sa11x0_com.c revision 1.28
1 /* $NetBSD: sa11x0_com.c,v 1.28 2006/03/04 17:22:06 peter Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Charles M. Hannum. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)com.c 7.5 (Berkeley) 5/16/91 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.28 2006/03/04 17:22:06 peter Exp $"); 75 76 #include "opt_com.h" 77 #include "opt_ddb.h" 78 #include "opt_ddbparam.h" 79 #include "opt_kgdb.h" 80 #include "opt_multiprocessor.h" 81 #include "opt_lockdebug.h" 82 83 #include "rnd.h" 84 #if NRND > 0 && defined(RND_COM) 85 #include <sys/rnd.h> 86 #endif 87 88 #include <sys/param.h> 89 #include <sys/systm.h> 90 #include <sys/types.h> 91 #include <sys/conf.h> 92 #include <sys/file.h> 93 #include <sys/device.h> 94 #include <sys/kernel.h> 95 #include <sys/malloc.h> 96 #include <sys/tty.h> 97 #include <sys/uio.h> 98 #include <sys/vnode.h> 99 100 #include <dev/cons.h> 101 102 #include <machine/bus.h> 103 #include <arm/sa11x0/sa11x0_reg.h> 104 #include <arm/sa11x0/sa11x0_var.h> 105 #include <arm/sa11x0/sa11x0_comreg.h> 106 #include <arm/sa11x0/sa11x0_comvar.h> 107 #include <arm/sa11x0/sa11x0_gpioreg.h> 108 109 #ifdef hpcarm 110 #include <hpc/include/platid.h> 111 #include <hpc/include/platid_mask.h> 112 #endif 113 114 #include "sacom.h" 115 116 dev_type_open(sacomopen); 117 dev_type_close(sacomclose); 118 dev_type_read(sacomread); 119 dev_type_write(sacomwrite); 120 dev_type_ioctl(sacomioctl); 121 dev_type_stop(sacomstop); 122 dev_type_tty(sacomtty); 123 dev_type_poll(sacompoll); 124 125 const struct cdevsw sacom_cdevsw = { 126 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 127 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 128 }; 129 130 static int sacom_match(struct device *, struct cfdata *, void *); 131 static void sacom_attach(struct device *, struct device *, void *); 132 static void sacom_filltx(struct sacom_softc *); 133 static void sacom_attach_subr(struct sacom_softc *); 134 #if defined(DDB) || defined(KGDB) 135 static void sacom_enable_debugport(struct sacom_softc *); 136 #endif 137 int sacom_detach(struct device *, int); 138 void sacom_config(struct sacom_softc *); 139 int sacom_activate(struct device *, enum devact); 140 void sacom_shutdown(struct sacom_softc *); 141 static u_int cflag2cr0(tcflag_t); 142 int sacomparam(struct tty *, struct termios *); 143 void sacomstart(struct tty *); 144 int sacomhwiflow(struct tty *, int); 145 146 void sacom_loadchannelregs(struct sacom_softc *); 147 void sacom_hwiflow(struct sacom_softc *); 148 void sacom_break(struct sacom_softc *, int); 149 void sacom_modem(struct sacom_softc *, int); 150 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 151 int sacom_to_tiocm(struct sacom_softc *); 152 void sacom_iflush(struct sacom_softc *); 153 154 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 155 bus_space_handle_t *); 156 int sacom_is_console(bus_space_tag_t, bus_addr_t, 157 bus_space_handle_t *); 158 159 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 160 void sacomsoft(void *); 161 #else 162 void sacomsoft(void); 163 #endif 164 165 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 166 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 167 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 168 static inline void sacom_schedrx(struct sacom_softc *); 169 170 #ifdef hpcarm 171 /* HPCARM specific functions */ 172 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 173 #endif 174 175 #define COMUNIT_MASK 0x7ffff 176 #define COMDIALOUT_MASK 0x80000 177 178 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 179 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 180 181 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 182 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_7XX, sacom_j720_init }, 217 { NULL, NULL } 218 }; 219 #endif 220 221 struct consdev sacomcons = { 222 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 223 NULL, NULL, NODEV, CN_NORMAL 224 }; 225 226 #ifndef CONMODE 227 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 228 #endif 229 #ifndef CONSPEED 230 #define CONSPEED 9600 231 #endif 232 #ifndef CONADDR 233 #define CONADDR SACOM3_BASE 234 #endif 235 236 static int 237 sacom_match(struct device *parent, struct cfdata *match, void *aux) 238 { 239 return (1); 240 } 241 242 void 243 sacom_attach(struct device *parent, struct device *self, void *aux) 244 { 245 struct sacom_softc *sc = (struct sacom_softc*)self; 246 struct sa11x0_attach_args *sa = aux; 247 248 #ifdef hpcarm 249 struct platid_data *p; 250 void (*mdinit)(struct device *, struct sacom_softc *); 251 #endif 252 253 