sa11x0_com.c revision 1.52
1 /* $NetBSD: sa11x0_com.c,v 1.52 2014/07/25 08:10:32 dholland 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 1.52 2014/07/25 08:10:32 dholland 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 #ifdef 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 <sys/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 .d_open = sacomopen, 121 .d_close = sacomclose, 122 .d_read = sacomread, 123 .d_write = sacomwrite, 124 .d_ioctl = sacomioctl, 125 .d_stop = sacomstop, 126 .d_tty = sacomtty, 127 .d_poll = sacompoll, 128 .d_mmap = nommap, 129 .d_kqfilter = ttykqfilter, 130 .d_discard = nodiscard, 131 .d_flag = D_TTY 132 }; 133 134 static int sacom_match(device_t, cfdata_t, void *); 135 static void sacom_attach(device_t, device_t, void *); 136 static void sacom_filltx(struct sacom_softc *); 137 static void sacom_attach_subr(struct sacom_softc *); 138 #if defined(DDB) || defined(KGDB) 139 static void sacom_enable_debugport(struct sacom_softc *); 140 #endif 141 int sacom_detach(device_t, int); 142 void sacom_config(struct sacom_softc *); 143 int sacom_activate(device_t, enum devact); 144 void sacom_shutdown(struct sacom_softc *); 145 static u_int cflag2cr0(tcflag_t); 146 int sacomparam(struct tty *, struct termios *); 147 void sacomstart(struct tty *); 148 int sacomhwiflow(struct tty *, int); 149 150 void sacom_loadchannelregs(struct sacom_softc *); 151 void sacom_hwiflow(struct sacom_softc *); 152 void sacom_break(struct sacom_softc *, int); 153 void sacom_modem(struct sacom_softc *, int); 154 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 155 int sacom_to_tiocm(struct sacom_softc *); 156 void sacom_iflush(struct sacom_softc *); 157 158 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 159 bus_space_handle_t *); 160 int sacom_is_console(bus_space_tag_t, bus_addr_t, 161 bus_space_handle_t *); 162 163 void sacomsoft(void *); 164 165 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 166 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 167 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 168 static inline void sacom_schedrx(struct sacom_softc *); 169 170 #ifdef hpcarm 171 /* HPCARM specific functions */ 172 static void sacom_j720_init(device_t, device_t); 173 #endif 174 175 #define COMUNIT_MASK 0x7ffff 176 #define COMDIALOUT_MASK 0x80000 177 178 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 179 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 180 181 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 182 device_is_active((sc)->sc_dev)) 183 184 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 185 #define COM_LOCK(sc) 186 #define COM_UNLOCK(sc) 187 188 int sacomintr(void *); 189 int sacomcngetc(dev_t); 190 void sacomcnputc(dev_t, int); 191 void sacomcnpollc(dev_t, int); 192 193 void sacomcnprobe(struct consdev *); 194 void sacomcninit(struct consdev *); 195 196 extern struct bus_space sa11x0_bs_tag; 197 198 static bus_space_tag_t sacomconstag; 199 static bus_space_handle_t sacomconsioh; 200 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 201 202 static int sacomconsattached; 203 static int sacomconsrate; 204 static tcflag_t sacomconscflag; 205 206 CFATTACH_DECL_NEW(sacom, sizeof(struct sacom_softc), 207 sacom_match, sacom_attach, NULL, NULL); 208 extern struct cfdriver sacom_cd; 209 210 #ifdef hpcarm 211 struct platid_data sacom_platid_table[] = { 212 { &platid_mask_MACH_HP_JORNADA_7XX, sacom_j720_init }, 213 { NULL, NULL } 214 }; 215 #endif 216 217 struct consdev sacomcons = { 218 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 219 NULL, NULL, NODEV, CN_NORMAL 220 }; 221 222 #ifndef CONMODE 223 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 224 #endif 225 #ifndef CONSPEED 226 #define CONSPEED 9600 227 #endif 228 #ifndef CONADDR 229 #define CONADDR SACOM3_BASE 230 #endif 231 232 static int 233 sacom_match(device_t parent, cfdata_t match, void *aux) 234 { 235 236 return 1; 237 } 238 239 void 240 sacom_attach(device_t parent, device_t self, void *aux) 241 { 242 struct sacom_softc *sc = device_private(self); 243 struct sa11x0_attach_args *sa = aux; 244 245 #ifdef hpcarm 246 struct platid_data *p; 247 void (*mdinit)(device_t, device_t); 