1 /* $NetBSD: sa11x0_com.c,v 1.59 2022/10/26 23:38:07 riastradh 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 1.59 2022/10/26 23:38:07 riastradh Exp $"); 68 69 #include "opt_com.h" 70 #include "opt_console.h" 71 #include "opt_ddb.h" 72 #include "opt_ddbparam.h" 73 #include "opt_kgdb.h" 74 #include "opt_multiprocessor.h" 75 #include "opt_lockdebug.h" 76 77 #ifdef RND_COM 78 #include <sys/rndsource.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/kmem.h> 89 #include <sys/tty.h> 90 #include <sys/uio.h> 91 #include <sys/vnode.h> 92 #include <sys/kauth.h> 93 94 #include <ddb/db_active.h> 95 96 #include <dev/cons.h> 97 98 #include <sys/bus.h> 99 #include <arm/sa11x0/sa11x0_reg.h> 100 #include <arm/sa11x0/sa11x0_var.h> 101 #include <arm/sa11x0/sa11x0_comreg.h> 102 #include <arm/sa11x0/sa11x0_comvar.h> 103 #include <arm/sa11x0/sa11x0_gpioreg.h> 104 105 #ifdef hpcarm 106 #include <hpc/include/platid.h> 107 #include <hpc/include/platid_mask.h> 108 #endif 109 110 #include "sacom.h" 111 112 dev_type_open(sacomopen); 113 dev_type_close(sacomclose); 114 dev_type_read(sacomread); 115 dev_type_write(sacomwrite); 116 dev_type_ioctl(sacomioctl); 117 dev_type_stop(sacomstop); 118 dev_type_tty(sacomtty); 119 dev_type_poll(sacompoll); 120 121 const struct cdevsw sacom_cdevsw = { 122 .d_open = sacomopen, 123 .d_close = sacomclose, 124 .d_read = sacomread, 125 .d_write = sacomwrite, 126 .d_ioctl = sacomioctl, 127 .d_stop = sacomstop, 128 .d_tty = sacomtty, 129 .d_poll = sacompoll, 130 .d_mmap = nommap, 131 .d_kqfilter = ttykqfilter, 132 .d_discard = nodiscard, 133 .d_flag = D_TTY 134 }; 135 136 static int sacom_match(device_t, cfdata_t, void *); 137 static void sacom_attach(device_t, device_t, void *); 138 static void sacom_filltx(struct sacom_softc *); 139 static void sacom_attach_subr(struct sacom_softc *); 140 #if defined(DDB) || defined(KGDB) 141 static void sacom_enable_debugport(struct sacom_softc *); 142 #endif 143 int sacom_detach(device_t, int); 144 void sacom_config(struct sacom_softc *); 145 int sacom_activate(device_t, enum devact); 146 void sacom_shutdown(struct sacom_softc *); 147 static u_int cflag2cr0(tcflag_t); 148 int sacomparam(struct tty *, struct termios *); 149 void sacomstart(struct tty *); 150 int sacomhwiflow(struct tty *, int); 151 152 void sacom_loadchannelregs(struct sacom_softc *); 153 void sacom_hwiflow(struct sacom_softc *); 154 void sacom_break(struct sacom_softc *, int); 155 void sacom_modem(struct sacom_softc *, int); 156 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 157 int sacom_to_tiocm(struct sacom_softc *); 158 void sacom_iflush(struct sacom_softc *); 159 160 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 161 bus_space_handle_t *); 162 int sacom_is_console(bus_space_tag_t, bus_addr_t, 163 bus_space_handle_t *); 164 165 void sacomsoft(void *); 166 167 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 168 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 169 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 170 static inline void sacom_schedrx(struct sacom_softc *); 171 172 #ifdef hpcarm 173 /* HPCARM specific functions */ 174 static void sacom_j720_init(device_t, device_t); 175 #endif 176 177 #define COMDIALOUT_MASK TTDIALOUT_MASK 178 179 #define COMUNIT(x) TTUNIT(x) 180 #define COMDIALOUT(x) TTDIALOUT(x) 181 182 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 183 device_is_active((sc)->sc_dev)) 184 185 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 186 #define COM_LOCK(sc) 187 #define COM_UNLOCK(sc) 188 189 int sacomintr(void *); 190 int sacomcngetc(dev_t); 191 void sacomcnputc(dev_t, int); 192 void sacomcnpollc(dev_t, int); 193 194 void sacomcnprobe(struct consdev *); 195 void sacomcninit(struct consdev *); 196 197 extern struct bus_space sa11x0_bs_tag; 198 199 static bus_space_tag_t sacomconstag; 200 static bus_space_handle_t sacomconsioh; 201 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 202 203 static int sacomconsattached; 204 static int sacomconsrate; 205 static tcflag_t sacomconscflag; 206 207 CFATTACH_DECL_NEW(sacom, sizeof(struct sacom_softc), 208 sacom_match, sacom_attach, NULL, NULL); 209 extern struct cfdriver sacom_cd; 210 211 #ifdef hpcarm 212 struct platid_data sacom_platid_table[] = { 213 { &platid_mask_MACH_HP_JORNADA_7XX, sacom_j720_init }, 214 { NULL, NULL } 215 }; 216 #endif 217 218 struct consdev sacomcons = { 219 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 220 NULL, NULL, NODEV, CN_NORMAL 221 }; 222 223 #ifndef CONMODE 224 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 225 #endif 226 #ifndef CONSPEED 227 #define CONSPEED 9600 228 #endif 229 #ifndef CONADDR 230 #define CONADDR SACOM3_BASE 231 #endif 232 233 static int 234 sacom_match(device_t parent, cfdata_t match, void *aux) 235 { 236 237 return 1; 238 } 239 240 void 241 sacom_attach(device_t parent, device_t self, void *aux) 242 { 243 struct sacom_softc *sc = device_private(self); 244 struct sa11x0_attach_args *sa = aux; 245 246 #ifdef hpcarm 247 struct platid_data *p; 248 void (*mdinit)(device_t, device_t); 249 #endif 250 251 aprint_normal("\n"); 252 253 sc->sc_dev = self; 254 sc->sc_iot = sa->sa_iot; 255 sc->sc_baseaddr = sa->sa_addr; 256 257 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 258 &sc->sc_ioh)) { 259 aprint_normal_dev(self, "unable to map registers\n"); 260 return; 261 } 262 263 switch (sc->sc_baseaddr) { 264 case SACOM1_BASE: 265 aprint_normal_dev(self, "SA-11x0 UART1\n"); 266 break; 267 case SACOM2_BASE: 268 aprint_normal_dev(self, "SA-11x0 UART2 (IRDA)\n"); 269 break; 270 case SACOM3_BASE: 271 aprint_normal_dev(self, "SA-11x0 UART3\n"); 272 break; 273 default: 274 aprint_normal_dev(self, "unknown SA-11x0 UART\n"); 275 break; 276 } 277 278 sacom_attach_subr(sc); 279 280 #ifdef hpcarm 281 /* Do hpcarm specific initialization, if any */ 282 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 283 mdinit = p->data; 284 (*mdinit)(parent, self); 285 } 286 #endif 287 288 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 289 } 290 291 void 292 sacom_attach_subr(struct sacom_softc *sc) 293 { 294 bus_addr_t iobase = sc->sc_baseaddr; 295 bus_space_tag_t iot = sc->sc_iot; 296 struct tty *tp; 297 298 /* XXX Do we need to disable interrupts here? */ 299 300 if (iot == sacomconstag && iobase == sacomconsaddr) { 301 sacomconsattached = 1; 302 sc->sc_speed = SACOMSPEED(sacomconsrate); 303 304 /* Make sure the console is always "hardwired". */ 305 delay(10000); /* wait for output to finish */ 306 SET(sc->sc_hwflags, COM_HW_CONSOLE); 307 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 308 } 309 310 tp = tty_alloc(); 311 tp->t_oproc = sacomstart; 312 tp->t_param = sacomparam; 313 tp->t_hwiflow = sacomhwiflow; 314 315 sc->sc_tty = tp; 316 sc->sc_rbuf = kmem_alloc(SACOM_RING_SIZE << 1, KM_SLEEP); 317 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 318 sc->sc_rbavail = SACOM_RING_SIZE; 319 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 320 sc->sc_tbc = 0; 321 322 tty_attach(tp); 323 324 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 325 int maj; 326 327 /* locate the major number */ 328 maj = cdevsw_lookup_major(&sacom_cdevsw); 329 330 cn_tab->cn_dev = makedev(maj, device_unit(sc->sc_dev)); 331 332 delay(10000); /* XXX */ 333 aprint_normal_dev(sc->sc_dev, "console\n"); 334 delay(10000); /* XXX */ 335 } 336 337 338 sc->sc_si = softint_establish(SOFTINT_SERIAL, sacomsoft, sc); 339 340 #ifdef RND_COM 341 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 342 RND_TYPE_TTY, RND_FLAG_COLLECT_TIME| 343 RND_FLAG_ESTIMATE_TIME); 344 #endif 345 346 /* if there are no enable/disable functions, assume the device 347 is always enabled */ 348 if (!sc->enable) 349 sc->enabled = 1; 350 351 sacom_config(sc); 352 353 SET(sc->sc_hwflags, COM_HW_DEV_OK); 354 } 355 356 /* This is necessary when dynamically changing SAIP configuration. */ 357 int 358 sacom_detach(device_t dev, int flags) 359 { 360 struct sacom_softc *sc = device_private(dev); 361 int maj, mn; 362 363 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) 364 return EBUSY; 365 366 if (sc->disable != NULL && sc->enabled != 0) { 367 (*sc->disable)(sc); 368 sc->enabled = 0; 369 } 370 371 /* locate the major number */ 372 maj = cdevsw_lookup_major(&sacom_cdevsw); 373 374 /* Nuke the vnodes for any open instances. */ 375 mn = device_unit(dev); 376 vdevgone(maj, mn, mn, VCHR); 377 378 mn |= COMDIALOUT_MASK; 379 vdevgone(maj, mn, mn, VCHR); 380 381 /* Free the receive buffer. */ 382 kmem_free(sc->sc_rbuf, SACOM_RING_SIZE << 1); 383 384 /* Detach and free the tty. */ 385 tty_detach(sc->sc_tty); 386 tty_free(sc->sc_tty); 387 388 /* Unhook the soft interrupt handler. */ 389 softint_disestablish(sc->sc_si); 390 391 #ifdef RND_COM 392 /* Unhook the entropy source. */ 393 rnd_detach_source(&sc->rnd_source); 394 #endif 395 396 return 0; 397 } 398 399 void 400 sacom_config(struct sacom_softc *sc) 401 { 402 bus_space_tag_t iot = sc->sc_iot; 403 bus_space_handle_t ioh = sc->sc_ioh; 404 405 /* Disable engine before configuring the device. */ 406 sc->sc_cr3 = 0; 407 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 408 409 #ifdef DDB 410 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 411 sacom_enable_debugport(sc); 412 #endif 413 } 414 415 #ifdef DDB 416 static void 417 sacom_enable_debugport(struct sacom_softc *sc) 418 { 419 bus_space_tag_t iot = sc->sc_iot; 420 bus_space_handle_t ioh = sc->sc_ioh; 421 int s; 422 423 s = splserial(); 424 COM_LOCK(sc); 425 sc->sc_cr3 = CR3_RXE | CR3_TXE; 426 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 427 COM_UNLOCK(sc); 428 splx(s); 429 } 430 #endif 431 432 int 433 sacom_activate(device_t dev, enum devact act) 434 { 435 struct sacom_softc *sc = device_private(dev); 436 437 switch (act) { 438 case DVACT_DEACTIVATE: 439 sc->enabled = 0; 440 return 0; 441 default: 442 return EOPNOTSUPP; 443 } 444 } 445 446 void 447 sacom_shutdown(struct sacom_softc *sc) 448 { 449 struct tty *tp = sc->sc_tty; 450 int s; 451 452 s = splserial(); 453 COM_LOCK(sc); 454 455 /* Clear any break condition set with TIOCSBRK. */ 456 sacom_break(sc, 0); 457 458 /* 459 * Hang up if necessary. Wait a bit, so the other side has time to 460 * notice even if we immediately open the port again. 461 * Avoid tsleeping above splhigh(). 462 */ 463 if (ISSET(tp->t_cflag, HUPCL)) { 464 sacom_modem(sc, 0); 465 COM_UNLOCK(sc); 466 splx(s); 467 /* XXX tsleep will only timeout */ 468 (void) tsleep(sc, TTIPRI, ttclos, hz); 469 s = splserial(); 470 COM_LOCK(sc); 471 } 472 473 /* Turn off interrupts. */ 474 sc->sc_cr3 = 0; 475 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 476 477 if (sc->disable) { 478 #ifdef DIAGNOSTIC 479 if (!sc->enabled) 480 panic("sacom_shutdown: not enabled?"); 481 #endif 482 (*sc->disable)(sc); 483 sc->enabled = 0; 484 } 485 COM_UNLOCK(sc); 486 splx(s); 487 } 488 489 int 490 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 491 { 492 struct sacom_softc *sc; 493 struct tty *tp; 494 int s, s2; 495 int error; 496 497 sc = device_lookup_private(&sacom_cd, COMUNIT(dev)); 498 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 499 sc->sc_rbuf == NULL) 500 return ENXIO; 501 502 if (!device_is_active(sc->sc_dev)) 503 return ENXIO; 504 505 tp = sc->sc_tty; 506 507 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 508 return (EBUSY); 509 510 s = spltty(); 511 512 /* 513 * Do the following iff this is a first open. 514 */ 515 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 516 struct termios t; 517 518 tp->t_dev = dev; 519 520 s2 = splserial(); 521 COM_LOCK(sc); 522 523 if (sc->enable) { 524 if ((*sc->enable)(sc)) { 525 COM_UNLOCK(sc); 526 splx(s2); 527 splx(s); 528 aprint_normal_dev(sc->sc_dev, "device enable failed\n"); 529 return EIO; 530 } 531 sc->enabled = 1; 532 sacom_config(sc); 533 } 534 535 /* Turn on interrupts. */ 536 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 537 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 538 sc->sc_cr3); 539 540 541 COM_UNLOCK(sc); 542 splx(s2); 543 544 /* 545 * Initialize the termios status to the defaults. Add in the 546 * sticky bits from TIOCSFLAGS. 547 */ 548 t.c_ispeed = 0; 549 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 550 t.c_ospeed = sacomconsrate; 551 t.c_cflag = sacomconscflag; 552 } else { 553 t.c_ospeed = TTYDEF_SPEED; 554 t.c_cflag = TTYDEF_CFLAG; 555 } 556 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 557 SET(t.c_cflag, CLOCAL); 558 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 559 SET(t.c_cflag, CRTSCTS); 560 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 561 SET(t.c_cflag, MDMBUF); 562 /* Make sure sacomparam() will do something. */ 563 tp->t_ospeed = 0; 564 (void) sacomparam(tp, &t); 565 tp->t_iflag = TTYDEF_IFLAG; 566 tp->t_oflag = TTYDEF_OFLAG; 567 tp->t_lflag = TTYDEF_LFLAG; 568 ttychars(tp); 569 ttsetwater(tp); 570 571 s2 = splserial(); 572 COM_LOCK(sc); 573 574 /* 575 * Turn on DTR. We must always do this, even if carrier is not 576 * present, because otherwise we'd have to use TIOCSDTR 577 * immediately after setting CLOCAL, which applications do not 578 * expect. We always assert DTR while the device is open 579 * unless explicitly requested to deassert it. 580 */ 581 sacom_modem(sc, 1); 582 583 /* Clear the input ring, and unblock. */ 584 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 585 sc->sc_rbavail = SACOM_RING_SIZE; 586 sacom_iflush(sc); 587 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 588 sacom_hwiflow(sc); 589 590 #ifdef COM_DEBUG 591 if (sacom_debug) 592 comstatus(sc, "sacomopen "); 593 #endif 594 595 COM_UNLOCK(sc); 596 splx(s2); 597 } 598 599 splx(s); 600 601 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 602 if (error) 603 goto bad; 604 605 error = (*tp->t_linesw->l_open)(dev, tp); 606 if (error) 607 goto bad; 608 609 return 0; 610 611 bad: 612 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 613 /* 614 * We failed to open the device, and nobody else had it opened. 615 * Clean up the state as appropriate. 616 */ 617 sacom_shutdown(sc); 618 } 619 620 return error; 621 } 622 623 int 624 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 625 { 626 struct sacom_softc *sc = 627 device_lookup_private(&sacom_cd, COMUNIT(dev)); 628 struct tty *tp = sc->sc_tty; 629 630 /* XXX This is for cons.c. */ 631 if (!ISSET(tp->t_state, TS_ISOPEN)) 632 return 0; 633 634 (*tp->t_linesw->l_close)(tp, flag); 635 ttyclose(tp); 636 637 if (COM_ISALIVE(sc) == 0) 638 return 0; 639 640 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 641 /* 642 * Although we got a last close, the device may still be in 643 * use; e.g. if this was the dialout node, and there are still 644 * processes waiting for carrier on the non-dialout node. 645 */ 646 sacom_shutdown(sc); 647 } 648 649 return 0; 650 } 651 652 int 653 sacomread(dev_t dev, struct uio *uio, int flag) 654 { 655 struct sacom_softc *sc = 656 device_lookup_private(&sacom_cd, COMUNIT(dev)); 657 struct tty *tp = sc->sc_tty; 658 659 if (COM_ISALIVE(sc) == 0) 660 return EIO; 661 662 return (*tp->t_linesw->l_read)(tp, uio, flag); 663 } 664 665 int 666 sacomwrite(dev_t dev, struct uio *uio, int flag) 667 { 668 struct sacom_softc *sc = 669 device_lookup_private(&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 = 682 device_lookup_private(&sacom_cd, COMUNIT(dev)); 683 struct tty *tp = sc->sc_tty; 684 685 if (COM_ISALIVE(sc) == 0) 686 return EIO; 687 688 return (*tp->t_linesw->l_poll)(tp, events, l); 689 } 690 691 struct tty * 692 sacomtty(dev_t dev) 693 { 694 struct sacom_softc *sc = 695 device_lookup_private(&sacom_cd, COMUNIT(dev)); 696 struct tty *tp = sc->sc_tty; 697 698 return tp; 699 } 700 701 int 702 sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 703 { 704 struct sacom_softc *sc = 705 device_lookup_private(&sacom_cd, COMUNIT(dev)); 706 struct tty *tp = sc->sc_tty; 707 int error; 708 int s; 709 710 if (COM_ISALIVE(sc) == 0) 711 return EIO; 712 713 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 714 if (error != EPASSTHROUGH) 715 return error; 716 717 error = ttioctl(tp, cmd, data, flag, l); 718 if (error != EPASSTHROUGH) 719 return error; 720 721 error = 0; 722 723 s = splserial(); 724 COM_LOCK(sc); 725 726 switch (cmd) { 727 case TIOCSBRK: 728 sacom_break(sc, 1); 729 break; 730 731 case TIOCCBRK: 732 sacom_break(sc, 0); 733 break; 734 735 case TIOCSDTR: 736 sacom_modem(sc, 1); 737 break; 738 739 case TIOCCDTR: 740 sacom_modem(sc, 0); 741 break; 742 743 case TIOCGFLAGS: 744 *(int *)data = sc->sc_swflags; 745 break; 746 747 case TIOCSFLAGS: 748 error = kauth_authorize_device_tty(l->l_cred, 749 KAUTH_DEVICE_TTY_PRIVSET, tp); 750 if (error) 751 break; 752 sc->sc_swflags = *(int *)data; 753 break; 754 755 case TIOCMSET: 756 case TIOCMBIS: 757 case TIOCMBIC: 758 tiocm_to_sacom(sc, cmd, *(int *)data); 759 break; 760 761 case TIOCMGET: 762 *(int *)data = sacom_to_tiocm(sc); 763 break; 764 765 default: 766 error = EPASSTHROUGH; 767 break; 768 } 769 770 COM_UNLOCK(sc); 771 splx(s); 772 773 #ifdef COM_DEBUG 774 if (sacom_debug) 775 comstatus(sc, "comioctl "); 776 #endif 777 778 return error; 779 } 780 781 static inline void 782 sacom_schedrx(struct sacom_softc *sc) 783 { 784 785 sc->sc_rx_ready = 1; 786 787 /* Wake up the poller. */ 788 softint_schedule(sc->sc_si); 789 } 790 791 void 792 sacom_break(struct sacom_softc *sc, int onoff) 793 { 794 795 if (onoff) 796 SET(sc->sc_cr3, CR3_BRK); 797 else 798 CLR(sc->sc_cr3, CR3_BRK); 799 800 if (!sc->sc_heldchange) { 801 if (sc->sc_tx_busy) { 802 sc->sc_heldtbc = sc->sc_tbc; 803 sc->sc_tbc = 0; 804 sc->sc_heldchange = 1; 805 } else 806 sacom_loadchannelregs(sc); 807 } 808 } 809 810 void 811 sacom_modem(struct sacom_softc *sc, int onoff) 812 { 813 if (!sc->sc_heldchange) { 814 if (sc->sc_tx_busy) { 815 sc->sc_heldtbc = sc->sc_tbc; 816 sc->sc_tbc = 0; 817 sc->sc_heldchange = 1; 818 } else 819 sacom_loadchannelregs(sc); 820 } 821 } 822 823 void 824 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 825 { 826 } 827 828 int 829 sacom_to_tiocm(struct sacom_softc *sc) 830 { 831 int ttybits = 0; 832 833 if (sc->sc_cr3 != 0) 834 SET(ttybits, TIOCM_LE); 835 836 return ttybits; 837 } 838 839 static u_int 840 cflag2cr0(tcflag_t cflag) 841 { 842 u_int cr0; 843 844 cr0 = (cflag & PARENB) ? CR0_PE : 0; 845 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 846 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 847 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 848 849 return cr0; 850 } 851 852 int 853 sacomparam(struct tty *tp, struct termios *t) 854 { 855 struct sacom_softc *sc = 856 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 857 int ospeed = SACOMSPEED(t->c_ospeed); 858 u_int cr0; 859 int s; 860 861 if (COM_ISALIVE(sc) == 0) 862 return EIO; 863 864 /* Check requested parameters. */ 865 if (ospeed < 0) 866 return EINVAL; 867 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 868 return EINVAL; 869 870 /* 871 * For the console, always force CLOCAL and !HUPCL, so that the port 872 * is always active. 873 */ 874 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 875 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 876 SET(t->c_cflag, CLOCAL); 877 CLR(t->c_cflag, HUPCL); 878 } 879 880 /* 881 * If there were no changes, don't do anything. This avoids dropping 882 * input and improves performance when all we did was frob things like 883 * VMIN and VTIME. 884 */ 885 if (tp->t_ospeed == t->c_ospeed && 886 tp->t_cflag == t->c_cflag) 887 return 0; 888 889 cr0 = cflag2cr0(t->c_cflag); 890 891 s = splserial(); 892 COM_LOCK(sc); 893 894 sc->sc_cr0 = cr0; 895 896 sc->sc_speed = ospeed; 897 898 /* And copy to tty. */ 899 tp->t_ispeed = 0; 900 tp->t_ospeed = t->c_ospeed; 901 tp->t_cflag = t->c_cflag; 902 903 if (!sc->sc_heldchange) { 904 if (sc->sc_tx_busy) { 905 sc->sc_heldtbc = sc->sc_tbc; 906 sc->sc_tbc = 0; 907 sc->sc_heldchange = 1; 908 } else 909 sacom_loadchannelregs(sc); 910 } 911 912 if (!ISSET(t->c_cflag, CHWFLOW)) { 913 /* Disable the high water mark. */ 914 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 915 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 916 sacom_schedrx(sc); 917 } 918 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 919 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 920 sacom_hwiflow(sc); 921 } 922 } 923 924 COM_UNLOCK(sc); 925 splx(s); 926 927 (void) (*tp->t_linesw->l_modem)(tp, 1); 928 929 #ifdef COM_DEBUG 930 if (sacom_debug) 931 comstatus(sc, "comparam "); 932 #endif 933 934 return 0; 935 } 936 937 void 938 sacom_iflush(struct sacom_softc *sc) 939 { 940 bus_space_tag_t iot = sc->sc_iot; 941 bus_space_handle_t ioh = sc->sc_ioh; 942 #ifdef DIAGNOSTIC 943 int reg; 944 #endif 945 int timo; 946 947 #ifdef DIAGNOSTIC 948 reg = 0xffff; 949 #endif 950 timo = 50; 951 /* flush any pending I/O */ 952 if (sc->sc_cr3 & CR3_RXE) { 953 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 954 && --timo) 955 #ifdef DIAGNOSTIC 956 reg = 957 #else 958 (void) 959 #endif 960 bus_space_read_4(iot, ioh, SACOM_DR); 961 } 962 #if 0 963 /* XXX is it good idea to wait TX finish? */ 964 if (sc->sc_cr3 & CR3_TXE) { 965 timo = 500; 966 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 967 && --timo) 968 delay(100); 969 } 970 #endif 971 #ifdef DIAGNOSTIC 972 if (!timo) 973 aprint_debug_dev(sc->sc_dev, "sacom_iflush timeout %02x\n", reg); 974 #endif 975 } 976 