sa11x0_com.c revision 1.18
1 /* $NetBSD: sa11x0_com.c,v 1.18 2003/07/15 00:24:50 lukem 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 <sys/cdefs.h> 78 __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.18 2003/07/15 00:24:50 lukem Exp $"); 79 80 #include "opt_com.h" 81 #include "opt_ddb.h" 82 #include "opt_ddbparam.h" 83 #include "opt_kgdb.h" 84 #include "opt_multiprocessor.h" 85 #include "opt_lockdebug.h" 86 87 #include "rnd.h" 88 #if NRND > 0 && defined(RND_COM) 89 #include <sys/rnd.h> 90 #endif 91 92 #include <sys/param.h> 93 #include <sys/systm.h> 94 #include <sys/types.h> 95 #include <sys/conf.h> 96 #include <sys/file.h> 97 #include <sys/device.h> 98 #include <sys/kernel.h> 99 #include <sys/malloc.h> 100 #include <sys/tty.h> 101 #include <sys/uio.h> 102 #include <sys/vnode.h> 103 104 #include <dev/cons.h> 105 106 #include <machine/bus.h> 107 #include <arm/sa11x0/sa11x0_reg.h> 108 #include <arm/sa11x0/sa11x0_var.h> 109 #include <arm/sa11x0/sa11x0_comreg.h> 110 #include <arm/sa11x0/sa11x0_comvar.h> 111 #include <arm/sa11x0/sa11x0_gpioreg.h> 112 113 #ifdef hpcarm 114 #include <hpc/include/platid.h> 115 #include <hpc/include/platid_mask.h> 116 #endif 117 118 #include "sacom.h" 119 120 dev_type_open(sacomopen); 121 dev_type_close(sacomclose); 122 dev_type_read(sacomread); 123 dev_type_write(sacomwrite); 124 dev_type_ioctl(sacomioctl); 125 dev_type_stop(sacomstop); 126 dev_type_tty(sacomtty); 127 dev_type_poll(sacompoll); 128 129 const struct cdevsw sacom_cdevsw = { 130 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 131 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 132 }; 133 134 static int sacom_match(struct device *, struct cfdata *, void *); 135 static void sacom_attach(struct device *, struct device *, void *); 136 static void sacom_filltx(struct sacom_softc *); 137 static void sacom_attach_subr(struct sacom_softc *); 138 #if defined(DDB) || defined(KGDB) 139 static void sacom_enable_debugport(struct sacom_softc *); 140 #endif 141 int sacom_detach(struct device *, int); 142 void sacom_config(struct sacom_softc *); 143 int sacom_activate(struct device *, enum devact); 144 void sacom_shutdown(struct sacom_softc *); 145 static u_int cflag2cr0(tcflag_t); 146 int sacomparam(struct tty *, struct termios *); 147 void sacomstart(struct tty *); 148 int sacomhwiflow(struct tty *, int); 149 150 void sacom_loadchannelregs(struct sacom_softc *); 151 void sacom_hwiflow(struct sacom_softc *); 152 void sacom_break(struct sacom_softc *, int); 153 void sacom_modem(struct sacom_softc *, int); 154 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 155 int sacom_to_tiocm(struct sacom_softc *); 156 void sacom_iflush(struct sacom_softc *); 157 158 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 159 bus_space_handle_t *); 160 int sacom_is_console(bus_space_tag_t, bus_addr_t, 161 bus_space_handle_t *); 162 163 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 164 void sacomsoft(void *); 165 #else 166 void sacomsoft(void); 167 #endif 168 169 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 170 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 171 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 172 static inline void sacom_schedrx(struct sacom_softc *); 173 174 #ifdef hpcarm 175 /* HPCARM specific functions */ 176 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 177 #endif 178 179 #define COMUNIT_MASK 0x7ffff 180 #define COMDIALOUT_MASK 0x80000 181 182 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 183 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 184 185 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 186 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 187 188 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 189 #define COM_LOCK(sc) 190 #define COM_UNLOCK(sc) 191 192 #define SET(t, f) (t) |= (f) 193 #define CLR(t, f) (t) &= ~(f) 194 #define ISSET(t, f) ((t) & (f)) 195 196 int sacomintr(void *); 197 int sacomcngetc(dev_t); 198 void sacomcnputc(dev_t, int); 199 void sacomcnpollc(dev_t, int); 200 201 void sacomcnprobe(struct consdev *); 202 void sacomcninit(struct consdev *); 203 204 extern struct bus_space sa11x0_bs_tag; 205 206 static bus_space_tag_t sacomconstag; 207 static bus_space_handle_t sacomconsioh; 208 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 209 210 static int sacomconsattached; 211 static int sacomconsrate; 212 static tcflag_t sacomconscflag; 213 214 CFATTACH_DECL(sacom, sizeof(struct sacom_softc), 215 sacom_match, sacom_attach, NULL, NULL); 216 extern struct cfdriver sacom_cd; 217 218 #ifdef hpcarm 219 struct platid_data sacom_platid_table[] = { 220 { &platid_mask_MACH_HP_JORNADA_720, sacom_j720_init }, 221 { &platid_mask_MACH_HP_JORNADA_720JP, sacom_j720_init }, 222 { NULL, NULL } 223 }; 224 #endif 225 226 struct consdev sacomcons = { 227 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 