248 #endif 249 250 aprint_normal("\n"); 251 252 sc->sc_dev = self; 253 sc->sc_iot = sa->sa_iot; 254 sc->sc_baseaddr = sa->sa_addr; 255 256 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 257 &sc->sc_ioh)) { 258 aprint_normal_dev(self, "unable to map registers\n"); 259 return; 260 } 261 262 switch (sc->sc_baseaddr) { 263 case SACOM1_BASE: 264 aprint_normal_dev(self, "SA-11x0 UART1\n"); 265 break; 266 case SACOM2_BASE: 267 aprint_normal_dev(self, "SA-11x0 UART2 (IRDA)\n"); 268 break; 269 case SACOM3_BASE: 270 aprint_normal_dev(self, "SA-11x0 UART3\n"); 271 break; 272 default: 273 aprint_normal_dev(self, "unknown SA-11x0 UART\n"); 274 break; 275 } 276 277 sacom_attach_subr(sc); 278 279 #ifdef hpcarm 280 /* Do hpcarm specific initialization, if any */ 281 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 282 mdinit = p->data; 283 (*mdinit)(parent, self); 284 } 285 #endif 286 287 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 288 } 289 290 void 291 sacom_attach_subr(struct sacom_softc *sc) 292 { 293 bus_addr_t iobase = sc->sc_baseaddr; 294 bus_space_tag_t iot = sc->sc_iot; 295 struct tty *tp; 296 297 /* XXX Do we need to disable interrupts here? */ 298 299 if (iot == sacomconstag && iobase == sacomconsaddr) { 300 sacomconsattached = 1; 301 sc->sc_speed = SACOMSPEED(sacomconsrate); 302 303 /* Make sure the console is always "hardwired". */ 304 delay(10000); /* wait for output to finish */ 305 SET(sc->sc_hwflags, COM_HW_CONSOLE); 306 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 307 } 308 309 tp = tty_alloc(); 310 tp->t_oproc = sacomstart; 311 tp->t_param = sacomparam; 312 tp->t_hwiflow = sacomhwiflow; 313 314 sc->sc_tty = tp; 315 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 316 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 317 sc->sc_rbavail = SACOM_RING_SIZE; 318 if (sc->sc_rbuf == NULL) { 319 aprint_normal_dev(sc->sc_dev, "unable to allocate ring buffer\n"); 320 return; 321 } 322 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 323 sc->sc_tbc = 0; 324 325 tty_attach(tp); 326 327 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 328 int maj; 329 330 /* locate the major number */ 331 maj = cdevsw_lookup_major(&sacom_cdevsw); 332 333 cn_tab->cn_dev = makedev(maj, device_unit(sc->sc_dev)); 334 335 delay(10000); /* XXX */ 336 aprint_normal_dev(sc->sc_dev, "console\n"); 337 delay(10000); /* XXX */ 338 } 339 340 341 sc->sc_si = softint_establish(SOFTINT_SERIAL, sacomsoft, sc); 342 343 #ifdef RND_COM 344 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 345 RND_TYPE_TTY, 0); 346 #endif 347 348 /* if there are no enable/disable functions, assume the device 349 is always enabled */ 350 if (!sc->enable) 351 sc->enabled = 1; 352 353 sacom_config(sc); 354 355 SET(sc->sc_hwflags, COM_HW_DEV_OK); 356 } 357 358 /* This is necessary when dynamically changing SAIP configuration. */ 359 int 360 sacom_detach(device_t dev, int flags) 361 { 362 struct sacom_softc *sc = device_private(dev); 363 int maj, mn; 364 365 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) 366 return EBUSY; 367 368 if (sc->disable != NULL && sc->enabled != 0) { 369 (*sc->disable)(sc); 370 sc->enabled = 0; 371 } 372 373 /* locate the major number */ 374 maj = cdevsw_lookup_major(&sacom_cdevsw); 375 376 /* Nuke the vnodes for any open instances. */ 377 mn = device_unit(dev); 378 vdevgone(maj, mn, mn, VCHR); 379 380 mn |= COMDIALOUT_MASK; 381 vdevgone(maj, mn, mn, VCHR); 382 383 /* Free the receive buffer. */ 384 free(sc->sc_rbuf, M_DEVBUF); 385 386 /* Detach and free the tty. */ 387 tty_detach(sc->sc_tty); 388 tty_free(sc->sc_tty); 389 390 /* Unhook the soft interrupt handler. */ 391 softint_disestablish(sc->sc_si); 392 393 #ifdef RND_COM 394 /* Unhook the entropy source. */ 395 rnd_detach_source(&sc->rnd_source); 396 #endif 397 398 return 0; 399 } 400 401 void 402 sacom_config(struct sacom_softc *sc) 403 { 404 bus_space_tag_t iot = sc->sc_iot; 405 bus_space_handle_t ioh = sc->sc_ioh; 406 407 /* Disable engine before configuring the device. */ 408 sc->sc_cr3 = 0; 409 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 410 411 #ifdef DDB 412 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 413 