sa11x0_com.c revision 1.42.6.1
1 /* $NetBSD: sa11x0_com.c,v 1.42.6.1 2008/06/02 13:21:55 mjf 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 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1991 The Regents of the University of California. 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * @(#)com.c 7.5 (Berkeley) 5/16/91 64 */ 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.42.6.1 2008/06/02 13:21:55 mjf Exp $"); 68 69 #include "opt_com.h" 70 #include "opt_ddb.h" 71 #include "opt_ddbparam.h" 72 #include "opt_kgdb.h" 73 #include "opt_multiprocessor.h" 74 #include "opt_lockdebug.h" 75 76 #include "rnd.h" 77 #if NRND > 0 && defined(RND_COM) 78 #include <sys/rnd.h> 79 #endif 80 81 #include <sys/param.h> 82 #include <sys/systm.h> 83 #include <sys/types.h> 84 #include <sys/conf.h> 85 #include <sys/file.h> 86 #include <sys/device.h> 87 #include <sys/kernel.h> 88 #include <sys/malloc.h> 89 #include <sys/tty.h> 90 #include <sys/uio.h> 91 #include <sys/vnode.h> 92 #include <sys/kauth.h> 93 94 #include <dev/cons.h> 95 96 #include <machine/bus.h> 97 #include <arm/sa11x0/sa11x0_reg.h> 98 #include <arm/sa11x0/sa11x0_var.h> 99 #include <arm/sa11x0/sa11x0_comreg.h> 100 #include <arm/sa11x0/sa11x0_comvar.h> 101 #include <arm/sa11x0/sa11x0_gpioreg.h> 102 103 #ifdef hpcarm 104 #include <hpc/include/platid.h> 105 #include <hpc/include/platid_mask.h> 106 #endif 107 108 #include "sacom.h" 109 110 dev_type_open(sacomopen); 111 dev_type_close(sacomclose); 112 dev_type_read(sacomread); 113 dev_type_write(sacomwrite); 114 dev_type_ioctl(sacomioctl); 115 dev_type_stop(sacomstop); 116 dev_type_tty(sacomtty); 117 dev_type_poll(sacompoll); 118 119 const struct cdevsw sacom_cdevsw = { 120 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 121 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 122 }; 123 124 static int sacom_match(struct device *, struct cfdata *, void *); 125 static void sacom_attach(struct device *, struct device *, void *); 126 static void sacom_filltx(struct sacom_softc *); 127 static void sacom_attach_subr(struct sacom_softc *); 128 #if defined(DDB) || defined(KGDB) 129 static void sacom_enable_debugport(struct sacom_softc *); 130 #endif 131 int sacom_detach(struct device *, int); 132 void sacom_config(struct sacom_softc *); 133 int sacom_activate(struct device *, enum devact); 134 void sacom_shutdown(struct sacom_softc *); 135 static u_int cflag2cr0(tcflag_t); 136 int sacomparam(struct tty *, struct termios *); 137 void sacomstart(struct tty *); 138 int sacomhwiflow(struct tty *, int); 139 140 void sacom_loadchannelregs(struct sacom_softc *); 141 void sacom_hwiflow(struct sacom_softc *); 142 void sacom_break(struct sacom_softc *, int); 143 void sacom_modem(struct sacom_softc *, int); 144 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 145 int sacom_to_tiocm(struct sacom_softc *); 146 void sacom_iflush(struct sacom_softc *); 147 148 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 149 bus_space_handle_t *); 150 int sacom_is_console(bus_space_tag_t, bus_addr_t, 151 bus_space_handle_t *); 152 153 void sacomsoft(void *); 154 155 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 156 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 157 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 158 static inline void sacom_schedrx(struct sacom_softc *); 159 160 #ifdef hpcarm 161 /* HPCARM specific functions */ 162 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 163 #endif 164 165 #define COMUNIT_MASK 0x7ffff 166 #define COMDIALOUT_MASK 0x80000 167 168 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 169 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 170 171 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 172 device_is_active(&(sc)->sc_dev)) 173 174 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 175 #define COM_LOCK(sc) 176 #define COM_UNLOCK(sc) 177 178 int sacomintr(void *); 179 int sacomcngetc(dev_t); 180 void sacomcnputc(dev_t, int); 181 void sacomcnpollc(dev_t, int); 182 183 void sacomcnprobe(struct consdev *); 184 void sacomcninit(struct consdev *); 185 186 extern struct bus_space sa11x0_bs_tag; 187 188 static bus_space_tag_t sacomconstag; 189 static bus_space_handle_t sacomconsioh; 190 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 191 192 static int sacomconsattached; 193 static int sacomconsrate; 194 static tcflag_t sacomconscflag; 195 196 CFATTACH_DECL(sacom, sizeof(struct sacom_softc), 197 sacom_match, sacom_attach, NULL, NULL); 198 extern struct cfdriver sacom_cd; 199 200 #ifdef hpcarm 