printf("\n"); 254 255 sc->sc_iot = sa->sa_iot; 256 sc->sc_baseaddr = sa->sa_addr; 257 258 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 259 &sc->sc_ioh)) { 260 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 261 return; 262 } 263 264 printf("%s: ", sc->sc_dev.dv_xname); 265 switch(sc->sc_baseaddr) { 266 case 0x80050000: 267 printf("SA11x0 UART3\n"); 268 break; 269 case 0x80010000: 270 printf("SA11x0 UART1\n"); 271 break; 272 case 0x80030000: 273 printf("SA11x0 UART2 (IRDA)\n"); 274 break; 275 default: 276 printf("unknown SA11x0 UART\n"); 277 break; 278 } 279 280 sacom_attach_subr(sc); 281 282 #ifdef hpcarm 283 /* Do hpcarm specific initialization, if any */ 284 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 285 mdinit = p->data; 286 (mdinit)(parent, sc); 287 } 288 #endif 289 290 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 291 } 292 293 void 294 sacom_attach_subr(struct sacom_softc *sc) 295 { 296 bus_addr_t iobase = sc->sc_baseaddr; 297 bus_space_tag_t iot = sc->sc_iot; 298 struct tty *tp; 299 300 /* XXX Do we need to disable interrupts here? */ 301 302 if (iot == sacomconstag && iobase == sacomconsaddr) { 303 sacomconsattached = 1; 304 sc->sc_speed = SACOMSPEED(sacomconsrate); 305 306 /* Make sure the console is always "hardwired". */ 307 delay(10000); /* wait for output to finish */ 308 SET(sc->sc_hwflags, COM_HW_CONSOLE); 309 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 310 } 311 312 tp = ttymalloc(); 313 tp->t_oproc = sacomstart; 314 tp->t_param = sacomparam; 315 tp->t_hwiflow = sacomhwiflow; 316 317 sc->sc_tty = tp; 318 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 319 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 320 sc->sc_rbavail = SACOM_RING_SIZE; 321 if (sc->sc_rbuf == NULL) { 322 printf("%s: unable to allocate ring buffer\n", 323 sc->sc_dev.dv_xname); 324 return; 325 } 326 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 327 sc->sc_tbc = 0; 328 329 tty_attach(tp); 330 331 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 332 int maj; 333 334 /* locate the major number */ 335 maj = cdevsw_lookup_major(&sacom_cdevsw); 336 337 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 338 339 delay(10000); /* XXX */ 340 printf("%s: console\n", sc->sc_dev.dv_xname); 341 delay(10000); /* XXX */ 342 } 343 344 345 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 346 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 347 #endif 348 349 #if NRND > 0 && defined(RND_COM) 350 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 351 RND_TYPE_TTY, 0); 352 #endif 353 354 /* if there are no enable/disable functions, assume the device 355 is always enabled */ 356 if (!sc->enable) 357 sc->enabled = 1; 358 359 sacom_config(sc); 360 361 SET(sc->sc_hwflags, COM_HW_DEV_OK); 362 } 363 364 /* This is necessary when dynamically changing SAIP configuration. */ 365 int 366 sacom_detach(struct device *self, int flags) 367 { 368 struct sacom_softc *sc = (struct sacom_softc *)self; 369 int maj, mn; 370 371 /* locate the major number */ 372 maj = cdevsw_lookup_major(&sacom_cdevsw); 373 374 /* Nuke the vnodes for any open instances. */ 375 mn = self->dv_unit; 376 vdevgone(maj, mn, mn, VCHR); 377 378 mn |= COMDIALOUT_MASK; 379 vdevgone(maj, mn, mn, VCHR); 380 381 /* Free the receive buffer. */ 382 free(sc->sc_rbuf, M_DEVBUF); 383 384 /* Detach and free the tty. */ 385 tty_detach(sc->sc_tty); 386 ttyfree(sc->sc_tty); 387 388 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 389 /* Unhook the soft interrupt handler. */ 390 softintr_disestablish(sc->sc_si); 391 #endif 392 393 #if NRND > 0 && defined(RND_COM) 394 /* Unhook the entropy source. */ 395 rnd_detach_source(&sc->rnd_source); 396 #endif 397 398 return (0); 399 } 400 401 void 402 sacom_config(struct sacom_softc *sc) 403 { 404 bus_space_tag_t iot = sc->sc_iot; 405 bus_space_handle_t ioh = sc->sc_ioh; 406 407 /* Disable engine before configuring the device. */ 408 sc->sc_cr3 = 0; 409 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 410 411 #ifdef DDB 412 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 413 sacom_enable_debugport(sc); 414 #endif 415 } 416 417 #ifdef DDB 418 static void 419 sacom_enable_debugport(struct sacom_softc *sc) 420 { 421 bus_space_tag_t iot = sc->sc_iot; 422 bus_space_handle_t ioh = sc->sc_ioh; 423 int s; 424 425 s = splserial(); 426 COM_LOCK(sc); 427 sc->sc_cr3 = CR3_RXE | CR3_TXE; 428 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 429 COM_UNLOCK(sc); 430 splx(s); 431 } 432 #endif 433 434 int 435 sacom_activate(struct device *self, enum devact act) 436 { 437 struct sacom_softc *sc = (struct sacom_softc *)self; 438 int s, rv = 0; 439 440 s = splserial(); 441 COM_LOCK(sc); 442 switch (act) { 443 case DVACT_ACTIVATE: 444 rv = EOPNOTSUPP; 445 break; 446 447 case DVACT_DEACTIVATE: 448 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 449 rv = EBUSY; 450 break; 451 } 452 453 if (sc->disable != NULL && sc->enabled != 0) { 454 (*sc->disable)(sc); 455 sc->enabled = 0; 456 } 457 break; 458 } 459 460 COM_UNLOCK(sc); 461 splx(s); 462 return (rv); 463 } 464 465 void 466 sacom_shutdown(struct sacom_softc *sc) 467 { 468 struct tty *tp = sc->sc_tty; 469 int s; 470 471 s = splserial(); 472 COM_LOCK(sc); 473 474 /* Clear any break condition set with TIOCSBRK. */ 475 sacom_break(sc, 0); 476 477 /* 478 * Hang up if necessary. Wait a bit, so the other side has time to 479 * notice even if we immediately open the port again. 480 * Avoid tsleeping above splhigh(). 481 */ 482 if (ISSET(tp->t_cflag, HUPCL)) { 483 sacom_modem(sc, 0); 484 COM_UNLOCK(sc); 485 splx(s); 486 /* XXX tsleep will only timeout */ 487 (void) tsleep(sc, TTIPRI, ttclos, hz); 488 s = splserial(); 489 COM_LOCK(sc); 490 } 491 492 /* Turn off interrupts. */ 493 sc->sc_cr3 = 0; 494 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 495 496 if (sc->disable) { 497 #ifdef DIAGNOSTIC 498 if (!sc->enabled) 499 panic("sacom_shutdown: not enabled?"); 500 #endif 501 (*sc->disable)(sc); 502 sc->enabled = 0; 503 } 504 COM_UNLOCK(sc); 505 splx(s); 506 } 507 508 int 509 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 510 { 511 struct sacom_softc *sc; 512 struct tty *tp; 513 int s, s2; 514 int error; 515 516 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 517 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 518 sc->sc_rbuf == NULL) 519 return (ENXIO); 520 521 if (!device_is_active(&sc->sc_dev)) 522 return (ENXIO); 523 524 tp = sc->sc_tty; 525 526 if (ISSET(tp->t_state, TS_ISOPEN) && 527 ISSET(tp->t_state, TS_XCLUDE) && 528 suser(l->l_proc->p_ucred, &l->l_proc->p_acflag) != 0) 529 return (EBUSY); 530 531 s = spltty(); 532 533 /* 534 * Do the following iff this is a first open. 535 */ 536 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 537 struct termios t; 538 539 tp->t_dev = dev; 540 541 s2 = splserial(); 542 COM_LOCK(sc); 543 544 if (sc->enable) { 545 if ((*sc->enable)(sc)) { 546 COM_UNLOCK(sc); 547 splx(s2); 548 splx(s); 549 printf("%s: device enable failed\n", 550 sc->sc_dev.dv_xname); 551 return (EIO); 552 } 553 sc->enabled = 1; 554 sacom_config(sc); 555 } 556 557 /* Turn on interrupts. */ 558 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 559 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 560 sc->sc_cr3); 561 562 563 COM_UNLOCK(sc); 564 splx(s2); 565 566 /* 567 * Initialize the termios status to the defaults. Add in the 568 * sticky bits from TIOCSFLAGS. 569 */ 570 t.c_ispeed = 0; 571 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 572 t.c_ospeed = sacomconsrate; 573 t.c_cflag = sacomconscflag; 574 } else { 575 t.c_ospeed = TTYDEF_SPEED; 576 t.c_cflag = TTYDEF_CFLAG; 577 } 578 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 579 SET(t.c_cflag, CLOCAL); 580 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 581 SET(t.c_cflag, CRTSCTS); 582 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 583 SET(t.c_cflag, MDMBUF); 584 /* Make sure sacomparam() will do something. */ 585 tp->t_ospeed = 0; 586 (void) sacomparam(tp, &t); 587 tp->t_iflag = TTYDEF_IFLAG; 588 tp->t_oflag = TTYDEF_OFLAG; 589 tp->t_lflag = TTYDEF_LFLAG; 590 ttychars(tp); 591 ttsetwater(tp); 592 593 s2 = splserial(); 594 COM_LOCK(sc); 595 596 /* 597 * Turn on DTR. We must always do this, even if carrier is not 598 * present, because otherwise we'd have to use TIOCSDTR 599 * immediately after setting CLOCAL, which applications do not 600 * expect. We always assert DTR while the device is open 601 * unless explicitly requested to deassert it. 602 */ 603 sacom_modem(sc, 1); 604 605 /* Clear the input ring, and unblock. */ 606 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 607 sc->sc_rbavail = SACOM_RING_SIZE; 608 sacom_iflush(sc); 609 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 610 sacom_hwiflow(sc); 611 612 #ifdef COM_DEBUG 613 if (sacom_debug) 614 comstatus(sc, "sacomopen "); 615 #endif 616 617 COM_UNLOCK(sc); 618 splx(s2); 619 } 620 621 splx(s); 622 623 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 624 if (error) 625 goto bad; 626 627 error = (*tp->t_linesw->l_open)(dev, tp); 628 if (error) 629 goto bad; 630 631 return (0); 632 633 bad: 634 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 635 /* 636 * We failed to open the device, and nobody else had it opened. 