228 NULL, NULL, NODEV, CN_NORMAL 229 }; 230 231 #ifndef CONMODE 232 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 233 #endif 234 #ifndef CONSPEED 235 #define CONSPEED 9600 236 #endif 237 #ifndef CONADDR 238 #define CONADDR SACOM3_BASE 239 #endif 240 241 static int 242 sacom_match(parent, match, aux) 243 struct device *parent; 244 struct cfdata *match; 245 void *aux; 246 { 247 return (1); 248 } 249 250 void 251 sacom_attach(parent, self, aux) 252 struct device *parent; 253 struct device *self; 254 void *aux; 255 { 256 struct sacom_softc *sc = (struct sacom_softc*)self; 257 struct sa11x0_attach_args *sa = aux; 258 259 #ifdef hpcarm 260 struct platid_data *p; 261 void (*mdinit)(struct device *, struct sacom_softc *); 262 #endif 263 264 printf("\n"); 265 266 sc->sc_iot = sa->sa_iot; 267 sc->sc_baseaddr = sa->sa_addr; 268 269 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 270 &sc->sc_ioh)) { 271 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 272 return; 273 } 274 275 printf("%s: ", sc->sc_dev.dv_xname); 276 switch(sc->sc_baseaddr) { 277 case 0x80050000: 278 printf("SA11x0 UART3\n"); 279 break; 280 case 0x80010000: 281 printf("SA11x0 UART1\n"); 282 break; 283 case 0x80030000: 284 printf("SA11x0 UART2 (IRDA)\n"); 285 break; 286 default: 287 printf("unknown SA11x0 UART\n"); 288 break; 289 } 290 291 sacom_attach_subr(sc); 292 293 #ifdef hpcarm 294 /* Do hpcarm specific initialization, if any */ 295 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 296 mdinit = p->data; 297 (mdinit)(parent, sc); 298 } 299 #endif 300 301 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 302 } 303 304 void 305 sacom_attach_subr(sc) 306 struct sacom_softc *sc; 307 { 308 bus_addr_t iobase = sc->sc_baseaddr; 309 bus_space_tag_t iot = sc->sc_iot; 310 struct tty *tp; 311 312 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 313 simple_lock_init(&sc->sc_lock); 314 #endif 315 316 /* XXX Do we need to disable interrupts here? */ 317 318 if (iot == sacomconstag && iobase == sacomconsaddr) { 319 sacomconsattached = 1; 320 sc->sc_speed = SACOMSPEED(sacomconsrate); 321 322 /* Make sure the console is always "hardwired". */ 323 delay(10000); /* wait for output to finish */ 324 SET(sc->sc_hwflags, COM_HW_CONSOLE); 325 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 326 } 327 328 tp = ttymalloc(); 329 tp->t_oproc = sacomstart; 330 tp->t_param = sacomparam; 331 tp->t_hwiflow = sacomhwiflow; 332 333 sc->sc_tty = tp; 334 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 335 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 336 sc->sc_rbavail = SACOM_RING_SIZE; 337 if (sc->sc_rbuf == NULL) { 338 printf("%s: unable to allocate ring buffer\n", 339 sc->sc_dev.dv_xname); 340 return; 341 } 342 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 343 sc->sc_tbc = 0; 344 345 tty_attach(tp); 346 347 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 348 int maj; 349 350 /* locate the major number */ 351 maj = cdevsw_lookup_major(&sacom_cdevsw); 352 353 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 354 355 delay(10000); /* XXX */ 356 printf("%s: console\n", sc->sc_dev.dv_xname); 357 delay(10000); /* XXX */ 358 } 359 360 361 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 362 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 363 #endif 364 365 #if NRND > 0 && defined(RND_COM) 366 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 367 RND_TYPE_TTY, 0); 368 #endif 369 370 /* if there are no enable/disable functions, assume the device 371 is always enabled */ 372 if (!sc->enable) 373 sc->enabled = 1; 374 375 sacom_config(sc); 376 377 SET(sc->sc_hwflags, COM_HW_DEV_OK); 378 } 379 380 /* This is necessary when dynamically changing SAIP configuration. */ 381 int 382 sacom_detach(self, flags) 383 struct device *self; 384 int flags; 385 { 386 struct sacom_softc *sc = (struct sacom_softc *)self; 387 int maj, mn; 388 389 /* locate the major number */ 390 maj = cdevsw_lookup_major(&sacom_cdevsw); 391 392 /* Nuke the vnodes for any open instances. */ 393 mn = self->dv_unit; 394 vdevgone(maj, mn, mn, VCHR); 395 396 mn |= COMDIALOUT_MASK; 397 vdevgone(maj, mn, mn, VCHR); 398 399 /* Free the receive buffer. */ 400 free(sc->sc_rbuf, M_DEVBUF); 401 402 /* Detach and free the tty. */ 403 tty_detach(sc->sc_tty); 404 ttyfree(sc->sc_tty); 405 406 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 407 /* Unhook the soft interrupt handler. */ 408 softintr_disestablish(sc->sc_si); 409 #endif 410 411 #if NRND > 0 && defined(RND_COM) 412 /* Unhook the entropy source. */ 413 rnd_detach_source(&sc->rnd_source); 414 #endif 415 416 return (0); 417 } 418 419 void 420 sacom_config(sc) 421 struct sacom_softc *sc; 422 { 423 bus_space_tag_t iot = sc->sc_iot; 424 bus_space_handle_t ioh = sc->sc_ioh; 425 426 /* Disable engine before configuring the device. */ 427 