201 struct platid_data sacom_platid_table[] = { 202 { &platid_mask_MACH_HP_JORNADA_7XX, sacom_j720_init }, 203 { NULL, NULL } 204 }; 205 #endif 206 207 struct consdev sacomcons = { 208 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 209 NULL, NULL, NODEV, CN_NORMAL 210 }; 211 212 #ifndef CONMODE 213 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 214 #endif 215 #ifndef CONSPEED 216 #define CONSPEED 9600 217 #endif 218 #ifndef CONADDR 219 #define CONADDR SACOM3_BASE 220 #endif 221 222 static int 223 sacom_match(struct device *parent, struct cfdata *match, void *aux) 224 { 225 226 return 1; 227 } 228 229 void 230 sacom_attach(struct device *parent, struct device *self, void *aux) 231 { 232 struct sacom_softc *sc = (struct sacom_softc*)self; 233 struct sa11x0_attach_args *sa = aux; 234 235 #ifdef hpcarm 236 struct platid_data *p; 237 void (*mdinit)(struct device *, struct sacom_softc *); 238 #endif 239 240 printf("\n"); 241 242 sc->sc_iot = sa->sa_iot; 243 sc->sc_baseaddr = sa->sa_addr; 244 245 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 246 &sc->sc_ioh)) { 247 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 248 return; 249 } 250 251 printf("%s: ", sc->sc_dev.dv_xname); 252 switch (sc->sc_baseaddr) { 253 case SACOM1_BASE: 254 printf("SA-11x0 UART1\n"); 255 break; 256 case SACOM2_BASE: 257 printf("SA-11x0 UART2 (IRDA)\n"); 258 break; 259 case SACOM3_BASE: 260 printf("SA-11x0 UART3\n"); 261 break; 262 default: 263 printf("unknown SA-11x0 UART\n"); 264 break; 265 } 266 267 sacom_attach_subr(sc); 268 269 #ifdef hpcarm 270 /* Do hpcarm specific initialization, if any */ 271 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 272 mdinit = p->data; 273 (mdinit)(parent, sc); 274 } 275 #endif 276 277 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 278 } 279 280 void 281 sacom_attach_subr(struct sacom_softc *sc) 282 { 283 bus_addr_t iobase = sc->sc_baseaddr; 284 bus_space_tag_t iot = sc->sc_iot; 285 struct tty *tp; 286 287 /* XXX Do we need to disable interrupts here? */ 288 289 if (iot == sacomconstag && iobase == sacomconsaddr) { 290 sacomconsattached = 1; 291 sc->sc_speed = SACOMSPEED(sacomconsrate); 292 293 /* Make sure the console is always "hardwired". */ 294 delay(10000); /* wait for output to finish */ 295 SET(sc->sc_hwflags, COM_HW_CONSOLE); 296 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 297 } 298 299 tp = ttymalloc(); 300 tp->t_oproc = sacomstart; 301 tp->t_param = sacomparam; 302 tp->t_hwiflow = sacomhwiflow; 303 304 sc->sc_tty = tp; 305 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 306 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 307 sc->sc_rbavail = SACOM_RING_SIZE; 308 if (sc->sc_rbuf == NULL) { 309 printf("%s: unable to allocate ring buffer\n", 310 sc->sc_dev.dv_xname); 311 return; 312 } 313 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 314 sc->sc_tbc = 0; 315 316 tty_attach(tp); 317 318 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 319 int maj; 320 321 /* locate the major number */ 322 maj = cdevsw_lookup_major(&sacom_cdevsw); 323 324 cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev)); 325 326 delay(10000); /* XXX */ 327 printf("%s: console\n", sc->sc_dev.dv_xname); 328 delay(10000); /* XXX */ 329 } 330 331 332 sc->sc_si = softint_establish(SOFTINT_SERIAL, sacomsoft, sc); 333 334 #if NRND > 0 && defined(RND_COM) 335 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 336 RND_TYPE_TTY, 0); 337 #endif 338 339 /* if there are no enable/disable functions, assume the device 340 is always enabled */ 341 if (!sc->enable) 342 sc->enabled = 1; 343 344 sacom_config(sc); 345 346 SET(sc->sc_hwflags, COM_HW_DEV_OK); 347 } 348 349 /* This is necessary when dynamically changing SAIP configuration. */ 350 int 351 sacom_detach(struct device *self, int flags) 352 { 353 struct sacom_softc *sc = (struct sacom_softc *)self; 354 int maj, mn; 355 356 /* locate the major number */ 357 maj = cdevsw_lookup_major(&sacom_cdevsw); 358 359 /* Nuke the vnodes for any open instances. */ 360 mn = device_unit(self); 361 vdevgone(maj, mn, mn, VCHR); 362 363 mn |= COMDIALOUT_MASK; 364 vdevgone(maj, mn, mn, VCHR); 365 366 /* Free the receive buffer. */ 367 free(sc->sc_rbuf, M_DEVBUF); 368 369 /* Detach and free the tty. */ 370 tty_detach(sc->sc_tty); 371 ttyfree(sc->sc_tty); 372 373 /* Unhook the soft interrupt handler. */ 374 softint_disestablish(sc->sc_si); 375 376 #if NRND > 0 && defined(RND_COM) 377 /* Unhook the entropy source. */ 378 rnd_detach_source(&sc->rnd_source); 379 #endif 380 381 return 0; 382 } 383 384 void 385 sacom_config(struct sacom_softc *sc) 386 { 387 bus_space_tag_t iot = sc->sc_iot; 388 bus_space_handle_t ioh = sc->sc_ioh; 389 390 /* Disable engine before configuring the device. */ 391 sc->sc_cr3 = 0; 392 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 393 394 #ifdef DDB 395 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 396 sacom_enable_debugport(sc); 397 #endif 398 } 399 400 #ifdef DDB 401 static void 402 sacom_enable_debugport(struct sacom_softc *sc) 403 { 404 bus_space_tag_t iot = sc->sc_iot; 405 bus_space_handle_t ioh = sc->sc_ioh; 406 int s; 407 408 s = splserial(); 409 COM_LOCK(sc); 410 sc->sc_cr3 = CR3_RXE | CR3_TXE; 411 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 412 COM_UNLOCK(sc); 413 splx(s); 414 } 415 #endif 416 417 int 418 sacom_activate(struct device *self, enum devact act) 419 { 420 struct sacom_softc *sc = (struct sacom_softc *)self; 421 int s, rv = 0; 422 423 s = splserial(); 424 COM_LOCK(sc); 425 switch (act) { 426 case DVACT_ACTIVATE: 427 rv = EOPNOTSUPP; 428 break; 429 430 case DVACT_DEACTIVATE: 431 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 432 rv = EBUSY; 433 break; 434 } 435 436 if (sc->disable != NULL && sc->enabled != 0) { 437 (*sc->disable)(sc); 438 sc->enabled = 0; 439 } 440 break; 441 } 442 443 COM_UNLOCK(sc); 444 splx(s); 445 return rv; 446 } 447 448 void 449 sacom_shutdown(struct sacom_softc *sc) 450 { 451 struct tty *tp = sc->sc_tty; 452 int s; 453 454 s = splserial(); 455 COM_LOCK(sc); 456 457 /* Clear any break condition set with TIOCSBRK. */ 458 sacom_break(sc, 0); 459 460 /* 461 * Hang up if necessary. Wait a bit, so the other side has time to 462 * notice even if we immediately open the port again. 463 * Avoid tsleeping above splhigh(). 464 */ 465 if (ISSET(tp->t_cflag, HUPCL)) { 466 sacom_modem(sc, 0); 467 COM_UNLOCK(sc); 468 splx(s); 469 /* XXX tsleep will only timeout */ 470 (void) tsleep(sc, TTIPRI, ttclos, hz); 471 s = splserial(); 472 COM_LOCK(sc); 473 } 474 475 /* Turn off interrupts. */ 476 sc->sc_cr3 = 0; 477 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 478 479 if (sc->disable) { 480 #ifdef DIAGNOSTIC 481 if (!sc->enabled) 482 panic("sacom_shutdown: not enabled?"); 483 #endif 484 (*sc->disable)(sc); 485 sc->enabled = 0; 486 } 487 COM_UNLOCK(sc); 488 splx(s); 489 } 490 491 int 492 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 493 { 494 struct sacom_softc *sc; 495 struct tty *tp; 496 int s, s2; 497 int error; 498 499 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 500 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 501 sc->sc_rbuf == NULL) 502 return ENXIO; 503 504 if (!device_is_active(&sc->sc_dev)) 505 return ENXIO; 506 507 tp = sc->sc_tty; 508 509 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 510 return (EBUSY); 511 512 s = spltty(); 513 514 /* 515 * Do the following iff this is a first open. 516 */ 517 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 518 struct termios t; 519 520 tp->t_dev = dev; 521 522 s2 = splserial(); 523 COM_LOCK(sc); 524 525 if (sc->enable) { 526 if ((*sc->enable)(sc)) { 527 COM_UNLOCK(sc); 528 splx(s2); 529 splx(s); 530 printf("%s: device enable failed\n", 531 sc->sc_dev.dv_xname); 532 return EIO; 533 } 534 sc->enabled = 1; 535 sacom_config(sc); 536 } 537 538 /* Turn on interrupts. */ 539 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 540 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 541 sc->sc_cr3); 542 543 544 COM_UNLOCK(sc); 545 splx(s2); 546 547 /* 548 * Initialize the termios status to the defaults. Add in the 549 * sticky bits from TIOCSFLAGS. 550 */ 551 t.c_ispeed = 0; 552 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 553 t.c_ospeed = sacomconsrate; 554 t.c_cflag = sacomconscflag; 555 } else { 556 t.c_ospeed = TTYDEF_SPEED; 557 t.c_cflag = TTYDEF_CFLAG; 558 } 559 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 560 SET(t.c_cflag, CLOCAL); 561 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 562 SET(t.c_cflag, CRTSCTS); 563 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 564 SET(t.c_cflag, MDMBUF); 565 /* Make sure sacomparam() will do something. */ 566 tp->t_ospeed = 0; 567 (void) sacomparam(tp, &t); 568 tp->t_iflag = TTYDEF_IFLAG; 569 tp->t_oflag = TTYDEF_OFLAG; 570 tp->t_lflag = TTYDEF_LFLAG; 571 ttychars(tp); 572 ttsetwater(tp); 573 574 s2 = splserial(); 575 COM_LOCK(sc); 576 577 /* 578 * Turn on DTR. We must always do this, even if carrier is not 579 * present, because otherwise we'd have to use TIOCSDTR 580 * immediately after setting CLOCAL, which