sa11x0_com.c revision 1.26
1 /* $NetBSD: sa11x0_com.c,v 1.26 2006/02/20 16:50:36 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Charles M. Hannum. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. 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 1.26 2006/02/20 16:50:36 thorpej 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 device_is_active(&(sc)->sc_dev)) 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 /* XXX Do we need to disable interrupts here? */ 309 310 if (iot == sacomconstag && iobase == sacomconsaddr) { 311 sacomconsattached = 1; 312 sc->sc_speed = SACOMSPEED(sacomconsrate); 313 314 /* Make sure the console is always "hardwired". */ 315 delay(10000); /* wait for output to finish */ 316 SET(sc->sc_hwflags, COM_HW_CONSOLE); 317 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 318 } 319 320 tp = ttymalloc(); 321 tp->t_oproc = sacomstart; 322 tp->t_param = sacomparam; 323 tp->t_hwiflow = sacomhwiflow; 324 325 sc->sc_tty = tp; 326 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 327 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 328 sc->sc_rbavail = SACOM_RING_SIZE; 329 if (sc->sc_rbuf == NULL) { 330 printf("%s: unable to allocate ring buffer\n", 331 sc->sc_dev.dv_xname); 332 return; 333 } 334 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 335 sc->sc_tbc = 0; 336 337 tty_attach(tp); 338 339 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 340 int maj; 341 342 /* locate the major number */ 343 maj = cdevsw_lookup_major(&sacom_cdevsw); 344 345 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 346 347 delay(10000); /* XXX */ 348 printf("%s: console\n", sc->sc_dev.dv_xname); 349 delay(10000); /* XXX */ 350 } 351 352 353 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 354 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 355 #endif 356 357 #if NRND > 0 && defined(RND_COM) 358 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 359 RND_TYPE_TTY, 0); 360 #endif 361 362 /* if there are no enable/disable functions, assume the device 363 is always enabled */ 364 if (!sc->enable) 365 sc->enabled = 1; 366 367 sacom_config(sc); 368 369 SET(sc->sc_hwflags, COM_HW_DEV_OK); 370 } 371 372 /* This is necessary when dynamically changing SAIP configuration. */ 373 int 374 sacom_detach(self, flags) 375 struct device *self; 376 int flags; 377 { 378 struct sacom_softc *sc = (struct sacom_softc *)self; 379 int maj, mn; 380 381 /* locate the major number */ 382 maj = cdevsw_lookup_major(&sacom_cdevsw); 383 384 /* Nuke the vnodes for any open instances. */ 385 mn = self->dv_unit; 386 vdevgone(maj, mn, mn, VCHR); 387 388 mn |= COMDIALOUT_MASK; 389 vdevgone(maj, mn, mn, VCHR); 390 391 /* Free the receive buffer. */ 392 free(sc->sc_rbuf, M_DEVBUF); 393 394 /* Detach and free the tty. */ 395 tty_detach(sc->sc_tty); 396 ttyfree(sc->sc_tty); 397 398 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 399 /* Unhook the soft interrupt handler. */ 400 softintr_disestablish(sc->sc_si); 401 #endif 402 403 #if NRND > 0 && defined(RND_COM) 404 /* Unhook the entropy source. */ 405 rnd_detach_source(&sc->rnd_source); 406 #endif 407 408 return (0); 409 } 410 411 void 412 sacom_config(sc) 413 struct sacom_softc *sc; 414 { 415 bus_space_tag_t iot = sc->sc_iot; 416 bus_space_handle_t ioh = sc->sc_ioh; 417 418 /* Disable engine before configuring the device. */ 419 sc->sc_cr3 = 0; 420 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 421 422 #ifdef DDB 423 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 424 sacom_enable_debugport(sc); 425 #endif 426 } 427 428 #ifdef DDB 429 static void 430 sacom_enable_debugport(sc) 431 struct sacom_softc *sc; 432 { 433 bus_space_tag_t iot = sc->sc_iot; 434 bus_space_handle_t ioh = sc->sc_ioh; 435 int s; 436 437 s = splserial(); 438 COM_LOCK(sc); 439 sc->sc_cr3 = CR3_RXE | CR3_TXE; 440 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 441 COM_UNLOCK(sc); 442 splx(s); 443 } 444 #endif 445 446 int 447 sacom_activate(self, act) 448 struct device *self; 449 enum devact act; 450 { 451 struct sacom_softc *sc = (struct