sa11x0_com.c revision 1.42.10.3
1 /* $NetBSD: sa11x0_com.c,v 1.42.10.3 2009/06/20 07:20:01 yamt 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 1.42.10.3 2009/06/20 07:20:01 yamt 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(device_t, cfdata_t, void *); 125 static void sacom_attach(device_t, device_t, 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(device_t, int); 132 void sacom_config(struct sacom_softc *); 133 int sacom_activate(device_t, 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_NEW(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(device_t parent, cfdata_t match, void *aux) 224 { 225 226 return 1; 227 } 228 229 void 230 sacom_attach(device_t parent, device_t self, void *aux) 231 { 232 struct sacom_softc *sc = device_private(self); 233 struct sa11x0_attach_args *sa = aux; 234 235 #ifdef hpcarm 236 struct platid_data *p; 237 void (*mdinit)(device_t, struct sacom_softc *); 238 #endif 239 240 aprint_normal("\n"); 241 242 sc->sc_dev = self; 243 sc->sc_iot = sa->sa_iot; 244 sc->sc_baseaddr = sa->sa_addr; 245 246 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 247 &sc->sc_ioh)) { 248 aprint_normal_dev(self, "unable to map registers\n"); 249 return; 250 } 251 252 switch (sc->sc_baseaddr) { 253 case SACOM1_BASE: 254 aprint_normal_dev(self, "SA-11x0 UART1\n"); 255 break; 256 case SACOM2_BASE: 257 aprint_normal_dev(self, "SA-11x0 UART2 (IRDA)\n"); 258 break; 259 case SACOM3_BASE: 260 aprint_normal_dev(self, "SA-11x0 UART3\n"); 261 break; 262 default: 263 aprint_normal_dev(self, "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 aprint_normal_dev(sc->sc_dev, "unable to allocate ring buffer\n"); 310 return; 311 } 312 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 313 sc->sc_tbc = 0; 314 315 tty_attach(tp); 316 317 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 318 int maj; 319 320 /* locate the major number */ 321 maj = cdevsw_lookup_major(&sacom_cdevsw); 322 323 cn_tab->cn_dev = makedev(maj, device_unit(sc->sc_dev)); 324 325 delay(10000); /* XXX */ 326 aprint_normal_dev(sc->sc_dev, "console\n"); 327 delay(10000); /* XXX */ 328 } 329 330 331 sc->sc_si = softint_establish(SOFTINT_SERIAL, sacomsoft, sc); 332 333 #if NRND > 0 && defined(RND_COM) 334 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 335 RND_TYPE_TTY, 0); 336 #endif 337 338 /* if there are no enable/disable functions, assume the device 339 is always enabled */ 340 if (!sc->enable) 341 sc->enabled = 1; 342 343 sacom_config(sc); 344 345 SET(sc->sc_hwflags, COM_HW_DEV_OK); 346 } 347 348 /* This is necessary when dynamically changing SAIP configuration. */ 349 int 350 sacom_detach(device_t dev, int flags) 351 { 352 struct sacom_softc *sc = device_private(dev); 353 int maj, mn; 354 355 /* locate the major number */ 356 maj = cdevsw_lookup_major(&sacom_cdevsw); 357 358 /* Nuke the vnodes for any open instances. */ 359 mn = device_unit(dev); 360 vdevgone(maj, mn, mn, VCHR); 361 362 mn |= COMDIALOUT_MASK; 363 vdevgone(maj, mn, mn, VCHR); 364 365 /* Free the receive buffer. */ 366 free(sc->sc_rbuf, M_DEVBUF); 367 368 /* Detach and free the tty. */ 369 tty_detach(sc->sc_tty); 370 ttyfree(sc->sc_tty); 371 372 /* Unhook the soft interrupt handler. */ 373 softint_disestablish(sc->sc_si); 374 375 #if NRND > 0 && defined(RND_COM) 376 /* Unhook the entropy source. */ 377 rnd_detach_source(&sc->rnd_source); 378 #endif 379 380 return 0; 381 } 382 383 void 384 sacom_config(struct sacom_softc *sc) 385 { 386 bus_space_tag_t iot = sc->sc_iot; 387 bus_space_handle_t ioh = sc->sc_ioh; 388 389 /* Disable engine before configuring the device. */ 390 sc->sc_cr3 = 0; 391 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 392 393 #ifdef DDB 394 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 395 sacom_enable_debugport(sc); 396 #endif 397 } 398 399 #ifdef DDB 400 static void 