applications do not 581 * expect. We always assert DTR while the device is open 582 * unless explicitly requested to deassert it. 583 */ 584 sacom_modem(sc, 1); 585 586 /* Clear the input ring, and unblock. */ 587 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 588 sc->sc_rbavail = SACOM_RING_SIZE; 589 sacom_iflush(sc); 590 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 591 sacom_hwiflow(sc); 592 593 #ifdef COM_DEBUG 594 if (sacom_debug) 595 comstatus(sc, "sacomopen "); 596 #endif 597 598 COM_UNLOCK(sc); 599 splx(s2); 600 } 601 602 splx(s); 603 604 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 605 if (error) 606 goto bad; 607 608 error = (*tp->t_linesw->l_open)(dev, tp); 609 if (error) 610 goto bad; 611 612 return 0; 613 614 bad: 615 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 616 /* 617 * We failed to open the device, and nobody else had it opened. 618 * Clean up the state as appropriate. 619 */ 620 sacom_shutdown(sc); 621 } 622 623 return error; 624 } 625 626 int 627 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 628 { 629 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 630 struct tty *tp = sc->sc_tty; 631 632 /* XXX This is for cons.c. */ 633 if (!ISSET(tp->t_state, TS_ISOPEN)) 634 return 0; 635 636 (*tp->t_linesw->l_close)(tp, flag); 637 ttyclose(tp); 638 639 if (COM_ISALIVE(sc) == 0) 640 return 0; 641 642 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 643 /* 644 * Although we got a last close, the device may still be in 645 * use; e.g. if this was the dialout node, and there are still 646 * processes waiting for carrier on the non-dialout node. 647 */ 648 sacom_shutdown(sc); 649 } 650 651 return 0; 652 } 653 654 int 655 sacomread(dev_t dev, struct uio *uio, int flag) 656 { 657 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 658 struct tty *tp = sc->sc_tty; 659 660 if (COM_ISALIVE(sc) == 0) 661 return EIO; 662 663 return (*tp->t_linesw->l_read)(tp, uio, flag); 664 } 665 666 int 667 sacomwrite(dev_t dev, struct uio *uio, int flag) 668 { 669 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 670 struct tty *tp = sc->sc_tty; 671 672 if (COM_ISALIVE(sc) == 0) 673 return EIO; 674 675 return (*tp->t_linesw->l_write)(tp, uio, flag); 676 } 677 678 int 679 sacompoll(dev_t dev, int events, struct lwp *l) 680 { 681 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 682 struct tty *tp = sc->sc_tty; 683 684 if (COM_ISALIVE(sc) == 0) 685 return EIO; 686 687 return (*tp->t_linesw->l_poll)(tp, events, l); 688 } 689 690 struct tty * 691 sacomtty(dev_t dev) 692 { 693 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 694 struct tty *tp = sc->sc_tty; 695 696 return tp; 697 } 698 699 int 700 sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 701 { 702 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 703 struct tty *tp = sc->sc_tty; 704 int error; 705 int s; 706 707 if (COM_ISALIVE(sc) == 0) 708 return EIO; 709 710 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 711 if (error != EPASSTHROUGH) 712 return error; 713 714 error = ttioctl(tp, cmd, data, flag, l); 715 if (error != EPASSTHROUGH) 716 return error; 717 718 error = 0; 719 720 s = splserial(); 721 COM_LOCK(sc); 722 723 switch (cmd) { 724 case TIOCSBRK: 725 sacom_break(sc, 1); 726 break; 727 728 case TIOCCBRK: 729 sacom_break(sc, 0); 730 break; 731 732 case TIOCSDTR: 733 sacom_modem(sc, 1); 734 break; 735 736 case TIOCCDTR: 737 sacom_modem(sc, 0); 738 break; 739 740 case TIOCGFLAGS: 741 *(int *)data = sc->sc_swflags; 742 break; 743 744 case TIOCSFLAGS: 745 error = kauth_authorize_device_tty(l->l_cred, 746 KAUTH_DEVICE_TTY_PRIVSET, tp); 747 if (error) 748 break; 749 sc->sc_swflags = *(int *)data; 750 break; 751 752 case TIOCMSET: 753 case TIOCMBIS: 754 case TIOCMBIC: 755 tiocm_to_sacom(sc, cmd, *(int *)data); 756 break; 757 758 case TIOCMGET: 759 *(int *)data = sacom_to_tiocm(sc); 760 break; 761 762 default: 763 error = EPASSTHROUGH; 764 break; 765 } 766 767 COM_UNLOCK(sc); 768 splx(s); 769 770 #ifdef COM_DEBUG 771 if (sacom_debug) 772 comstatus(sc, "comioctl "); 773 #endif 774 775 return error; 776 } 777 778 static inline void 779 sacom_schedrx(struct sacom_softc *sc) 780 { 781 782 sc->sc_rx_ready = 1; 783 784 /* Wake up the poller. */ 785 softint_schedule(sc->sc_si); 786 } 787 788 void 789 sacom_break(struct sacom_softc *sc, int onoff) 790 { 791 792 if (onoff) 793 SET(sc->sc_cr3, CR3_BRK); 794 else 795 CLR(sc->sc_cr3, CR3_BRK); 796 797 if (!sc->sc_heldchange) { 798 if (sc->sc_tx_busy) { 799 sc->sc_heldtbc = sc->sc_tbc; 800 sc->sc_tbc = 0; 