sa11x0_com.c revision 1.15
1 /* $NetBSD: sa11x0_com.c,v 1.15 2003/06/23 11:01:09 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Charles M. Hannum. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * @(#)com.c 7.5 (Berkeley) 5/16/91 75 */ 76 77 #include "opt_com.h" 78 #include "opt_ddb.h" 79 #include "opt_ddbparam.h" 80 #include "opt_kgdb.h" 81 #include "opt_multiprocessor.h" 82 #include "opt_lockdebug.h" 83 84 #include "rnd.h" 85 #if NRND > 0 && defined(RND_COM) 86 #include <sys/rnd.h> 87 #endif 88 89 #include <sys/param.h> 90 #include <sys/systm.h> 91 #include <sys/types.h> 92 #include <sys/conf.h> 93 #include <sys/file.h> 94 #include <sys/device.h> 95 #include <sys/kernel.h> 96 #include <sys/malloc.h> 97 #include <sys/tty.h> 98 #include <sys/uio.h> 99 #include <sys/vnode.h> 100 101 #include <dev/cons.h> 102 103 #include <machine/bus.h> 104 #include <arm/sa11x0/sa11x0_reg.h> 105 #include <arm/sa11x0/sa11x0_var.h> 106 #include <arm/sa11x0/sa11x0_comreg.h> 107 #include <arm/sa11x0/sa11x0_comvar.h> 108 #include <arm/sa11x0/sa11x0_gpioreg.h> 109 110 #ifdef hpcarm 111 #include <hpc/include/platid.h> 112 #include <hpc/include/platid_mask.h> 113 #endif 114 115 #include "sacom.h" 116 117 dev_type_open(sacomopen); 118 dev_type_close(sacomclose); 119 dev_type_read(sacomread); 120 dev_type_write(sacomwrite); 121 dev_type_ioctl(sacomioctl); 122 dev_type_stop(sacomstop); 123 dev_type_tty(sacomtty); 124 dev_type_poll(sacompoll); 125 126 const struct cdevsw sacom_cdevsw = { 127 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 128 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 129 }; 130 131 static int sacom_match(struct device *, struct cfdata *, void *); 132 static void sacom_attach(struct device *, struct device *, void *); 133 static void sacom_filltx(struct sacom_softc *); 134 static void sacom_attach_subr(struct sacom_softc *); 135 #if defined(DDB) || defined(KGDB) 136 static void sacom_enable_debugport(struct sacom_softc *); 137 #endif 138 int sacom_detach(struct device *, int); 139 void sacom_config(struct sacom_softc *); 140 int sacom_activate(struct device *, enum devact); 141 void sacom_shutdown(struct sacom_softc *); 142 static u_int cflag2cr0(tcflag_t); 143 int sacomparam(struct tty *, struct termios *); 144 void sacomstart(struct tty *); 145 int sacomhwiflow(struct tty *, int); 146 147 void sacom_loadchannelregs(struct sacom_softc *); 148 void sacom_hwiflow(struct sacom_softc *); 149 void sacom_break(struct sacom_softc *, int); 150 void sacom_modem(struct sacom_softc *, int); 151 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 152 int sacom_to_tiocm(struct sacom_softc *); 153 void sacom_iflush(struct sacom_softc *); 154 155 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 156 bus_space_handle_t *); 157 int sacom_is_console(bus_space_tag_t, bus_addr_t, 158 bus_space_handle_t *); 159 160 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 161 void sacomsoft(void *); 162 #else 163 void sacomsoft(void); 164 #endif 165 166 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 167 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 168 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 169 static inline void sacom_schedrx(struct sacom_softc *); 170 171 #ifdef hpcarm 172 /* HPCARM specific functions */ 173 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 174 #endif 175 176 #define COMUNIT_MASK 0x7ffff 177 #define COMDIALOUT_MASK 0x80000 178 179 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 180 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 181 182 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 183 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 184 185 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 186 #define COM_LOCK(sc) 187 #define COM_UNLOCK(sc) 188 189 #define SET(t, f) (t) |= (f) 190 #define CLR(t, f) (t) &= ~(f) 191 #define ISSET(t, f) ((t) & (f)) 192 193 int sacomintr(void *); 194 int sacomcngetc(dev_t); 195 void sacomcnputc(dev_t, int); 196 void sacomcnpollc(dev_t, int); 197 198 void sacomcnprobe(struct consdev *); 199 void sacomcninit(struct consdev *); 200 201 extern struct bus_space sa11x0_bs_tag; 202 203 static bus_space_tag_t sacomconstag; 204 static bus_space_handle_t sacomconsioh; 205 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 206 207 static int sacomconsattached; 208 static int sacomconsrate; 209 static tcflag_t sacomconscflag; 210 211 CFATTACH_DECL(sacom, sizeof(struct sacom_softc), 212 sacom_match, sacom_attach, NULL, NULL); 213 extern struct cfdriver sacom_cd; 214 215 #ifdef hpcarm 216 struct platid_data sacom_platid_table[] = { 217 { &platid_mask_MACH_HP_JORNADA_720, sacom_j720_init }, 218 { &platid_mask_MACH_HP_JORNADA_720JP, sacom_j720_init }, 219 { NULL, NULL } 220 }; 221 #endif 222 223 struct consdev sacomcons = { 224 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 225 NULL, NULL, NODEV, CN_NORMAL 226 }; 227 228 #ifndef CONMODE 229 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 230 #endif 231 #ifndef CONSPEED 232 #define CONSPEED 9600 233 #endif 234 #ifndef CONADDR 235 #define CONADDR SACOM3_BASE 236 #endif 237 238 static int 239 sacom_match(parent, match, aux) 240 struct device *parent; 241 struct cfdata *match; 242 void *aux; 243 { 244 return (1); 245 } 246 247 void 248 sacom_attach(parent, self, aux) 249 struct device *parent; 250 struct device *self; 251 void *aux; 252 { 253 struct sacom_softc *sc = (struct sacom_softc*)self; 254 struct sa11x0_attach_args *sa = aux; 255 256 #ifdef hpcarm 257 struct platid_data *p; 258 void (*mdinit)(struct device *, struct sacom_softc *); 259 #endif 260 261 printf("\n"); 262 263 sc->sc_iot = sa->sa_iot; 264 sc->sc_baseaddr = sa->sa_addr; 265 266 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 267 &sc->sc_ioh)) { 268 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 269 return; 270 } 271 272 printf("%s: ", sc->sc_dev.dv_xname); 273 switch(sc->sc_baseaddr) { 274 case 0x80050000: 275 printf("SA11x0 UART3\n"); 276 break; 277 case 0x80010000: 278 printf("SA11x0 UART1\n"); 279 break; 280 case 0x80030000: 281 printf("SA11x0 UART2 (IRDA)\n"); 282 break; 283 default: 284 printf("unknown SA11x0 UART\n"); 285 break; 286 } 287 288 sacom_attach_subr(sc); 289 290 #ifdef hpcarm 291 /* Do hpcarm specific initialization, if any */ 292 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 293 mdinit = p->data; 294 (mdinit)(parent, sc); 295 } 296 #endif 297 298 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 299 } 300 301 void 302 sacom_attach_subr(sc) 303 struct sacom_softc *sc; 304 { 305 bus_addr_t iobase = sc->sc_baseaddr; 306 bus_space_tag_t iot = sc->sc_iot; 307 struct tty *tp; 308 309 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 310 simple_lock_init(&sc->sc_lock); 311 #endif 312 313 /* XXX Do we need to disable interrupts here? */ 314 315 if (iot == sacomconstag && iobase == sacomconsaddr) { 316 sacomconsattached = 1; 317 sc->sc_speed = SACOMSPEED(sacomconsrate); 318 319 /* Make sure the console is always "hardwired". */ 320 delay(10000); /* wait for output to finish */ 321 SET(sc->sc_hwflags, COM_HW_CONSOLE); 322 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 323 } 324 325 tp = ttymalloc(); 326 tp->t_oproc = sacomstart; 327 tp->t_param = sacomparam; 328 tp->t_hwiflow = sacomhwiflow; 329 330 sc->sc_tty = tp; 331 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 332 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 333 sc->sc_rbavail = SACOM_RING_SIZE; 334 if (sc->sc_rbuf == NULL) { 335 printf("%s: unable to allocate ring buffer\n", 336 sc->sc_dev.dv_xname); 337 return; 338 } 339 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 340 sc->sc_tbc = 0; 341 342 tty_attach(tp); 343 344 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 345 int maj; 346 347 /* locate the major number */ 348 maj = cdevsw_lookup_major(&sacom_cdevsw); 349 350 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 351 352 delay(10000); /* XXX */ 353 printf("%s: console\n", sc->sc_dev.dv_xname); 354 delay(10000); /* XXX */ 355 } 356 357 358 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 359 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 360 #endif 361 362 #if NRND > 0 && defined(RND_COM) 363 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 364 RND_TYPE_TTY, 0); 365 #endif 366 367 /* if there are no enable/disable functions, assume the device 368 is always enabled */ 369 if (!sc->enable) 370 sc->enabled = 1; 371 372 sacom_config(sc); 373 374 SET(sc->sc_hwflags, COM_HW_DEV_OK); 375 } 376 377 /* This is necessary when dynamically changing SAIP configuration. */ 378 int 379 sacom_detach(self, flags) 380 struct device *self; 381 int flags; 382 { 383 struct sacom_softc *sc = (struct sacom_softc *)self; 384 int maj, mn; 385 386 /* locate the major number */ 387 maj = cdevsw_lookup_major(&sacom_cdevsw); 388 389 /* Nuke the vnodes for any open instances. */ 390 mn = self->dv_unit; 391 vdevgone(maj, mn, mn, VCHR); 392 393 mn |= COMDIALOUT_MASK; 394 vdevgone(maj, mn, mn, VCHR); 395 396 /* Free the receive buffer. */ 397 free(sc->sc_rbuf, M_DEVBUF); 398 399 /* Detach and free the tty. */ 400 tty_detach(sc->sc_tty); 401 ttyfree(sc->sc_tty); 402 403 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 404 /* Unhook the soft interrupt handler. */ 405 softintr_disestablish(sc->sc_si); 406 #endif 407 408 #if NRND > 0 && defined(RND_COM) 409 /* Unhook the entropy source. */ 410 rnd_detach_source(&sc->rnd_source); 411 #endif 412 413 return (0); 414 } 415 416 void 417 sacom_config(sc) 418 struct