401 sacom_enable_debugport(struct sacom_softc *sc) 402 { 403 bus_space_tag_t iot = sc->sc_iot; 404 bus_space_handle_t ioh = sc->sc_ioh; 405 int s; 406 407 s = splserial(); 408 COM_LOCK(sc); 409 sc->sc_cr3 = CR3_RXE | CR3_TXE; 410 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 411 COM_UNLOCK(sc); 412 splx(s); 413 } 414 #endif 415 416 int 417 sacom_activate(device_t dev, enum devact act) 418 { 419 struct sacom_softc *sc = device_private(dev); 420 int s, rv = 0; 421 422 s = splserial(); 423 COM_LOCK(sc); 424 switch (act) { 425 case DVACT_ACTIVATE: 426 rv = EOPNOTSUPP; 427 break; 428 429 case DVACT_DEACTIVATE: 430 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 431 rv = EBUSY; 432 break; 433 } 434 435 if (sc->disable != NULL && sc->enabled != 0) { 436 (*sc->disable)(sc); 437 sc->enabled = 0; 438 } 439 break; 440 } 441 442 COM_UNLOCK(sc); 443 splx(s); 444 return rv; 445 } 446 447 void 448 sacom_shutdown(struct sacom_softc *sc) 449 { 450 struct tty *tp = sc->sc_tty; 451 int s; 452 453 s = splserial(); 454 COM_LOCK(sc); 455 456 /* Clear any break condition set with TIOCSBRK. */ 457 sacom_break(sc, 0); 458 459 /* 460 * Hang up if necessary. Wait a bit, so the other side has time to 461 * notice even if we immediately open the port again. 462 * Avoid tsleeping above splhigh(). 463 */ 464 if (ISSET(tp->t_cflag, HUPCL)) { 465 sacom_modem(sc, 0); 466 COM_UNLOCK(sc); 467 splx(s); 468 /* XXX tsleep will only timeout */ 469 (void) tsleep(sc, TTIPRI, ttclos, hz); 470 s = splserial(); 471 COM_LOCK(sc); 472 } 473 474 /* Turn off interrupts. */ 475 sc->sc_cr3 = 0; 476 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 477 478 if (sc->disable) { 479 #ifdef DIAGNOSTIC 480 if (!sc->enabled) 481 panic("sacom_shutdown: not enabled?"); 482 #endif 483 (*sc->disable)(sc); 484 sc->enabled = 0; 485 } 486 COM_UNLOCK(sc); 487 splx(s); 488 } 489 490 int 491 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 492 { 493 struct sacom_softc *sc; 494 struct tty *tp; 495 int s, s2; 496 int error; 497 498 sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); 499 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 500 sc->sc_rbuf == NULL) 501 return ENXIO; 502 503 if (!device_is_active(sc->sc_dev)) 504 return ENXIO; 505 506 tp = sc->sc_tty; 507 508 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 509 return (EBUSY); 510 511 s = spltty(); 512 513 /* 514 * Do the following iff this is a first open. 515 */ 516 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 517 struct termios t; 518 519 tp->t_dev = dev; 520 521 s2 = splserial(); 522 COM_LOCK(sc); 523 524 if (sc->enable) { 525 if ((*sc->enable)(sc)) { 526 COM_UNLOCK(sc); 527 splx(s2); 528 splx(s); 529 aprint_normal_dev(sc->sc_dev, "device enable failed\n"); 530 return EIO; 531 } 532 sc->enabled = 1; 533 sacom_config(sc); 534 } 535 536 /* Turn on interrupts. */ 537 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 538 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 539 sc->sc_cr3); 540 541 542 COM_UNLOCK(sc); 543 splx(s2); 544 545 /* 546 * Initialize the termios status to the defaults. Add in the 547 * sticky bits from TIOCSFLAGS. 548 */ 549 t.c_ispeed = 0; 550 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 551 t.c_ospeed = sacomconsrate; 552 t.c_cflag = sacomconscflag; 553 } else { 554 t.c_ospeed = TTYDEF_SPEED; 555 t.c_cflag = TTYDEF_CFLAG; 556 } 557 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 558 SET(t.c_cflag, CLOCAL); 559 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 560 SET(t.c_cflag, CRTSCTS); 561 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 562 SET(t.c_cflag, MDMBUF); 563 /* Make sure sacomparam() will do something. */ 564 tp->t_ospeed = 0; 565 (void) sacomparam(tp, &t); 566 tp->t_iflag = TTYDEF_IFLAG; 567 tp->t_oflag = TTYDEF_OFLAG; 568 tp->t_lflag = TTYDEF_LFLAG; 569 ttychars(tp); 