637 * Clean up the state as appropriate. 638 */ 639 sacom_shutdown(sc); 640 } 641 642 return (error); 643 } 644 645 int 646 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 647 { 648 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 649 struct tty *tp = sc->sc_tty; 650 651 /* XXX This is for cons.c. */ 652 if (!ISSET(tp->t_state, TS_ISOPEN)) 653 return (0); 654 655 (*tp->t_linesw->l_close)(tp, flag); 656 ttyclose(tp); 657 658 if (COM_ISALIVE(sc) == 0) 659 return (0); 660 661 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 662 /* 663 * Although we got a last close, the device may still be in 664 * use; e.g. if this was the dialout node, and there are still 665 * processes waiting for carrier on the non-dialout node. 666 */ 667 sacom_shutdown(sc); 668 } 669 670 return (0); 671 } 672 673 int 674 sacomread(dev_t dev, struct uio *uio, int flag) 675 { 676 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 677 struct tty *tp = sc->sc_tty; 678 679 if (COM_ISALIVE(sc) == 0) 680 return (EIO); 681 682 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 683 } 684 685 int 686 sacomwrite(dev_t dev, struct uio *uio, int flag) 687 { 688 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 689 struct tty *tp = sc->sc_tty; 690 691 if (COM_ISALIVE(sc) == 0) 692 return (EIO); 693 694 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 695 } 696 697 int 698 sacompoll(dev_t dev, int events, struct lwp *l) 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_poll)(tp, events, l)); 707 } 708 709 struct tty * 710 sacomtty(dev_t dev) 711 { 712 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 713 struct tty *tp = sc->sc_tty; 714 715 return (tp); 716 } 717 718 int 719 sacomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 720 { 721 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 722 struct tty *tp = sc->sc_tty; 723 int error; 724 int s; 725 726 if (COM_ISALIVE(sc) == 0) 727 return (EIO); 728 729 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 730 if (error != EPASSTHROUGH) 731 return (error); 732 733 error = ttioctl(tp, cmd, data, flag, l); 734 if (error != EPASSTHROUGH) 735 return (error); 736 737 error = 0; 738 739 s = splserial(); 740 COM_LOCK(sc); 741 742 switch (cmd) { 743 case TIOCSBRK: 744 sacom_break(sc, 1); 745 break; 746 747 case TIOCCBRK: 748 sacom_break(sc, 0); 749 break; 750 751 case TIOCSDTR: 752 sacom_modem(sc, 1); 753 break; 754 755 case TIOCCDTR: 756 sacom_modem(sc, 0); 757 break; 758 759 case TIOCGFLAGS: 760 *(int *)data = sc->sc_swflags; 761 break; 762 763 case TIOCSFLAGS: 764 error = suser(l->l_proc->p_ucred, &l->l_proc->p_acflag); 765 if (error) 766 break; 767 sc->sc_swflags = *(int *)data; 768 break; 769 770 case TIOCMSET: 771 case TIOCMBIS: 772 case TIOCMBIC: 773 tiocm_to_sacom(sc, cmd, *(int *)data); 774 break; 775 776 case TIOCMGET: 777 *(int *)data = sacom_to_tiocm(sc); 778 break; 779 780 default: 781 error = EPASSTHROUGH; 782 break; 783 } 784 785 COM_UNLOCK(sc); 786 splx(s); 787 788 #ifdef COM_DEBUG 789 if (sacom_debug) 790 comstatus(sc, "comioctl "); 791 #endif 792 793 return (error); 794 } 795 796 static inline void 797 sacom_schedrx(struct sacom_softc *sc) 798 { 799 800 sc->sc_rx_ready = 1; 801 802 /* Wake up the poller. */ 803 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 804 softintr_schedule(sc->sc_si); 805 #else 806 setsoftserial(); 807 #endif 808 } 809 810 void 811 sacom_break(struct sacom_softc *sc, int onoff) 812 { 813 814 if (onoff) 815 SET(sc->sc_cr3, CR3_BRK); 816 else 817 CLR(sc->sc_cr3, CR3_BRK); 818 819 if (!sc->sc_heldchange) { 820 if (sc->sc_tx_busy) { 821 sc->sc_heldtbc = sc->sc_tbc; 822 sc->sc_tbc = 0; 823 sc->sc_heldchange = 1; 824 } else 825 sacom_loadchannelregs(sc); 826 } 827 } 828 829 void 830 sacom_modem(struct sacom_softc *sc, int onoff) 831 { 832 if (!sc->sc_heldchange) { 833 if (sc->sc_tx_busy) { 834 sc->sc_heldtbc = sc->sc_tbc; 835 sc->sc_tbc = 0; 836 sc->sc_heldchange = 1; 837 } else 838 sacom_loadchannelregs(sc); 839 } 840 } 841 842 void 843 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 844 { 845 } 846 847 int 848 sacom_to_tiocm(struct sacom_softc *sc) 849 { 850 int ttybits = 0; 851 852 if (sc->sc_cr3 != 0) 853 SET(ttybits, TIOCM_LE); 854 855 return (ttybits); 856 } 857 858 static u_int 859 cflag2cr0(tcflag_t cflag) 860 { 861 u_int cr0; 862 863 cr0 = (cflag & PARENB) ? CR0_PE : 0; 864 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 865 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 866 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 867 868 return (cr0); 869 } 870 871 int 872 sacomparam(struct tty *tp, struct termios *t) 873 { 874 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 875 int ospeed = SACOMSPEED(t->c_ospeed); 876 u_int cr0; 877 int s; 878 879 if (COM_ISALIVE(sc) == 0) 880 return (EIO); 881 882 /* Check requested parameters. */ 883 if (ospeed < 0) 884 return (EINVAL); 885 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 886 return (EINVAL); 887 888 /* 889 * For the console, always force CLOCAL and !HUPCL, so that the port 890 * is always active. 