sacom_softc *sc; 419 { 420 bus_space_tag_t iot = sc->sc_iot; 421 bus_space_handle_t ioh = sc->sc_ioh; 422 423 /* Disable engine before configuring the device. */ 424 sc->sc_cr3 = 0; 425 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 426 427 #ifdef DDB 428 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 429 sacom_enable_debugport(sc); 430 #endif 431 } 432 433 #ifdef DDB 434 static void 435 sacom_enable_debugport(sc) 436 struct sacom_softc *sc; 437 { 438 bus_space_tag_t iot = sc->sc_iot; 439 bus_space_handle_t ioh = sc->sc_ioh; 440 int s; 441 442 s = splserial(); 443 COM_LOCK(sc); 444 sc->sc_cr3 = CR3_RXE | CR3_TXE; 445 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 446 COM_UNLOCK(sc); 447 splx(s); 448 } 449 #endif 450 451 int 452 sacom_activate(self, act) 453 struct device *self; 454 enum devact act; 455 { 456 struct sacom_softc *sc = (struct sacom_softc *)self; 457 int s, rv = 0; 458 459 s = splserial(); 460 COM_LOCK(sc); 461 switch (act) { 462 case DVACT_ACTIVATE: 463 rv = EOPNOTSUPP; 464 break; 465 466 case DVACT_DEACTIVATE: 467 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 468 rv = EBUSY; 469 break; 470 } 471 472 if (sc->disable != NULL && sc->enabled != 0) { 473 (*sc->disable)(sc); 474 sc->enabled = 0; 475 } 476 break; 477 } 478 479 COM_UNLOCK(sc); 480 splx(s); 481 return (rv); 482 } 483 484 void 485 sacom_shutdown(sc) 486 struct sacom_softc *sc; 487 { 488 struct tty *tp = sc->sc_tty; 489 int s; 490 491 s = splserial(); 492 COM_LOCK(sc); 493 494 /* Clear any break condition set with TIOCSBRK. */ 495 sacom_break(sc, 0); 496 497 /* 498 * Hang up if necessary. Wait a bit, so the other side has time to 499 * notice even if we immediately open the port again. 500 * Avoid tsleeping above splhigh(). 501 */ 502 if (ISSET(tp->t_cflag, HUPCL)) { 503 sacom_modem(sc, 0); 504 COM_UNLOCK(sc); 505 splx(s); 506 /* XXX tsleep will only timeout */ 507 (void) tsleep(sc, TTIPRI, ttclos, hz); 508 s = splserial(); 509 COM_LOCK(sc); 510 } 511 512 /* Turn off interrupts. */ 513 sc->sc_cr3 = 0; 514 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 515 516 if (sc->disable) { 517 #ifdef DIAGNOSTIC 518 if (!sc->enabled) 519 panic("sacom_shutdown: not enabled?"); 520 #endif 521 (*sc->disable)(sc); 522 sc->enabled = 0; 523 } 524 COM_UNLOCK(sc); 525 splx(s); 526 } 527 528 int 529 sacomopen(dev, flag, mode, p) 530 dev_t dev; 531 int flag, mode; 532 struct proc *p; 533 { 534 struct sacom_softc *sc; 535 struct tty *tp; 536 int s, s2; 537 int error; 538 539 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 540 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 541 sc->sc_rbuf == NULL) 542 return (ENXIO); 543 544 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 545 return (ENXIO); 546 547 tp = sc->sc_tty; 548 549 if (ISSET(tp->t_state, TS_ISOPEN) && 550 ISSET(tp->t_state, TS_XCLUDE) && 551 p->p_ucred->cr_uid != 0) 552 return (EBUSY); 553 554 s = spltty(); 555 556 /* 557 * Do the following iff this is a first open. 558 */ 559 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 560 struct termios t; 561 562 tp->t_dev = dev; 563 564 s2 = splserial(); 565 COM_LOCK(sc); 566 567 if (sc->enable) { 568 if ((*sc->enable)(sc)) { 569 COM_UNLOCK(sc); 570 splx(s2); 571 splx(s); 572 printf("%s: device enable failed\n", 573 sc->sc_dev.dv_xname); 574 return (EIO); 575 } 576 sc->enabled = 1; 577 sacom_config(sc); 578 } 579 580 /* Turn on interrupts. */ 581 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 582 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 583 sc->sc_cr3); 584 585 586 COM_UNLOCK(sc); 587 splx(s2); 588 589 /* 590 * Initialize the termios status to the defaults. Add in the 591 * sticky bits from TIOCSFLAGS. 592 */ 593 t.c_ispeed = 0; 594 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 595 t.c_ospeed = sacomconsrate; 596 t.c_cflag = sacomconscflag; 597 } else { 598 t.c_ospeed = TTYDEF_SPEED; 599 t.c_cflag = TTYDEF_CFLAG; 600 } 601 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 602 SET(t.c_cflag, CLOCAL); 603 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 604 SET(t.c_cflag, CRTSCTS); 605 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 606 SET(t.c_cflag, MDMBUF); 607 /* Make sure sacomparam() will do something. */ 608 tp->t_ospeed = 0; 609 (void) sacomparam(tp, &t); 610 tp->t_iflag = TTYDEF_IFLAG; 611 tp->t_oflag = TTYDEF_OFLAG; 612 tp->t_lflag = TTYDEF_LFLAG; 613 ttychars(tp); 614 ttsetwater(tp); 615 616 s2 = splserial(); 617 COM_LOCK(sc); 618 619 /* 620 * Turn on DTR. We must always do this, even if carrier is not 621 * present, because otherwise we'd have to use TIOCSDTR 622 * immediately after setting CLOCAL, which applications do not 623 * expect. We always assert DTR while the device is open 624 * unless explicitly requested