiflow(sc); 991 } 992 } 993 994 COM_UNLOCK(sc); 995 splx(s); 996 997 (void) (*tp->t_linesw->l_modem)(tp, 1); 998 999 #ifdef COM_DEBUG 1000 if (sacom_debug) 1001 comstatus(sc, "comparam "); 1002 #endif 1003 1004 return (0); 1005 } 1006 1007 void 1008 sacom_iflush(sc) 1009 struct sacom_softc *sc; 1010 { 1011 bus_space_tag_t iot = sc->sc_iot; 1012 bus_space_handle_t ioh = sc->sc_ioh; 1013 #ifdef DIAGNOSTIC 1014 int reg; 1015 #endif 1016 int timo; 1017 1018 #ifdef DIAGNOSTIC 1019 reg = 0xffff; 1020 #endif 1021 timo = 50; 1022 /* flush any pending I/O */ 1023 if (sc->sc_cr3 & CR3_RXE) { 1024 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1025 && --timo) 1026 #ifdef DIAGNOSTIC 1027 reg = 1028 #else 1029 (void) 1030 #endif 1031 bus_space_read_4(iot, ioh, SACOM_DR); 1032 } 1033 #if 0 1034 /* XXX is it good idea to wait TX finish? */ 1035 if (sc->sc_cr3 & CR3_TXE) { 1036 timo = 500; 1037 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1038 && --timo) 1039 delay(100); 1040 } 1041 #endif 1042 #ifdef DIAGNOSTIC 1043 if (!timo) 1044 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1045 reg); 1046 #endif 1047 } 1048 1049 void 1050 sacom_loadchannelregs(sc) 1051 struct sacom_softc *sc; 1052 { 1053 bus_space_tag_t iot = sc->sc_iot; 1054 bus_space_handle_t ioh = sc->sc_ioh; 1055 1056 /* XXXXX necessary? */ 1057 sacom_iflush(sc); 1058 1059 /* Need to stop engines first. */ 1060 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1061 1062 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1063 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1064 1065 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1066 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1067 } 1068 1069 int 1070 sacomhwiflow(tp, block) 1071 struct tty *tp; 1072 int block; 1073 { 1074 #if 0 1075 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1076 int s; 1077 1078 if (COM_ISALIVE(sc) == 0) 1079 return (0); 1080 1081 if (sc->sc_mcr_rts == 0) 1082 return (0); 1083 1084 s = splserial(); 1085 COM_LOCK(sc); 1086 1087 if (block) { 1088 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1089 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1090 sacom_hwiflow(sc); 1091 } 1092 } else { 1093 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1094 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1095 sacom_schedrx(sc); 1096 } 1097 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1098 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1099 sacom_hwiflow(sc); 1100 } 1101 } 1102 1103 COM_UNLOCK(sc); 1104 splx(s); 1105 #endif 1106 return (1); 1107 } 1108 1109 /* 1110 * (un)block input via hw flowcontrol 1111 */ 1112 void 1113 sacom_hwiflow(sc) 1114 struct sacom_softc *sc; 1115 { 1116 #if 0 1117 bus_space_tag_t iot = sc->sc_iot; 1118 bus_space_handle_t ioh = sc->sc_ioh; 1119 1120 /* XXX implement */ 1121 #endif 1122 } 1123 1124 1125 void 1126 sacomstart(tp) 1127 struct tty *tp; 1128 { 1129 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1130 bus_space_tag_t iot = sc->sc_iot; 1131 bus_space_handle_t ioh = sc->sc_ioh; 1132 int s; 1133 1134 if (COM_ISALIVE(sc) == 0) 1135 return; 1136 1137 s = spltty(); 1138 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1139 goto out; 1140 1141 if (tp->t_outq.c_cc <= tp->t_lowat) { 1142 if (ISSET(tp->t_state, TS_ASLEEP)) { 1143 CLR(tp->t_state, TS_ASLEEP); 1144 wakeup(&tp->t_outq); 1145 } 1146 selwakeup(&tp->t_wsel); 