801 sc->sc_heldchange = 1; 802 } else 803 sacom_loadchannelregs(sc); 804 } 805 } 806 807 void 808 sacom_modem(struct sacom_softc *sc, int onoff) 809 { 810 if (!sc->sc_heldchange) { 811 if (sc->sc_tx_busy) { 812 sc->sc_heldtbc = sc->sc_tbc; 813 sc->sc_tbc = 0; 814 sc->sc_heldchange = 1; 815 } else 816 sacom_loadchannelregs(sc); 817 } 818 } 819 820 void 821 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 822 { 823 } 824 825 int 826 sacom_to_tiocm(struct sacom_softc *sc) 827 { 828 int ttybits = 0; 829 830 if (sc->sc_cr3 != 0) 831 SET(ttybits, TIOCM_LE); 832 833 return ttybits; 834 } 835 836 static u_int 837 cflag2cr0(tcflag_t cflag) 838 { 839 u_int cr0; 840 841 cr0 = (cflag & PARENB) ? CR0_PE : 0; 842 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 843 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 844 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 845 846 return cr0; 847 } 848 849 int 850 sacomparam(struct tty *tp, struct termios *t) 851 { 852 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 853 int ospeed = SACOMSPEED(t->c_ospeed); 854 u_int cr0; 855 int s; 856 857 if (COM_ISALIVE(sc) == 0) 858 return EIO; 859 860 /* Check requested parameters. */ 861 if (ospeed < 0) 862 return EINVAL; 863 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 864 return EINVAL; 865 866 /* 867 * For the console, always force CLOCAL and !HUPCL, so that the port 868 * is always active. 869 */ 870 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 871 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 872 SET(t->c_cflag, CLOCAL); 873 CLR(t->c_cflag, HUPCL); 874 } 875 876 /* 877 * If there were no changes, don't do anything. This avoids dropping 878 * input and improves performance when all we did was frob things like 879 * VMIN and VTIME. 880 */ 881 if (tp->t_ospeed == t->c_ospeed && 882 tp->t_cflag == t->c_cflag) 883 return 0; 884 885 cr0 = cflag2cr0(t->c_cflag); 886 887 s = splserial(); 888 COM_LOCK(sc); 889 890 sc->sc_cr0 = cr0; 891 892 sc->sc_speed = ospeed; 893 894 /* And copy to tty. */ 895 tp->t_ispeed = 0; 896 tp->t_ospeed = t->c_ospeed; 897 tp->t_cflag = t->c_cflag; 898 899 if (!sc->sc_heldchange) { 900 if (sc->sc_tx_busy) { 901 sc->sc_heldtbc = sc->sc_tbc; 902 sc->sc_tbc = 0; 903 sc->sc_heldchange = 1; 904 } else 905 sacom_loadchannelregs(sc); 906 } 907 908 if (!ISSET(t->c_cflag, CHWFLOW)) { 909 /* Disable the high water mark. */ 910 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 911 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 912 sacom_schedrx(sc); 913 } 914 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 915 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 916 sacom_hwiflow(sc); 917 } 918 } 919 920 COM_UNLOCK(sc); 921 splx(s); 922 923 (void) (*tp->t_linesw->l_modem)(tp, 1); 924 925 #ifdef COM_DEBUG 926 if (sacom_debug) 927 comstatus(sc, "comparam "); 928 #endif 929 930 return 0; 931 } 932 933 void 934 sacom_iflush(struct sacom_softc *sc) 935 { 936 bus_space_tag_t iot = sc->sc_iot; 937 bus_space_handle_t ioh = sc->sc_ioh; 938 #ifdef DIAGNOSTIC 939 int reg; 940 #endif 941 int timo; 942 943 #ifdef DIAGNOSTIC 944 reg = 0xffff; 945 #endif 946 timo = 50; 947 /* flush any pending I/O */ 948 if (sc->sc_cr3 & CR3_RXE) { 949 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 950 && --timo) 951 #ifdef DIAGNOSTIC 952 reg = 953 #else 954 (void) 955 #endif 956 bus_space_read_4(iot, ioh, SACOM_DR); 957 } 958 #if 0 959 /* XXX is it good idea to wait TX finish? */ 960 if (sc->sc_cr3 & CR3_TXE) { 961 timo = 500; 962 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 963 && --timo) 964 delay(100); 965 } 966 #endif 967 #ifdef DIAGNOSTIC 968 if (!timo) 969 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 970 reg); 971 #endif 972 } 973 974 void 975 sacom_loadchannelregs(struct sacom_softc *sc) 976 { 977 bus_space_tag_t iot = sc->sc_iot; 978 bus_space_handle_t ioh = sc->sc_ioh; 979 980 /* XXXXX necessary? */ 981 sacom_iflush(sc); 982 983 /* Need to stop engines first. */ 984 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 985 986 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 987 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 988 989 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 990 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 991 } 992 993 int 994 sacomhwiflow(struct tty *tp, int block) 995 { 996 #if 0 997 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 998 int s; 999 1000 if (COM_ISALIVE(sc) == 0) 1001 return 0; 1002 1003 if (sc->sc_mcr_rts == 0) 1004 return 0; 1005 1006 s = splserial(); 1007 COM_LOCK(sc); 1008 1009 if (block) { 1010 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1011 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1012 sacom_hwiflow(sc); 1013 } 1014 } else { 1015 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1016 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1017 sacom_schedrx(sc); 1018 } 1019 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1020 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1021 sacom_hwiflow(sc); 1022 } 1023 } 1024 1025 COM_UNLOCK(sc); 1026 splx(s); 1027 #endif 1028 return 1; 1029 } 1030 1031 /* 1032 * (un)block input via hw flowcontrol 1033 */ 1034 void 1035 sacom_hwiflow(struct sacom_softc *sc) 1036 { 1037 #if 0 1038 bus_space_tag_t iot = sc->sc_iot; 1039 bus_space_handle_t ioh = sc->sc_ioh; 1040 1041 /* XXX implement */ 1042 #endif 1043 } 1044 1045 1046 void 1047 sacomstart(struct tty *tp) 1048 { 1049 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1050 bus_space_tag_t iot = sc->sc_iot; 1051 bus_space_handle_t ioh = sc->sc_ioh; 1052 int s; 1053 1054 if (COM_ISALIVE(sc) == 0) 1055 return; 1056 1057 s = spltty(); 1058 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1059 goto out; 1060 if (!ttypull(tp)) 1061 goto out; 1062 1063 /* Grab the first contiguous region of buffer space. */ 1064 { 1065 u_char *tba; 1066 int tbc; 1067 1068 tba = tp->t_outq.c_cf; 1069 tbc = ndqb(&tp->t_outq, 0); 1070 1071 (void)splserial(); 1072 COM_LOCK(sc); 1073 1074 sc->sc_tba = tba; 1075 sc->sc_tbc = tbc; 1076 } 1077 1078 SET(tp->t_state, TS_BUSY); 1079 sc->sc_tx_busy = 1; 1080 1081 /* Enable transmit completion interrupts if necessary. */ 1082 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1083 SET(sc->sc_cr3, CR3_TIE); 1084 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1085 } 1086 1087 /* Output the first chunk of the contiguous buffer. */ 1088 sacom_filltx(sc); 1089 1090 COM_UNLOCK(sc); 1091 out: 1092 splx(s); 1093 return; 1094 } 1095 1096 void 1097 sacom_filltx(struct sacom_softc *sc) 1098 { 1099 bus_space_tag_t iot = sc->sc_iot; 1100 bus_space_handle_t ioh = sc->sc_ioh; 1101 int c, n; 1102 1103 n = 0; 1104 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1105 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1106 break; 1107 c = *(sc->sc_tba + n); 1108 c &= 0xff; 1109 bus_space_write_4(iot, ioh, SACOM_DR, c); 1110 n++; 1111 } 1112 sc->sc_tbc -= n; 1113 sc->sc_tba += n; 1114 } 1115 1116 /* 1117 * Stop output on a line. 1118 */ 1119 void 1120 sacomstop(struct tty *tp, int flag) 1121 { 1122 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1123 int s; 1124 1125 s = splserial(); 1126 COM_LOCK(sc); 1127 if (ISSET(tp->t_state, TS_BUSY)) { 1128 /* Stop transmitting at the next chunk. */ 1129 sc->sc_tbc = 0; 1130 sc->sc_heldtbc = 0; 1131 if (!ISSET(tp->t_state, TS_TTSTOP)) 1132 SET(tp->t_state, TS_FLUSH); 1133 } 1134 COM_UNLOCK(sc); 1135 splx(s); 1136 } 1137 1138 static inline void 1139 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1140 { 1141 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1142 u_char *get, *end; 1143 u_int cc, scc; 1144 u_char sr1; 1145 int code; 1146 int s; 1147 1148 end = sc->sc_ebuf; 1149 get = sc->sc_rbget; 1150 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1151 1152 while (cc) { 1153 code = get[0]; 1154 sr1 = get[1]; 1155 if (ISSET(sr1, SR1_FRE)) 1156 SET(code, TTY_FE); 1157 if (ISSET(sr1, SR1_PRE)) 1158 SET(code, TTY_PE); 1159 if ((*rint)(code, tp) == -1) { 1160 /* 1161 * The line discipline's buffer is out of space. 1162 */ 1163 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1164 /* 1165 * We're either not using flow control, or the 1166 * line discipline didn't tell us to block for 1167 * some reason. Either way, we have no way to 1168 * know when there's more space available, so 1169 * just drop the rest of the data. 1170 */ 1171 get += cc << 1; 1172 if (get >= end) 1173 get -= SACOM_RING_SIZE << 1; 1174 cc = 0; 1175 } else { 1176 /* 1177 * Don't schedule any more receive processing 1178 * until the line discipline tells us there's 1179 * space available (through comhwiflow()). 1180 * Leave the rest of the data in the input 1181 * buffer. 