977 void 978 sacom_loadchannelregs(struct sacom_softc *sc) 979 { 980 bus_space_tag_t iot = sc->sc_iot; 981 bus_space_handle_t ioh = sc->sc_ioh; 982 983 /* XXXXX necessary? */ 984 sacom_iflush(sc); 985 986 /* Need to stop engines first. */ 987 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 988 989 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 990 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 991 992 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 993 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 994 } 995 996 int 997 sacomhwiflow(struct tty *tp, int block) 998 { 999 #if 0 1000 struct sacom_softc *sc = 1001 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1002 int s; 1003 1004 if (COM_ISALIVE(sc) == 0) 1005 return 0; 1006 1007 if (sc->sc_mcr_rts == 0) 1008 return 0; 1009 1010 s = splserial(); 1011 COM_LOCK(sc); 1012 1013 if (block) { 1014 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1015 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1016 sacom_hwiflow(sc); 1017 } 1018 } else { 1019 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1020 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1021 sacom_schedrx(sc); 1022 } 1023 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1024 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1025 sacom_hwiflow(sc); 1026 } 1027 } 1028 1029 COM_UNLOCK(sc); 1030 splx(s); 1031 #endif 1032 return 1; 1033 } 1034 1035 /* 1036 * (un)block input via hw flowcontrol 1037 */ 1038 void 1039 sacom_hwiflow(struct sacom_softc *sc) 1040 { 1041 #if 0 1042 bus_space_tag_t iot = sc->sc_iot; 1043 bus_space_handle_t ioh = sc->sc_ioh; 1044 1045 /* XXX implement */ 1046 #endif 1047 } 1048 1049 1050 void 1051 sacomstart(struct tty *tp) 1052 { 1053 struct sacom_softc *sc = 1054 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1055 bus_space_tag_t iot = sc->sc_iot; 1056 bus_space_handle_t ioh = sc->sc_ioh; 1057 int s; 1058 1059 if (COM_ISALIVE(sc) == 0) 1060 return; 1061 1062 s = spltty(); 1063 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1064 goto out; 1065 if (!ttypull(tp)) 1066 goto out; 1067 1068 /* Grab the first contiguous region of buffer space. */ 1069 { 1070 u_char *tba; 1071 int tbc; 1072 1073 tba = tp->t_outq.c_cf; 1074 tbc = ndqb(&tp->t_outq, 0); 1075 1076 (void)splserial(); 1077 COM_LOCK(sc); 1078 1079 sc->sc_tba = tba; 1080 sc->sc_tbc = tbc; 1081 } 1082 1083 SET(tp->t_state, TS_BUSY); 1084 sc->sc_tx_busy = 1; 1085 1086 /* Enable transmit completion interrupts if necessary. */ 1087 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1088 SET(sc->sc_cr3, CR3_TIE); 1089 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1090 } 1091 1092 /* Output the first chunk of the contiguous buffer. */ 1093 sacom_filltx(sc); 1094 1095 COM_UNLOCK(sc); 1096 out: 1097 splx(s); 1098 return; 1099 } 1100 1101 void 1102 sacom_filltx(struct sacom_softc *sc) 1103 { 1104 bus_space_tag_t iot = sc->sc_iot; 1105 bus_space_handle_t ioh = sc->sc_ioh; 1106 int c, n; 1107 1108 n = 0; 1109 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1110 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1111 break; 1112 c = *(sc->sc_tba + n); 1113 c &= 0xff; 1114 bus_space_write_4(iot, ioh, SACOM_DR, c); 1115 n++; 1116 } 1117 sc->sc_tbc -= n; 1118 sc->sc_tba += n; 1119 } 1120 1121 /* 1122 * Stop output on a line. 1123 */ 1124 void 1125 sacomstop(struct tty *tp, int flag) 1126 { 1127 struct sacom_softc *sc = 1128 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1129 int s; 1130 1131 s = splserial(); 1132 COM_LOCK(sc); 1133 if (ISSET(tp->t_state, TS_BUSY)) { 1134 /* Stop transmitting at the next chunk. */ 1135 sc->sc_tbc = 0; 1136 sc->sc_heldtbc = 0; 1137 if (!ISSET(tp->t_state, TS_TTSTOP)) 1138 SET(tp->t_state, TS_FLUSH); 1139 } 1140 COM_UNLOCK(sc); 1141 splx(s); 1142 } 1143 1144 static inline void 1145 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1146 { 1147 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1148 u_char *get, *end; 1149 u_int cc, scc; 1150 u_char sr1; 1151 int code; 1152 int s; 1153 1154 end = sc->sc_ebuf; 1155 get = sc->sc_rbget; 1156 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1157 1158 while (cc) { 1159 code = get[0]; 1160 sr1 = get[1]; 1161 if (ISSET(sr1, SR1_FRE)) 1162 SET(code, TTY_FE); 1163 if (ISSET(sr1, SR1_PRE)) 1164 SET(code, TTY_PE); 1165 if ((*rint)(code, tp) == -1) { 1166 /* 1167 * The line discipline's buffer is out of space. 