to deassert it. 625 */ 626 sacom_modem(sc, 1); 627 628 /* Clear the input ring, and unblock. */ 629 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 630 sc->sc_rbavail = SACOM_RING_SIZE; 631 sacom_iflush(sc); 632 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 633 sacom_hwiflow(sc); 634 635 #ifdef COM_DEBUG 636 if (sacom_debug) 637 comstatus(sc, "sacomopen "); 638 #endif 639 640 COM_UNLOCK(sc); 641 splx(s2); 642 } 643 644 splx(s); 645 646 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 647 if (error) 648 goto bad; 649 650 error = (*tp->t_linesw->l_open)(dev, tp); 651 if (error) 652 goto bad; 653 654 return (0); 655 656 bad: 657 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 658 /* 659 * We failed to open the device, and nobody else had it opened. 660 * Clean up the state as appropriate. 661 */ 662 sacom_shutdown(sc); 663 } 664 665 return (error); 666 } 667 668 int 669 sacomclose(dev, flag, mode, p) 670 dev_t dev; 671 int flag, mode; 672 struct proc *p; 673 { 674 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 675 struct tty *tp = sc->sc_tty; 676 677 /* XXX This is for cons.c. */ 678 if (!ISSET(tp->t_state, TS_ISOPEN)) 679 return (0); 680 681 (*tp->t_linesw->l_close)(tp, flag); 682 ttyclose(tp); 683 684 if (COM_ISALIVE(sc) == 0) 685 return (0); 686 687 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 688 /* 689 * Although we got a last close, the device may still be in 690 * use; e.g. if this was the dialout node, and there are still 691 * processes waiting for carrier on the non-dialout node. 692 */ 693 sacom_shutdown(sc); 694 } 695 696 return (0); 697 } 698 699 int 700 sacomread(dev, uio, flag) 701 dev_t dev; 702 struct uio *uio; 703 int flag; 704 { 705 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 706 struct tty *tp = sc->sc_tty; 707 708 if (COM_ISALIVE(sc) == 0) 709 return (EIO); 710 711 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 712 } 713 714 int 715 sacomwrite(dev, uio, flag) 716 dev_t dev; 717 struct uio *uio; 718 int flag; 719 { 720 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 721 struct tty *tp = sc->sc_tty; 722 723 if (COM_ISALIVE(sc) == 0) 724 return (EIO); 725 726 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 727 } 728 729 int 730 sacompoll(dev, events, p) 731 dev_t dev; 732 int events; 733 struct proc *p; 734 { 735 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 736 struct tty *tp = sc->sc_tty; 737 738 if (COM_ISALIVE(sc) == 0) 739 return (EIO); 740 741 return ((*tp->t_linesw->l_poll)(tp, events, p)); 742 } 743 744 struct tty * 745 sacomtty(dev) 746 dev_t dev; 747 { 748 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 749 struct tty *tp = sc->sc_tty; 750 751 return (tp); 752 } 753 754 int 755 sacomioctl(dev, cmd, data, flag, p) 756 dev_t dev; 757 u_long cmd; 758 caddr_t data; 759 int flag; 760 struct proc *p; 761 { 762 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 763 struct tty *tp = sc->sc_tty; 764 int error; 765 int s; 766 767 if (COM_ISALIVE(sc) == 0) 768 return (EIO); 769 770 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 771 if (error != EPASSTHROUGH) 772 return (error); 773 774 error = ttioctl(tp, cmd, data, flag, p); 775 if (error != EPASSTHROUGH) 776 return (error); 777 778 error = 0; 779 780 s = splserial(); 781 COM_LOCK(sc); 782 783 switch (cmd) { 784 case TIOCSBRK: 785 sacom_break(sc, 1); 786 break; 787 788 case TIOCCBRK: 789 sacom_break(sc, 0); 790 break; 791 792 case TIOCSDTR: 793 sacom_modem(sc, 1); 794 break; 795 796 case TIOCCDTR: 797 sacom_modem(sc, 0); 798 break; 799 800 case TIOCGFLAGS: 801 *(int *)data = sc->sc_swflags; 802 break; 803 804 case TIOCSFLAGS: 805 error = suser(p->p_ucred, &p->p_acflag); 806 if (error) 807 break; 808 sc->sc_swflags = *(int *)data; 809 break; 810 811 case TIOCMSET: 812 case TIOCMBIS: 813 case TIOCMBIC: 814 tiocm_to_sacom(sc, cmd, *(int *)data); 815 break; 816 817 case TIOCMGET: 818 *(int *)data = sacom_to_tiocm(sc); 819 break; 820 821 default: 822 error = EPASSTHROUGH; 823 break; 824 } 825 826 COM_UNLOCK(sc); 827 splx(s); 828 829 #ifdef COM_DEBUG 830 if (sacom_debug) 831 comstatus(sc, "comioctl "); 832 #endif 833 834 return (error); 835 } 836 837 static inline void 838 sacom_schedrx(sc) 839 struct sacom_softc *sc; 840 { 841 842 sc->sc_rx_ready = 1; 843 844 /* Wake up the poller. */ 845 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 846 softintr_schedule(sc->sc_si); 847 #else 848 setsoftserial(); 849 #endif 850 } 851 852 void 853 sacom_break(sc, onoff) 854 struct sacom_softc *sc; 855 int onoff; 856 { 857 858 if (onoff) 859 SET(sc->sc_cr3, CR3_BRK); 860 else 861 CLR(sc->sc_cr3, CR3_BRK); 862 863 if (!sc->sc_heldchange) { 864 if (sc->sc_tx_busy) { 865 sc->sc_heldtbc = sc->sc_tbc; 866 sc->sc_tbc = 0; 867 sc->sc_heldchange = 1; 868 } else 869 sacom_loadchannelregs(sc); 870 } 871 } 872 873 void 874 sacom_modem(sc, onoff) 875 struct sacom_softc *sc; 876 int onoff; 877 { 878 if (!sc->sc_heldchange) { 879 if (sc->sc_tx_busy) { 880 sc->sc_heldtbc = sc->sc_tbc; 881 sc->sc_tbc = 0; 882 sc->sc_heldchange = 1; 883 } else 884 sacom_loadchannelregs(sc); 885 } 886 } 887 888 void 889 tiocm_to_sacom(sc, how, ttybits) 890 struct sacom_softc *sc; 891 u_long how; 892 int ttybits; 893 { 894 } 895 896 int 897 sacom_to_tiocm(sc) 898 struct sacom_softc *sc; 899 { 900 int ttybits = 0; 901 902 if (sc->sc_cr3 != 0) 903 SET(ttybits, TIOCM_LE); 904 905 return (ttybits); 906 } 907 908 static u_int 909 cflag2cr0(cflag) 910 tcflag_t cflag; 911 { 912 u_int cr0; 913 914 cr0 = (cflag & PARENB) ? CR0_PE : 0; 915 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 916 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 917 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 918 919 return (cr0); 920 } 921 922 int 923 sacomparam(tp, t) 924 struct tty *tp; 925 struct termios *t; 926 { 927 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 928 int ospeed = SACOMSPEED(t->c_ospeed); 929 u_int cr0; 930 int s; 931 932 if (COM_ISALIVE(sc) == 0) 933 return (EIO); 934 935 /* Check requested parameters. */ 936 if (ospeed < 0) 937 return (EINVAL); 938 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 939 return (EINVAL); 940 941 /* 942 * For the console, always force CLOCAL and !HUPCL, so that the port 943 * is always active. 944 */ 945 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 946 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 947 SET(t->c_cflag, CLOCAL); 948 CLR(t->c_cflag, HUPCL); 949 } 950 951 /* 952 * If there were no changes, don't do anything. This avoids dropping 953 * input and improves performance when all we did was frob things like 954 * VMIN and VTIME. 955 */ 956 if (tp->t_ospeed == t->c_ospeed && 957 tp->t_cflag == t->c_cflag) 958 return (0); 959 960 cr0 = cflag2cr0(t->c_cflag); 961 962 s = splserial(); 963 COM_LOCK(sc); 964 965 sc->sc_cr0 = cr0; 966 967 sc->sc_speed = ospeed; 968 969 /* And copy to tty. */ 970 tp->t_ispeed = 0; 971 tp->t_ospeed = t->c_ospeed; 972 tp->t_cflag = t->c_cflag; 973 974 if (!sc->sc_heldchange) { 975 if (sc->sc_tx_busy) { 976 sc->sc_heldtbc = sc->sc_tbc; 977 sc->sc_tbc = 0; 978 sc->sc_heldchange = 1; 979 } else 980 sacom_loadchannelregs(sc); 981 } 982 983 if (!ISSET(t->c_cflag, CHWFLOW)) { 984 /* Disable the high water mark. */ 985 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 986 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 987 sacom_schedrx(sc); 988 } 989 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 990 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 991 sacom_hwiflow(sc); 992 } 993 } 994 995 COM_UNLOCK(sc); 996 splx(s); 997 998 (void) (*tp->t_linesw->l_modem)(tp, 1); 999 1000 #ifdef COM_DEBUG 1001 if (sacom_debug) 1002 comstatus(sc, "comparam "); 1003 #endif 1004 1005 return (0); 1006 } 1007 1008 void 1009 sacom_iflush(sc) 1010 struct sacom_softc *sc; 1011 { 1012 bus_space_tag_t iot = sc->sc_iot; 1013 bus_space_handle_t ioh = sc->sc_ioh; 1014 #ifdef DIAGNOSTIC 1015 int reg; 1016 #endif 1017 int timo; 1018 1019 #ifdef DIAGNOSTIC 1020 reg = 0xffff; 1021 #endif 1022 timo = 50; 1023 /* flush any pending I/O */ 1024 if (sc->sc_cr3 & CR3_RXE) { 1025 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1026 && --timo) 1027 #ifdef DIAGNOSTIC 1028 reg = 1029 #else 1030 (void) 1031 #endif 1032 bus_space_read_4(iot, ioh, SACOM_DR); 1033 } 1034 #if 0 1035 /* XXX is it good idea to wait TX finish? */ 1036 if (sc->sc_cr3 & CR3_TXE) { 1037 timo = 500; 1038 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1039 && --timo) 1040 delay(100); 1041 } 1042 #endif 1043 #ifdef DIAGNOSTIC 1044 if (!timo) 1045 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1046 reg); 1047 #endif 1048 } 1049 1050 void 1051 sacom_loadchannelregs(sc) 1052 struct sacom_softc *sc; 1053 { 1054 bus_space_tag_t iot = sc->sc_iot; 1055 bus_space_handle_t ioh = sc->sc_ioh; 1056 1057 /* XXXXX necessary? */ 1058 sacom_iflush(sc); 1059 1060 /* Need to stop engines first. */ 1061 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1062 1063 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1064 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1065 1066 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1067 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1068 } 1069 1070 int 1071 sacomhwiflow(tp, block) 1072 struct tty *tp; 1073 int block; 1074 { 1075 #if 0 1076 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1077 int s; 1078 1079 if (COM_ISALIVE(sc) == 0) 1080 return (0); 1081 1082 if (sc->sc_mcr_rts == 0) 1083 return (0); 1084 1085 s = splserial(); 1086 