sacom_softc *)self; 452 int s, rv = 0; 453 454 s = splserial(); 455 COM_LOCK(sc); 456 switch (act) { 457 case DVACT_ACTIVATE: 458 rv = EOPNOTSUPP; 459 break; 460 461 case DVACT_DEACTIVATE: 462 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 463 rv = EBUSY; 464 break; 465 } 466 467 if (sc->disable != NULL && sc->enabled != 0) { 468 (*sc->disable)(sc); 469 sc->enabled = 0; 470 } 471 break; 472 } 473 474 COM_UNLOCK(sc); 475 splx(s); 476 return (rv); 477 } 478 479 void 480 sacom_shutdown(sc) 481 struct sacom_softc *sc; 482 { 483 struct tty *tp = sc->sc_tty; 484 int s; 485 486 s = splserial(); 487 COM_LOCK(sc); 488 489 /* Clear any break condition set with TIOCSBRK. */ 490 sacom_break(sc, 0); 491 492 /* 493 * Hang up if necessary. Wait a bit, so the other side has time to 494 * notice even if we immediately open the port again. 495 * Avoid tsleeping above splhigh(). 496 */ 497 if (ISSET(tp->t_cflag, HUPCL)) { 498 sacom_modem(sc, 0); 499 COM_UNLOCK(sc); 500 splx(s); 501 /* XXX tsleep will only timeout */ 502 (void) tsleep(sc, TTIPRI, ttclos, hz); 503 s = splserial(); 504 COM_LOCK(sc); 505 } 506 507 /* Turn off interrupts. */ 508 sc->sc_cr3 = 0; 509 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 510 511 if (sc->disable) { 512 #ifdef DIAGNOSTIC 513 if (!sc->enabled) 514 panic("sacom_shutdown: not enabled?"); 515 #endif 516 (*sc->disable)(sc); 517 sc->enabled = 0; 518 } 519 COM_UNLOCK(sc); 520 splx(s); 521 } 522 523 int 524 sacomopen(dev, flag, mode, l) 525 dev_t dev; 526 int flag, mode; 527 struct lwp *l; 528 { 529 struct sacom_softc *sc; 530 struct tty *tp; 531 int s, s2; 532 int error; 533 534 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 535 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 536 sc->sc_rbuf == NULL) 537 return (ENXIO); 538 539 if (!device_is_active(&sc->sc_dev)) 540 return (ENXIO); 541 542 tp = sc->sc_tty; 543 544 if (ISSET(tp->t_state, TS_ISOPEN) && 545 ISSET(tp->t_state, TS_XCLUDE) && 546 suser(l->l_proc->p_ucred, &l->l_proc->p_acflag) != 0) 547 return (EBUSY); 548 549 s = spltty(); 550 551 /* 552 * Do the following iff this is a first open. 553 */ 554 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 555 struct termios t; 556 557 tp->t_dev = dev; 558 559 s2 = splserial(); 560 COM_LOCK(sc); 561 562 if (sc->enable) { 563 if ((*sc->enable)(sc)) { 564 COM_UNLOCK(sc); 565 splx(s2); 566 splx(s); 567 printf("%s: device enable failed\n", 568 sc->sc_dev.dv_xname); 569 return (EIO); 570 } 571 sc->enabled = 1; 572 sacom_config(sc); 573 } 574 575 /* Turn on interrupts. */ 576 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 577 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 578 sc->sc_cr3); 579 580 581 COM_UNLOCK(sc); 582 splx(s2); 583 584 /* 585 * Initialize the termios status to the defaults. Add in the 586 * sticky bits from TIOCSFLAGS. 587 */ 588 t.c_ispeed = 0; 589 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 590 t.c_ospeed = sacomconsrate; 591 t.c_cflag = sacomconscflag; 592 } else { 593 t.c_ospeed = TTYDEF_SPEED; 594 t.c_cflag = TTYDEF_CFLAG; 595 } 596 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 597 SET(t.c_cflag, CLOCAL); 598 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 599 SET(t.c_cflag, CRTSCTS); 600 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 601 SET(t.c_cflag, MDMBUF); 602 /* Make sure sacomparam() will do something. */ 603 tp->t_ospeed = 0; 604 (void) sacomparam(tp, &t); 605 tp->t_iflag = TTYDEF_IFLAG; 606 tp->t_oflag = TTYDEF_OFLAG; 607 tp->t_lflag = TTYDEF_LFLAG; 608 ttychars(tp); 609 ttsetwater(tp); 610 611 s2 = splserial(); 612 COM_LOCK(sc); 613 614 /* 615 * Turn on DTR. We must always do this, even if carrier is not 616 * present, because otherwise we'd have to use TIOCSDTR 617 * immediately after setting CLOCAL, which applications do not 618 * expect. We always assert DTR while the device is open 619 * unless explicitly requested to deassert it. 620 */ 621 sacom_modem(sc, 1); 622 623 /* Clear the input ring, and unblock. */ 624 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 625 