891 */ 892 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 893 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 894 SET(t->c_cflag, CLOCAL); 895 CLR(t->c_cflag, HUPCL); 896 } 897 898 /* 899 * If there were no changes, don't do anything. This avoids dropping 900 * input and improves performance when all we did was frob things like 901 * VMIN and VTIME. 902 */ 903 if (tp->t_ospeed == t->c_ospeed && 904 tp->t_cflag == t->c_cflag) 905 return (0); 906 907 cr0 = cflag2cr0(t->c_cflag); 908 909 s = splserial(); 910 COM_LOCK(sc); 911 912 sc->sc_cr0 = cr0; 913 914 sc->sc_speed = ospeed; 915 916 /* And copy to tty. */ 917 tp->t_ispeed = 0; 918 tp->t_ospeed = t->c_ospeed; 919 tp->t_cflag = t->c_cflag; 920 921 if (!sc->sc_heldchange) { 922 if (sc->sc_tx_busy) { 923 sc->sc_heldtbc = sc->sc_tbc; 924 sc->sc_tbc = 0; 925 sc->sc_heldchange = 1; 926 } else 927 sacom_loadchannelregs(sc); 928 } 929 930 if (!ISSET(t->c_cflag, CHWFLOW)) { 931 /* Disable the high water mark. */ 932 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 933 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 934 sacom_schedrx(sc); 935 } 936 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 937 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 938 sacom_hwiflow(sc); 939 } 940 } 941 942 COM_UNLOCK(sc); 943 splx(s); 944 945 (void) (*tp->t_linesw->l_modem)(tp, 1); 946 947 #ifdef COM_DEBUG 948 if (sacom_debug) 949 comstatus(sc, "comparam "); 950 #endif 951 952 return (0); 953 } 954 955 void 956 sacom_iflush(struct sacom_softc *sc) 957 { 958 bus_space_tag_t iot = sc->sc_iot; 959 bus_space_handle_t ioh = sc->sc_ioh; 960 #ifdef DIAGNOSTIC 961 int reg; 962 #endif 963 int timo; 964 965 #ifdef DIAGNOSTIC 966 reg = 0xffff; 967 #endif 968 timo = 50; 969 /* flush any pending I/O */ 970 if (sc->sc_cr3 & CR3_RXE) { 971 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 972 && --timo) 973 #ifdef DIAGNOSTIC 974 reg = 975 #else 976 (void) 977 #endif 978 bus_space_read_4(iot, ioh, SACOM_DR); 979 } 980 #if 0 981 /* XXX is it good idea to wait TX finish? */ 982 if (sc->sc_cr3 & CR3_TXE) { 983 timo = 500; 984 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 985 && --timo) 986 delay(100); 987 } 988 #endif 989 #ifdef DIAGNOSTIC 990 if (!timo) 991 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 992 reg); 993 #endif 994 } 995 996 void 997 sacom_loadchannelregs(struct sacom_softc *sc) 998 { 999 bus_space_tag_t iot = sc->sc_iot; 1000 bus_space_handle_t ioh = sc->sc_ioh; 1001 1002 /* XXXXX necessary? */ 1003 sacom_iflush(sc); 1004 1005 /* Need to stop engines first. */ 1006 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1007 1008 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1009 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1010 1011 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1012 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1013 } 1014 1015 int 1016 sacomhwiflow(struct tty *tp, int block) 1017 { 1018 #if 0 1019 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1020 int s; 1021 1022 if (COM_ISALIVE(sc) == 0) 1023 return (0); 1024 1025 if (sc->sc_mcr_rts == 0) 1026 return (0); 1027 1028 s = splserial(); 1029 COM_LOCK(sc); 1030 1031 if (block) { 1032 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1033 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1034 sacom_hwiflow(sc); 1035 } 1036 } else { 1037 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1038 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1039 sacom_schedrx(sc); 1040 } 1041 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1042 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1043 sacom_hwiflow(sc); 1044 } 1045 } 1046 1047 COM_UNLOCK(sc); 1048 splx(s); 1049 #endif 1050 return (1); 1051 } 1052 1053 /* 1054 * (un)block input via hw flowcontrol 1055 */ 1056 void 1057 sacom_hwiflow(struct sacom_softc *sc) 1058 { 1059 #if 0 1060 bus_space_tag_t iot = sc->sc_iot; 1061 bus_space_handle_t ioh = sc->sc_ioh; 1062 1063 /* XXX implement */ 1064 #endif 1065 } 1066 1067 1068 void 1069 sacomstart(struct tty *tp) 1070 { 1071 