COM_LOCK(sc); 1087 1088 if (block) { 1089 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1090 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1091 sacom_hwiflow(sc); 1092 } 1093 } else { 1094 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1095 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1096 sacom_schedrx(sc); 1097 } 1098 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1099 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1100 sacom_hwiflow(sc); 1101 } 1102 } 1103 1104 COM_UNLOCK(sc); 1105 splx(s); 1106 #endif 1107 return (1); 1108 } 1109 1110 /* 1111 * (un)block input via hw flowcontrol 1112 */ 1113 void 1114 sacom_hwiflow(sc) 1115 struct sacom_softc *sc; 1116 { 1117 #if 0 1118 bus_space_tag_t iot = sc->sc_iot; 1119 bus_space_handle_t ioh = sc->sc_ioh; 1120 1121 /* XXX implement */ 1122 #endif 1123 } 1124 1125 1126 void 1127 sacomstart(tp) 1128 struct tty *tp; 1129 { 1130 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1131 bus_space_tag_t iot = sc->sc_iot; 1132 bus_space_handle_t ioh = sc->sc_ioh; 1133 int s; 1134 1135 if (COM_ISALIVE(sc) == 0) 1136 return; 1137 1138 s = spltty(); 1139 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1140 goto out; 1141 1142 if (tp->t_outq.c_cc <= tp->t_lowat) { 1143 if (ISSET(tp->t_state, TS_ASLEEP)) { 1144 CLR(tp->t_state, TS_ASLEEP); 1145 wakeup(&tp->t_outq); 1146 } 1147 selwakeup(&tp->t_wsel); 1148 if (tp->t_outq.c_cc == 0) 1149 goto out; 1150 } 1151 1152 /* Grab the first contiguous region of buffer space. */ 1153 { 1154 u_char *tba; 1155 int tbc; 1156 1157 tba = tp->t_outq.c_cf; 1158 tbc = ndqb(&tp->t_outq, 0); 1159 1160 (void)splserial(); 1161 COM_LOCK(sc); 1162 1163 sc->sc_tba = tba; 1164 sc->sc_tbc = tbc; 1165 } 1166 1167 SET(tp->t_state, TS_BUSY); 1168 sc->sc_tx_busy = 1; 1169 1170 /* Enable transmit completion interrupts if necessary. */ 1171 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1172 SET(sc->sc_cr3, CR3_TIE); 1173 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1174 } 1175 1176 /* Output the first chunk of the contiguous buffer. */ 1177 sacom_filltx(sc); 1178 1179 COM_UNLOCK(sc); 1180 out: 1181 splx(s); 1182 return; 1183 } 1184 1185 void 1186 sacom_filltx(sc) 1187 struct sacom_softc *sc; 1188 { 1189 bus_space_tag_t iot = sc->sc_iot; 1190 bus_space_handle_t ioh = sc->sc_ioh; 1191 int c, n; 1192 1193 n = 0; 1194 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1195 & SR1_TNF) { 1196 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1197 break; 1198 c = *(sc->sc_tba + n); 1199 c &= 0xff; 1200 bus_space_write_4(iot, ioh, SACOM_DR, c); 1201 n++; 1202 } 1203 sc->sc_tbc -= n; 1204 sc->sc_tba += n; 1205 } 1206 1207 /* 1208 * Stop output on a line. 1209 */ 1210 void 1211 sacomstop(tp, flag) 1212 struct tty *tp; 1213 int flag; 1214 { 1215 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1216 int s; 1217 1218 s = splserial(); 1219 COM_LOCK(sc); 1220 if (ISSET(tp->t_state, TS_BUSY)) { 1221 /* Stop transmitting at the next chunk. */ 1222 sc->sc_tbc = 0; 1223 sc->sc_heldtbc = 0; 1224 if (!ISSET(tp->t_state, TS_TTSTOP)) 1225 SET(tp->t_state, TS_FLUSH); 1226 } 1227 COM_UNLOCK(sc); 1228 splx(s); 1229 } 1230 1231 static inline void 1232 sacom_rxsoft(sc, tp) 1233 struct sacom_softc *sc; 1234 struct tty *tp; 1235 { 1236 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1237 u_char *get, *end; 1238 u_int cc, scc; 1239 u_char sr1; 1240 int code; 1241 int s; 1242 1243 end = sc->sc_ebuf; 1244 get = sc->sc_rbget; 1245 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1246 1247 while (cc) { 1248 code = get[0]; 1249 sr1 = get[1]; 1250 if (ISSET(sr1, SR1_FRE)) 1251 SET(code, TTY_FE); 1252 if (ISSET(sr1, SR1_PRE)) 1253 SET(code, TTY_PE); 1254 if ((*rint)(code, tp) == -1) { 1255 /* 1256 * The line discipline's buffer is out of space. 1257 */ 1258 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1259 /* 1260 * We're either not using flow control, or the 1261 * line discipline didn't tell us to block for 1262 * some reason. Either way, we have no way to 1263 * know when there's more space available, so 1264 * just drop the rest of the data. 1265 */ 1266 get += cc << 1; 1267 if (get >= end) 1268 get -= SACOM_RING_SIZE << 1; 1269 cc = 0; 1270 } else { 1271 /* 1272 * Don't schedule any more receive processing 1273 * until the line discipline tells us there's 1274 * space available (through comhwiflow()). 1275 * Leave the rest of the data in the input 1276 * buffer. 