sc->sc_cr3 = 0; 428 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 429 430 #ifdef DDB 431 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 432 sacom_enable_debugport(sc); 433 #endif 434 } 435 436 #ifdef DDB 437 static void 438 sacom_enable_debugport(sc) 439 struct sacom_softc *sc; 440 { 441 bus_space_tag_t iot = sc->sc_iot; 442 bus_space_handle_t ioh = sc->sc_ioh; 443 int s; 444 445 s = splserial(); 446 COM_LOCK(sc); 447 sc->sc_cr3 = CR3_RXE | CR3_TXE; 448 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 449 COM_UNLOCK(sc); 450 splx(s); 451 } 452 #endif 453 454 int 455 sacom_activate(self, act) 456 struct device *self; 457 enum devact act; 458 { 459 struct sacom_softc *sc = (struct sacom_softc *)self; 460 int s, rv = 0; 461 462 s = splserial(); 463 COM_LOCK(sc); 464 switch (act) { 465 case DVACT_ACTIVATE: 466 rv = EOPNOTSUPP; 467 break; 468 469 case DVACT_DEACTIVATE: 470 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 471 rv = EBUSY; 472 break; 473 } 474 475 if (sc->disable != NULL && sc->enabled != 0) { 476 (*sc->disable)(sc); 477 sc->enabled = 0; 478 } 479 break; 480 } 481 482 COM_UNLOCK(sc); 483 splx(s); 484 return (rv); 485 } 486 487 void 488 sacom_shutdown(sc) 489 struct sacom_softc *sc; 490 { 491 struct tty *tp = sc->sc_tty; 492 int s; 493 494 s = splserial(); 495 COM_LOCK(sc); 496 497 /* Clear any break condition set with TIOCSBRK. */ 498 sacom_break(sc, 0); 499 500 /* 501 * Hang up if necessary. Wait a bit, so the other side has time to 502 * notice even if we immediately open the port again. 503 * Avoid tsleeping above splhigh(). 504 */ 505 if (ISSET(tp->t_cflag, HUPCL)) { 506 sacom_modem(sc, 0); 507 COM_UNLOCK(sc); 508 splx(s); 509 /* XXX tsleep will only timeout */ 510 (void) tsleep(sc, TTIPRI, ttclos, hz); 511 s = splserial(); 512 COM_LOCK(sc); 513 } 514 515 /* Turn off interrupts. */ 516 sc->sc_cr3 = 0; 517 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 518 519 if (sc->disable) { 520 #ifdef DIAGNOSTIC 521 if (!sc->enabled) 522 panic("sacom_shutdown: not enabled?"); 523 #endif 524 (*sc->disable)(sc); 525 sc->enabled = 0; 526 } 527 COM_UNLOCK(sc); 528 splx(s); 529 } 530 531 int 532 sacomopen(dev, flag, mode, p) 533 dev_t dev; 534 int flag, mode; 535 struct proc *p; 536 { 537 struct sacom_softc *sc; 538 struct tty *tp; 539 int s, s2; 540 int error; 541 542 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 543 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 544 sc->sc_rbuf == NULL) 545 return (ENXIO); 546 547 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 548 return (ENXIO); 549 550 tp = sc->sc_tty; 551 552 if (ISSET(tp->t_state, TS_ISOPEN) && 553 ISSET(tp->t_state, TS_XCLUDE) && 554 p->p_ucred->cr_uid != 0) 555 return (EBUSY); 556 557 s = spltty(); 558 559 /* 560 * Do the following iff this is a first open. 561 */ 562 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 563 struct termios t; 564 565 tp->t_dev = dev; 566 567 s2 = splserial(); 568 COM_LOCK(sc); 569 570 if (sc->enable) { 571 if ((*sc->enable)(sc)) { 572 COM_UNLOCK(sc); 573 splx(s2); 574 splx(s); 575 printf("%s: device enable failed\n", 576 sc->sc_dev.dv_xname); 577 return (EIO); 578 } 579 sc->enabled = 1; 580 sacom_config(sc); 581 } 582 583 /* Turn on interrupts. */ 584 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 585 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 586 sc->sc_cr3); 587 588 589 COM_UNLOCK(sc); 590 splx(s2); 591 592 /* 593 * Initialize the termios status to the defaults. Add in the 594 * sticky bits from TIOCSFLAGS. 595 */ 596 t.c_ispeed = 0; 597 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 598 t.c_ospeed = sacomconsrate; 599 t.c_cflag = sacomconscflag; 600 } else { 601 t.c_ospeed = TTYDEF_SPEED; 602 t.c_cflag = TTYDEF_CFLAG; 603 } 604 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 605 SET(t.c_cflag, CLOCAL); 606 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 607 SET(t.c_cflag, CRTSCTS); 608 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 609 SET(t.c_cflag, MDMBUF); 610 /* Make sure sacomparam() will do something. */ 611 tp->t_ospeed = 0; 612 (void) sacomparam(tp, &t); 613 tp->t_iflag = TTYDEF_IFLAG; 614 tp->t_oflag = TTYDEF_OFLAG; 615 tp->t_lflag = TTYDEF_LFLAG; 616 ttychars(tp); 617 ttsetwater(tp); 618 619 s2 = splserial(); 620 COM_LOCK(sc); 621 622 /* 623 * Turn on DTR. We must always do this, even if carrier is not 624 * present, because otherwise we'd have to use TIOCSDTR 625 * immediately after setting CLOCAL, which applications do not 626 * expect. We always assert DTR while the device is open 627 * unless explicitly requested to deassert it. 628 */ 629 sacom_modem(sc, 1); 630 631 /* Clear the input ring, and unblock. */ 632 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 633 sc->sc_rbavail = SACOM_RING_SIZE; 634 sacom_iflush(sc); 635 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 636 sacom_hwiflow(sc); 637 638 #ifdef COM_DEBUG 639 if (sacom_debug) 640 comstatus(sc, "sacomopen "); 641 #endif 642 643 COM_UNLOCK(sc); 644 splx(s2); 645 } 646 647 splx(s); 648 649 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 650 if (error) 651 goto bad; 652 653 error = (*tp->t_linesw->l_open)(dev, tp); 654 if (error) 655 goto bad; 656 657 return (0); 658 659 bad: 660 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 661 /* 662 * We failed to open the device, and nobody else had it opened. 