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1072 bus_space_tag_t iot = sc->sc_iot; 1073 bus_space_handle_t ioh = sc->sc_ioh; 1074 int s; 1075 1076 if (COM_ISALIVE(sc) == 0) 1077 return; 1078 1079 s = spltty(); 1080 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1081 goto out; 1082 1083 if (tp->t_outq.c_cc <= tp->t_lowat) { 1084 if (ISSET(tp->t_state, TS_ASLEEP)) { 1085 CLR(tp->t_state, TS_ASLEEP); 1086 wakeup(&tp->t_outq); 1087 } 1088 selwakeup(&tp->t_wsel); 1089 if (tp->t_outq.c_cc == 0) 1090 goto out; 1091 } 1092 1093 /* Grab the first contiguous region of buffer space. */ 1094 { 1095 u_char *tba; 1096 int tbc; 1097 1098 tba = tp->t_outq.c_cf; 1099 tbc = ndqb(&tp->t_outq, 0); 1100 1101 (void)splserial(); 1102 COM_LOCK(sc); 1103 1104 sc->sc_tba = tba; 1105 sc->sc_tbc = tbc; 1106 } 1107 1108 SET(tp->t_state, TS_BUSY); 1109 sc->sc_tx_busy = 1; 1110 1111 /* Enable transmit completion interrupts if necessary. */ 1112 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1113 SET(sc->sc_cr3, CR3_TIE); 1114 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1115 } 1116 1117 /* Output the first chunk of the contiguous buffer. */ 1118 sacom_filltx(sc); 1119 1120 COM_UNLOCK(sc); 1121 out: 1122 splx(s); 1123 return; 1124 } 1125 1126 void 1127 sacom_filltx(struct sacom_softc *sc) 1128 { 1129 bus_space_tag_t iot = sc->sc_iot; 1130 bus_space_handle_t ioh = sc->sc_ioh; 1131 int c, n; 1132 1133 n = 0; 1134 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1135 & SR1_TNF) { 1136 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1137 break; 1138 c = *(sc->sc_tba + n); 1139 c &= 0xff; 1140 bus_space_write_4(iot, ioh, SACOM_DR, c); 1141 n++; 1142 } 1143 sc->sc_tbc -= n; 1144 sc->sc_tba += n; 1145 } 1146 1147 /* 1148 * Stop output on a line. 1149 */ 1150 void 1151 sacomstop(struct tty *tp, int flag) 1152 { 1153 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1154 int s; 1155 1156 s = splserial(); 1157 COM_LOCK(sc); 1158 if (ISSET(tp->t_state, TS_BUSY)) { 1159 /* Stop transmitting at the next chunk. */ 1160 sc->sc_tbc = 0; 1161 sc->sc_heldtbc = 0; 1162 if (!ISSET(tp->t_state, TS_TTSTOP)) 1163 SET(tp->t_state, TS_FLUSH); 1164 } 1165 COM_UNLOCK(sc); 1166 splx(s); 1167 } 1168 1169 static inline void 1170 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1171 { 1172 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1173 u_char *get, *end; 1174 u_int cc, scc; 1175 u_char sr1; 1176 int code; 1177 int s; 1178 1179 end = sc->sc_ebuf; 1180 get = sc->sc_rbget; 1181 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1182 1183 while (cc) { 1184 code = get[0]; 1185 sr1 = get[1]; 1186 if (ISSET(sr1, SR1_FRE)) 1187 SET(code, TTY_FE); 1188 if (ISSET(sr1, SR1_PRE)) 1189 SET(code, TTY_PE); 1190 if ((*rint)(code, tp) == -1) { 1191 /* 1192 * The line discipline's buffer is out of space. 1193 */ 1194 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1195 /* 1196 * We're either not using flow control, or the 1197 * line discipline didn't tell us to block for 1198 * some reason. Either way, we have no way to 1199 * know when there's more space available, so 1200 * just drop the rest of the data. 1201 */ 1202 get += cc << 1; 1203 if (get >= end) 1204 get -= SACOM_RING_SIZE << 1; 1205 cc = 0; 1206 } else { 1207 /* 1208 * Don't schedule any more receive processing 1209 * until the line discipline tells us there's 1210 * space available (through comhwiflow()). 1211 * Leave the rest of the data in the input 1212 * buffer. 1213 */ 1214 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1215 } 1216 break; 1217 } 1218 get += 2; 1219 if (get >= end) 1220 get = sc->sc_rbuf; 1221 cc--; 1222 } 1223 1224 if (cc != scc) { 1225 sc->sc_rbget = get; 1226 s = splserial(); 1227 COM_LOCK(sc); 1228 1229 cc = sc->sc_rbavail += scc - cc; 1230 /* Buffers should be ok again, release possible block. */ 1231 if (cc >= 1) { 1232 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1233 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1234 SET(sc->sc_cr3, CR3_RIE); 1235 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1236 SACOM_CR3, sc->sc_cr3); 1237 } 1238 } 1239 COM_UNLOCK(sc); 1240 splx(s); 1241 } 1242 } 1243 1244 static inline void 1245 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1246 { 1247 1248 CLR(tp->t_state, TS_BUSY); 1249 if (ISSET(tp->t_state, TS_FLUSH)) 1250 CLR(tp->t_state, TS_FLUSH); 1251 else 1252 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1253 (*tp->t_linesw->l_start)(tp); 1254 } 1255 1256 static inline void 1257 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1258 { 1259 } 1260 1261 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1262 