1147 if (tp->t_outq.c_cc == 0) 1148 goto out; 1149 } 1150 1151 /* Grab the first contiguous region of buffer space. */ 1152 { 1153 u_char *tba; 1154 int tbc; 1155 1156 tba = tp->t_outq.c_cf; 1157 tbc = ndqb(&tp->t_outq, 0); 1158 1159 (void)splserial(); 1160 COM_LOCK(sc); 1161 1162 sc->sc_tba = tba; 1163 sc->sc_tbc = tbc; 1164 } 1165 1166 SET(tp->t_state, TS_BUSY); 1167 sc->sc_tx_busy = 1; 1168 1169 /* Enable transmit completion interrupts if necessary. */ 1170 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1171 SET(sc->sc_cr3, CR3_TIE); 1172 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1173 } 1174 1175 /* Output the first chunk of the contiguous buffer. */ 1176 sacom_filltx(sc); 1177 1178 COM_UNLOCK(sc); 1179 out: 1180 splx(s); 1181 return; 1182 } 1183 1184 void 1185 sacom_filltx(sc) 1186 struct sacom_softc *sc; 1187 { 1188 bus_space_tag_t iot = sc->sc_iot; 1189 bus_space_handle_t ioh = sc->sc_ioh; 1190 int c, n; 1191 1192 n = 0; 1193 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1194 & SR1_TNF) { 1195 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1196 break; 1197 c = *(sc->sc_tba + n); 1198 c &= 0xff; 1199 bus_space_write_4(iot, ioh, SACOM_DR, c); 1200 n++; 1201 } 1202 sc->sc_tbc -= n; 1203 sc->sc_tba += n; 1204 } 1205 1206 /* 1207 * Stop output on a line. 1208 */ 1209 void 1210 sacomstop(tp, flag) 1211 struct tty *tp; 1212 int flag; 1213 { 1214 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1215 int s; 1216 1217 s = splserial(); 1218 COM_LOCK(sc); 1219 if (ISSET(tp->t_state, TS_BUSY)) { 1220 /* Stop transmitting at the next chunk. */ 1221 sc->sc_tbc = 0; 1222 sc->sc_heldtbc = 0; 1223 if (!ISSET(tp->t_state, TS_TTSTOP)) 1224 SET(tp->t_state, TS_FLUSH); 1225 } 1226 COM_UNLOCK(sc); 1227 splx(s); 1228 } 1229 1230 static inline void 1231 sacom_rxsoft(sc, tp) 1232 struct sacom_softc *sc; 1233 struct tty *tp; 1234 { 1235 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1236 u_char *get, *end; 1237 u_int cc, scc; 1238 u_char sr1; 1239 int code; 1240 int s; 1241 1242 end = sc->sc_ebuf; 1243 get = sc->sc_rbget; 1244 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1245 1246 while (cc) { 1247 code = get[0]; 1248 sr1 = get[1]; 1249 if (ISSET(sr1, SR1_FRE)) 1250 SET(code, TTY_FE); 1251 if (ISSET(sr1, SR1_PRE)) 1252 SET(code, TTY_PE); 1253 if ((*rint)(code, tp) == -1) { 1254 /* 1255 * The line discipline's buffer is out of space. 1256 */ 1257 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1258 /* 1259 * We're either not using flow control, or the 1260 * line discipline didn't tell us to block for 1261 * some reason. Either way, we have no way to 1262 * know when there's more space available, so 1263 * just drop the rest of the data. 1264 */ 1265 get += cc << 1; 1266 if (get >= end) 1267 get -= SACOM_RING_SIZE << 1; 1268 cc = 0; 1269 } else { 1270 /* 1271 * Don't schedule any more receive processing 1272 * until the line discipline tells us there's 1273 * space available (through comhwiflow()). 1274 * Leave the rest of the data in the input 1275 * buffer. 