sa11x0_com.c revision 1.44
1 /* $NetBSD: sa11x0_com.c,v 1.44 2008/06/11 22:37:21 cegger 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 1.44 2008/06/11 22:37:21 cegger 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_private(&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 = 630 device_lookup_private(&sacom_cd, COMUNIT(dev)); 631 struct tty *tp = sc->sc_tty; 632 633 /* XXX This is for cons.c. */ 634 if (!ISSET(tp->t_state, TS_ISOPEN)) 635 return 0; 636 637 (*tp->t_linesw->l_close)(tp, flag); 638 ttyclose(tp); 639 640 if (COM_ISALIVE(sc) == 0) 641 return 0; 642 643 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 644 /* 645 * Although we got a last close, the device may still be in 646 * use; e.g. if this was the dialout node, and there are still 647 * processes waiting for carrier on the non-dialout node. 648 */ 649 sacom_shutdown(sc); 650 } 651 652 return 0; 653 } 654 655 int 656 sacomread(dev_t dev, struct uio *uio, int flag) 657 { 658 struct sacom_softc *sc = 659 device_lookup_private(&sacom_cd, COMUNIT(dev)); 660 struct tty *tp = sc->sc_tty; 661 662 if (COM_ISALIVE(sc) == 0) 663 return EIO; 664 665 return (*tp->t_linesw->l_read)(tp, uio, flag); 666 } 667 668 int 669 sacomwrite(dev_t dev, struct uio *uio, int flag) 670 { 671 struct sacom_softc *sc = 672 device_lookup_private(&sacom_cd, COMUNIT(dev)); 673 struct tty *tp = sc->sc_tty; 674 675 if (COM_ISALIVE(sc) == 0) 676 return EIO; 677 678 return (*tp->t_linesw->l_write)(tp, uio, flag); 679 } 680 681 int 682 sacompoll(dev_t dev, int events, struct lwp *l) 683 { 684 struct sacom_softc *sc = 685 device_lookup_private(&sacom_cd, COMUNIT(dev)); 686 struct tty *tp = sc->sc_tty; 687 688 if (COM_ISALIVE(sc) == 0) 689 return EIO; 690 691 return (*tp->t_linesw->l_poll)(tp, events, l); 692 } 693 694 struct tty * 695 sacomtty(dev_t dev) 696 { 697 struct sacom_softc *sc = 698 device_lookup_private(&sacom_cd, COMUNIT(dev)); 699 struct tty *tp = sc->sc_tty; 700 701 return tp; 702 } 703 704 int 705 sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 706 { 707 struct sacom_softc *sc = 708 device_lookup_private(&sacom_cd, COMUNIT(dev)); 709 struct tty *tp = sc->sc_tty; 710 int error; 711 int s; 712 713 if (COM_ISALIVE(sc) == 0) 714 return EIO; 715 716 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 717 if (error != EPASSTHROUGH) 718 return error; 719 720 error = ttioctl(tp, cmd, data, flag, l); 721 if (error != EPASSTHROUGH) 722 return error; 723 724 error = 0; 725 726 s = splserial(); 727 COM_LOCK(sc); 728 729 switch (cmd) { 730 case TIOCSBRK: 731 sacom_break(sc, 1); 732 break; 733 734 case TIOCCBRK: 735 sacom_break(sc, 0); 736 break; 737 738 case TIOCSDTR: 739 sacom_modem(sc, 1); 740 break; 741 742 case TIOCCDTR: 743 sacom_modem(sc, 0); 744 break; 745 746 case TIOCGFLAGS: 747 *(int *)data = sc->sc_swflags; 748 break; 749 750 case TIOCSFLAGS: 751 error = kauth_authorize_device_tty(l->l_cred, 752 KAUTH_DEVICE_TTY_PRIVSET, tp); 753 if (error) 754 break; 755 sc->sc_swflags = *(int *)data; 756 break; 757 758 case TIOCMSET: 759 case TIOCMBIS: 760 case TIOCMBIC: 761 tiocm_to_sacom(sc, cmd, *(int *)data); 762 break; 763 764 case TIOCMGET: 765 *(int *)data = sacom_to_tiocm(sc); 766 break; 767 768 default: 769 error = EPASSTHROUGH; 770 break; 771 } 772 773 COM_UNLOCK(sc); 774 splx(s); 775 776 #ifdef COM_DEBUG 777 if (sacom_debug) 778 comstatus(sc, "comioctl "); 779 #endif 780 781 return error; 782 } 783 784 static inline void 785 sacom_schedrx(struct sacom_softc *sc) 786 { 787 788 sc->sc_rx_ready = 1; 789 790 /* Wake up the poller. */ 791 softint_schedule(sc->sc_si); 792 } 793 794 void 795 sacom_break(struct sacom_softc *sc, int onoff) 796 { 797 798 if (onoff) 799 