sacom_enable_debugport(sc); 414 #endif 415 } 416 417 #ifdef DDB 418 static void 419 sacom_enable_debugport(struct sacom_softc *sc) 420 { 421 bus_space_tag_t iot = sc->sc_iot; 422 bus_space_handle_t ioh = sc->sc_ioh; 423 int s; 424 425 s = splserial(); 426 COM_LOCK(sc); 427 sc->sc_cr3 = CR3_RXE | CR3_TXE; 428 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 429 COM_UNLOCK(sc); 430 splx(s); 431 } 432 #endif 433 434 int 435 sacom_activate(device_t dev, enum devact act) 436 { 437 struct sacom_softc *sc = device_private(dev); 438 439 switch (act) { 440 case DVACT_DEACTIVATE: 441 sc->enabled = 0; 442 return 0; 443 default: 444 return EOPNOTSUPP; 445 } 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 aprint_normal_dev(sc->sc_dev, "device enable failed\n"); 531 return EIO; 532 } 533 sc->enabled = 1; 534 sacom_config(sc); 535 } 536 537 /* Turn on interrupts. */ 538 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 539 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 540 sc->sc_cr3); 541 542 543 COM_UNLOCK(sc); 544 splx(s2); 545 546 /* 547 * Initialize the termios status to the defaults. Add in the 548 * sticky bits from TIOCSFLAGS. 549 */ 550 t.c_ispeed = 0; 551 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 552 t.c_ospeed = sacomconsrate; 553 t.c_cflag = sacomconscflag; 554 } else { 555 t.c_ospeed = TTYDEF_SPEED; 556 t.c_cflag = TTYDEF_CFLAG; 557 } 558 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 559 SET(t.c_cflag, CLOCAL); 560 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 561 SET(t.c_cflag, CRTSCTS); 562 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 563 SET(t.c_cflag, MDMBUF); 564 /* Make sure sacomparam() will do something. */ 565 tp->t_ospeed = 0; 566 (void) sacomparam(tp, &t); 567 tp->t_iflag = TTYDEF_IFLAG; 568 tp->t_oflag = TTYDEF_OFLAG; 569 tp->t_lflag = TTYDEF_LFLAG; 570 ttychars(tp); 571 ttsetwater(tp); 572 573 s2 = splserial(); 574 COM_LOCK(sc); 575 576 /* 577 * Turn on DTR. We must always do this, even if carrier is not 578 * present, because otherwise we'd have to use TIOCSDTR 579 * immediately after setting CLOCAL, which applications do not 580 * expect. We always assert DTR while the device is open 581 * unless explicitly requested to deassert it. 582 */ 583 sacom_modem(sc, 1); 584 585 /* Clear the input ring, and unblock. */ 586 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 587 sc->sc_rbavail = SACOM_RING_SIZE; 588 sacom_iflush(sc); 589 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 590 sacom_hwiflow(sc); 591 592 #ifdef COM_DEBUG 593 if (sacom_debug) 594 comstatus(sc, "sacomopen "); 595 #endif 596 597 COM_UNLOCK(sc); 598 splx(s2); 599 } 600 601 splx(s); 602 603 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 604 if (error) 605 goto bad; 606 607 error = (*tp->t_linesw->l_open)(dev, tp); 608 if (error) 609 goto bad; 610 611 return 0; 612 613 bad: 614 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 615 /* 616 * We failed to open the device, and nobody else had it opened. 617 * Clean up the state as appropriate. 618 */ 619 sacom_shutdown(sc); 620 } 621 622 return error; 623 } 624 625 int 626 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 627 { 628 struct sacom_softc *sc = 629 device_lookup_private(&sacom_cd, COMUNIT(dev)); 630 struct tty *tp = sc->sc_tty; 631 632 /* XXX This is for cons.c. */ 633 if (!ISSET(tp->t_state, TS_ISOPEN)) 634 return 0; 635 636 (*tp->t_linesw->l_close)(tp, flag); 637 ttyclose(tp); 638 639 if (COM_ISALIVE(sc) == 0) 640 return 0; 641 642 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 643 /* 644 * Although we got a last close, the device may still be in 645 * use; e.g. if this was the dialout node, and there are still 646 * processes waiting for carrier on the non-dialout node. 647 */ 648 sacom_shutdown(sc); 649 } 650 651 return 0; 652 } 653 654 int 655 sacomread(dev_t dev, struct uio *uio, int flag) 656 { 657 struct sacom_softc *sc = 658 device_lookup_private(&sacom_cd, COMUNIT(dev)); 659 struct tty *tp = sc->sc_tty; 660 661 if (COM_ISALIVE(sc) == 0) 662 return EIO; 663 664 return (*tp->t_linesw->l_read)(tp, uio, flag); 665 } 666 667 int 668 sacomwrite(dev_t dev, struct uio *uio, int flag) 669 { 670 struct