1277 */ 1278 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1279 } 1280 break; 1281 } 1282 get += 2; 1283 if (get >= end) 1284 get = sc->sc_rbuf; 1285 cc--; 1286 } 1287 1288 if (cc != scc) { 1289 sc->sc_rbget = get; 1290 s = splserial(); 1291 COM_LOCK(sc); 1292 1293 cc = sc->sc_rbavail += scc - cc; 1294 /* Buffers should be ok again, release possible block. */ 1295 if (cc >= 1) { 1296 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1297 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1298 SET(sc->sc_cr3, CR3_RIE); 1299 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1300 SACOM_CR3, sc->sc_cr3); 1301 } 1302 } 1303 COM_UNLOCK(sc); 1304 splx(s); 1305 } 1306 } 1307 1308 static inline void 1309 sacom_txsoft(sc, tp) 1310 struct sacom_softc *sc; 1311 struct tty *tp; 1312 { 1313 1314 CLR(tp->t_state, TS_BUSY); 1315 if (ISSET(tp->t_state, TS_FLUSH)) 1316 CLR(tp->t_state, TS_FLUSH); 1317 else 1318 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1319 (*tp->t_linesw->l_start)(tp); 1320 } 1321 1322 static inline void 1323 sacom_stsoft(sc, tp) 1324 struct sacom_softc *sc; 1325 struct tty *tp; 1326 { 1327 } 1328 1329 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1330 void 1331 sacomsoft(arg) 1332 void *arg; 1333 { 1334 struct sacom_softc *sc = arg; 1335 struct tty *tp; 1336 1337 if (COM_ISALIVE(sc) == 0) 1338 return; 1339 1340 { 1341 #else 1342 void 1343 sacomsoft() 1344 { 1345 struct sacom_softc *sc; 1346 struct tty *tp; 1347 int unit; 1348 1349 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1350 sc = device_lookup(&sacom_cd, unit); 1351 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1352 continue; 1353 1354 if (COM_ISALIVE(sc) == 0) 1355 continue; 1356 1357 tp = sc->sc_tty; 1358 if (tp == NULL) 1359 continue; 1360 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1361 continue; 1362 #endif 1363 tp = sc->sc_tty; 1364 1365 if (sc->sc_rx_ready) { 1366 sc->sc_rx_ready = 0; 1367 sacom_rxsoft(sc, tp); 1368 } 1369 1370 if (sc->sc_st_check) { 1371 sc->sc_st_check = 0; 1372 sacom_stsoft(sc, tp); 1373 } 1374 1375 if (sc->sc_tx_done) { 1376 sc->sc_tx_done = 0; 1377 sacom_txsoft(sc, tp); 1378 } 1379 } 1380 1381 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1382 #endif 1383 } 1384 1385 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1386 /* there has got to be a better way to do comsoft() */ 1387 }} 1388 #endif 1389 1390 int 1391 sacomintr(arg) 1392 void *arg; 1393 { 1394 struct sacom_softc *sc = arg; 1395 bus_space_tag_t iot = sc->sc_iot; 1396 bus_space_handle_t ioh = sc->sc_ioh; 1397 u_char *put, *end; 1398 u_int cc; 1399 u_int sr0, sr1; 1400 1401 if (COM_ISALIVE(sc) == 0) 1402 return (0); 1403 1404 COM_LOCK(sc); 1405 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1406 if (! sr0) { 1407 COM_UNLOCK(sc); 1408 return (0); 1409 } 1410 if (ISSET(sr0, SR0_EIF)) 1411 /* XXX silently discard error bits */ 1412 bus_space_read_4(iot, ioh, SACOM_DR); 1413 if (ISSET(sr0, SR0_RBB)) 1414 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1415 if (ISSET(sr0, SR0_REB)) { 1416 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1417 #if defined(DDB) || defined(KGDB) 1418 #ifndef DDB_BREAK_CHAR 1419 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1420 console_debugger(); 1421 } 1422 #endif 1423 #endif /* DDB || KGDB */ 1424 } 1425 1426 1427 end = sc->sc_ebuf; 1428 put = sc->sc_rbput; 1429 cc = sc->sc_rbavail; 1430 1431 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1432 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1433 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1434 while (cc > 0) { 1435 if (!ISSET(sr1, SR1_RNE)) { 1436 bus_space_write_4(iot, ioh, SACOM_SR0, 1437 SR0_RID); 1438 break; 1439 } 1440 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1441 put[1] = sr1; 1442 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1443 if (put[0] == DDB_BREAK_CHAR && 1444 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1445 console_debugger(); 1446 1447 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1448 continue; 1449 } 1450 #endif 1451 put += 2; 1452 if (put >= end) 1453 put = sc->sc_rbuf; 1454 cc--; 1455 1456 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1457 } 1458 1459 /* 1460 * Current string of incoming characters ended because 1461 * no more data was available or we ran out of space. 1462 * Schedule a receive event if any data was received. 1463 * If we're out of space, turn off receive interrupts. 1464 */ 1465 sc->sc_rbput = put; 1466 sc->sc_rbavail = cc; 1467 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1468 sc->sc_rx_ready = 1; 1469 1470 /* XXX do RX hardware flow control */ 1471 1472 /* 1473 * If we're out of space, disable receive interrupts 1474 * until the queue has drained a bit. 1475 */ 1476 if (!cc) { 1477 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1478 CLR(sc->sc_cr3, CR3_RIE); 1479 bus_space_write_4(iot, ioh, SACOM_CR3, 1480 sc->sc_cr3); 1481 } 1482 } else { 1483 #ifdef DIAGNOSTIC 1484 panic("sacomintr: we shouldn't reach here"); 1485 #endif 1486 CLR(sc->sc_cr3, CR3_RIE); 1487 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1488 } 1489 } 1490 1491 /* 1492 * Done handling any receive interrupts. See if data can be 1493 * transmitted as well. Schedule tx done event if no data left 1494 * and tty was marked busy. 1495 */ 1496 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1497 if (ISSET(sr0, SR0_TFS)) { 1498 /* 1499 * If we've delayed a parameter change, do it now, and restart 1500 * output. 