570 ttsetwater(tp); 571 572 s2 = splserial(); 573 COM_LOCK(sc); 574 575 /* 576 * Turn on DTR. We must always do this, even if carrier is not 577 * present, because otherwise we'd have to use TIOCSDTR 578 * immediately after setting CLOCAL, which applications do not 579 * expect. We always assert DTR while the device is open 580 * unless explicitly requested to deassert it. 581 */ 582 sacom_modem(sc, 1); 583 584 /* Clear the input ring, and unblock. */ 585 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 586 sc->sc_rbavail = SACOM_RING_SIZE; 587 sacom_iflush(sc); 588 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 589 sacom_hwiflow(sc); 590 591 #ifdef COM_DEBUG 592 if (sacom_debug) 593 comstatus(sc, "sacomopen "); 594 #endif 595 596 COM_UNLOCK(sc); 597 splx(s2); 598 } 599 600 splx(s); 601 602 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 603 if (error) 604 goto bad; 605 606 error = (*tp->t_linesw->l_open)(dev, tp); 607 if (error) 608 goto bad; 609 610 return 0; 611 612 bad: 613 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 614 /* 615 * We failed to open the device, and nobody else had it opened. 616 * Clean up the state as appropriate. 617 */ 618 sacom_shutdown(sc); 619 } 620 621 return error; 622 } 623 624 int 625 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 626 { 627 struct sacom_softc *sc = 628 device_lookup_private(&sacom_cd, COMUNIT(dev)); 629 struct tty *tp = sc->sc_tty; 630 631 /* XXX This is for cons.c. */ 632 if (!ISSET(tp->t_state, TS_ISOPEN)) 633 return 0; 634 635 (*tp->t_linesw->l_close)(tp, flag); 636 ttyclose(tp); 637 638 if (COM_ISALIVE(sc) == 0) 639 return 0; 640 641 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 642 /* 643 * Although we got a last close, the device may still be in 644 * use; e.g. if this was the dialout node, and there are still 645 * processes waiting for carrier on the non-dialout node. 646 */ 647 sacom_shutdown(sc); 648 } 649 650 return 0; 651 } 652 653 int 654 sacomread(dev_t dev, struct uio *uio, int flag) 655 { 656 struct sacom_softc *sc = 657 device_lookup_private(&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 = 670 device_lookup_private(&sacom_cd, COMUNIT(dev)); 671 struct tty *tp = sc->sc_tty; 672 673 if (COM_ISALIVE(sc) == 0) 674 return EIO; 675 676 return (*tp->t_linesw->l_write)(tp, uio, flag); 677 } 678 679 int 680 sacompoll(dev_t dev, int events, struct lwp *l) 681 { 682 struct sacom_softc *sc = 683 device_lookup_private(&sacom_cd, COMUNIT(dev)); 684 struct tty *tp = sc->sc_tty; 685 686 if (COM_ISALIVE(sc) == 0) 687 return EIO; 688 689 return (*tp->t_linesw->l_poll)(tp, events, l); 690 } 691 692 struct tty * 693 sacomtty(dev_t dev) 694 { 695 struct sacom_softc *sc = 696 device_lookup_private(&sacom_cd, COMUNIT(dev)); 697 struct tty *tp = sc->sc_tty; 698 699 return tp; 700 } 701 702 int 703 sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 704 { 705 struct sacom_softc *sc = 706 device_lookup_private(&sacom_cd, COMUNIT(dev)); 707 struct tty *tp = sc->sc_tty; 708 int error; 709 int s; 710 711 if (COM_ISALIVE(sc) == 0) 712 return EIO; 713 714 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 715 if (error != EPASSTHROUGH) 716 return error; 717 718 error = ttioctl(tp, cmd, data, flag, l); 719 if (error != EPASSTHROUGH) 720 return error; 721 722 error = 0; 723 724 s = splserial(); 725 COM_LOCK(sc); 726 727 switch (cmd) { 728 case TIOCSBRK: 729 sacom_break(sc, 1); 730 break; 731 732 case TIOCCBRK: 733 sacom_break(sc, 0); 734 break; 735 736 case TIOCSDTR: 737 sacom_modem(sc, 1); 738 break; 739 740 case TIOCCDTR: 741 sacom_modem(sc, 0); 742 break; 743 744 case TIOCGFLAGS: 745 *(int *)data = sc->sc_swflags; 746 break; 747 748 case TIOCSFLAGS: 749 error = kauth_authorize_device_tty(l->l_cred, 750 KAUTH_DEVICE_TTY_PRIVSET, tp); 751 if (error) 752 break; 753 sc->sc_swflags = *(int *)data; 754 break; 755 756 case TIOCMSET: 757 case TIOCMBIS: 758 case TIOCMBIC: 759 tiocm_to_sacom(sc, cmd, *(int *)data); 760 break; 761 762 case TIOCMGET: 763 *(int *)data = sacom_to_tiocm(sc); 764 break; 765 766 default: 767 error = EPASSTHROUGH; 768 break; 769 } 770 771 COM_UNLOCK(sc); 772 splx(s); 773 774 #ifdef COM_DEBUG 775 if (sacom_debug) 776 comstatus(sc, "comioctl "); 777 #endif 778 779 return error; 780 } 781 782 static inline void 783 sacom_schedrx(struct sacom_softc *sc) 784 { 785 786 sc->sc_rx_ready = 1; 787 788 /* Wake up the poller. */ 789 softint_schedule(sc->sc_si); 790 } 791 792 void 793 sacom_break(struct sacom_softc *sc, int onoff) 794 { 795 796 if (onoff) 797 SET(sc->sc_cr3, CR3_BRK); 798 else 799 CLR(sc->sc_cr3, CR3_BRK); 800 801 if (!sc->sc_heldchange) { 802 if (sc->sc_tx_busy) { 803 sc->sc_heldtbc = sc->sc_tbc; 804 sc->sc_tbc = 0; 805 sc->sc_heldchange = 1; 806 } else 807 sacom_loadchannelregs(sc); 808 } 809 } 810 811 void 812 sacom_modem(struct sacom_softc *sc, int onoff) 813 { 814 if (!sc->sc_heldchange) { 815 if (sc->sc_tx_busy) { 816 sc->sc_heldtbc = sc->sc_tbc; 817 sc->sc_tbc = 0; 818 sc->sc_heldchange = 1; 819 } else 820 sacom_loadchannelregs(sc); 821 } 822 } 823 824 void 825 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 826 { 827 } 828 829 int 830 sacom_to_tiocm(struct sacom_softc *sc) 831 { 832 int ttybits = 0; 833 834 if (sc->sc_cr3 != 0) 835 SET(ttybits, TIOCM_LE); 836 837 return ttybits; 838 } 839 840 static u_int 841 cflag2cr0(tcflag_t cflag) 842 { 843 u_int cr0; 844 845 cr0 = (cflag & PARENB) ? CR0_PE : 0; 846 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 847 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 848 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 849 850 return cr0; 851 } 852 853 int 854 sacomparam(struct tty *tp, struct termios *t) 855 { 856 struct sacom_softc *sc = 857 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 858 int ospeed = SACOMSPEED(t->c_ospeed); 859 u_int cr0; 860 int s; 861 862 if (COM_ISALIVE(sc) == 0) 863 return EIO; 864 865 /* Check requested parameters. */ 866 if (ospeed < 0) 867 return EINVAL; 868 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 869 return EINVAL; 870 871 /* 872 * For the console, always force CLOCAL and !HUPCL, so that the port 873 * is always active. 874 */ 875 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 876 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 877 SET(t->c_cflag, CLOCAL); 878 CLR(t->c_cflag, HUPCL); 879 } 880 881 /* 882 * If there were no changes, don't do anything. This avoids dropping 883 * input and improves performance when all we did was frob things like 884 * VMIN and VTIME. 885 */ 886 if (tp->t_ospeed == t->c_ospeed && 887 tp->t_cflag == t->c_cflag) 888 return 0; 889 890 cr0 = cflag2cr0(t->c_cflag); 891 892 s = splserial(); 893 COM_LOCK(sc); 894 895 sc->sc_cr0 = cr0; 896 897 sc->sc_speed = ospeed; 898 899 /* And copy to tty. */ 900 tp->t_ispeed = 0; 901 tp->t_ospeed = t->c_ospeed; 902 tp->t_cflag = t->c_cflag; 903 904 if (!sc->sc_heldchange) { 905 if (sc->sc_tx_busy) { 906 sc->sc_heldtbc = sc->sc_tbc; 907 sc->sc_tbc = 0; 908 sc->sc_heldchange = 1; 909 } else 910 sacom_loadchannelregs(sc); 911 } 912 913 if (!ISSET(t->c_cflag, CHWFLOW)) { 914 /* Disable the high water mark. */ 915 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 916 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 917 sacom_schedrx(sc); 918 } 919 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 920 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 921 sacom_hwiflow(sc); 922 } 923 } 924 925 COM_UNLOCK(sc); 926 splx(s); 927 928 (void) (*tp->t_linesw->l_modem)(tp, 1); 929 930 #ifdef COM_DEBUG 931 if (sacom_debug) 932 comstatus(sc, "comparam "); 933 #endif 934 935 return 0; 936 } 937 938 void 939 sacom_iflush(struct