void 1263 sacomsoft(void *arg) 1264 { 1265 struct sacom_softc *sc = arg; 1266 struct tty *tp; 1267 1268 if (COM_ISALIVE(sc) == 0) 1269 return; 1270 1271 { 1272 #else 1273 void 1274 sacomsoft(void) 1275 { 1276 struct sacom_softc *sc; 1277 struct tty *tp; 1278 int unit; 1279 1280 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1281 sc = device_lookup(&sacom_cd, unit); 1282 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1283 continue; 1284 1285 if (COM_ISALIVE(sc) == 0) 1286 continue; 1287 1288 tp = sc->sc_tty; 1289 if (tp == NULL) 1290 continue; 1291 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1292 continue; 1293 #endif 1294 tp = sc->sc_tty; 1295 1296 if (sc->sc_rx_ready) { 1297 sc->sc_rx_ready = 0; 1298 sacom_rxsoft(sc, tp); 1299 } 1300 1301 if (sc->sc_st_check) { 1302 sc->sc_st_check = 0; 1303 sacom_stsoft(sc, tp); 1304 } 1305 1306 if (sc->sc_tx_done) { 1307 sc->sc_tx_done = 0; 1308 sacom_txsoft(sc, tp); 1309 } 1310 } 1311 1312 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1313 #endif 1314 } 1315 1316 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1317 /* there has got to be a better way to do comsoft() */ 1318 }} 1319 #endif 1320 1321 int 1322 sacomintr(void *arg) 1323 { 1324 struct sacom_softc *sc = arg; 1325 bus_space_tag_t iot = sc->sc_iot; 1326 bus_space_handle_t ioh = sc->sc_ioh; 1327 u_char *put, *end; 1328 u_int cc; 1329 u_int sr0, sr1; 1330 1331 if (COM_ISALIVE(sc) == 0) 1332 return (0); 1333 1334 COM_LOCK(sc); 1335 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1336 if (! sr0) { 1337 COM_UNLOCK(sc); 1338 return (0); 1339 } 1340 if (ISSET(sr0, SR0_EIF)) 1341 /* XXX silently discard error bits */ 1342 bus_space_read_4(iot, ioh, SACOM_DR); 1343 if (ISSET(sr0, SR0_RBB)) 1344 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1345 if (ISSET(sr0, SR0_REB)) { 1346 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1347 #if defined(DDB) || defined(KGDB) 1348 #ifndef DDB_BREAK_CHAR 1349 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1350 console_debugger(); 1351 } 1352 #endif 1353 #endif /* DDB || KGDB */ 1354 } 1355 1356 1357 end = sc->sc_ebuf; 1358 put = sc->sc_rbput; 1359 cc = sc->sc_rbavail; 1360 1361 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1362 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1363 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1364 while (cc > 0) { 1365 if (!ISSET(sr1, SR1_RNE)) { 1366 bus_space_write_4(iot, ioh, SACOM_SR0, 1367 SR0_RID); 1368 break; 1369 } 1370 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1371 put[1] = sr1; 1372 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1373 if (put[0] == DDB_BREAK_CHAR && 1374 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1375 console_debugger(); 1376 1377 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1378 continue; 1379 } 1380 #endif 1381 put += 2; 1382 if (put >= end) 1383 put = sc->sc_rbuf; 1384 cc--; 1385 1386 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1387 } 1388 1389 /* 1390 * Current string of incoming characters ended because 1391 * no more data was available or we ran out of space. 1392 * Schedule a receive event if any data was received. 1393 * If we're out of space, turn off receive interrupts. 1394 */ 1395 sc->sc_rbput = put; 1396 sc->sc_rbavail = cc; 1397 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1398 sc->sc_rx_ready = 1; 1399 1400 /* XXX do RX hardware flow control */ 1401 1402 /* 1403 * If we're out of space, disable receive interrupts 1404 * until the queue has drained a bit. 1405 */ 1406 if (!cc) { 1407 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1408 CLR(sc->sc_cr3, CR3_RIE); 1409 bus_space_write_4(iot, ioh, SACOM_CR3, 1410 sc->sc_cr3); 1411 } 1412 } else { 1413 #ifdef DIAGNOSTIC 1414 panic("sacomintr: we shouldn't reach here"); 1415 #endif 1416 CLR(sc->sc_cr3, CR3_RIE); 1417 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1418 } 1419 } 1420 1421 /* 1422 * Done handling any receive interrupts. See if data can be 1423 * transmitted as well. Schedule tx done event if no data left 1424 * and tty was marked busy. 1425 */ 1426 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1427 if (ISSET(sr0, SR0_TFS)) { 1428 /* 1429 * If we've delayed a parameter change, do it now, and restart 1430 * output. 