1276 */ 1277 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1278 } 1279 break; 1280 } 1281 get += 2; 1282 if (get >= end) 1283 get = sc->sc_rbuf; 1284 cc--; 1285 } 1286 1287 if (cc != scc) { 1288 sc->sc_rbget = get; 1289 s = splserial(); 1290 COM_LOCK(sc); 1291 1292 cc = sc->sc_rbavail += scc - cc; 1293 /* Buffers should be ok again, release possible block. */ 1294 if (cc >= 1) { 1295 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1296 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1297 SET(sc->sc_cr3, CR3_RIE); 1298 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1299 SACOM_CR3, sc->sc_cr3); 1300 } 1301 } 1302 COM_UNLOCK(sc); 1303 splx(s); 1304 } 1305 } 1306 1307 static inline void 1308 sacom_txsoft(sc, tp) 1309 struct sacom_softc *sc; 1310 struct tty *tp; 1311 { 1312 1313 CLR(tp->t_state, TS_BUSY); 1314 if (ISSET(tp->t_state, TS_FLUSH)) 1315 CLR(tp->t_state, TS_FLUSH); 1316 else 1317 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1318 (*tp->t_linesw->l_start)(tp); 1319 } 1320 1321 static inline void 1322 sacom_stsoft(sc, tp) 1323 struct sacom_softc *sc; 1324 struct tty *tp; 1325 { 1326 } 1327 1328 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1329 void 1330 sacomsoft(arg) 1331 void *arg; 1332 { 1333 struct sacom_softc *sc = arg; 1334 struct tty *tp; 1335 1336 if (COM_ISALIVE(sc) == 0) 1337 return; 1338 1339 { 1340 #else 1341 void 1342 sacomsoft() 1343 { 1344 struct sacom_softc *sc; 1345 struct tty *tp; 1346 int unit; 1347 1348 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1349 sc = device_lookup(&sacom_cd, unit); 1350 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1351 continue; 1352 1353 if (COM_ISALIVE(sc) == 0) 1354 continue; 1355 1356 tp = sc->sc_tty; 1357 if (tp == NULL) 1358 continue; 1359 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1360 continue; 1361 #endif 1362 tp = sc->sc_tty; 1363 1364 if (sc->sc_rx_ready) { 1365 sc->sc_rx_ready = 0; 1366 sacom_rxsoft(sc, tp); 1367 } 1368 1369 if (sc->sc_st_check) { 1370 sc->sc_st_check = 0; 1371 sacom_stsoft(sc, tp); 1372 } 1373 1374 if (sc->sc_tx_done) { 1375 sc->sc_tx_done = 0; 1376 sacom_txsoft(sc, tp); 1377 } 1378 } 1379 1380 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1381 #endif 1382 } 1383 1384 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1385 /* there has got to be a better way to do comsoft() */ 1386 }} 1387 #endif 1388 1389 int 1390 sacomintr(arg) 1391 void *arg; 1392 { 1393 struct sacom_softc *sc = arg; 1394 bus_space_tag_t iot = sc->sc_iot; 1395 bus_space_handle_t ioh = sc->sc_ioh; 1396 u_char *put, *end; 1397 u_int cc; 1398 u_int sr0, sr1; 1399 1400 if (COM_ISALIVE(sc) == 0) 1401 return (0); 1402 1403 COM_LOCK(sc); 1404 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1405 if (! sr0) { 1406 COM_UNLOCK(sc); 1407 return (0); 1408 } 1409 if (ISSET(sr0, SR0_EIF)) 1410 /* XXX silently discard error bits */ 1411 bus_space_read_4(iot, ioh, SACOM_DR); 1412 if (ISSET(sr0, SR0_RBB)) 1413 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1414 if (ISSET(sr0, SR0_REB)) { 1415 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1416 #if defined(DDB) || defined(KGDB) 1417 #ifndef DDB_BREAK_CHAR 1418 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1419 console_debugger(); 1420 } 1421 #endif 1422 #endif /* DDB || KGDB */ 1423 } 1424 1425 1426 end = sc->sc_ebuf; 1427 put = sc->sc_rbput; 1428 cc = sc->sc_rbavail; 1429 1430 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1431 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1432 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1433 while (cc > 0) { 1434 if (!ISSET(sr1, SR1_RNE)) { 1435 bus_space_write_4(iot, ioh, SACOM_SR0, 1436 SR0_RID); 1437 break; 1438 } 1439 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1440 