1182 */ 1183 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1184 } 1185 break; 1186 } 1187 get += 2; 1188 if (get >= end) 1189 get = sc->sc_rbuf; 1190 cc--; 1191 } 1192 1193 if (cc != scc) { 1194 sc->sc_rbget = get; 1195 s = splserial(); 1196 COM_LOCK(sc); 1197 1198 cc = sc->sc_rbavail += scc - cc; 1199 /* Buffers should be ok again, release possible block. */ 1200 if (cc >= 1) { 1201 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1202 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1203 SET(sc->sc_cr3, CR3_RIE); 1204 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1205 SACOM_CR3, sc->sc_cr3); 1206 } 1207 } 1208 COM_UNLOCK(sc); 1209 splx(s); 1210 } 1211 } 1212 1213 static inline void 1214 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1215 { 1216 1217 CLR(tp->t_state, TS_BUSY); 1218 if (ISSET(tp->t_state, TS_FLUSH)) 1219 CLR(tp->t_state, TS_FLUSH); 1220 else 1221 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1222 (*tp->t_linesw->l_start)(tp); 1223 } 1224 1225 static inline void 1226 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1227 { 1228 } 1229 1230 void 1231 sacomsoft(void *arg) 1232 { 1233 struct sacom_softc *sc = arg; 1234 struct tty *tp; 1235 1236 if (COM_ISALIVE(sc) == 0) 1237 return; 1238 1239 tp = sc->sc_tty; 1240 1241 if (sc->sc_rx_ready) { 1242 sc->sc_rx_ready = 0; 1243 sacom_rxsoft(sc, tp); 1244 } 1245 1246 if (sc->sc_st_check) { 1247 sc->sc_st_check = 0; 1248 sacom_stsoft(sc, tp); 1249 } 1250 1251 if (sc->sc_tx_done) { 1252 sc->sc_tx_done = 0; 1253 sacom_txsoft(sc, tp); 1254 } 1255 } 1256 1257 int 1258 sacomintr(void *arg) 1259 { 1260 struct sacom_softc *sc = arg; 1261 bus_space_tag_t iot = sc->sc_iot; 1262 bus_space_handle_t ioh = sc->sc_ioh; 1263 u_char *put, *end; 1264 u_int cc; 1265 u_int sr0, sr1; 1266 1267 if (COM_ISALIVE(sc) == 0) 1268 return 0; 1269 1270 COM_LOCK(sc); 1271 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1272 if (!sr0) { 1273 COM_UNLOCK(sc); 1274 return 0; 1275 } 1276 if (ISSET(sr0, SR0_EIF)) 1277 /* XXX silently discard error bits */ 1278 bus_space_read_4(iot, ioh, SACOM_DR); 1279 if (ISSET(sr0, SR0_RBB)) 1280 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1281 if (ISSET(sr0, SR0_REB)) { 1282 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1283 #if defined(DDB) || defined(KGDB) 1284 #ifndef DDB_BREAK_CHAR 1285 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1286 console_debugger(); 1287 } 1288 #endif 1289 #endif /* DDB || KGDB */ 1290 } 1291 1292 1293 end = sc->sc_ebuf; 1294 put = sc->sc_rbput; 1295 cc = sc->sc_rbavail; 1296 1297 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1298 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1299 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1300 while (cc > 0) { 1301 if (!ISSET(sr1, SR1_RNE)) { 1302 bus_space_write_4(iot, ioh, SACOM_SR0, 1303 SR0_RID); 1304 break; 1305 } 1306 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1307 put[1] = sr1; 1308 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1309 if (put[0] == DDB_BREAK_CHAR && 1310 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1311 console_debugger(); 1312 1313 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1314 continue; 1315 } 1316 #endif 1317 put += 2; 1318 if (put >= end) 1319 put = sc->sc_rbuf; 1320 cc--; 1321 1322 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1323 } 1324 1325 /* 1326 * Current string of incoming characters ended because 1327 * no more data was available or we ran out of space. 1328 * Schedule a receive event if any data was received. 1329 * If we're out of space, turn off receive interrupts. 1330 */ 1331 sc->sc_rbput = put; 1332 sc->sc_rbavail = cc; 1333 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1334 sc->sc_rx_ready = 1; 1335 1336 /* XXX do RX hardware flow control */ 1337 1338 /* 1339 * If we're out of space, disable receive interrupts 1340 * until the queue has drained a bit. 1341 */ 1342 if (!cc) { 1343 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1344 CLR(sc->sc_cr3, CR3_RIE); 1345 bus_space_write_4(iot, ioh, SACOM_CR3, 1346 sc->sc_cr3); 1347 } 1348 } else { 1349 #ifdef DIAGNOSTIC 1350 panic("sacomintr: we shouldn't reach here"); 1351 #endif 1352 CLR(sc->sc_cr3, CR3_RIE); 1353 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1354 } 1355 } 1356 1357 /* 1358 * Done handling any receive interrupts. See if data can be 1359 * transmitted as well. Schedule tx done event if no data left 1360 * and tty was marked busy. 1361 */ 1362 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1363 if (ISSET(sr0, SR0_TFS)) { 1364 /* 1365 * If we've delayed a parameter change, do it now, and restart 1366 * output. 