SET(sc->sc_cr3, CR3_BRK); 800 else 801 CLR(sc->sc_cr3, CR3_BRK); 802 803 if (!sc->sc_heldchange) { 804 if (sc->sc_tx_busy) { 805 sc->sc_heldtbc = sc->sc_tbc; 806 sc->sc_tbc = 0; 807 sc->sc_heldchange = 1; 808 } else 809 sacom_loadchannelregs(sc); 810 } 811 } 812 813 void 814 sacom_modem(struct sacom_softc *sc, int onoff) 815 { 816 if (!sc->sc_heldchange) { 817 if (sc->sc_tx_busy) { 818 sc->sc_heldtbc = sc->sc_tbc; 819 sc->sc_tbc = 0; 820 sc->sc_heldchange = 1; 821 } else 822 sacom_loadchannelregs(sc); 823 } 824 } 825 826 void 827 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 828 { 829 } 830 831 int 832 sacom_to_tiocm(struct sacom_softc *sc) 833 { 834 int ttybits = 0; 835 836 if (sc->sc_cr3 != 0) 837 SET(ttybits, TIOCM_LE); 838 839 return ttybits; 840 } 841 842 static u_int 843 cflag2cr0(tcflag_t cflag) 844 { 845 u_int cr0; 846 847 cr0 = (cflag & PARENB) ? CR0_PE : 0; 848 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 849 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 850 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 851 852 return cr0; 853 } 854 855 int 856 sacomparam(struct tty *tp, struct termios *t) 857 { 858 struct sacom_softc *sc = 859 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 860 int ospeed = SACOMSPEED(t->c_ospeed); 861 u_int cr0; 862 int s; 863 864 if (COM_ISALIVE(sc) == 0) 865 return EIO; 866 867 /* Check requested parameters. */ 868 if (ospeed < 0) 869 return EINVAL; 870 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 871 return EINVAL; 872 873 /* 874 * For the console, always force CLOCAL and !HUPCL, so that the port 875 * is always active. 876 */ 877 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 878 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 879 SET(t->c_cflag, CLOCAL); 880 CLR(t->c_cflag, HUPCL); 881 } 882 883 /* 884 * If there were no changes, don't do anything. This avoids dropping 885 * input and improves performance when all we did was frob things like 886 * VMIN and VTIME. 887 */ 888 if (tp->t_ospeed == t->c_ospeed && 889 tp->t_cflag == t->c_cflag) 890 return 0; 891 892 cr0 = cflag2cr0(t->c_cflag); 893 894 s = splserial(); 895 COM_LOCK(sc); 896 897 sc->sc_cr0 = cr0; 898 899 sc->sc_speed = ospeed; 900 901 /* And copy to tty. */ 902 tp->t_ispeed = 0; 903 tp->t_ospeed = t->c_ospeed; 904 tp->t_cflag = t->c_cflag; 905 906 if (!sc->sc_heldchange) { 907 if (sc->sc_tx_busy) { 908 sc->sc_heldtbc = sc->sc_tbc; 909 sc->sc_tbc = 0; 910 sc->sc_heldchange = 1; 911 } else 912 sacom_loadchannelregs(sc); 913 } 914 915 if (!ISSET(t->c_cflag, CHWFLOW)) { 916 /* Disable the high water mark. */ 917 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 918 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 919 sacom_schedrx(sc); 920 } 921 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 922 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 923 sacom_hwiflow(sc); 924 } 925 } 926 927 COM_UNLOCK(sc); 928 splx(s); 929 930 (void) (*tp->t_linesw->l_modem)(tp, 1); 931 932 #ifdef COM_DEBUG 933 if (sacom_debug) 934 comstatus(sc, "comparam "); 935 #endif 936 937 return 0; 938 } 939 940 void 941 sacom_iflush(struct sacom_softc *sc) 942 { 943 bus_space_tag_t iot = sc->sc_iot; 944 bus_space_handle_t ioh = sc->sc_ioh; 945 #ifdef DIAGNOSTIC 946 int reg; 947 #endif 948 int timo; 949 950 #ifdef DIAGNOSTIC 951 reg = 0xffff; 952 #endif 953 timo = 50; 954 /* flush any pending I/O */ 955 if (sc->sc_cr3 & CR3_RXE) { 956 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 957 && --timo) 958 #ifdef DIAGNOSTIC 959 reg = 960 #else 961 (void) 962 #endif 963 bus_space_read_4(iot, ioh, SACOM_DR); 964 } 965 #if 0 966 /* XXX is it good idea to wait TX finish? */ 967 if (sc->sc_cr3 & CR3_TXE) { 