sc->sc_rbavail = SACOM_RING_SIZE; 626 sacom_iflush(sc); 627 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 628 sacom_hwiflow(sc); 629 630 #ifdef COM_DEBUG 631 if (sacom_debug) 632 comstatus(sc, "sacomopen "); 633 #endif 634 635 COM_UNLOCK(sc); 636 splx(s2); 637 } 638 639 splx(s); 640 641 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 642 if (error) 643 goto bad; 644 645 error = (*tp->t_linesw->l_open)(dev, tp); 646 if (error) 647 goto bad; 648 649 return (0); 650 651 bad: 652 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 653 /* 654 * We failed to open the device, and nobody else had it opened. 655 * Clean up the state as appropriate. 656 */ 657 sacom_shutdown(sc); 658 } 659 660 return (error); 661 } 662 663 int 664 sacomclose(dev, flag, mode, l) 665 dev_t dev; 666 int flag, mode; 667 struct lwp *l; 668 { 669 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 670 struct tty *tp = sc->sc_tty; 671 672 /* XXX This is for cons.c. */ 673 if (!ISSET(tp->t_state, TS_ISOPEN)) 674 return (0); 675 676 (*tp->t_linesw->l_close)(tp, flag); 677 ttyclose(tp); 678 679 if (COM_ISALIVE(sc) == 0) 680 return (0); 681 682 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 683 /* 684 * Although we got a last close, the device may still be in 685 * use; e.g. if this was the dialout node, and there are still 686 * processes waiting for carrier on the non-dialout node. 687 */ 688 sacom_shutdown(sc); 689 } 690 691 return (0); 692 } 693 694 int 695 sacomread(dev, uio, flag) 696 dev_t dev; 697 struct uio *uio; 698 int flag; 699 { 700 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 701 struct tty *tp = sc->sc_tty; 702 703 if (COM_ISALIVE(sc) == 0) 704 return (EIO); 705 706 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 707 } 708 709 int 710 sacomwrite(dev, uio, flag) 711 dev_t dev; 712 struct uio *uio; 713 int flag; 714 { 715 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 716 struct tty *tp = sc->sc_tty; 717 718 if (COM_ISALIVE(sc) == 0) 719 return (EIO); 720 721 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 722 } 723 724 int 725 sacompoll(dev, events, l) 726 dev_t dev; 727 int events; 728 struct lwp *l; 729 { 730 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 731 struct tty *tp = sc->sc_tty; 732 733 if (COM_ISALIVE(sc) == 0) 734 return (EIO); 735 736 return ((*tp->t_linesw->l_poll)(tp, events, l)); 737 } 738 739 struct tty * 740 sacomtty(dev) 741 dev_t dev; 742 { 743 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 744 struct tty *tp = sc->sc_tty; 745 746 return (tp); 747 } 748 749 int 750 sacomioctl(dev, cmd, data, flag, l) 751 dev_t dev; 752 u_long cmd; 753 caddr_t data; 754 int flag; 755 struct lwp *l; 756 { 757 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 758 struct tty *tp = sc->sc_tty; 759 int error; 760 int s; 761 762 if (COM_ISALIVE(sc) == 0) 763 return (EIO); 764 765 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 766 if (error != EPASSTHROUGH) 767 return (error); 768 769 error = ttioctl(tp, cmd, data, flag, l); 770 if (error != EPASSTHROUGH) 771 return (error); 772 773 error = 0; 774 775 s = splserial(); 776 COM_LOCK(sc); 777 778 switch (cmd) { 779 case TIOCSBRK: 780 sacom_break(sc, 1); 781 break; 782 783 case TIOCCBRK: 784 sacom_break(sc, 0); 785 break; 786 787 case TIOCSDTR: 788 sacom_modem(sc, 1); 789 break; 790 791 case TIOCCDTR: 792 sacom_modem(sc, 0); 793 break; 794 795 case TIOCGFLAGS: 796 *(int *)data = sc->sc_swflags; 797 break; 798 799 case TIOCSFLAGS: 800 error = suser(l->l_proc->p_ucred, &l->l_proc->p_acflag); 801 if (error) 802 break; 803 sc->sc_swflags = *(int *)data; 804 break; 805 806 case TIOCMSET: 807 case TIOCMBIS: 808 case TIOCMBIC: 809 tiocm_to_sacom(sc, cmd, *(int *)data); 810 break; 811 812 case TIOCMGET: 813 *(int *)data = sacom_to_tiocm(sc); 814 break; 815 816 default: 817 error = EPASSTHROUGH; 818 break; 819 } 820 821 COM_UNLOCK(sc); 822 splx(s); 823 824 #ifdef COM_DEBUG 825 if (sacom_debug) 826 comstatus(sc, "comioctl "); 827 #endif 828 829 return (error); 830 } 831 832 static inline void 833 sacom_schedrx(sc) 