sacom_softc *sc) 940 { 941 bus_space_tag_t iot = sc->sc_iot; 942 bus_space_handle_t ioh = sc->sc_ioh; 943 #ifdef DIAGNOSTIC 944 int reg; 945 #endif 946 int timo; 947 948 #ifdef DIAGNOSTIC 949 reg = 0xffff; 950 #endif 951 timo = 50; 952 /* flush any pending I/O */ 953 if (sc->sc_cr3 & CR3_RXE) { 954 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 955 && --timo) 956 #ifdef DIAGNOSTIC 957 reg = 958 #else 959 (void) 960 #endif 961 bus_space_read_4(iot, ioh, SACOM_DR); 962 } 963 #if 0 964 /* XXX is it good idea to wait TX finish? */ 965 if (sc->sc_cr3 & CR3_TXE) { 966 timo = 500; 967 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 968 && --timo) 969 delay(100); 970 } 971 #endif 972 #ifdef DIAGNOSTIC 973 if (!timo) 974 aprint_debug_dev(sc->sc_dev, "sacom_iflush timeout %02x\n", reg); 975 #endif 976 } 977 978 void 979 sacom_loadchannelregs(struct sacom_softc *sc) 980 { 981 bus_space_tag_t iot = sc->sc_iot; 982 bus_space_handle_t ioh = sc->sc_ioh; 983 984 /* XXXXX necessary? */ 985 sacom_iflush(sc); 986 987 /* Need to stop engines first. */ 988 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 989 990 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 991 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 992 993 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 994 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 995 } 996 997 int 998 sacomhwiflow(struct tty *tp, int block) 999 { 1000 #if 0 1001 struct sacom_softc *sc = 1002 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1003 int s; 1004 1005 if (COM_ISALIVE(sc) == 0) 1006 return 0; 1007 1008 if (sc->sc_mcr_rts == 0) 1009 return 0; 1010 1011 s = splserial(); 1012 COM_LOCK(sc); 1013 1014 if (block) { 1015 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1016 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1017 sacom_hwiflow(sc); 1018 } 1019 } else { 1020 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1021 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1022 sacom_schedrx(sc); 1023 } 1024 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1025 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1026 sacom_hwiflow(sc); 1027 } 1028 } 1029 1030 COM_UNLOCK(sc); 1031 splx(s); 1032 #endif 1033 return 1; 1034 } 1035 1036 /* 1037 * (un)block input via hw flowcontrol 1038 */ 1039 void 1040 sacom_hwiflow(struct sacom_softc *sc) 1041 { 1042 #if 0 1043 bus_space_tag_t iot = sc->sc_iot; 1044 bus_space_handle_t ioh = sc->sc_ioh; 1045 1046 /* XXX implement */ 1047 #endif 1048 } 1049 1050 1051 void 1052 sacomstart(struct tty *tp) 1053 { 1054 struct sacom_softc *sc = 1055 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1056 bus_space_tag_t iot = sc->sc_iot; 1057 bus_space_handle_t ioh = sc->sc_ioh; 1058 int s; 1059 1060 if (COM_ISALIVE(sc) == 0) 1061 return; 1062 1063 s = spltty(); 1064 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1065 goto out; 1066 if (!ttypull(tp)) 1067 goto out; 1068 1069 /* Grab the first contiguous region of buffer space. */ 1070 { 1071 u_char *tba; 1072 int tbc; 1073 1074 tba = tp->t_outq.c_cf; 1075 tbc = ndqb(&tp->t_outq, 0); 1076 1077 (void)splserial(); 1078 COM_LOCK(sc); 1079 1080 sc->sc_tba = tba; 1081 sc->sc_tbc = tbc; 1082 } 1083 1084 SET(tp->t_state, TS_BUSY); 1085 sc->sc_tx_busy = 1; 1086 1087 /* Enable transmit completion interrupts if necessary. */ 1088 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1089 SET(sc->sc_cr3, CR3_TIE); 1090 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1091 } 1092 1093 /* Output the first chunk of the contiguous buffer. */ 1094 sacom_filltx(sc); 1095 1096 COM_UNLOCK(sc); 1097 out: 1098 splx(s); 1099 return; 1100 } 1101 1102 void 1103 sacom_filltx(struct sacom_softc *sc) 1104 { 1105 bus_space_tag_t iot = sc->sc_iot; 1106 bus_space_handle_t ioh = sc->sc_ioh; 1107 int c, n; 1108 1109 n = 0; 1110 