1501 * XXX sacom_loadchanelregs() waits TX completion, 1502 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1503 */ 1504 if (sc->sc_heldchange) { 1505 sacom_loadchannelregs(sc); 1506 sc->sc_heldchange = 0; 1507 sc->sc_tbc = sc->sc_heldtbc; 1508 sc->sc_heldtbc = 0; 1509 } 1510 1511 /* Output the next chunk of the contiguous buffer, if any. */ 1512 if (sc->sc_tbc > 0) { 1513 sacom_filltx(sc); 1514 } else { 1515 /* Disable transmit completion interrupts if necessary. */ 1516 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1517 CLR(sc->sc_cr3, CR3_TIE); 1518 bus_space_write_4(iot, ioh, SACOM_CR3, 1519 sc->sc_cr3); 1520 } 1521 if (sc->sc_tx_busy) { 1522 sc->sc_tx_busy = 0; 1523 sc->sc_tx_done = 1; 1524 } 1525 } 1526 } 1527 COM_UNLOCK(sc); 1528 1529 /* Wake up the poller. */ 1530 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1531 softintr_schedule(sc->sc_si); 1532 #else 1533 setsoftserial(); 1534 #endif 1535 1536 #if NRND > 0 && defined(RND_COM) 1537 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1538 #endif 1539 return (1); 1540 } 1541 1542 static void 1543 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1544 1545 /* XXX this should be done at sc->enable function */ 1546 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1547 SAGPIO_PCR, 0xa0000); 1548 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1549 SAGPIO_PSR, 0x100); 1550 } 1551 1552 /* Initialization for serial console */ 1553 int 1554 sacominit(iot, iobase, baud, cflag, iohp) 1555 bus_space_tag_t iot; 1556 bus_addr_t iobase; 1557 int baud; 1558 tcflag_t cflag; 1559 bus_space_handle_t *iohp; 1560 { 1561 int brd, cr0; 1562 1563 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1564 printf("register map failed\n"); 1565 1566 /* wait for the Tx queue to drain and disable the UART */ 1567 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1568 ; 1569 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1570 1571 cr0 = cflag2cr0(cflag); 1572 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1573 1574 brd = SACOMSPEED(baud); 1575 sacomconsrate = baud; 1576 sacomconsaddr = iobase; 1577 sacomconscflag = cflag; 1578 /* XXX assumes little endian */ 1579 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1580 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1581 1582 /* enable the UART */ 1583 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1584 1585 return (0); 1586 } 1587 1588 void 1589 sacomcnprobe(cp) 1590 struct consdev *cp; 1591 { 1592 cp->cn_pri = CN_REMOTE; 1593 } 1594 1595 void 1596 sacomcninit(cp) 1597 struct consdev *cp; 1598 { 1599 if (cp == NULL) { 1600 /* XXX cp == NULL means that MMU is disabled. */ 1601 sacomconsioh = SACOM3_HW_BASE; 1602 sacomconstag = &sa11x0_bs_tag; 1603 cn_tab = &sacomcons; 1604 return; 1605 } 1606 1607 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1608 CONMODE, &sacomconsioh)) 1609 panic("can't init serial console @%x", CONADDR); 1610 cn_tab = &sacomcons; 1611 sacomconstag = &sa11x0_bs_tag; 1612 } 1613 1614 int 1615 sacomcngetc(dev) 1616 dev_t dev; 1617 { 1618 int c, s; 1619 1620 s = spltty(); /* XXX do we need this? */ 1621 1622 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1623 & SR1_RNE)) { 1624 #if defined(DDB) || defined(KGDB) 1625 #ifndef DDB_BREAK_CHAR 1626 u_int sr0; 1627 extern int db_active; 1628 1629 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1630 if (ISSET(sr0, SR0_RBB)) 1631 bus_space_write_4(sacomconstag, sacomconsioh, 1632 SACOM_SR0, SR0_RBB); 1633 if (ISSET(sr0, SR0_REB)) { 1634 bus_space_write_4(sacomconstag, sacomconsioh, 1635 SACOM_SR0, SR0_REB); 1636 if (db_active == 0) 1637 console_debugger(); 1638 } 1639 #endif 1640 #endif /* DDB || KGDB */ 1641 } 1642 1643 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1644 c &= 0xff; 1645 splx(s); 1646 1647 return (c); 1648 } 1649 1650 void 1651 sacomcnputc(dev, c) 1652 dev_t dev; 1653 int c; 1654 { 1655 int s; 1656 1657 s = spltty(); /* XXX do we need this? */ 1658 1659 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1660 & SR1_TNF)) 1661 ; 1662 1663 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1664 splx(s); 1665 } 1666 1667 void 1668 sacomcnpollc(dev, on) 1669 dev_t dev; 1670 int on; 1671 { 1672 1673 } 1674 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 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 Fri Oct 03 02:09:57 GMT 2025