sacom_softc *sc = 671 device_lookup_private(&sacom_cd, COMUNIT(dev)); 672 struct tty *tp = sc->sc_tty; 673 674 if (COM_ISALIVE(sc) == 0) 675 return EIO; 676 677 return (*tp->t_linesw->l_write)(tp, uio, flag); 678 } 679 680 int 681 sacompoll(dev_t dev, int events, struct lwp *l) 682 { 683 struct sacom_softc *sc = 684 device_lookup_private(&sacom_cd, COMUNIT(dev)); 685 struct tty *tp = sc->sc_tty; 686 687 if (COM_ISALIVE(sc) == 0) 688 return EIO; 689 690 return (*tp->t_linesw->l_poll)(tp, events, l); 691 } 692 693 struct tty * 694 sacomtty(dev_t dev) 695 { 696 struct sacom_softc *sc = 697 device_lookup_private(&sacom_cd, COMUNIT(dev)); 698 struct tty *tp = sc->sc_tty; 699 700 return tp; 701 } 702 703 int 704 sacomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 705 { 706 struct sacom_softc *sc = 707 device_lookup_private(&sacom_cd, COMUNIT(dev)); 708 struct tty *tp = sc->sc_tty; 709 int error; 710 int s; 711 712 if (COM_ISALIVE(sc) == 0) 713 return EIO; 714 715 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 716 if (error != EPASSTHROUGH) 717 return error; 718 719 error = ttioctl(tp, cmd, data, flag, l); 720 if (error != EPASSTHROUGH) 721 return error; 722 723 error = 0; 724 725 s = splserial(); 726 COM_LOCK(sc); 727 728 switch (cmd) { 729 case TIOCSBRK: 730 sacom_break(sc, 1); 731 break; 732 733 case TIOCCBRK: 734 sacom_break(sc, 0); 735 break; 736 737 case TIOCSDTR: 738 sacom_modem(sc, 1); 739 break; 740 741 case TIOCCDTR: 742 sacom_modem(sc, 0); 743 break; 744 745 case TIOCGFLAGS: 746 *(int *)data = sc->sc_swflags; 747 break; 748 749 case TIOCSFLAGS: 750 error = kauth_authorize_device_tty(l->l_cred, 751 KAUTH_DEVICE_TTY_PRIVSET, tp); 752 if (error) 753 break; 754 sc->sc_swflags = *(int *)data; 755 break; 756 757 case TIOCMSET: 758 case TIOCMBIS: 759 case TIOCMBIC: 760 tiocm_to_sacom(sc, cmd, *(int *)data); 761 break; 762 763 case TIOCMGET: 764 *(int *)data = sacom_to_tiocm(sc); 765 break; 766 767 default: 768 error = EPASSTHROUGH; 769 break; 770 } 771 772 COM_UNLOCK(sc); 773 splx(s); 774 775 #ifdef COM_DEBUG 776 if (sacom_debug) 777 comstatus(sc, "comioctl "); 778 #endif 779 780 return error; 781 } 782 783 static inline void 784 sacom_schedrx(struct sacom_softc *sc) 785 { 786 787 sc->sc_rx_ready = 1; 788 789 /* Wake up the poller. */ 790 softint_schedule(sc->sc_si); 791 } 792 793 void 794 sacom_break(struct sacom_softc *sc, int onoff) 795 { 796 797 if (onoff) 798 SET(sc->sc_cr3, CR3_BRK); 799 else 800 CLR(sc->sc_cr3, CR3_BRK); 801 802 if (!sc->sc_heldchange) { 803 if (sc->sc_tx_busy) { 804 sc->sc_heldtbc = sc->sc_tbc; 805 sc->sc_tbc = 0; 806 sc->sc_heldchange = 1; 807 } else 808 sacom_loadchannelregs(sc); 809 } 810 } 811 812 void 813 sacom_modem(struct sacom_softc *sc, int onoff) 814 { 815 if (!sc->sc_heldchange) { 816 if (sc->sc_tx_busy) { 817 sc->sc_heldtbc = sc->sc_tbc; 818 sc->sc_tbc = 0; 819 sc->sc_heldchange = 1; 820 } else 821 sacom_loadchannelregs(sc); 822 } 823 } 824 825 void 826 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 827 { 828 } 829 830 int 831 sacom_to_tiocm(struct sacom_softc *sc) 832 { 833 int ttybits = 0; 834 835 if (sc->sc_cr3 != 0) 836 SET(ttybits, TIOCM_LE); 837 838 return ttybits; 839 } 840 841 static u_int 842 cflag2cr0(tcflag_t cflag) 843 { 844 u_int cr0; 845 846 cr0 = (cflag & PARENB) ? CR0_PE : 0; 847 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 848 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 849 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 850 851 return cr0; 852 } 853 854 int 855 sacomparam(struct tty *tp, struct termios *t) 856 { 857 struct sacom_softc *sc = 858 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 859 int ospeed = SACOMSPEED(t->c_ospeed); 860 u_int cr0; 861 int s; 862 863 if (COM_ISALIVE(sc) == 0) 864 return EIO; 865 866 /* Check requested parameters. */ 867 if (ospeed < 0) 868 return EINVAL; 869 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 870 return EINVAL; 871 872 /* 873 * For the console, always force CLOCAL and !HUPCL, so that the port 874 * is always active. 