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1111 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1112 break; 1113 c = *(sc->sc_tba + n); 1114 c &= 0xff; 1115 bus_space_write_4(iot, ioh, SACOM_DR, c); 1116 n++; 1117 } 1118 sc->sc_tbc -= n; 1119 sc->sc_tba += n; 1120 } 1121 1122 /* 1123 * Stop output on a line. 1124 */ 1125 void 1126 sacomstop(struct tty *tp, int flag) 1127 { 1128 struct sacom_softc *sc = 1129 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1130 int s; 1131 1132 s = splserial(); 1133 COM_LOCK(sc); 1134 if (ISSET(tp->t_state, TS_BUSY)) { 1135 /* Stop transmitting at the next chunk. */ 1136 sc->sc_tbc = 0; 1137 sc->sc_heldtbc = 0; 1138 if (!ISSET(tp->t_state, TS_TTSTOP)) 1139 SET(tp->t_state, TS_FLUSH); 1140 } 1141 COM_UNLOCK(sc); 1142 splx(s); 1143 } 1144 1145 static inline void 1146 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1147 { 1148 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1149 u_char *get, *end; 1150 u_int cc, scc; 1151 u_char sr1; 1152 int code; 1153 int s; 1154 1155 end = sc->sc_ebuf; 1156 get = sc->sc_rbget; 1157 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1158 1159 while (cc) { 1160 code = get[0]; 1161 sr1 = get[1]; 1162 if (ISSET(sr1, SR1_FRE)) 1163 SET(code, TTY_FE); 1164 if (ISSET(sr1, SR1_PRE)) 1165 SET(code, TTY_PE); 1166 if ((*rint)(code, tp) == -1) { 1167 /* 1168 * The line discipline's buffer is out of space. 1169 */ 1170 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1171 /* 1172 * We're either not using flow control, or the 1173 * line discipline didn't tell us to block for 1174 * some reason. Either way, we have no way to 1175 * know when there's more space available, so 1176 * just drop the rest of the data. 1177 */ 1178 get += cc << 1; 1179 if (get >= end) 1180 get -= SACOM_RING_SIZE << 1; 1181 cc = 0; 1182 } else { 1183 /* 1184 * Don't schedule any more receive processing 1185 * until the line discipline tells us there's 1186 * space available (through comhwiflow()). 1187 * Leave the rest of the data in the input 1188 * buffer. 1189 */ 1190 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1191 } 1192 break; 1193 } 1194 get += 2; 1195 if (get >= end) 1196 get = sc->sc_rbuf; 1197 cc--; 1198 } 1199 1200 if (cc != scc) { 1201 sc->sc_rbget = get; 1202 s = splserial(); 1203 COM_LOCK(sc); 1204 1205 cc = sc->sc_rbavail += scc - cc; 1206 /* Buffers should be ok again, release possible block. */ 1207 if (cc >= 1) { 1208 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1209 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1210 SET(sc->sc_cr3, CR3_RIE); 1211 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1212 SACOM_CR3, sc->sc_cr3); 1213 } 1214 } 1215 COM_UNLOCK(sc); 1216 splx(s); 1217 } 1218 } 1219 1220 static inline void 1221 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1222 { 1223 1224 CLR(tp->t_state, TS_BUSY); 1225 if (ISSET(tp->t_state, TS_FLUSH)) 1226 CLR(tp->t_state, TS_FLUSH); 1227 else 1228 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1229 (*tp->t_linesw->l_start)(tp); 1230 } 1231 1232 static inline void 1233 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1234 { 1235 } 1236 1237 void 1238 sacomsoft(void *arg) 1239 { 1240 struct sacom_softc *sc = arg; 1241 struct tty *tp; 1242 1243 if (COM_ISALIVE(sc) == 0) 1244 return; 1245 1246 tp = sc->sc_tty; 1247 1248 if (sc->sc_rx_ready) { 1249 sc->sc_rx_ready = 0; 1250 sacom_rxsoft(sc, tp); 1251 } 1252 1253 if (sc->sc_st_check) { 1254 sc->sc_st_check = 0; 1255 sacom_stsoft(sc, tp); 1256 } 1257 1258 if (sc->sc_tx_done) { 1259 sc->sc_tx_done = 0; 1260 sacom_txsoft(sc, tp); 1261 } 1262 } 1263 1264 int 1265 sacomintr(void *arg) 1266 { 1267 struct sacom_softc *sc = arg; 1268 bus_space_tag_t iot = sc->sc_iot; 1269 bus_space_handle_t ioh = sc->sc_ioh; 1270 u_char *put, *end; 1271 u_int cc; 1272 u_int sr0, sr1; 1273 