1168 */ 1169 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1170 /* 1171 * We're either not using flow control, or the 1172 * line discipline didn't tell us to block for 1173 * some reason. Either way, we have no way to 1174 * know when there's more space available, so 1175 * just drop the rest of the data. 1176 */ 1177 get += cc << 1; 1178 if (get >= end) 1179 get -= SACOM_RING_SIZE << 1; 1180 cc = 0; 1181 } else { 1182 /* 1183 * Don't schedule any more receive processing 1184 * until the line discipline tells us there's 1185 * space available (through comhwiflow()). 1186 * Leave the rest of the data in the input 1187 * buffer. 1188 */ 1189 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1190 } 1191 break; 1192 } 1193 get += 2; 1194 if (get >= end) 1195 get = sc->sc_rbuf; 1196 cc--; 1197 } 1198 1199 if (cc != scc) { 1200 sc->sc_rbget = get; 1201 s = splserial(); 1202 COM_LOCK(sc); 1203 1204 cc = sc->sc_rbavail += scc - cc; 1205 /* Buffers should be ok again, release possible block. */ 1206 if (cc >= 1) { 1207 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1208 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1209 SET(sc->sc_cr3, CR3_RIE); 1210 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1211 SACOM_CR3, sc->sc_cr3); 1212 } 1213 } 1214 COM_UNLOCK(sc); 1215 splx(s); 1216 } 1217 } 1218 1219 static inline void 1220 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1221 { 1222 1223 CLR(tp->t_state, TS_BUSY); 1224 if (ISSET(tp->t_state, TS_FLUSH)) 1225 CLR(tp->t_state, TS_FLUSH); 1226 else 1227 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1228 (*tp->t_linesw->l_start)(tp); 1229 } 1230 1231 static inline void 1232 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1233 { 1234 } 1235 1236 void 1237 sacomsoft(void *arg) 1238 { 1239 struct sacom_softc *sc = arg; 1240 struct tty *tp; 1241 1242 if (COM_ISALIVE(sc) == 0) 1243 return; 1244 1245 tp = sc->sc_tty; 1246 1247 if (sc->sc_rx_ready) { 1248 sc->sc_rx_ready = 0; 1249 sacom_rxsoft(sc, tp); 1250 } 1251 1252 if (sc->sc_st_check) { 1253 sc->sc_st_check = 0; 1254 sacom_stsoft(sc, tp); 1255 } 1256 1257 if (sc->sc_tx_done) { 1258 sc->sc_tx_done = 0; 1259 sacom_txsoft(sc, tp); 1260 } 1261 } 1262 1263 int 1264 sacomintr(void *arg) 1265 { 1266 struct sacom_softc *sc = arg; 1267 bus_space_tag_t iot = sc->sc_iot; 1268 bus_space_handle_t ioh = sc->sc_ioh; 1269 u_char *put, *end; 1270 u_int cc; 1271 u_int sr0, sr1; 1272 1273 if (COM_ISALIVE(sc) == 0) 1274 return 0; 1275 1276 COM_LOCK(sc); 1277 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1278 if (!sr0) { 1279 COM_UNLOCK(sc); 1280 return 0; 1281 } 1282 if (ISSET(sr0, SR0_EIF)) 1283 /* XXX silently discard error bits */ 1284 bus_space_read_4(iot, ioh, SACOM_DR); 1285 if (ISSET(sr0, SR0_RBB)) 1286 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1287 if (ISSET(sr0, SR0_REB)) { 1288 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1289 #if defined(DDB) || defined(KGDB) 1290 #ifndef DDB_BREAK_CHAR 1291 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1292 console_debugger(); 1293 } 1294 #endif 1295 #endif /* DDB || KGDB */ 1296 } 1297 1298 1299 end = sc->sc_ebuf; 1300 put = sc->sc_rbput; 1301 cc = sc->sc_rbavail; 1302 1303 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1304 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1305 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1306 while (cc > 0) { 1307 if (!ISSET(sr1, SR1_RNE)) { 1308 bus_space_write_4(iot, ioh, SACOM_SR0, 1309 SR0_RID); 1310 break; 1311 } 1312 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1313 put[1] = sr1; 1314 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1315 if (put[0] == DDB_BREAK_CHAR && 1316 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1317 console_debugger(); 1318 1319 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1320 continue; 1321 } 1322 #endif 1323 put += 2; 1324 if (put >= end) 1325 put = sc->sc_rbuf; 1326 cc--; 1327 1328 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1329 } 1330 1331 /* 1332 * Current string of incoming characters ended because 1333 * no more data was available or we ran out of space. 