968 timo = 500; 969 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 970 && --timo) 971 delay(100); 972 } 973 #endif 974 #ifdef DIAGNOSTIC 975 if (!timo) 976 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 977 reg); 978 #endif 979 } 980 981 void 982 sacom_loadchannelregs(struct sacom_softc *sc) 983 { 984 bus_space_tag_t iot = sc->sc_iot; 985 bus_space_handle_t ioh = sc->sc_ioh; 986 987 /* XXXXX necessary? */ 988 sacom_iflush(sc); 989 990 /* Need to stop engines first. */ 991 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 992 993 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 994 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 995 996 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 997 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 998 } 999 1000 int 1001 sacomhwiflow(struct tty *tp, int block) 1002 { 1003 #if 0 1004 struct sacom_softc *sc = 1005 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1006 int s; 1007 1008 if (COM_ISALIVE(sc) == 0) 1009 return 0; 1010 1011 if (sc->sc_mcr_rts == 0) 1012 return 0; 1013 1014 s = splserial(); 1015 COM_LOCK(sc); 1016 1017 if (block) { 1018 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1019 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1020 sacom_hwiflow(sc); 1021 } 1022 } else { 1023 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1024 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1025 sacom_schedrx(sc); 1026 } 1027 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1028 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1029 sacom_hwiflow(sc); 1030 } 1031 } 1032 1033 COM_UNLOCK(sc); 1034 splx(s); 1035 #endif 1036 return 1; 1037 } 1038 1039 /* 1040 * (un)block input via hw flowcontrol 1041 */ 1042 void 1043 sacom_hwiflow(struct sacom_softc *sc) 1044 { 1045 #if 0 1046 bus_space_tag_t iot = sc->sc_iot; 1047 bus_space_handle_t ioh = sc->sc_ioh; 1048 1049 /* XXX implement */ 1050 #endif 1051 } 1052 1053 1054 void 1055 sacomstart(struct tty *tp) 1056 { 1057 struct sacom_softc *sc = 1058 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1059 bus_space_tag_t iot = sc->sc_iot; 1060 bus_space_handle_t ioh = sc->sc_ioh; 1061 int s; 1062 1063 if (COM_ISALIVE(sc) == 0) 1064 return; 1065 1066 s = spltty(); 1067 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1068 goto out; 1069 if (!ttypull(tp)) 1070 goto out; 1071 1072 /* Grab the first contiguous region of buffer space. */ 1073 { 1074 u_char *tba; 1075 int tbc; 1076 1077 tba = tp->t_outq.c_cf; 1078 tbc = ndqb(&tp->t_outq, 0); 1079 1080 (void)splserial(); 1081 COM_LOCK(sc); 1082 1083 sc->sc_tba = tba; 1084 sc->sc_tbc = tbc; 1085 } 1086 1087 SET(tp->t_state, TS_BUSY); 1088 sc->sc_tx_busy = 1; 1089 1090 /* Enable transmit completion interrupts if necessary. */ 1091 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1092 SET(sc->sc_cr3, CR3_TIE); 1093 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1094 } 1095 1096 /* Output the first chunk of the contiguous buffer. */ 1097 sacom_filltx(sc); 1098 1099 COM_UNLOCK(sc); 1100 out: 1101 splx(s); 1102 return; 1103 } 1104 1105 void 1106 sacom_filltx(struct sacom_softc *sc) 1107 { 1108 bus_space_tag_t iot = sc->sc_iot; 1109 bus_space_handle_t ioh = sc->sc_ioh; 1110 int c, n; 1111 1112 n = 0; 1113 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1114 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1115 break; 1116 c = *(sc->sc_tba + n); 1117 c &= 0xff; 1118 bus_space_write_4(iot, ioh, SACOM_DR, c); 1119 n++; 1120 } 1121 sc->sc_tbc -= n; 1122 sc->sc_tba += n; 1123 } 1124 1125 /* 1126 * Stop output on a line. 1127 */ 1128 void 1129 sacomstop(struct tty *tp, int flag) 1130 { 1131 struct sacom_softc *sc = 1132 