1274 if (COM_ISALIVE(sc) == 0) 1275 return 0; 1276 1277 COM_LOCK(sc); 1278 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1279 if (!sr0) { 1280 COM_UNLOCK(sc); 1281 return 0; 1282 } 1283 if (ISSET(sr0, SR0_EIF)) 1284 /* XXX silently discard error bits */ 1285 bus_space_read_4(iot, ioh, SACOM_DR); 1286 if (ISSET(sr0, SR0_RBB)) 1287 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1288 if (ISSET(sr0, SR0_REB)) { 1289 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1290 #if defined(DDB) || defined(KGDB) 1291 #ifndef DDB_BREAK_CHAR 1292 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1293 console_debugger(); 1294 } 1295 #endif 1296 #endif /* DDB || KGDB */ 1297 } 1298 1299 1300 end = sc->sc_ebuf; 1301 put = sc->sc_rbput; 1302 cc = sc->sc_rbavail; 1303 1304 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1305 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1306 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1307 while (cc > 0) { 1308 if (!ISSET(sr1, SR1_RNE)) { 1309 bus_space_write_4(iot, ioh, SACOM_SR0, 1310 SR0_RID); 1311 break; 1312 } 1313 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1314 put[1] = sr1; 1315 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1316 if (put[0] == DDB_BREAK_CHAR && 1317 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1318 console_debugger(); 1319 1320 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1321 continue; 1322 } 1323 #endif 1324 put += 2; 1325 if (put >= end) 1326 put = sc->sc_rbuf; 1327 cc--; 1328 1329 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1330 } 1331 1332 /* 1333 * Current string of incoming characters ended because 1334 * no more data was available or we ran out of space. 1335 * Schedule a receive event if any data was received. 1336 * If we're out of space, turn off receive interrupts. 1337 */ 1338 sc->sc_rbput = put; 1339 sc->sc_rbavail = cc; 1340 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1341 sc->sc_rx_ready = 1; 1342 1343 /* XXX do RX hardware flow control */ 1344 1345 /* 1346 * If we're out of space, disable receive interrupts 1347 * until the queue has drained a bit. 1348 */ 1349 if (!cc) { 1350 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1351 CLR(sc->sc_cr3, CR3_RIE); 1352 bus_space_write_4(iot, ioh, SACOM_CR3, 1353 sc->sc_cr3); 1354 } 1355 } else { 1356 #ifdef DIAGNOSTIC 1357 panic("sacomintr: we shouldn't reach here"); 1358 #endif 1359 CLR(sc->sc_cr3, CR3_RIE); 1360 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1361 } 1362 } 1363 1364 /* 1365 * Done handling any receive interrupts. See if data can be 1366 * transmitted as well. Schedule tx done event if no data left 1367 * and tty was marked busy. 1368 */ 1369 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1370 if (ISSET(sr0, SR0_TFS)) { 1371 /* 1372 * If we've delayed a parameter change, do it now, and restart 1373 * output. 1374 * XXX sacom_loadchannelregs() waits TX completion, 1375 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1376 */ 1377 if (sc->sc_heldchange) { 1378 sacom_loadchannelregs(sc); 1379 sc->sc_heldchange = 0; 1380 sc->sc_tbc = sc->sc_heldtbc; 1381 sc->sc_heldtbc = 0; 1382 } 1383 1384 /* Output the next chunk of the contiguous buffer, if any. */ 1385 if (sc->sc_tbc > 0) { 1386 sacom_filltx(sc); 1387 } else { 1388 /* Disable transmit completion interrupts if necessary. */ 1389 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1390 CLR(sc->sc_cr3, CR3_TIE); 1391 bus_space_write_4(iot, ioh, SACOM_CR3, 1392 sc->sc_cr3); 1393 } 1394 if (sc->sc_tx_busy) { 1395 sc->sc_tx_busy = 0; 1396 sc->sc_tx_done = 1; 1397 } 1398 } 1399 } 1400 COM_UNLOCK(sc); 1401 1402 /* Wake up the poller. */ 1403 softint_schedule(sc->sc_si); 1404 1405 #if NRND > 0 && defined(RND_COM) 1406 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1407 #endif 1408 return 1; 1409 } 