875 */ 876 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 877 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 878 SET(t->c_cflag, CLOCAL); 879 CLR(t->c_cflag, HUPCL); 880 } 881 882 /* 883 * If there were no changes, don't do anything. This avoids dropping 884 * input and improves performance when all we did was frob things like 885 * VMIN and VTIME. 886 */ 887 if (tp->t_ospeed == t->c_ospeed && 888 tp->t_cflag == t->c_cflag) 889 return 0; 890 891 cr0 = cflag2cr0(t->c_cflag); 892 893 s = splserial(); 894 COM_LOCK(sc); 895 896 sc->sc_cr0 = cr0; 897 898 sc->sc_speed = ospeed; 899 900 /* And copy to tty. */ 901 tp->t_ispeed = 0; 902 tp->t_ospeed = t->c_ospeed; 903 tp->t_cflag = t->c_cflag; 904 905 if (!sc->sc_heldchange) { 906 if (sc->sc_tx_busy) { 907 sc->sc_heldtbc = sc->sc_tbc; 908 sc->sc_tbc = 0; 909 sc->sc_heldchange = 1; 910 } else 911 sacom_loadchannelregs(sc); 912 } 913 914 if (!ISSET(t->c_cflag, CHWFLOW)) { 915 /* Disable the high water mark. */ 916 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 917 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 918 sacom_schedrx(sc); 919 } 920 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 921 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 922 sacom_hwiflow(sc); 923 } 924 } 925 926 COM_UNLOCK(sc); 927 splx(s); 928 929 (void) (*tp->t_linesw->l_modem)(tp, 1); 930 931 #ifdef COM_DEBUG 932 if (sacom_debug) 933 comstatus(sc, "comparam "); 934 #endif 935 936 return 0; 937 } 938 939 void 940 sacom_iflush(struct sacom_softc *sc) 941 { 942 bus_space_tag_t iot = sc->sc_iot; 943 bus_space_handle_t ioh = sc->sc_ioh; 944 #ifdef DIAGNOSTIC 945 int reg; 946 #endif 947 int timo; 948 949 #ifdef DIAGNOSTIC 950 reg = 0xffff; 951 #endif 952 timo = 50; 953 /* flush any pending I/O */ 954 if (sc->sc_cr3 & CR3_RXE) { 955 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 956 && --timo) 957 #ifdef DIAGNOSTIC 958 reg = 959 #else 960 (void) 961 #endif 962 bus_space_read_4(iot, ioh, SACOM_DR); 963 } 964 #if 0 965 /* XXX is it good idea to wait TX finish? */ 966 if (sc->sc_cr3 & CR3_TXE) { 967 timo = 500; 968 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 969 && --timo) 970 delay(100); 971 } 972 #endif 973 #ifdef DIAGNOSTIC 974 if (!timo) 975 aprint_debug_dev(sc->sc_dev, "sacom_iflush timeout %02x\n", reg); 976 #endif 977 } 978 979 void 980 sacom_loadchannelregs(struct sacom_softc *sc) 981 { 982 bus_space_tag_t iot = sc->sc_iot; 983 bus_space_handle_t ioh = sc->sc_ioh; 984 985 /* XXXXX necessary? */ 986 sacom_iflush(sc); 987 988 /* Need to stop engines first. */ 989 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 990 991 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 992 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 993 994 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 995 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 996 } 997 998 int 999 sacomhwiflow(struct tty *tp, int block) 1000 { 1001 #if 0 1002 struct sacom_softc *sc = 1003 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1004 int s; 1005 1006 if (COM_ISALIVE(sc) == 0) 1007 return 0; 1008 1009 if (sc->sc_mcr_rts == 0) 1010 return 0; 1011 1012 s = splserial(); 1013 COM_LOCK(sc); 1014 1015 if (block) { 1016 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1017 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1018 sacom_hwiflow(sc); 1019 } 1020 } else { 1021 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1022 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1023 sacom_schedrx(sc); 1024 } 1025 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1026 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1027 sacom_hwiflow(sc); 1028 } 1029 } 1030 1031 COM_UNLOCK(sc); 1032 splx(s); 1033 #endif 1034 return 1; 1035 } 1036 1037 /* 1038 * (un)block input via hw flowcontrol 1039 */ 1040 void 1041 sacom_hwiflow(struct sacom_softc *sc) 1042 { 1043 #if 0 1044 bus_space_tag_t iot = sc->sc_iot; 1045 bus_space_handle_t ioh = sc->sc_ioh; 1046 1047 /* XXX implement */ 1048 #endif 1049 } 1050 1051 1052 void 1053 sacomstart(struct tty *tp) 1054 { 1055 struct sacom_softc *sc = 1056 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1057 bus_space_tag_t iot = sc->sc_iot; 1058 bus_space_handle_t ioh = sc->sc_ioh; 1059 int s; 1060 1061 if (COM_ISALIVE(sc) == 0) 1062 return; 1063 1064 s = spltty(); 1065 