834 struct sacom_softc *sc; 835 { 836 837 sc->sc_rx_ready = 1; 838 839 /* Wake up the poller. */ 840 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 841 softintr_schedule(sc->sc_si); 842 #else 843 setsoftserial(); 844 #endif 845 } 846 847 void 848 sacom_break(sc, onoff) 849 struct sacom_softc *sc; 850 int onoff; 851 { 852 853 if (onoff) 854 SET(sc->sc_cr3, CR3_BRK); 855 else 856 CLR(sc->sc_cr3, CR3_BRK); 857 858 if (!sc->sc_heldchange) { 859 if (sc->sc_tx_busy) { 860 sc->sc_heldtbc = sc->sc_tbc; 861 sc->sc_tbc = 0; 862 sc->sc_heldchange = 1; 863 } else 864 sacom_loadchannelregs(sc); 865 } 866 } 867 868 void 869 sacom_modem(sc, onoff) 870 struct sacom_softc *sc; 871 int onoff; 872 { 873 if (!sc->sc_heldchange) { 874 if (sc->sc_tx_busy) { 875 sc->sc_heldtbc = sc->sc_tbc; 876 sc->sc_tbc = 0; 877 sc->sc_heldchange = 1; 878 } else 879 sacom_loadchannelregs(sc); 880 } 881 } 882 883 void 884 tiocm_to_sacom(sc, how, ttybits) 885 struct sacom_softc *sc; 886 u_long how; 887 int ttybits; 888 { 889 } 890 891 int 892 sacom_to_tiocm(sc) 893 struct sacom_softc *sc; 894 { 895 int ttybits = 0; 896 897 if (sc->sc_cr3 != 0) 898 SET(ttybits, TIOCM_LE); 899 900 return (ttybits); 901 } 902 903 static u_int 904 cflag2cr0(cflag) 905 tcflag_t cflag; 906 { 907 u_int cr0; 908 909 cr0 = (cflag & PARENB) ? CR0_PE : 0; 910 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 911 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 912 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 913 914 return (cr0); 915 } 916 917 int 918 sacomparam(tp, t) 919 struct tty *tp; 920 struct termios *t; 921 { 922 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 923 int ospeed = SACOMSPEED(t->c_ospeed); 924 u_int cr0; 925 int s; 926 927 if (COM_ISALIVE(sc) == 0) 928 return (EIO); 929 930 /* Check requested parameters. */ 931 if (ospeed < 0) 932 return (EINVAL); 933 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 934 return (EINVAL); 935 936 /* 937 * For the console, always force CLOCAL and !HUPCL, so that the port 938 * is always active. 939 */ 940 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 941 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 942 SET(t->c_cflag, CLOCAL); 943 CLR(t->c_cflag, HUPCL); 944 } 945 946 /* 947 * If there were no changes, don't do anything. This avoids dropping 948 * input and improves performance when all we did was frob things like 949 * VMIN and VTIME. 950 */ 951 if (tp->t_ospeed == t->c_ospeed && 952 tp->t_cflag == t->c_cflag) 953 return (0); 954 955 cr0 = cflag2cr0(t->c_cflag); 956 957 s = splserial(); 958 COM_LOCK(sc); 959 960 sc->sc_cr0 = cr0; 961 962 sc->sc_speed = ospeed; 963 964 /* And copy to tty. */ 965 tp->t_ispeed = 0; 966 tp->t_ospeed = t->c_ospeed; 967 tp->t_cflag = t->c_cflag; 968 969 if (!sc->sc_heldchange) { 970 if (sc->sc_tx_busy) { 971 sc->sc_heldtbc = sc->sc_tbc; 972 sc->sc_tbc = 0; 973 sc->sc_heldchange = 1; 974 } else 975 sacom_loadchannelregs(sc); 976 } 977 978 if (!ISSET(t->c_cflag, CHWFLOW)) { 979 /* Disable the high water mark. */ 980 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 981 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 982 sacom_schedrx(sc); 983 } 984 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 985 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 986 sacom_hwiflow(sc); 987 } 988 } 989 990 COM_UNLOCK(sc); 991 splx(s); 992 993 (void) (*tp->t_linesw->l_modem)(tp, 1); 994 995 #ifdef COM_DEBUG 996 if (sacom_debug) 997 comstatus(sc, "comparam "); 998 #endif 999 1000 return (0); 1001 } 1002 1003 void 1004 sacom_iflush(sc) 1005 struct sacom_softc *sc; 1006 { 1007 bus_space_tag_t iot = sc->sc_iot; 1008 bus_space_handle_t ioh = sc->sc_ioh; 1009 #ifdef DIAGNOSTIC 1010 int reg; 1011 #endif 1012 int timo; 1013 1014 #ifdef DIAGNOSTIC 1015 reg = 0xffff; 1016 #endif 1017 timo = 50; 1018 /* flush any pending I/O */ 1019 if (sc->sc_cr3 & CR3_RXE) { 1020 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1021 && --timo) 1022 #ifdef DIAGNOSTIC 1023 reg = 1024 #else 1025 (void) 1026 #endif 1027 bus_space_read_4(iot, ioh, SACOM_DR); 