663 * Clean up the state as appropriate. 664 */ 665 sacom_shutdown(sc); 666 } 667 668 return (error); 669 } 670 671 int 672 sacomclose(dev, flag, mode, p) 673 dev_t dev; 674 int flag, mode; 675 struct proc *p; 676 { 677 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 678 struct tty *tp = sc->sc_tty; 679 680 /* XXX This is for cons.c. */ 681 if (!ISSET(tp->t_state, TS_ISOPEN)) 682 return (0); 683 684 (*tp->t_linesw->l_close)(tp, flag); 685 ttyclose(tp); 686 687 if (COM_ISALIVE(sc) == 0) 688 return (0); 689 690 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 691 /* 692 * Although we got a last close, the device may still be in 693 * use; e.g. if this was the dialout node, and there are still 694 * processes waiting for carrier on the non-dialout node. 695 */ 696 sacom_shutdown(sc); 697 } 698 699 return (0); 700 } 701 702 int 703 sacomread(dev, uio, flag) 704 dev_t dev; 705 struct uio *uio; 706 int flag; 707 { 708 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 709 struct tty *tp = sc->sc_tty; 710 711 if (COM_ISALIVE(sc) == 0) 712 return (EIO); 713 714 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 715 } 716 717 int 718 sacomwrite(dev, uio, flag) 719 dev_t dev; 720 struct uio *uio; 721 int flag; 722 { 723 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 724 struct tty *tp = sc->sc_tty; 725 726 if (COM_ISALIVE(sc) == 0) 727 return (EIO); 728 729 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 730 } 731 732 int 733 sacompoll(dev, events, p) 734 dev_t dev; 735 int events; 736 struct proc *p; 737 { 738 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 739 struct tty *tp = sc->sc_tty; 740 741 if (COM_ISALIVE(sc) == 0) 742 return (EIO); 743 744 return ((*tp->t_linesw->l_poll)(tp, events, p)); 745 } 746 747 struct tty * 748 sacomtty(dev) 749 dev_t dev; 750 { 751 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 752 struct tty *tp = sc->sc_tty; 753 754 return (tp); 755 } 756 757 int 758 sacomioctl(dev, cmd, data, flag, p) 759 dev_t dev; 760 u_long cmd; 761 caddr_t data; 762 int flag; 763 struct proc *p; 764 { 765 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 766 struct tty *tp = sc->sc_tty; 767 int error; 768 int s; 769 770 if (COM_ISALIVE(sc) == 0) 771 return (EIO); 772 773 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 774 if (error != EPASSTHROUGH) 775 return (error); 776 777 error = ttioctl(tp, cmd, data, flag, p); 778 if (error != EPASSTHROUGH) 779 return (error); 780 781 error = 0; 782 783 s = splserial(); 784 COM_LOCK(sc); 785 786 switch (cmd) { 787 case TIOCSBRK: 788 sacom_break(sc, 1); 789 break; 790 791 case TIOCCBRK: 792 sacom_break(sc, 0); 793 break; 794 795 case TIOCSDTR: 796 sacom_modem(sc, 1); 797 break; 798 799 case TIOCCDTR: 800 sacom_modem(sc, 0); 801 break; 802 803 case TIOCGFLAGS: 804 *(int *)data = sc->sc_swflags; 805 break; 806 807 case TIOCSFLAGS: 808 error = suser(p->p_ucred, &p->p_acflag); 809 if (error) 810 break; 811 sc->sc_swflags = *(int *)data; 812 break; 813 814 case TIOCMSET: 815 case TIOCMBIS: 816 case TIOCMBIC: 817 tiocm_to_sacom(sc, cmd, *(int *)data); 818 break; 819 820 case TIOCMGET: 821 *(int *)data = sacom_to_tiocm(sc); 822 break; 823 824 default: 825 error = EPASSTHROUGH; 826 break; 827 } 828 829 COM_UNLOCK(sc); 830 splx(s); 831 832 #ifdef COM_DEBUG 833 if (sacom_debug) 834 comstatus(sc, "comioctl "); 835 #endif 836 837 return (error); 838 } 839 840 static inline void 841 sacom_schedrx(sc) 842 struct sacom_softc *sc; 843 { 844 845 sc->sc_rx_ready = 1; 846 847 /* Wake up the poller. */ 848 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 849 softintr_schedule(sc->sc_si); 850 #else 851 setsoftserial(); 852 #endif 853 } 854 855 void 856 sacom_break(sc, onoff) 857 struct sacom_softc *sc; 858 int onoff; 859 { 860 861 if (onoff) 862 SET(sc->sc_cr3, CR3_BRK); 863 else 864 CLR(sc->sc_cr3, CR3_BRK); 865 866 if (!sc->sc_heldchange) { 867 if (sc->sc_tx_busy) { 868 sc->sc_heldtbc = sc->sc_tbc; 869 sc->sc_tbc = 0; 870 sc->sc_heldchange = 1; 871 } else 872 sacom_loadchannelregs(sc); 873 } 874 } 875 876 void 877 sacom_modem(sc, onoff) 878 struct sacom_softc *sc; 879 int onoff; 880 { 881 if (!sc->sc_heldchange) { 882 if (sc->sc_tx_busy) { 883 sc->sc_heldtbc = sc->sc_tbc; 884 sc->sc_tbc = 0; 885 sc->sc_heldchange = 1; 886 } else 887 sacom_loadchannelregs(sc); 888 } 889 } 890 