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1066 goto out; 1067 if (!ttypull(tp)) 1068 goto out; 1069 1070 /* Grab the first contiguous region of buffer space. */ 1071 { 1072 u_char *tba; 1073 int tbc; 1074 1075 tba = tp->t_outq.c_cf; 1076 tbc = ndqb(&tp->t_outq, 0); 1077 1078 (void)splserial(); 1079 COM_LOCK(sc); 1080 1081 sc->sc_tba = tba; 1082 sc->sc_tbc = tbc; 1083 } 1084 1085 SET(tp->t_state, TS_BUSY); 1086 sc->sc_tx_busy = 1; 1087 1088 /* Enable transmit completion interrupts if necessary. */ 1089 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1090 SET(sc->sc_cr3, CR3_TIE); 1091 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1092 } 1093 1094 /* Output the first chunk of the contiguous buffer. */ 1095 sacom_filltx(sc); 1096 1097 COM_UNLOCK(sc); 1098 out: 1099 splx(s); 1100 return; 1101 } 1102 1103 void 1104 sacom_filltx(struct sacom_softc *sc) 1105 { 1106 bus_space_tag_t iot = sc->sc_iot; 1107 bus_space_handle_t ioh = sc->sc_ioh; 1108 int c, n; 1109 1110 n = 0; 1111 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1112 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1113 break; 1114 c = *(sc->sc_tba + n); 1115 c &= 0xff; 1116 bus_space_write_4(iot, ioh, SACOM_DR, c); 1117 n++; 1118 } 1119 sc->sc_tbc -= n; 1120 sc->sc_tba += n; 1121 } 1122 1123 /* 1124 * Stop output on a line. 1125 */ 1126 void 1127 sacomstop(struct tty *tp, int flag) 1128 { 1129 struct sacom_softc *sc = 1130 device_lookup_private(&sacom_cd, COMUNIT(tp->t_dev)); 1131 int s; 1132 1133 s = splserial(); 1134 COM_LOCK(sc); 1135 if (ISSET(tp->t_state, TS_BUSY)) { 1136 /* Stop transmitting at the next chunk. */ 1137 sc->sc_tbc = 0; 1138 sc->sc_heldtbc = 0; 1139 if (!ISSET(tp->t_state, TS_TTSTOP)) 1140 SET(tp->t_state, TS_FLUSH); 1141 } 1142 COM_UNLOCK(sc); 1143 splx(s); 1144 } 1145 1146 static inline void 1147 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1148 { 1149 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1150 u_char *get, *end; 1151 u_int cc, scc; 1152 u_char sr1; 1153 int code; 1154 int s; 1155 1156 end = sc->sc_ebuf; 1157 get = sc->sc_rbget; 1158 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1159 1160 while (cc) { 1161 code = get[0]; 1162 sr1 = get[1]; 1163 if (ISSET(sr1, SR1_FRE)) 1164 SET(code, TTY_FE); 1165 if (ISSET(sr1, SR1_PRE)) 1166 SET(code, TTY_PE); 1167 if ((*rint)(code, tp) == -1) { 1168 /* 1169 * The line discipline's buffer is out of space. 1170 */ 1171 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1172 /* 1173 * We're either not using flow control, or the 1174 * line discipline didn't tell us to block for 1175 * some reason. Either way, we have no way to 1176 * know when there's more space available, so 1177 * just drop the rest of the data. 1178 */ 1179 get += cc << 1; 1180 if (get >= end) 1181 get -= SACOM_RING_SIZE << 1; 1182 cc = 0; 1183 } else { 1184 /* 1185 * Don't schedule any more receive processing 1186 * until the line discipline tells us there's 1187 * space available (through comhwiflow()). 1188 * Leave the rest of the data in the input 1189 * buffer. 1190 */ 1191 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1192 } 1193 break; 1194 } 1195 get += 2; 1196 if (get >= end) 1197 get = sc->sc_rbuf; 1198 cc--; 1199 } 1200 1201 if (cc != scc) { 1202 sc->sc_rbget = get; 1203 s = splserial(); 1204 COM_LOCK(sc); 1205 1206 cc = sc->sc_rbavail += scc - cc; 1207 /* Buffers should be ok again, release possible block. */ 1208 if (cc >= 1) { 1209 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1210 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1211 SET(sc->sc_cr3, CR3_RIE); 1212 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1213 SACOM_CR3, sc->sc_cr3); 1214 } 1215 } 1216 COM_UNLOCK(sc); 1217 splx(s); 1218 } 1219 } 1220 1221 static inline void 1222 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1223 { 1224 1225 CLR(tp->t_state, TS_BUSY); 1226 if (ISSET(tp->t_state, TS_FLUSH)) 1227 CLR(tp->t_state, TS_FLUSH); 1228 else 1229 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1230 (*tp->t_linesw->l_start)(tp); 1231 } 1232 1233 static inline void 1234 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1235 { 1236 } 1237 1238 void 1239 sacomsoft(void *arg) 1240 { 1241 struct sacom_softc *sc = arg; 1242 struct tty *tp; 1243 1244 if (COM_ISALIVE(sc) == 0) 1245 return; 1246 1247 tp = sc->sc_tty; 1248 1249 if (sc->sc_rx_ready) { 1250 sc->sc_rx_ready = 0; 1251 sacom_rxsoft(sc, tp); 1252 } 1253 1254 if (sc->sc_st_check) { 1255 sc->sc_st_check = 0; 1256 sacom_stsoft(sc, tp); 1257 } 1258 1259 if (sc->sc_tx_done) { 1260 sc->sc_tx_done = 0; 1261 sacom_txsoft(sc, tp); 1262 } 1263 } 1264 1265 int 1266 sacomintr(void *arg) 1267 { 1268 struct sacom_softc *sc = arg; 1269 bus_space_tag_t iot = sc->sc_iot; 1270 bus_space_handle_t ioh = sc->sc_ioh; 1271 u_char *put, *end; 1272 u_int cc; 1273 u_int sr0, sr1; 1274 1275 if (COM_ISALIVE(sc) == 0) 1276 return 0; 1277 1278 COM_LOCK(sc); 1279 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1280 if (!sr0) { 1281 COM_UNLOCK(sc); 1282 return 0; 1283 } 1284 if (ISSET(sr0, SR0_EIF)) 1285 /* XXX silently discard error bits */ 1286 bus_space_read_4(iot, ioh, SACOM_DR); 1287 if (ISSET(sr0, SR0_RBB)) 1288 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1289 if (ISSET(sr0, SR0_REB)) { 1290 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1291 #if defined(DDB) || defined(KGDB) 1292 #ifndef DDB_BREAK_CHAR 1293 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1294 console_debugger(); 1295 } 1296 #endif 1297 #endif /* DDB || KGDB */ 1298 } 1299 1300 1301 end = sc->sc_ebuf; 1302 put = sc->sc_rbput; 1303 cc = sc->sc_rbavail; 1304 1305 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1306 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1307 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1308 while (cc > 0) { 1309 if (!ISSET(sr1, SR1_RNE)) { 1310 bus_space_write_4(iot, ioh, SACOM_SR0, 1311 SR0_RID); 1312 break; 1313 } 1314 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1315 put[1] = sr1; 1316 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1317 if (put[0] == DDB_BREAK_CHAR && 1318 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1319 console_debugger(); 1320 1321 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1322 continue; 1323 } 1324 #endif 1325 put += 2; 1326 if (put >= end) 1327 put = sc->sc_rbuf; 1328 cc--; 1329 1330 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1331 } 1332 1333 /* 1334 * Current string of incoming characters ended because 1335 * no more data was available or we ran out of space. 1336 * Schedule a receive event if any data was received. 1337 * If we're out of space, turn off receive interrupts. 1338 */ 1339 sc->sc_rbput = put; 1340 sc->sc_rbavail = cc; 1341 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1342 sc->sc_rx_ready = 1; 1343 1344 /* XXX do RX hardware flow control */ 1345 1346 /* 1347 * If we're out of space, disable receive interrupts 1348 * until the queue has drained a bit. 1349 */ 1350 if (!cc) { 1351 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1352 CLR(sc->sc_cr3, CR3_RIE); 1353 bus_space_write_4(iot, ioh, SACOM_CR3, 1354 sc->sc_cr3); 1355 } 1356 } else { 1357 #ifdef DIAGNOSTIC 1358 panic("sacomintr: we shouldn't reach here"); 1359 #endif 1360 CLR(sc->sc_cr3, CR3_RIE); 1361 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1362 } 1363 } 1364 1365 /* 1366 * Done handling any receive interrupts. See if data can be 1367 * transmitted as well. Schedule tx done event if no data left 1368 * and tty was marked busy. 1369 */ 1370 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1371 if (ISSET(sr0, SR0_TFS)) { 1372 /* 1373 * If we've delayed a parameter change, do it now, and restart 1374 * output. 1375 * XXX sacom_loadchannelregs() waits TX completion, 1376 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1377 */ 1378 if (sc->sc_heldchange) { 1379 sacom_loadchannelregs(sc); 1380 sc->sc_heldchange = 0; 1381 sc->sc_tbc = sc->sc_heldtbc; 1382 sc->sc_heldtbc = 0; 1383 } 1384 1385 /* Output the next chunk of the contiguous buffer, if any. */ 1386 if (sc->sc_tbc > 0) { 1387 sacom_filltx(sc); 1388 } else { 1389 /* Disable transmit completion interrupts if necessary. */ 1390 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1391 CLR(sc->sc_cr3, CR3_TIE); 1392 bus_space_write_4(iot, ioh, SACOM_CR3, 1393 sc->sc_cr3); 1394 } 1395 if (sc->sc_tx_busy) { 