1028 } 1029 #if 0 1030 /* XXX is it good idea to wait TX finish? */ 1031 if (sc->sc_cr3 & CR3_TXE) { 1032 timo = 500; 1033 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1034 && --timo) 1035 delay(100); 1036 } 1037 #endif 1038 #ifdef DIAGNOSTIC 1039 if (!timo) 1040 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1041 reg); 1042 #endif 1043 } 1044 1045 void 1046 sacom_loadchannelregs(sc) 1047 struct sacom_softc *sc; 1048 { 1049 bus_space_tag_t iot = sc->sc_iot; 1050 bus_space_handle_t ioh = sc->sc_ioh; 1051 1052 /* XXXXX necessary? */ 1053 sacom_iflush(sc); 1054 1055 /* Need to stop engines first. */ 1056 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1057 1058 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1059 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1060 1061 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1062 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1063 } 1064 1065 int 1066 sacomhwiflow(tp, block) 1067 struct tty *tp; 1068 int block; 1069 { 1070 #if 0 1071 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1072 int s; 1073 1074 if (COM_ISALIVE(sc) == 0) 1075 return (0); 1076 1077 if (sc->sc_mcr_rts == 0) 1078 return (0); 1079 1080 s = splserial(); 1081 COM_LOCK(sc); 1082 1083 if (block) { 1084 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1085 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1086 sacom_hwiflow(sc); 1087 } 1088 } else { 1089 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1090 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1091 sacom_schedrx(sc); 1092 } 1093 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1094 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1095 sacom_hwiflow(sc); 1096 } 1097 } 1098 1099 COM_UNLOCK(sc); 1100 splx(s); 1101 #endif 1102 return (1); 1103 } 1104 1105 /* 1106 * (un)block input via hw flowcontrol 1107 */ 1108 void 1109 sacom_hwiflow(sc) 1110 struct sacom_softc *sc; 1111 { 1112 #if 0 1113 bus_space_tag_t iot = sc->sc_iot; 1114 bus_space_handle_t ioh = sc->sc_ioh; 1115 1116 /* XXX implement */ 1117 #endif 1118 } 1119 1120 1121 void 1122 sacomstart(tp) 1123 struct tty *tp; 1124 { 1125 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1126 bus_space_tag_t iot = sc->sc_iot; 1127 bus_space_handle_t ioh = sc->sc_ioh; 1128 int s; 1129 1130 if (COM_ISALIVE(sc) == 0) 1131 return; 1132 1133 s = spltty(); 1134 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1135 goto out; 1136 1137 if (tp->t_outq.c_cc <= tp->t_lowat) { 1138 if (ISSET(tp->t_state, TS_ASLEEP)) { 1139 CLR(tp->t_state, TS_ASLEEP); 1140 wakeup(&tp->t_outq); 1141 } 1142 selwakeup(&tp->t_wsel); 1143 if (tp->t_outq.c_cc == 0) 1144 goto out; 1145 } 1146 1147 /* Grab the first contiguous region of buffer space. */ 1148 { 1149 u_char *tba; 1150 int tbc; 1151 1152 tba = tp->t_outq.c_cf; 1153 tbc = ndqb(&tp->t_outq, 0); 1154 1155 (void)splserial(); 1156 COM_LOCK(sc); 1157 1158 sc->sc_tba = tba; 1159 sc->sc_tbc = tbc; 1160 } 1161 1162 SET(tp->t_state, TS_BUSY); 1163 sc->sc_tx_busy = 1; 1164 1165 /* Enable transmit completion interrupts if necessary. */ 1166 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1167 SET(sc->sc_cr3, CR3_TIE); 1168 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1169 } 1170 1171 /* Output the first chunk of the contiguous buffer. */ 1172 sacom_filltx(sc); 1173 1174 COM_UNLOCK(sc); 1175 out: 1176 splx(s); 1177 return; 1178 } 1179 1180 void 1181 sacom_filltx(sc) 1182 struct sacom_softc *sc; 1183 { 1184 bus_space_tag_t iot = sc->sc_iot; 1185 bus_space_handle_t ioh = sc->sc_ioh; 1186 int c, n; 1187 1188 n = 0; 1189 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1190 & SR1_TNF) { 1191 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1192 break; 1193 c = *(sc->sc_tba + n); 1194 c &= 0xff; 1195 bus_space_write_4(iot, ioh, SACOM_DR, c); 1196 n++; 1197 } 1198 sc->sc_tbc -= n; 1199 sc->sc_tba += n; 1200 } 1201 1202 /* 1203 * Stop output on a line. 1204 */ 1205 void 1206 sacomstop(tp, flag) 1207 struct tty *tp; 1208 int flag; 1209 { 1210 