891 void 892 tiocm_to_sacom(sc, how, ttybits) 893 struct sacom_softc *sc; 894 u_long how; 895 int ttybits; 896 { 897 } 898 899 int 900 sacom_to_tiocm(sc) 901 struct sacom_softc *sc; 902 { 903 int ttybits = 0; 904 905 if (sc->sc_cr3 != 0) 906 SET(ttybits, TIOCM_LE); 907 908 return (ttybits); 909 } 910 911 static u_int 912 cflag2cr0(cflag) 913 tcflag_t cflag; 914 { 915 u_int cr0; 916 917 cr0 = (cflag & PARENB) ? CR0_PE : 0; 918 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 919 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 920 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 921 922 return (cr0); 923 } 924 925 int 926 sacomparam(tp, t) 927 struct tty *tp; 928 struct termios *t; 929 { 930 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 931 int ospeed = SACOMSPEED(t->c_ospeed); 932 u_int cr0; 933 int s; 934 935 if (COM_ISALIVE(sc) == 0) 936 return (EIO); 937 938 /* Check requested parameters. */ 939 if (ospeed < 0) 940 return (EINVAL); 941 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 942 return (EINVAL); 943 944 /* 945 * For the console, always force CLOCAL and !HUPCL, so that the port 946 * is always active. 947 */ 948 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 949 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 950 SET(t->c_cflag, CLOCAL); 951 CLR(t->c_cflag, HUPCL); 952 } 953 954 /* 955 * If there were no changes, don't do anything. This avoids dropping 956 * input and improves performance when all we did was frob things like 957 * VMIN and VTIME. 958 */ 959 if (tp->t_ospeed == t->c_ospeed && 960 tp->t_cflag == t->c_cflag) 961 return (0); 962 963 cr0 = cflag2cr0(t->c_cflag); 964 965 s = splserial(); 966 COM_LOCK(sc); 967 968 sc->sc_cr0 = cr0; 969 970 sc->sc_speed = ospeed; 971 972 /* And copy to tty. */ 973 tp->t_ispeed = 0; 974 tp->t_ospeed = t->c_ospeed; 975 tp->t_cflag = t->c_cflag; 976 977 if (!sc->sc_heldchange) { 978 if (sc->sc_tx_busy) { 979 sc->sc_heldtbc = sc->sc_tbc; 980 sc->sc_tbc = 0; 981 sc->sc_heldchange = 1; 982 } else 983 sacom_loadchannelregs(sc); 984 } 985 986 if (!ISSET(t->c_cflag, CHWFLOW)) { 987 /* Disable the high water mark. */ 988 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 989 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 990 sacom_schedrx(sc); 991 } 992 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 993 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 994 sacom_hwiflow(sc); 995 } 996 } 997 998 COM_UNLOCK(sc); 999 splx(s); 1000 1001 (void) (*tp->t_linesw->l_modem)(tp, 1); 1002 1003 #ifdef COM_DEBUG 1004 if (sacom_debug) 1005 comstatus(sc, "comparam "); 1006 #endif 1007 1008 return (0); 1009 } 1010 1011 void 1012 sacom_iflush(sc) 1013 struct sacom_softc *sc; 1014 { 1015 bus_space_tag_t iot = sc->sc_iot; 1016 bus_space_handle_t ioh = sc->sc_ioh; 1017 #ifdef DIAGNOSTIC 1018 int reg; 1019 #endif 1020 int timo; 1021 1022 #ifdef DIAGNOSTIC 1023 reg = 0xffff; 1024 #endif 1025 timo = 50; 1026 /* flush any pending I/O */ 1027 if (sc->sc_cr3 & CR3_RXE) { 1028 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1029 && --timo) 1030 #ifdef DIAGNOSTIC 1031 reg = 1032 #else 1033 (void) 1034 #endif 1035 bus_space_read_4(iot, ioh, SACOM_DR); 1036 } 1037 #if 0 1038 /* XXX is it good idea to wait TX finish? */ 1039 if (sc->sc_cr3 & CR3_TXE) { 1040 timo = 500; 1041 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1042 && --timo) 1043 delay(100); 1044 } 1045 #endif 1046 #ifdef DIAGNOSTIC 1047 if (!timo) 1048 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1049 reg); 1050 #endif 1051 } 1052 1053 void 1054 sacom_loadchannelregs(sc) 1055 struct sacom_softc *sc; 1056 { 1057 bus_space_tag_t iot = sc->sc_iot; 1058 bus_space_handle_t ioh = sc->sc_ioh; 1059 1060 /* XXXXX necessary? */ 1061 sacom_iflush(sc); 1062 1063 /* Need to stop engines first. */ 1064 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1065 1066 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1067 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1068 1069 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1070 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1071 } 1072 1073 int 1074 sacomhwiflow(tp, block) 1075 struct tty *tp; 1076 int block; 1077 { 1078 #if 0 1079 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1080 int s; 1081 1082 if (COM_ISALIVE(sc) == 0) 1083 return (0); 1084 1085 if (sc->sc_mcr_rts == 0) 1086 return (0); 1087 1088 s = splserial(); 1089 COM_LOCK(sc); 1090 1091 if (block) { 1092 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1093 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1094 sacom_hwiflow(sc); 1095 } 1096 } else { 1097 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1098 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1099 sacom_schedrx(sc); 1100 } 1101 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1102 