1367 * XXX sacom_loadchannelregs() waits TX completion, 1368 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1369 */ 1370 if (sc->sc_heldchange) { 1371 sacom_loadchannelregs(sc); 1372 sc->sc_heldchange = 0; 1373 sc->sc_tbc = sc->sc_heldtbc; 1374 sc->sc_heldtbc = 0; 1375 } 1376 1377 /* Output the next chunk of the contiguous buffer, if any. */ 1378 if (sc->sc_tbc > 0) { 1379 sacom_filltx(sc); 1380 } else { 1381 /* Disable transmit completion interrupts if necessary. */ 1382 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1383 CLR(sc->sc_cr3, CR3_TIE); 1384 bus_space_write_4(iot, ioh, SACOM_CR3, 1385 sc->sc_cr3); 1386 } 1387 if (sc->sc_tx_busy) { 1388 sc->sc_tx_busy = 0; 1389 sc->sc_tx_done = 1; 1390 } 1391 } 1392 } 1393 COM_UNLOCK(sc); 1394 1395 /* Wake up the poller. */ 1396 softint_schedule(sc->sc_si); 1397 1398 #if NRND > 0 && defined(RND_COM) 1399 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1400 #endif 1401 return 1; 1402 } 1403 1404 static void 1405 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1406 1407 /* XXX this should be done at sc->enable function */ 1408 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1409 SAGPIO_PCR, 0xa0000); 1410 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1411 SAGPIO_PSR, 0x100); 1412 } 1413 1414 /* Initialization for serial console */ 1415 int 1416 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1417 bus_space_handle_t *iohp) 1418 { 1419 int brd, cr0; 1420 1421 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1422 printf("register map failed\n"); 1423 1424 /* wait for the Tx queue to drain and disable the UART */ 1425 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1426 continue; 1427 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1428 1429 cr0 = cflag2cr0(cflag); 1430 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1431 1432 brd = SACOMSPEED(baud); 1433 sacomconsrate = baud; 1434 sacomconsaddr = iobase; 1435 sacomconscflag = cflag; 1436 /* XXX assumes little endian */ 1437 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1438 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1439 1440 /* enable the UART */ 1441 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1442 1443 return 0; 1444 } 1445 1446 void 1447 sacomcnprobe(struct consdev *cp) 1448 { 1449 cp->cn_pri = CN_REMOTE; 1450 } 1451 1452 void 1453 sacomcninit(struct consdev *cp) 1454 { 1455 if (cp == NULL) { 1456 /* XXX cp == NULL means that MMU is disabled. */ 1457 sacomconsioh = SACOM3_BASE; 1458 sacomconstag = &sa11x0_bs_tag; 1459 cn_tab = &sacomcons; 1460 return; 1461 } 1462 1463 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1464 CONMODE, &sacomconsioh)) 1465 panic("can't init serial console @%x", CONADDR); 1466 cn_tab = &sacomcons; 1467 sacomconstag = &sa11x0_bs_tag; 1468 } 1469 1470 int 1471 sacomcngetc(dev_t dev) 1472 { 1473 int c, s; 1474 1475 s = spltty(); /* XXX do we need this? */ 1476 1477 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1478 & SR1_RNE)) { 1479 #if defined(DDB) || defined(KGDB) 1480 #ifndef DDB_BREAK_CHAR 1481 u_int sr0; 1482 extern int db_active; 1483 1484 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1485 if (ISSET(sr0, SR0_RBB)) 1486 bus_space_write_4(sacomconstag, sacomconsioh, 1487 SACOM_SR0, SR0_RBB); 1488 if (ISSET(sr0, SR0_REB)) { 1489 bus_space_write_4(sacomconstag, sacomconsioh, 1490 SACOM_SR0, SR0_REB); 1491 if (db_active == 0) 1492 console_debugger(); 1493 } 1494 #endif 1495 #endif /* DDB || KGDB */ 1496 } 1497 1498 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1499 c &= 0xff; 1500 splx(s); 1501 1502 return c; 1503 } 1504 1505 void 1506 sacomcnputc(dev_t dev, int c) 1507 { 1508 int s; 1509 1510 s = spltty(); /* XXX do we need this? */ 1511 1512 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1513 & SR1_TNF)) 1514 continue; 1515 1516 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1517 splx(s); 1518 } 1519 1520 void 1521 sacomcnpollc(dev_t dev, int on) 1522 { 1523 1524 } 1525 1526 #if 0 1527 #ifdef DEBUG 1528 int 1529 sacomcncharpoll(void) 1530 { 1531 int c; 1532 1533 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1534 & SR1_RNE)) 1535 return -1; 1536 1537 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1538 c &= 0xff; 1539 1540 return c; 1541 } 1542 #endif 1543 #endif 1544 1545 /* helper function to identify the com ports used by 1546 console or KGDB (and not yet autoconf attached) */ 1547 int 1548 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1549 bus_space_handle_t *ioh) 1550 { 1551 bus_space_handle_t help; 1552 1553 if (!sacomconsattached && 1554 iot == sacomconstag && iobase == sacomconsaddr) 1555 help = sacomconsioh; 1556 else 1557 return 0; 1558 1559 if (ioh) 1560 *ioh = help; 1561 return 1; 1562 } 1563
Indexes created Wed Oct 29 12:09:47 GMT 2025