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1211 int s; 1212 1213 s = splserial(); 1214 COM_LOCK(sc); 1215 if (ISSET(tp->t_state, TS_BUSY)) { 1216 /* Stop transmitting at the next chunk. */ 1217 sc->sc_tbc = 0; 1218 sc->sc_heldtbc = 0; 1219 if (!ISSET(tp->t_state, TS_TTSTOP)) 1220 SET(tp->t_state, TS_FLUSH); 1221 } 1222 COM_UNLOCK(sc); 1223 splx(s); 1224 } 1225 1226 static inline void 1227 sacom_rxsoft(sc, tp) 1228 struct sacom_softc *sc; 1229 struct tty *tp; 1230 { 1231 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1232 u_char *get, *end; 1233 u_int cc, scc; 1234 u_char sr1; 1235 int code; 1236 int s; 1237 1238 end = sc->sc_ebuf; 1239 get = sc->sc_rbget; 1240 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1241 1242 while (cc) { 1243 code = get[0]; 1244 sr1 = get[1]; 1245 if (ISSET(sr1, SR1_FRE)) 1246 SET(code, TTY_FE); 1247 if (ISSET(sr1, SR1_PRE)) 1248 SET(code, TTY_PE); 1249 if ((*rint)(code, tp) == -1) { 1250 /* 1251 * The line discipline's buffer is out of space. 1252 */ 1253 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1254 /* 1255 * We're either not using flow control, or the 1256 * line discipline didn't tell us to block for 1257 * some reason. Either way, we have no way to 1258 * know when there's more space available, so 1259 * just drop the rest of the data. 1260 */ 1261 get += cc << 1; 1262 if (get >= end) 1263 get -= SACOM_RING_SIZE << 1; 1264 cc = 0; 1265 } else { 1266 /* 1267 * Don't schedule any more receive processing 1268 * until the line discipline tells us there's 1269 * space available (through comhwiflow()). 1270 * Leave the rest of the data in the input 1271 * buffer. 1272 */ 1273 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1274 } 1275 break; 1276 } 1277 get += 2; 1278 if (get >= end) 1279 get = sc->sc_rbuf; 1280 cc--; 1281 } 1282 1283 if (cc != scc) { 1284 sc->sc_rbget = get; 1285 s = splserial(); 1286 COM_LOCK(sc); 1287 1288 cc = sc->sc_rbavail += scc - cc; 1289 /* Buffers should be ok again, release possible block. */ 1290 if (cc >= 1) { 1291 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1292 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1293 SET(sc->sc_cr3, CR3_RIE); 1294 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1295 SACOM_CR3, sc->sc_cr3); 1296 } 1297 } 1298 COM_UNLOCK(sc); 1299 splx(s); 1300 } 1301 } 1302 1303 static inline void 1304 sacom_txsoft(sc, tp) 1305 struct sacom_softc *sc; 1306 struct tty *tp; 1307 { 1308 1309 CLR(tp->t_state, TS_BUSY); 1310 if (ISSET(tp->t_state, TS_FLUSH)) 1311 CLR(tp->t_state, TS_FLUSH); 1312 else 1313 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1314 (*tp->t_linesw->l_start)(tp); 1315 } 1316 1317 static inline void 1318 sacom_stsoft(sc, tp) 1319 struct sacom_softc *sc; 1320 struct tty *tp; 1321 { 1322 } 1323 1324 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1325 void 1326 sacomsoft(arg) 1327 void *arg; 1328 { 1329 struct sacom_softc *sc = arg; 1330 struct tty *tp; 1331 1332 if (COM_ISALIVE(sc) == 0) 1333 return; 1334 1335 { 1336 #else 1337 void 1338 sacomsoft() 1339 { 1340 struct sacom_softc *sc; 1341 struct tty *tp; 1342 int unit; 1343 1344 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1345 sc = device_lookup(&sacom_cd, unit); 1346 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1347 continue; 1348 1349 if (COM_ISALIVE(sc) == 0) 1350 continue; 1351 1352 tp = sc->sc_tty; 1353 if (tp == NULL) 1354 continue; 1355 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1356 continue; 1357 #endif 1358 tp = sc->sc_tty; 1359 1360 if (sc->sc_rx_ready) { 1361 sc->sc_rx_ready = 0; 1362 sacom_rxsoft(sc, tp); 1363 } 1364 1365 if (sc->sc_st_check) { 1366 sc->sc_st_check = 0; 1367 sacom_stsoft(sc, tp); 1368 } 1369 1370 if (sc->sc_tx_done) { 1371 sc->sc_tx_done = 0; 1372 sacom_txsoft(sc, tp); 1373 } 1374 } 1375 1376 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1377 #endif 1378 } 1379 1380 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1381 /* there has got to be a better way to do comsoft() */ 1382 }} 1383 #endif 1384 1385 int 1386 sacomintr(arg) 1387 void *arg; 1388 { 1389 struct sacom_softc *sc = arg; 1390 bus_space_tag_t iot = sc->sc_iot; 1391 bus_space_handle_t ioh = sc->sc_ioh; 1392 u_char *put, *end; 1393 u_int cc; 1394 u_int sr0, sr1; 1395 1396 if (COM_ISALIVE(sc) == 0) 1397 return (0); 1398 1399 COM_LOCK(sc); 1400 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1401 if (! sr0) { 1402 COM_UNLOCK(sc); 1403 return (0); 1404 } 1405 if (ISSET(sr0, SR0_EIF)) 1406 /* XXX silently discard error bits */ 1407 bus_space_read_4(iot, ioh, SACOM_DR); 1408 if (ISSET(sr0, SR0_RBB)) 1409 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1410 if (ISSET(sr0, SR0_REB)) { 1411 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1412 #if defined(DDB) || defined(KGDB) 1413 #ifndef DDB_BREAK_CHAR 1414 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1415 console_debugger(); 1416 } 1417 #endif 1418 #endif /* DDB || KGDB */ 1419 } 1420 1421 1422 end = sc->sc_ebuf; 1423 put = sc->sc_rbput; 1424 cc = sc->sc_rbavail; 1425 1426 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1427 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1428 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1429 while (cc > 0) { 1430 if (!ISSET(sr1, SR1_RNE)) { 1431 bus_space_write_4(iot, ioh, SACOM_SR0, 1432 SR0_RID); 1433 break; 1434 } 1435 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1436 put[1] = sr1; 1437 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1438 if (put[0] == DDB_BREAK_CHAR && 1439 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1440 console_debugger(); 1441 1442 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1443 continue; 1444 } 1445 #endif 1446 put += 2; 1447 if (put >= end) 1448 put = sc->sc_rbuf; 1449 cc--; 1450 1451 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1452 } 1453 1454 /* 1455 * Current string of incoming characters ended because 1456 * no more data was available or we ran out of space. 1457 * Schedule a receive event if any data was received. 1458 * If we're out of space, turn off receive interrupts. 1459 */ 1460 sc->sc_rbput = put; 1461 sc->sc_rbavail = cc; 1462 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1463 sc->sc_rx_ready = 1; 1464 1465 /* XXX do RX hardware flow control */ 1466 1467 /* 1468 * If we're out of space, disable receive interrupts 1469 * until the queue has drained a bit. 1470 */ 1471 if (!cc) { 1472 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1473 CLR(sc->sc_cr3, CR3_RIE); 1474 bus_space_write_4(iot, ioh, SACOM_CR3, 1475 sc->sc_cr3); 1476 } 1477 } else { 1478 #ifdef DIAGNOSTIC 1479 panic("sacomintr: we shouldn't reach here"); 1480 #endif 1481 CLR(sc->sc_cr3, CR3_RIE); 1482 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1483 } 1484 } 1485 1486 /* 1487 * Done handling any receive interrupts. See if data can be 1488 * transmitted as well. Schedule tx done event if no data left 1489 * and tty was marked busy. 1490 */ 1491 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1492 if (ISSET(sr0, SR0_TFS)) { 1493 /* 1494 * If we've delayed a parameter change, do it now, and restart 1495 * output. 1496 * XXX sacom_loadchanelregs() waits TX completion, 1497 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1498 */ 1499 if (sc->sc_heldchange) { 1500 sacom_loadchannelregs(sc); 1501 sc->sc_heldchange = 0; 1502 sc->sc_tbc = sc->sc_heldtbc; 1503 sc->sc_heldtbc = 0; 1504 } 1505 1506 /* Output the next chunk of the contiguous buffer, if any. */ 1507 if (sc->sc_tbc > 0) { 1508 sacom_filltx(sc); 1509 } else { 1510 /* Disable transmit completion interrupts if necessary. */ 1511 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1512 CLR(sc->sc_cr3, CR3_TIE); 1513 bus_space_write_4(iot, ioh, SACOM_CR3, 1514 sc->sc_cr3); 1515 } 1516 if (sc->sc_tx_busy) { 1517 sc->sc_tx_busy = 0; 1518 sc->sc_tx_done = 1; 1519 } 1520 } 1521 } 1522 COM_UNLOCK(sc); 1523 1524 /* Wake up the poller. */ 1525 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1526 softintr_schedule(sc->sc_si); 1527 #else 1528 setsoftserial(); 1529 #endif 1530 1531 #if NRND > 0 && defined(RND_COM) 1532 