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1103 sacom_hwiflow(sc); 1104 } 1105 } 1106 1107 COM_UNLOCK(sc); 1108 splx(s); 1109 #endif 1110 return (1); 1111 } 1112 1113 /* 1114 * (un)block input via hw flowcontrol 1115 */ 1116 void 1117 sacom_hwiflow(sc) 1118 struct sacom_softc *sc; 1119 { 1120 #if 0 1121 bus_space_tag_t iot = sc->sc_iot; 1122 bus_space_handle_t ioh = sc->sc_ioh; 1123 1124 /* XXX implement */ 1125 #endif 1126 } 1127 1128 1129 void 1130 sacomstart(tp) 1131 struct tty *tp; 1132 { 1133 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1134 bus_space_tag_t iot = sc->sc_iot; 1135 bus_space_handle_t ioh = sc->sc_ioh; 1136 int s; 1137 1138 if (COM_ISALIVE(sc) == 0) 1139 return; 1140 1141 s = spltty(); 1142 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1143 goto out; 1144 1145 if (tp->t_outq.c_cc <= tp->t_lowat) { 1146 if (ISSET(tp->t_state, TS_ASLEEP)) { 1147 CLR(tp->t_state, TS_ASLEEP); 1148 wakeup(&tp->t_outq); 1149 } 1150 selwakeup(&tp->t_wsel); 1151 if (tp->t_outq.c_cc == 0) 1152 goto out; 1153 } 1154 1155 /* Grab the first contiguous region of buffer space. */ 1156 { 1157 u_char *tba; 1158 int tbc; 1159 1160 tba = tp->t_outq.c_cf; 1161 tbc = ndqb(&tp->t_outq, 0); 1162 1163 (void)splserial(); 1164 COM_LOCK(sc); 1165 1166 sc->sc_tba = tba; 1167 sc->sc_tbc = tbc; 1168 } 1169 1170 SET(tp->t_state, TS_BUSY); 1171 sc->sc_tx_busy = 1; 1172 1173 /* Enable transmit completion interrupts if necessary. */ 1174 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1175 SET(sc->sc_cr3, CR3_TIE); 1176 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1177 } 1178 1179 /* Output the first chunk of the contiguous buffer. */ 1180 sacom_filltx(sc); 1181 1182 COM_UNLOCK(sc); 1183 out: 1184 splx(s); 1185 return; 1186 } 1187 1188 void 1189 sacom_filltx(sc) 1190 struct sacom_softc *sc; 1191 { 1192 bus_space_tag_t iot = sc->sc_iot; 1193 bus_space_handle_t ioh = sc->sc_ioh; 1194 int c, n; 1195 1196 n = 0; 1197 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1198 & SR1_TNF) { 1199 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1200 break; 1201 c = *(sc->sc_tba + n); 1202 c &= 0xff; 1203 bus_space_write_4(iot, ioh, SACOM_DR, c); 1204 n++; 1205 } 1206 sc->sc_tbc -= n; 1207 sc->sc_tba += n; 1208 } 1209 1210 /* 1211 * Stop output on a line. 1212 */ 1213 void 1214 sacomstop(tp, flag) 1215 struct tty *tp; 1216 int flag; 1217 { 1218 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1219 int s; 1220 1221 s = splserial(); 1222 COM_LOCK(sc); 1223 if (ISSET(tp->t_state, TS_BUSY)) { 1224 /* Stop transmitting at the next chunk. */ 1225 sc->sc_tbc = 0; 1226 sc->sc_heldtbc = 0; 1227 if (!ISSET(tp->t_state, TS_TTSTOP)) 1228 SET(tp->t_state, TS_FLUSH); 1229 } 1230 COM_UNLOCK(sc); 1231 splx(s); 1232 } 1233 1234 static inline void 1235 sacom_rxsoft(sc, tp) 1236 struct sacom_softc *sc; 1237 struct tty *tp; 1238 { 1239 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1240 u_char *get, *end; 1241 u_int cc, scc; 1242 u_char sr1; 1243 int code; 1244 int s; 1245 1246 end = sc->sc_ebuf; 1247 get = sc->sc_rbget; 1248 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1249 1250 while (cc) { 1251 code = get[0]; 1252 sr1 = get[1]; 1253 if (ISSET(sr1, SR1_FRE)) 1254 SET(code, TTY_FE); 1255 if (ISSET(sr1, SR1_PRE)) 1256 SET(code, TTY_PE); 1257 if ((*rint)(code, tp) == -1) { 1258 /* 1259 * The line discipline's buffer is out of space. 1260 */ 1261 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1262 /* 1263 * We're either not using flow control, or the 1264 * line discipline didn't tell us to block for 1265 * some reason. Either way, we have no way to 1266 * know when there's more space available, so 1267 * just drop the rest of the data. 1268 */ 1269 get += cc << 1; 1270 if (get >= end) 1271 get -= SACOM_RING_SIZE << 1; 1272 cc = 0; 1273 } else { 1274 /* 1275 * Don't schedule any more receive processing 1276 * until the line discipline tells us there's 1277 * space available (through comhwiflow()). 1278 * Leave the rest of the data in the input 1279 * buffer. 1280 */ 1281 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1282 } 1283 break; 1284 } 1285 get += 2; 1286 if (get >= end) 1287 get = sc->sc_rbuf; 1288 cc--; 1289 } 1290 1291 if (cc != scc) { 1292 sc->sc_rbget = get; 1293 s = splserial(); 1294 COM_LOCK(sc); 1295 1296 cc = sc->sc_rbavail += scc - cc; 1297 /* Buffers should be ok again, release possible block. */ 1298 if (cc >= 1) { 1299 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1300 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1301 SET(sc->sc_cr3, CR3_RIE); 1302 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1303 SACOM_CR3, sc->sc_cr3); 1304 } 1305 } 1306 COM_UNLOCK(sc); 1307 splx(s); 1308 } 1309 } 1310 1311 static inline void 1312 sacom_txsoft(sc, tp) 1313 struct sacom_softc *sc; 1314 struct tty *tp; 1315 { 1316 1317 CLR(tp->t_state, TS_BUSY); 1318 if (ISSET(tp->t_state, TS_FLUSH)) 1319 CLR(tp->t_state, TS_FLUSH); 1320 else 1321 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1322 (*tp->t_linesw->l_start)(tp); 1323 } 1324 1325 static inline void 1326 sacom_stsoft(sc, tp) 1327 struct sacom_softc *sc; 1328 struct tty *tp; 1329 { 1330 } 1331 1332 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1333 void 1334 sacomsoft(arg) 1335 void *arg; 1336 { 1337 struct sacom_softc *sc = arg; 1338 struct tty *tp; 1339 1340 if (COM_ISALIVE(sc) == 0) 1341 return; 1342 1343 { 1344 #else 1345 void 1346 sacomsoft() 1347 { 1348 struct sacom_softc *sc; 1349 struct tty *tp; 1350 int unit; 1351 1352 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1353 sc = device_lookup(&sacom_cd, unit); 1354 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1355 continue; 1356 1357 if (COM_ISALIVE(sc) == 0) 1358 continue; 1359 1360 tp = sc->sc_tty; 1361 if (tp == NULL) 1362 continue; 1363 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1364 continue; 1365 #endif 1366 tp = sc->sc_tty; 1367 1368 if (sc->sc_rx_ready) { 1369 sc->sc_rx_ready = 0; 1370 sacom_rxsoft(sc, tp); 1371 } 1372 1373 if (sc->sc_st_check) { 1374 sc->sc_st_check = 0; 1375 sacom_stsoft(sc, tp); 1376 } 1377 1378 if (sc->sc_tx_done) { 1379 sc->sc_tx_done = 0; 1380 sacom_txsoft(sc, tp); 1381 } 1382 } 1383 1384 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1385 #endif 1386 } 1387 1388 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1389 /* there has got to be a better way to do comsoft() */ 1390 }} 1391 #endif 1392 1393 int 1394 sacomintr(arg) 1395 void *arg; 1396 { 1397 struct sacom_softc *sc = arg; 1398 bus_space_tag_t iot = sc->sc_iot; 1399 bus_space_handle_t ioh = sc->sc_ioh; 1400 u_char *put, *end; 1401 u_int cc; 1402 u_int sr0, sr1; 1403 1404 if (COM_ISALIVE(sc) == 0) 1405 return (0); 1406 1407 COM_LOCK(sc); 1408 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1409 if (! sr0) { 1410 COM_UNLOCK(sc); 1411 return (0); 1412 } 1413 if (ISSET(sr0, SR0_EIF)) 1414 /* XXX silently discard error bits */ 1415 bus_space_read_4(iot, ioh, SACOM_DR); 1416 if (ISSET(sr0, SR0_RBB)) 1417 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1418 if (ISSET(sr0, SR0_REB)) { 1419 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1420 #if defined(DDB) || defined(KGDB) 1421 #ifndef DDB_BREAK_CHAR 1422 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1423 console_debugger(); 1424 } 1425 #endif 1426 #endif /* DDB || KGDB */ 1427 } 1428 1429 1430 end = sc->sc_ebuf; 1431 put = sc->sc_rbput; 1432 cc = sc->sc_rbavail; 1433 1434 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1435 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1436 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1437 while (cc > 0) { 1438 if (!ISSET(sr1, SR1_RNE)) { 1439 bus_space_write_4(iot, ioh, SACOM_SR0, 1440 SR0_RID); 1441 break; 1442 } 1443 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1444 put[1] = sr1; 1445 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1446 if (put[0] == DDB_BREAK_CHAR && 1447 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1448 console_debugger(); 1449 1450 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1451 continue; 1452 } 1453 #endif 1454 put += 2; 1455 if (put >= end) 1456 put = sc->sc_rbuf; 1457 cc--; 1458 1459 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1460 } 1461 1462 /* 1463 * Current string of incoming characters ended because 1464 * no more data was available or we ran out of space. 1465 * Schedule a receive event if any data was received. 1466 * If we're out of space, turn off receive interrupts. 1467 */ 1468 sc->sc_rbput = put; 1469 sc->sc_rbavail = cc; 1470 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1471 sc->sc_rx_ready = 1; 1472 1473 /* XXX do RX hardware flow control */ 1474 1475 /* 1476 * If we're out of space, disable receive interrupts 1477 * until the queue has drained a bit. 1478 */ 1479 if (!cc) { 1480 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1481 CLR(sc->sc_cr3, CR3_RIE); 1482 bus_space_write_4(iot, ioh, SACOM_CR3, 1483 sc->sc_cr3); 1484 } 1485 } else { 1486 #ifdef DIAGNOSTIC 1487 panic("sacomintr: we shouldn't reach here"); 1488 #endif 1489 CLR(sc->sc_cr3, CR3_RIE); 1490 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1491 } 1492 } 1493 1494 /* 1495 * Done handling any receive interrupts. See if data can be 1496 * transmitted as well. Schedule tx done event if no data left 1497 * and tty was marked busy. 1498 */ 1499 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1500 if (ISSET(sr0, SR0_TFS)) { 1501 /* 1502 * If we've delayed a parameter change, do it now, and restart 1503 * output. 