1396 sc->sc_tx_busy = 0; 1397 sc->sc_tx_done = 1; 1398 } 1399 } 1400 } 1401 COM_UNLOCK(sc); 1402 1403 /* Wake up the poller. */ 1404 softint_schedule(sc->sc_si); 1405 1406 #ifdef RND_COM 1407 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1408 #endif 1409 return 1; 1410 } 1411 1412 static void 1413 sacom_j720_init(device_t parent, device_t self) 1414 { 1415 struct sa11x0_softc *sasc; 1416 1417 sasc = device_private(parent); 1418 1419 /* XXX this should be done at sc->enable function */ 1420 bus_space_write_4(sasc->sc_iot, sasc->sc_gpioh, 1421 SAGPIO_PCR, 0xa0000); 1422 bus_space_write_4(sasc->sc_iot, sasc->sc_gpioh, 1423 SAGPIO_PSR, 0x100); 1424 } 1425 1426 /* Initialization for serial console */ 1427 int 1428 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1429 bus_space_handle_t *iohp) 1430 { 1431 int brd, cr0; 1432 1433 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1434 aprint_normal("register map failed\n"); 1435 1436 /* wait for the Tx queue to drain and disable the UART */ 1437 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1438 continue; 1439 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1440 1441 cr0 = cflag2cr0(cflag); 1442 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1443 1444 brd = SACOMSPEED(baud); 1445 sacomconsrate = baud; 1446 sacomconsaddr = iobase; 1447 sacomconscflag = cflag; 1448 /* XXX assumes little endian */ 1449 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1450 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1451 1452 /* enable the UART */ 1453 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1454 1455 return 0; 1456 } 1457 1458 void 1459 sacomcnprobe(struct consdev *cp) 1460 { 1461 cp->cn_pri = CN_REMOTE; 1462 } 1463 1464 void 1465 sacomcninit(struct consdev *cp) 1466 { 1467 if (cp == NULL) { 1468 /* XXX cp == NULL means that MMU is disabled. */ 1469 sacomconsioh = SACOM3_BASE; 1470 sacomconstag = &sa11x0_bs_tag; 1471 cn_tab = &sacomcons; 1472 return; 1473 } 1474 1475 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1476 CONMODE, &sacomconsioh)) 1477 panic("can't init serial console @%x", CONADDR); 1478 cn_tab = &sacomcons; 1479 sacomconstag = &sa11x0_bs_tag; 1480 } 1481 1482 int 1483 sacomcngetc(dev_t dev) 1484 { 1485 int c, s; 1486 1487 s = spltty(); /* XXX do we need this? */ 1488 1489 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1490 & SR1_RNE)) { 1491 #if defined(DDB) || defined(KGDB) 1492 #ifndef DDB_BREAK_CHAR 1493 u_int sr0; 1494 extern int db_active; 1495 1496 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1497 if (ISSET(sr0, SR0_RBB)) 1498 bus_space_write_4(sacomconstag, sacomconsioh, 1499 SACOM_SR0, SR0_RBB); 1500 if (ISSET(sr0, SR0_REB)) { 1501 bus_space_write_4(sacomconstag, sacomconsioh, 1502 SACOM_SR0, SR0_REB); 1503 if (db_active == 0) 1504 console_debugger(); 1505 } 1506 #endif 1507 #endif /* DDB || KGDB */ 1508 } 1509 1510 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1511 c &= 0xff; 1512 splx(s); 1513 1514 return c; 1515 } 1516 1517 void 1518 sacomcnputc(dev_t dev, int c) 1519 { 1520 int s; 1521 1522 s = spltty(); /* XXX do we need this? */ 1523 1524 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1525 & SR1_TNF)) 1526 continue; 1527 1528 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1529 splx(s); 1530 } 1531 1532 void 1533 sacomcnpollc(dev_t dev, int on) 1534 { 1535 1536 } 1537 1538 #if 0 1539 #ifdef DEBUG 1540 int 1541 sacomcncharpoll(void) 1542 { 1543 int c; 1544 1545 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1546 & SR1_RNE)) 1547 return -1; 1548 1549 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1550 c &= 0xff; 1551 1552 return c; 1553 } 1554 #endif 1555 #endif 1556 1557 /* helper function to identify the com ports used by 1558 console or KGDB (and not yet autoconf attached) */ 1559 int 1560 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1561 bus_space_handle_t *ioh) 1562 { 1563 bus_space_handle_t help; 1564 1565 if (!sacomconsattached && 1566 iot == sacomconstag && iobase == sacomconsaddr) 1567 help = sacomconsioh; 1568 else 1569 return 0; 1570 1571 if (ioh) 1572 *ioh = help; 1573 return 1; 1574 } 1575
Indexes created Thu Oct 02 10:09:58 GMT 2025