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1533 #endif 1534 return (1); 1535 } 1536 1537 static void 1538 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1539 1540 /* XXX this should be done at sc->enable function */ 1541 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1542 SAGPIO_PCR, 0xa0000); 1543 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1544 SAGPIO_PSR, 0x100); 1545 } 1546 1547 /* Initialization for serial console */ 1548 int 1549 sacominit(iot, iobase, baud, cflag, iohp) 1550 bus_space_tag_t iot; 1551 bus_addr_t iobase; 1552 int baud; 1553 tcflag_t cflag; 1554 bus_space_handle_t *iohp; 1555 { 1556 int brd, cr0; 1557 1558 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1559 printf("register map failed\n"); 1560 1561 /* wait for the Tx queue to drain and disable the UART */ 1562 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1563 ; 1564 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1565 1566 cr0 = cflag2cr0(cflag); 1567 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1568 1569 brd = SACOMSPEED(baud); 1570 sacomconsrate = baud; 1571 sacomconsaddr = iobase; 1572 sacomconscflag = cflag; 1573 /* XXX assumes little endian */ 1574 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1575 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1576 1577 /* enable the UART */ 1578 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1579 1580 return (0); 1581 } 1582 1583 void 1584 sacomcnprobe(cp) 1585 struct consdev *cp; 1586 { 1587 cp->cn_pri = CN_REMOTE; 1588 } 1589 1590 void 1591 sacomcninit(cp) 1592 struct consdev *cp; 1593 { 1594 if (cp == NULL) { 1595 /* XXX cp == NULL means that MMU is disabled. */ 1596 sacomconsioh = SACOM3_HW_BASE; 1597 sacomconstag = &sa11x0_bs_tag; 1598 cn_tab = &sacomcons; 1599 return; 1600 } 1601 1602 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1603 CONMODE, &sacomconsioh)) 1604 panic("can't init serial console @%x", CONADDR); 1605 cn_tab = &sacomcons; 1606 sacomconstag = &sa11x0_bs_tag; 1607 } 1608 1609 int 1610 sacomcngetc(dev) 1611 dev_t dev; 1612 { 1613 int c, s; 1614 1615 s = spltty(); /* XXX do we need this? */ 1616 1617 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1618 & SR1_RNE)) { 1619 #if defined(DDB) || defined(KGDB) 1620 #ifndef DDB_BREAK_CHAR 1621 u_int sr0; 1622 extern int db_active; 1623 1624 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1625 if (ISSET(sr0, SR0_RBB)) 1626 bus_space_write_4(sacomconstag, sacomconsioh, 1627 SACOM_SR0, SR0_RBB); 1628 if (ISSET(sr0, SR0_REB)) { 1629 bus_space_write_4(sacomconstag, sacomconsioh, 1630 SACOM_SR0, SR0_REB); 1631 if (db_active == 0) 1632 console_debugger(); 1633 } 1634 #endif 1635 #endif /* DDB || KGDB */ 1636 } 1637 1638 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1639 c &= 0xff; 1640 splx(s); 1641 1642 return (c); 1643 } 1644 1645 void 1646 sacomcnputc(dev, c) 1647 dev_t dev; 1648 int c; 1649 { 1650 int s; 1651 1652 s = spltty(); /* XXX do we need this? */ 1653 1654 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1655 & SR1_TNF)) 1656 ; 1657 1658 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1659 splx(s); 1660 } 1661 1662 void 1663 sacomcnpollc(dev, on) 1664 dev_t dev; 1665 int on; 1666 { 1667 1668 } 1669 1670 #if 0 1671 #ifdef DEBUG 1672 int 1673 sacomcncharpoll() 1674 { 1675 int c; 1676 1677 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1678 & SR1_RNE)) 1679 return -1; 1680 1681 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1682 c &= 0xff; 1683 1684 return (c); 1685 } 1686 #endif 1687 #endif 1688 1689 /* helper function to identify the com ports used by 1690 console or KGDB (and not yet autoconf attached) */ 1691 int 1692 sacom_is_console(iot, iobase, ioh) 1693 bus_space_tag_t iot; 1694 bus_addr_t iobase; 1695 bus_space_handle_t *ioh; 1696 { 1697 bus_space_handle_t help; 1698 1699 if (! sacomconsattached && 1700 iot == sacomconstag && iobase == sacomconsaddr) 1701 help = sacomconsioh; 1702 else 1703 return (0); 1704 1705 if (ioh) 1706 *ioh = help; 1707 return (1); 1708 } 1709
Indexes created Fri Oct 03 02:09:57 GMT 2025