1410 1411 static void 1412 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1413 1414 /* XXX this should be done at sc->enable function */ 1415 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1416 SAGPIO_PCR, 0xa0000); 1417 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1418 SAGPIO_PSR, 0x100); 1419 } 1420 1421 /* Initialization for serial console */ 1422 int 1423 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1424 bus_space_handle_t *iohp) 1425 { 1426 int brd, cr0; 1427 1428 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1429 aprint_normal("register map failed\n"); 1430 1431 /* wait for the Tx queue to drain and disable the UART */ 1432 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1433 continue; 1434 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1435 1436 cr0 = cflag2cr0(cflag); 1437 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1438 1439 brd = SACOMSPEED(baud); 1440 sacomconsrate = baud; 1441 sacomconsaddr = iobase; 1442 sacomconscflag = cflag; 1443 /* XXX assumes little endian */ 1444 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1445 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1446 1447 /* enable the UART */ 1448 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1449 1450 return 0; 1451 } 1452 1453 void 1454 sacomcnprobe(struct consdev *cp) 1455 { 1456 cp->cn_pri = CN_REMOTE; 1457 } 1458 1459 void 1460 sacomcninit(struct consdev *cp) 1461 { 1462 if (cp == NULL) { 1463 /* XXX cp == NULL means that MMU is disabled. */ 1464 sacomconsioh = SACOM3_BASE; 1465 sacomconstag = &sa11x0_bs_tag; 1466 cn_tab = &sacomcons; 1467 return; 1468 } 1469 1470 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1471 CONMODE, &sacomconsioh)) 1472 panic("can't init serial console @%x", CONADDR); 1473 cn_tab = &sacomcons; 1474 sacomconstag = &sa11x0_bs_tag; 1475 } 1476 1477 int 1478 sacomcngetc(dev_t dev) 1479 { 1480 int c, s; 1481 1482 s = spltty(); /* XXX do we need this? */ 1483 1484 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1485 & SR1_RNE)) { 1486 #if defined(DDB) || defined(KGDB) 1487 #ifndef DDB_BREAK_CHAR 1488 u_int sr0; 1489 extern int db_active; 1490 1491 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1492 if (ISSET(sr0, SR0_RBB)) 1493 bus_space_write_4(sacomconstag, sacomconsioh, 1494 SACOM_SR0, SR0_RBB); 1495 if (ISSET(sr0, SR0_REB)) { 1496 bus_space_write_4(sacomconstag, sacomconsioh, 1497 SACOM_SR0, SR0_REB); 1498 if (db_active == 0) 1499 console_debugger(); 1500 } 1501 #endif 1502 #endif /* DDB || KGDB */ 1503 } 1504 1505 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1506 c &= 0xff; 1507 splx(s); 1508 1509 return c; 1510 } 1511 1512 void 1513 sacomcnputc(dev_t dev, int c) 1514 { 1515 int s; 1516 1517 s = spltty(); /* XXX do we need this? */ 1518 1519 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1520 & SR1_TNF)) 1521 continue; 1522 1523 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1524 splx(s); 1525 } 1526 1527 void 1528 sacomcnpollc(dev_t dev, int on) 1529 { 1530 1531 } 1532 1533 #if 0 1534 #ifdef DEBUG 1535 int 1536 sacomcncharpoll(void) 1537 { 1538 int c; 1539 1540 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1541 & SR1_RNE)) 1542 return -1; 1543 1544 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1545 c &= 0xff; 1546 1547 return c; 1548 } 1549 #endif 1550 #endif 1551 1552 /* helper function to identify the com ports used by 1553 console or KGDB (and not yet autoconf attached) */ 1554 int 1555 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1556 bus_space_handle_t *ioh) 1557 { 1558 bus_space_handle_t help; 1559 1560 if (!sacomconsattached && 1561 iot == sacomconstag && iobase == sacomconsaddr) 1562 help = sacomconsioh; 1563 else 1564 return 0; 1565 1566 if (ioh) 1567 *ioh = help; 1568 return 1; 1569 } 1570
Indexes created Thu Oct 30 16:09:53 GMT 2025