put[1] = sr1; 1441 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1442 if (put[0] == DDB_BREAK_CHAR && 1443 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1444 console_debugger(); 1445 1446 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1447 continue; 1448 } 1449 #endif 1450 put += 2; 1451 if (put >= end) 1452 put = sc->sc_rbuf; 1453 cc--; 1454 1455 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1456 } 1457 1458 /* 1459 * Current string of incoming characters ended because 1460 * no more data was available or we ran out of space. 1461 * Schedule a receive event if any data was received. 1462 * If we're out of space, turn off receive interrupts. 1463 */ 1464 sc->sc_rbput = put; 1465 sc->sc_rbavail = cc; 1466 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1467 sc->sc_rx_ready = 1; 1468 1469 /* XXX do RX hardware flow control */ 1470 1471 /* 1472 * If we're out of space, disable receive interrupts 1473 * until the queue has drained a bit. 1474 */ 1475 if (!cc) { 1476 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1477 CLR(sc->sc_cr3, CR3_RIE); 1478 bus_space_write_4(iot, ioh, SACOM_CR3, 1479 sc->sc_cr3); 1480 } 1481 } else { 1482 #ifdef DIAGNOSTIC 1483 panic("sacomintr: we shouldn't reach here"); 1484 #endif 1485 CLR(sc->sc_cr3, CR3_RIE); 1486 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1487 } 1488 } 1489 1490 /* 1491 * Done handling any receive interrupts. See if data can be 1492 * transmitted as well. Schedule tx done event if no data left 1493 * and tty was marked busy. 1494 */ 1495 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1496 if (ISSET(sr0, SR0_TFS)) { 1497 /* 1498 * If we've delayed a parameter change, do it now, and restart 1499 * output. 1500 * XXX sacom_loadchanelregs() waits TX completion, 1501 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1502 */ 1503 if (sc->sc_heldchange) { 1504 sacom_loadchannelregs(sc); 1505 sc->sc_heldchange = 0; 1506 sc->sc_tbc = sc->sc_heldtbc; 1507 sc->sc_heldtbc = 0; 1508 } 1509 1510 /* Output the next chunk of the contiguous buffer, if any. */ 1511 if (sc->sc_tbc > 0) { 1512 sacom_filltx(sc); 1513 } else { 1514 /* Disable transmit completion interrupts if necessary. */ 1515 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1516 CLR(sc->sc_cr3, CR3_TIE); 1517 bus_space_write_4(iot, ioh, SACOM_CR3, 1518 sc->sc_cr3); 1519 } 1520 if (sc->sc_tx_busy) { 1521 sc->sc_tx_busy = 0; 1522 sc->sc_tx_done = 1; 1523 } 1524 } 1525 } 1526 COM_UNLOCK(sc); 1527 1528 /* Wake up the poller. */ 1529 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1530 softintr_schedule(sc->sc_si); 1531 #else 1532 setsoftserial(); 1533 #endif 1534 1535 #if NRND > 0 && defined(RND_COM) 1536 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1537 #endif 1538 return (1); 1539 } 1540 1541 static void 1542 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1543 1544 /* XXX this should be done at sc->enable function */ 1545 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1546 SAGPIO_PCR, 0xa0000); 1547 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1548 SAGPIO_PSR, 0x100); 1549 } 1550 1551 /* Initialization for serial console */ 1552 int 1553 sacominit(iot, iobase, baud, cflag, iohp) 1554 bus_space_tag_t iot; 1555 bus_addr_t iobase; 1556 int baud; 1557 tcflag_t cflag; 1558 bus_space_handle_t *iohp; 1559 { 1560 int brd, cr0; 1561 1562 