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1133 int s; 1134 1135 s = splserial(); 1136 COM_LOCK(sc); 1137 if (ISSET(tp->t_state, TS_BUSY)) { 1138 /* Stop transmitting at the next chunk. */ 1139 sc->sc_tbc = 0; 1140 sc->sc_heldtbc = 0; 1141 if (!ISSET(tp->t_state, TS_TTSTOP)) 1142 SET(tp->t_state, TS_FLUSH); 1143 } 1144 COM_UNLOCK(sc); 1145 splx(s); 1146 } 1147 1148 static inline void 1149 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1150 { 1151 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1152 u_char *get, *end; 1153 u_int cc, scc; 1154 u_char sr1; 1155 int code; 1156 int s; 1157 1158 end = sc->sc_ebuf; 1159 get = sc->sc_rbget; 1160 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1161 1162 while (cc) { 1163 code = get[0]; 1164 sr1 = get[1]; 1165 if (ISSET(sr1, SR1_FRE)) 1166 SET(code, TTY_FE); 1167 if (ISSET(sr1, SR1_PRE)) 1168 SET(code, TTY_PE); 1169 if ((*rint)(code, tp) == -1) { 1170 /* 1171 * The line discipline's buffer is out of space. 1172 */ 1173 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1174 /* 1175 * We're either not using flow control, or the 1176 * line discipline didn't tell us to block for 1177 * some reason. Either way, we have no way to 1178 * know when there's more space available, so 1179 * just drop the rest of the data. 1180 */ 1181 get += cc << 1; 1182 if (get >= end) 1183 get -= SACOM_RING_SIZE << 1; 1184 cc = 0; 1185 } else { 1186 /* 1187 * Don't schedule any more receive processing 1188 * until the line discipline tells us there's 1189 * space available (through comhwiflow()). 1190 * Leave the rest of the data in the input 1191 * buffer. 1192 */ 1193 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1194 } 1195 break; 1196 } 1197 get += 2; 1198 if (get >= end) 1199 get = sc->sc_rbuf; 1200 cc--; 1201 } 1202 1203 if (cc != scc) { 1204 sc->sc_rbget = get; 1205 s = splserial(); 1206 COM_LOCK(sc); 1207 1208 cc = sc->sc_rbavail += scc - cc; 1209 /* Buffers should be ok again, release possible block. */ 1210 if (cc >= 1) { 1211 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1212 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1213 SET(sc->sc_cr3, CR3_RIE); 1214 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1215 SACOM_CR3, sc->sc_cr3); 1216 } 1217 } 1218 COM_UNLOCK(sc); 1219 splx(s); 1220 } 1221 } 1222 1223 static inline void 1224 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1225 { 1226 1227 CLR(tp->t_state, TS_BUSY); 1228 if (ISSET(tp->t_state, TS_FLUSH)) 1229 CLR(tp->t_state, TS_FLUSH); 1230 else 1231 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1232 (*tp->t_linesw->l_start)(tp); 1233 } 1234 1235 static inline void 1236 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1237 { 1238 } 1239 1240 void 1241 sacomsoft(void *arg) 1242 { 1243 struct sacom_softc *sc = arg; 1244 struct tty *tp; 1245 1246 if (COM_ISALIVE(sc) == 0) 1247 return; 1248 1249 tp = sc->sc_tty; 1250 1251 if (sc->sc_rx_ready) { 1252 sc->sc_rx_ready = 0; 1253 sacom_rxsoft(sc, tp); 1254 } 1255 1256 if (sc->sc_st_check) { 1257 sc->sc_st_check = 0; 1258 sacom_stsoft(sc, tp); 1259 } 1260 1261 if (sc->sc_tx_done) { 1262 sc->sc_tx_done = 0; 1263 sacom_txsoft(sc, tp); 1264 } 1265 } 1266 1267 int 1268 sacomintr(void *arg) 1269 { 1270 struct sacom_softc *sc = arg; 1271 bus_space_tag_t iot = sc->sc_iot; 1272 bus_space_handle_t ioh = sc->sc_ioh; 1273 u_char *put, *end; 1274 u_int cc; 1275 u_int sr0, sr1; 1276 1277 if (COM_ISALIVE(sc) == 0) 1278 return 0; 1279 1280 COM_LOCK(sc); 1281 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1282 if (!sr0) { 1283 COM_UNLOCK(sc); 1284 return 0; 1285 } 1286 if (ISSET(sr0, SR0_EIF)) 1287 /* XXX silently discard error bits */ 1288 