1334 * Schedule a receive event if any data was received. 1335 * If we're out of space, turn off receive interrupts. 1336 */ 1337 sc->sc_rbput = put; 1338 sc->sc_rbavail = cc; 1339 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1340 sc->sc_rx_ready = 1; 1341 1342 /* XXX do RX hardware flow control */ 1343 1344 /* 1345 * If we're out of space, disable receive interrupts 1346 * until the queue has drained a bit. 1347 */ 1348 if (!cc) { 1349 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1350 CLR(sc->sc_cr3, CR3_RIE); 1351 bus_space_write_4(iot, ioh, SACOM_CR3, 1352 sc->sc_cr3); 1353 } 1354 } else { 1355 #ifdef DIAGNOSTIC 1356 panic("sacomintr: we shouldn't reach here"); 1357 #endif 1358 CLR(sc->sc_cr3, CR3_RIE); 1359 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1360 } 1361 } 1362 1363 /* 1364 * Done handling any receive interrupts. See if data can be 1365 * transmitted as well. Schedule tx done event if no data left 1366 * and tty was marked busy. 1367 */ 1368 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1369 if (ISSET(sr0, SR0_TFS)) { 1370 /* 1371 * If we've delayed a parameter change, do it now, and restart 1372 * output. 1373 * XXX sacom_loadchannelregs() waits TX completion, 1374 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1375 */ 1376 if (sc->sc_heldchange) { 1377 sacom_loadchannelregs(sc); 1378 sc->sc_heldchange = 0; 1379 sc->sc_tbc = sc->sc_heldtbc; 1380 sc->sc_heldtbc = 0; 1381 } 1382 1383 /* Output the next chunk of the contiguous buffer, if any. */ 1384 if (sc->sc_tbc > 0) { 1385 sacom_filltx(sc); 1386 } else { 1387 /* Disable transmit completion interrupts if necessary. */ 1388 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1389 CLR(sc->sc_cr3, CR3_TIE); 1390 bus_space_write_4(iot, ioh, SACOM_CR3, 1391 sc->sc_cr3); 1392 } 1393 if (sc->sc_tx_busy) { 1394 sc->sc_tx_busy = 0; 1395 sc->sc_tx_done = 1; 1396 } 1397 } 1398 } 1399 COM_UNLOCK(sc); 1400 1401 /* Wake up the poller. */ 1402 softint_schedule(sc->sc_si); 1403 1404 #ifdef RND_COM 1405 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1406 #endif 1407 return 1; 1408 } 1409 1410 static void 1411 sacom_j720_init(device_t parent, device_t self) 1412 { 1413 struct sa11x0_softc *sasc; 1414 1415 sasc = device_private(parent); 1416 1417 /* XXX this should be done at sc->enable function */ 1418 bus_space_write_4(sasc->sc_iot, sasc->sc_gpioh, 1419 SAGPIO_PCR, 0xa0000); 1420 bus_space_write_4(sasc->sc_iot, sasc->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 aprint_normal("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 1493 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1494 if (ISSET(sr0, SR0_RBB)) 1495 bus_space_write_4(sacomconstag, sacomconsioh, 1496 SACOM_SR0, SR0_RBB); 1497 if (ISSET(sr0, SR0_REB)) { 1498 bus_space_write_4(sacomconstag, sacomconsioh, 1499 SACOM_SR0, SR0_REB); 1500 if (db_active == 0) 1501 console_debugger(); 1502 } 1503 #endif 1504 #endif /* DDB || KGDB */ 1505 } 1506 1507 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1508 c &= 0xff; 1509 splx(s); 1510 1511 return c; 1512 } 1513 1514 void 1515 sacomcnputc(dev_t dev, int c) 1516 { 1517 int s; 1518 1519 s = spltty(); /* XXX do we need this? */ 1520 1521 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1522 & SR1_TNF)) 1523 continue; 1524 1525 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1526 splx(s); 1527 } 1528 1529 void 1530 sacomcnpollc(dev_t dev, int on) 1531 { 1532 1533 } 1534 1535 #if 0 1536 #ifdef DEBUG 1537 int 1538 sacomcncharpoll(void) 1539 { 1540 int c; 1541 1542 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1543 & SR1_RNE)) 1544 return -1; 1545 1546 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1547 c &= 0xff; 1548 1549 return c; 1550 } 1551 #endif 1552 #endif 1553 1554 /* helper function to identify the com ports used by 1555 console or KGDB (and not yet autoconf attached) */ 1556 int 1557 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1558 bus_space_handle_t *ioh) 1559 { 1560 bus_space_handle_t help; 1561 1562 if (!sacomconsattached && 1563 iot == sacomconstag && iobase == sacomconsaddr) 1564 help = sacomconsioh; 1565 else 1566 return 0; 1567 1568 if (ioh) 1569 *ioh = help; 1570 return 1; 1571 } 1572