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1563 printf("register map failed\n"); 1564 1565 /* wait for the Tx queue to drain and disable the UART */ 1566 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1567 ; 1568 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1569 1570 cr0 = cflag2cr0(cflag); 1571 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1572 1573 brd = SACOMSPEED(baud); 1574 sacomconsrate = baud; 1575 sacomconsaddr = iobase; 1576 sacomconscflag = cflag; 1577 /* XXX assumes little endian */ 1578 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1579 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1580 1581 /* enable the UART */ 1582 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1583 1584 return (0); 1585 } 1586 1587 void 1588 sacomcnprobe(cp) 1589 struct consdev *cp; 1590 { 1591 cp->cn_pri = CN_REMOTE; 1592 } 1593 1594 void 1595 sacomcninit(cp) 1596 struct consdev *cp; 1597 { 1598 if (cp == NULL) { 1599 /* XXX cp == NULL means that MMU is disabled. */ 1600 sacomconsioh = SACOM3_HW_BASE; 1601 sacomconstag = &sa11x0_bs_tag; 1602 cn_tab = &sacomcons; 1603 return; 1604 } 1605 1606 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1607 CONMODE, &sacomconsioh)) 1608 panic("can't init serial console @%x", CONADDR); 1609 cn_tab = &sacomcons; 1610 sacomconstag = &sa11x0_bs_tag; 1611 } 1612 1613 int 1614 sacomcngetc(dev) 1615 dev_t dev; 1616 { 1617 int c, s; 1618 1619 s = spltty(); /* XXX do we need this? */ 1620 1621 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1622 & SR1_RNE)) { 1623 #if defined(DDB) || defined(KGDB) 1624 #ifndef DDB_BREAK_CHAR 1625 u_int sr0; 1626 extern int db_active; 1627 1628 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1629 if (ISSET(sr0, SR0_RBB)) 1630 bus_space_write_4(sacomconstag, sacomconsioh, 1631 SACOM_SR0, SR0_RBB); 1632 if (ISSET(sr0, SR0_REB)) { 1633 bus_space_write_4(sacomconstag, sacomconsioh, 1634 SACOM_SR0, SR0_REB); 1635 if (db_active == 0) 1636 console_debugger(); 1637 } 1638 #endif 1639 #endif /* DDB || KGDB */ 1640 } 1641 1642 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1643 c &= 0xff; 1644 splx(s); 1645 1646 return (c); 1647 } 1648 1649 void 1650 sacomcnputc(dev, c) 1651 dev_t dev; 1652 int c; 1653 { 1654 int s; 1655 1656 s = spltty(); /* XXX do we need this? */ 1657 1658 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1659 & SR1_TNF)) 1660 ; 1661 1662 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1663 splx(s); 1664 } 1665 1666 void 1667 sacomcnpollc(dev, on) 1668 dev_t dev; 1669 int on; 1670 { 1671 1672 } 1673 1674 #if 0 1675 #ifdef DEBUG 1676 int 1677 sacomcncharpoll() 1678 { 1679 int c; 1680 1681 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1682 & SR1_RNE)) 1683 return -1; 1684 1685 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1686 c &= 0xff; 1687 1688 return (c); 1689 } 1690 #endif 1691 #endif 1692 1693 /* helper function to identify the com ports used by 1694 console or KGDB (and not yet autoconf attached) */ 1695 int 1696 sacom_is_console(iot, iobase, ioh) 1697 bus_space_tag_t iot; 1698 bus_addr_t iobase; 1699 bus_space_handle_t *ioh; 1700 { 1701 bus_space_handle_t help; 1702 1703 if (! sacomconsattached && 1704 iot == sacomconstag && iobase == sacomconsaddr) 1705 help = sacomconsioh; 1706 else 1707 return (0); 1708 1709 if (ioh) 1710 *ioh = help; 1711 return (1); 1712 } 1713
Indexes created Thu Oct 02 14:10:14 GMT 2025