1504 * XXX sacom_loadchanelregs() waits TX completion, 1505 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1506 */ 1507 if (sc->sc_heldchange) { 1508 sacom_loadchannelregs(sc); 1509 sc->sc_heldchange = 0; 1510 sc->sc_tbc = sc->sc_heldtbc; 1511 sc->sc_heldtbc = 0; 1512 } 1513 1514 /* Output the next chunk of the contiguous buffer, if any. */ 1515 if (sc->sc_tbc > 0) { 1516 sacom_filltx(sc); 1517 } else { 1518 /* Disable transmit completion interrupts if necessary. */ 1519 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1520 CLR(sc->sc_cr3, CR3_TIE); 1521 bus_space_write_4(iot, ioh, SACOM_CR3, 1522 sc->sc_cr3); 1523 } 1524 if (sc->sc_tx_busy) { 1525 sc->sc_tx_busy = 0; 1526 sc->sc_tx_done = 1; 1527 } 1528 } 1529 } 1530 COM_UNLOCK(sc); 1531 1532 /* Wake up the poller. */ 1533 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1534 softintr_schedule(sc->sc_si); 1535 #else 1536 setsoftserial(); 1537 #endif 1538 1539 #if NRND > 0 && defined(RND_COM) 1540 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1541 #endif 1542 return (1); 1543 } 1544 1545 static void 1546 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1547 1548 /* XXX this should be done at sc->enable function */ 1549 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1550 SAGPIO_PCR, 0xa0000); 1551 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1552 SAGPIO_PSR, 0x100); 1553 } 1554 1555 /* Initialization for serial console */ 1556 int 1557 sacominit(iot, iobase, baud, cflag, iohp) 1558 bus_space_tag_t iot; 1559 bus_addr_t iobase; 1560 int baud; 1561 tcflag_t cflag; 1562 bus_space_handle_t *iohp; 1563 { 1564 int brd, cr0; 1565 1566 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1567 printf("register map failed\n"); 1568 1569 /* wait for the Tx queue to drain and disable the UART */ 1570 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1571 ; 1572 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1573 1574 cr0 = cflag2cr0(cflag); 1575 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1576 1577 brd = SACOMSPEED(baud); 1578 sacomconsrate = baud; 1579 sacomconsaddr = iobase; 1580 sacomconscflag = cflag; 1581 /* XXX assumes little endian */ 1582 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1583 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1584 1585 /* enable the UART */ 1586 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1587 1588 return (0); 1589 } 1590 1591 void 1592 sacomcnprobe(cp) 1593 struct consdev *cp; 1594 { 1595 cp->cn_pri = CN_REMOTE; 1596 } 1597 1598 void 1599 sacomcninit(cp) 1600 struct consdev *cp; 1601 { 1602 if (cp == NULL) { 1603 /* XXX cp == NULL means that MMU is disabled. */ 1604 sacomconsioh = SACOM3_HW_BASE; 1605 sacomconstag = &sa11x0_bs_tag; 1606 cn_tab = &sacomcons; 1607 return; 1608 } 1609 1610 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1611 CONMODE, &sacomconsioh)) 1612 panic("can't init serial console @%x", CONADDR); 1613 cn_tab = &sacomcons; 1614 sacomconstag = &sa11x0_bs_tag; 1615 } 1616 1617 int 1618 sacomcngetc(dev) 1619 dev_t dev; 1620 { 1621 int c, s; 1622 1623 s = spltty(); /* XXX do we need this? */ 1624 1625 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1626 & SR1_RNE)) { 1627 #if defined(DDB) || defined(KGDB) 1628 #ifndef DDB_BREAK_CHAR 1629 u_int sr0; 1630 extern int db_active; 1631 1632 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1633 if (ISSET(sr0, SR0_RBB)) 1634 bus_space_write_4(sacomconstag, sacomconsioh, 1635 SACOM_SR0, SR0_RBB); 1636 if (ISSET(sr0, SR0_REB)) { 1637 bus_space_write_4(sacomconstag, sacomconsioh, 1638 SACOM_SR0, SR0_REB); 1639 if (db_active == 0) 1640 console_debugger(); 1641 } 1642 #endif 1643 #endif /* DDB || KGDB */ 1644 } 1645 1646 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1647 c &= 0xff; 1648 splx(s); 1649 1650 return (c); 1651 } 1652 1653 void 1654 sacomcnputc(dev, c) 1655 dev_t dev; 1656 int c; 1657 { 1658 int s; 1659 1660 s = spltty(); /* XXX do we need this? */ 1661 1662 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1663 & SR1_TNF)) 1664 ; 1665 1666 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1667 splx(s); 1668 } 1669 1670 void 1671 sacomcnpollc(dev, on) 1672 dev_t dev; 1673 int on; 1674 { 1675 1676 } 1677 1678 #ifdef DEBUG 1679 int 1680 sacomcncharpoll() 1681 { 1682 int c; 1683 1684 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1685 & SR1_RNE)) 1686 return -1; 1687 1688 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1689 c &= 0xff; 1690 1691 return (c); 1692 } 1693 1694 #endif 1695 1696 /* helper function to identify the com ports used by 1697 console or KGDB (and not yet autoconf attached) */ 1698 int 1699 sacom_is_console(iot, iobase, ioh) 1700 bus_space_tag_t iot; 1701 bus_addr_t iobase; 1702 bus_space_handle_t *ioh; 1703 { 1704 bus_space_handle_t help; 1705 1706 if (! sacomconsattached && 1707 iot == sacomconstag && iobase == sacomconsaddr) 1708 help = sacomconsioh; 1709 else 1710 return (0); 1711 1712 if (ioh) 1713 *ioh = help; 1714 return (1); 1715 } 1716
Indexes created Thu Oct 02 14:10:14 GMT 2025