1431 * XXX sacom_loadchanelregs() waits TX completion, 1432 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1433 */ 1434 if (sc->sc_heldchange) { 1435 sacom_loadchannelregs(sc); 1436 sc->sc_heldchange = 0; 1437 sc->sc_tbc = sc->sc_heldtbc; 1438 sc->sc_heldtbc = 0; 1439 } 1440 1441 /* Output the next chunk of the contiguous buffer, if any. */ 1442 if (sc->sc_tbc > 0) { 1443 sacom_filltx(sc); 1444 } else { 1445 /* Disable transmit completion interrupts if necessary. */ 1446 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1447 CLR(sc->sc_cr3, CR3_TIE); 1448 bus_space_write_4(iot, ioh, SACOM_CR3, 1449 sc->sc_cr3); 1450 } 1451 if (sc->sc_tx_busy) { 1452 sc->sc_tx_busy = 0; 1453 sc->sc_tx_done = 1; 1454 } 1455 } 1456 } 1457 COM_UNLOCK(sc); 1458 1459 /* Wake up the poller. */ 1460 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1461 softintr_schedule(sc->sc_si); 1462 #else 1463 setsoftserial(); 1464 #endif 1465 1466 #if NRND > 0 && defined(RND_COM) 1467 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1468 #endif 1469 return (1); 1470 } 1471 1472 static void 1473 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1474 1475 /* XXX this should be done at sc->enable function */ 1476 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1477 SAGPIO_PCR, 0xa0000); 1478 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1479 SAGPIO_PSR, 0x100); 1480 } 1481 1482 /* Initialization for serial console */ 1483 int 1484 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1485 bus_space_handle_t *iohp) 1486 { 1487 int brd, cr0; 1488 1489 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1490 printf("register map failed\n"); 1491 1492 /* wait for the Tx queue to drain and disable the UART */ 1493 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1494 ; 1495 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1496 1497 cr0 = cflag2cr0(cflag); 1498 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1499 1500 brd = SACOMSPEED(baud); 1501 sacomconsrate = baud; 1502 sacomconsaddr = iobase; 1503 sacomconscflag = cflag; 1504 /* XXX assumes little endian */ 1505 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1506 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1507 1508 /* enable the UART */ 1509 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1510 1511 return (0); 1512 } 1513 1514 void 1515 sacomcnprobe(struct consdev *cp) 1516 { 1517 cp->cn_pri = CN_REMOTE; 1518 } 1519 1520 void 1521 sacomcninit(struct consdev *cp) 1522 { 1523 if (cp == NULL) { 1524 /* XXX cp == NULL means that MMU is disabled. */ 1525 sacomconsioh = SACOM3_HW_BASE; 1526 sacomconstag = &sa11x0_bs_tag; 1527 cn_tab = &sacomcons; 1528 return; 1529 } 1530 1531 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1532 CONMODE, &sacomconsioh)) 1533 panic("can't init serial console @%x", CONADDR); 1534 cn_tab = &sacomcons; 1535 sacomconstag = &sa11x0_bs_tag; 1536 } 1537 1538 int 1539 sacomcngetc(dev_t dev) 1540 { 1541 int c, s; 1542 1543 s = spltty(); /* XXX do we need this? */ 1544 1545 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1546 & SR1_RNE)) { 1547 #if defined(DDB) || defined(KGDB) 1548 #ifndef DDB_BREAK_CHAR 1549 u_int sr0; 1550 extern int db_active; 1551 1552 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1553 if (ISSET(sr0, SR0_RBB)) 1554 bus_space_write_4(sacomconstag, sacomconsioh, 1555 SACOM_SR0, SR0_RBB); 1556 if (ISSET(sr0, SR0_REB)) { 1557 bus_space_write_4(sacomconstag, sacomconsioh, 1558 SACOM_SR0, SR0_REB); 1559 if (db_active == 0) 1560 console_debugger(); 1561 } 1562 #endif 1563 #endif /* DDB || KGDB */ 1564 } 1565 1566 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1567 c &= 0xff; 1568 splx(s); 1569 1570 return (c); 1571 } 1572 1573 void 1574 sacomcnputc(dev_t dev, int c) 1575 { 1576 int s; 1577 1578 s = spltty(); /* XXX do we need this? */ 1579 1580 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1581 & SR1_TNF)) 1582 ; 1583 1584 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1585 splx(s); 1586 } 1587 1588 void 1589 sacomcnpollc(dev_t dev, int on) 1590 { 1591 1592 } 1593 1594 #if 0 1595 #ifdef DEBUG 1596 int 1597 sacomcncharpoll(void) 1598 { 1599 int c; 1600 1601 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1602 & SR1_RNE)) 1603 return -1; 1604 1605 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1606 c &= 0xff; 1607 1608 return (c); 1609 } 1610 #endif 1611 #endif 1612 1613 /* helper function to identify the com ports used by 1614 console or KGDB (and not yet autoconf attached) */ 1615 int 1616 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1617 bus_space_handle_t *ioh) 1618 { 1619 bus_space_handle_t help; 1620 1621 if (! sacomconsattached && 1622 iot == sacomconstag && iobase == sacomconsaddr) 1623 help = sacomconsioh; 1624 else 1625 return (0); 1626 1627 if (ioh) 1628 *ioh = help; 1629 return (1); 1630 } 1631
Indexes created Tue Oct 14 15:09:51 GMT 2025