bus_space_read_4(iot, ioh, SACOM_DR); 1289 if (ISSET(sr0, SR0_RBB)) 1290 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1291 if (ISSET(sr0, SR0_REB)) { 1292 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1293 #if defined(DDB) || defined(KGDB) 1294 #ifndef DDB_BREAK_CHAR 1295 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1296 console_debugger(); 1297 } 1298 #endif 1299 #endif /* DDB || KGDB */ 1300 } 1301 1302 1303 end = sc->sc_ebuf; 1304 put = sc->sc_rbput; 1305 cc = sc->sc_rbavail; 1306 1307 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1308 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1309 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1310 while (cc > 0) { 1311 if (!ISSET(sr1, SR1_RNE)) { 1312 bus_space_write_4(iot, ioh, SACOM_SR0, 1313 SR0_RID); 1314 break; 1315 } 1316 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1317 put[1] = sr1; 1318 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1319 if (put[0] == DDB_BREAK_CHAR && 1320 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1321 console_debugger(); 1322 1323 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1324 continue; 1325 } 1326 #endif 1327 put += 2; 1328 if (put >= end) 1329 put = sc->sc_rbuf; 1330 cc--; 1331 1332 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1333 } 1334 1335 /* 1336 * Current string of incoming characters ended because 1337 * no more data was available or we ran out of space. 1338 * Schedule a receive event if any data was received. 1339 * If we're out of space, turn off receive interrupts. 1340 */ 1341 sc->sc_rbput = put; 1342 sc->sc_rbavail = cc; 1343 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1344 sc->sc_rx_ready = 1; 1345 1346 /* XXX do RX hardware flow control */ 1347 1348 /* 1349 * If we're out of space, disable receive interrupts 1350 * until the queue has drained a bit. 1351 */ 1352 if (!cc) { 1353 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1354 CLR(sc->sc_cr3, CR3_RIE); 1355 bus_space_write_4(iot, ioh, SACOM_CR3, 1356 sc->sc_cr3); 1357 } 1358 } else { 1359 #ifdef DIAGNOSTIC 1360 panic("sacomintr: we shouldn't reach here"); 1361 #endif 1362 CLR(sc->sc_cr3, CR3_RIE); 1363 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1364 } 1365 } 1366 1367 /* 1368 * Done handling any receive interrupts. See if data can be 1369 * transmitted as well. Schedule tx done event if no data left 1370 * and tty was marked busy. 1371 */ 1372 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1373 if (ISSET(sr0, SR0_TFS)) { 1374 /* 1375 * If we've delayed a parameter change, do it now, and restart 1376 * output. 1377 * XXX sacom_loadchannelregs() waits TX completion, 1378 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1379 */ 1380 if (sc->sc_heldchange) { 1381 sacom_loadchannelregs(sc); 1382 sc->sc_heldchange = 0; 1383 sc->sc_tbc = sc->sc_heldtbc; 1384 sc->sc_heldtbc = 0; 1385 } 1386 1387 /* Output the next chunk of the contiguous buffer, if any. */ 1388 if (sc->sc_tbc > 0) { 1389 sacom_filltx(sc); 1390 } else { 1391 /* Disable transmit completion interrupts if necessary. */ 1392 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1393 CLR(sc->sc_cr3, CR3_TIE); 1394 bus_space_write_4(iot, ioh, SACOM_CR3, 1395 sc->sc_cr3); 1396 } 1397 if (sc->sc_tx_busy) { 1398 sc->sc_tx_busy = 0; 1399 sc->sc_tx_done = 1; 1400 } 1401 } 1402 } 1403 COM_UNLOCK(sc); 1404 1405 /* Wake up the poller. */ 1406 softint_schedule(sc->sc_si); 1407 1408 #if NRND > 0 && defined(RND_COM) 1409 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1410 #endif 1411 return 1; 1412 } 1413 1414 static void 1415 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1416 1417 /* XXX this should be done at sc->enable function */ 1418 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1419 SAGPIO_PCR, 0xa0000); 1420 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1421 SAGPIO_PSR, 0x100); 1422 } 1423 1424 /* Initialization for serial console */ 1425 int 1426 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1427 bus_space_handle_t *iohp) 1428 { 1429 int brd, cr0; 1430 1431 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1432 printf("register map failed\n"); 1433 1434 /* wait for the Tx queue to drain and disable the UART */ 1435 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1436 continue; 1437 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1438 1439 cr0 = cflag2cr0(cflag); 1440 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1441 1442 brd = SACOMSPEED(baud); 1443 sacomconsrate = baud; 1444 sacomconsaddr = iobase; 1445 sacomconscflag = cflag; 1446 /* XXX assumes little endian */ 1447 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1448 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1449 1450 /* enable the UART */ 1451 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1452 1453 return 0; 1454 } 1455 1456 void 1457 sacomcnprobe(struct consdev *cp) 1458 { 1459 cp->cn_pri = CN_REMOTE; 1460 } 1461 1462 void 1463 sacomcninit(struct consdev *cp) 1464 { 1465 if (cp == NULL) { 1466 /* XXX cp == NULL means that MMU is disabled. */ 1467 sacomconsioh = SACOM3_BASE; 1468 sacomconstag = &sa11x0_bs_tag; 1469 cn_tab = &sacomcons; 1470 return; 1471 } 1472 1473 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1474 CONMODE, &sacomconsioh)) 1475 panic("can't init serial console @%x", CONADDR); 1476 cn_tab = &sacomcons; 1477 sacomconstag = &sa11x0_bs_tag; 1478 } 1479 1480 int 1481 sacomcngetc(dev_t dev) 1482 { 1483 int c, s; 1484 1485 s = spltty(); /* XXX do we need this? */ 1486 1487 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1488 & SR1_RNE)) { 1489 #if defined(DDB) || defined(KGDB) 1490 #ifndef DDB_BREAK_CHAR 1491 u_int sr0; 1492 extern int db_active; 1493 1494 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1495 if (ISSET(sr0, SR0_RBB)) 1496 bus_space_write_4(sacomconstag, sacomconsioh, 1497 SACOM_SR0, SR0_RBB); 1498 if (ISSET(sr0, SR0_REB)) { 1499 bus_space_write_4(sacomconstag, sacomconsioh, 1500 SACOM_SR0, SR0_REB); 1501 if (db_active == 0) 1502 console_debugger(); 1503 } 1504 #endif 1505 #endif /* DDB || KGDB */ 1506 } 1507 1508 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1509 c &= 0xff; 1510 splx(s); 1511 1512 return c; 1513 } 1514 1515 void 1516 sacomcnputc(dev_t dev, int c) 1517 { 1518 int s; 1519 1520 s = spltty(); /* XXX do we need this? */ 1521 1522 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1523 & SR1_TNF)) 1524 continue; 1525 1526 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1527 splx(s); 1528 } 1529 1530 void 1531 sacomcnpollc(dev_t dev, int on) 1532 { 1533 1534 } 1535 1536 #if 0 1537 #ifdef DEBUG 1538 int 1539 sacomcncharpoll(void) 1540 { 1541 int c; 1542 1543 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1544 & SR1_RNE)) 1545 return -1; 1546 1547 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1548 c &= 0xff; 1549 1550 return c; 1551 } 1552 #endif 1553 #endif 1554 1555 /* helper function to identify the com ports used by 1556 console or KGDB (and not yet autoconf attached) */ 1557 int 1558 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1559 bus_space_handle_t *ioh) 1560 { 1561 bus_space_handle_t help; 1562 1563 if (!sacomconsattached && 1564 iot == sacomconstag && iobase == sacomconsaddr) 1565 help = sacomconsioh; 1566 else 1567 return 0; 1568 1569 if (ioh) 1570 *ioh = help; 1571 return 1; 1572 } 1573
Indexes created Fri Oct 03 02:09:57 GMT 2025