sa11x0_com.c revision 1.35
1 /* $NetBSD: sa11x0_com.c,v 1.35 2006/07/23 22:06:04 ad 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 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 /* 43 * Copyright (c) 1991 The Regents of the University of California. 44 * All rights reserved. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)com.c 7.5 (Berkeley) 5/16/91 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: sa11x0_com.c,v 1.35 2006/07/23 22:06:04 ad Exp $"); 75 76 #include "opt_com.h" 77 #include "opt_ddb.h" 78 #include "opt_ddbparam.h" 79 #include "opt_kgdb.h" 80 #include "opt_multiprocessor.h" 81 #include "opt_lockdebug.h" 82 83 #include "rnd.h" 84 #if NRND > 0 && defined(RND_COM) 85 #include <sys/rnd.h> 86 #endif 87 88 #include <sys/param.h> 89 #include <sys/systm.h> 90 #include <sys/types.h> 91 #include <sys/conf.h> 92 #include <sys/file.h> 93 #include <sys/device.h> 94 #include <sys/kernel.h> 95 #include <sys/malloc.h> 96 #include <sys/tty.h> 97 #include <sys/uio.h> 98 #include <sys/vnode.h> 99 #include <sys/kauth.h> 100 101 #include <dev/cons.h> 102 103 #include <machine/bus.h> 104 #include <arm/sa11x0/sa11x0_reg.h> 105 #include <arm/sa11x0/sa11x0_var.h> 106 #include <arm/sa11x0/sa11x0_comreg.h> 107 #include <arm/sa11x0/sa11x0_comvar.h> 108 #include <arm/sa11x0/sa11x0_gpioreg.h> 109 110 #ifdef hpcarm 111 #include <hpc/include/platid.h> 112 #include <hpc/include/platid_mask.h> 113 #endif 114 115 #include "sacom.h" 116 117 dev_type_open(sacomopen); 118 dev_type_close(sacomclose); 119 dev_type_read(sacomread); 120 dev_type_write(sacomwrite); 121 dev_type_ioctl(sacomioctl); 122 dev_type_stop(sacomstop); 123 dev_type_tty(sacomtty); 124 dev_type_poll(sacompoll); 125 126 const struct cdevsw sacom_cdevsw = { 127 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 128 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 129 }; 130 131 static int sacom_match(struct device *, struct cfdata *, void *); 132 static void sacom_attach(struct device *, struct device *, void *); 133 static void sacom_filltx(struct sacom_softc *); 134 static void sacom_attach_subr(struct sacom_softc *); 135 #if defined(DDB) || defined(KGDB) 136 static void sacom_enable_debugport(struct sacom_softc *); 137 #endif 138 int sacom_detach(struct device *, int); 139 void sacom_config(struct sacom_softc *); 140 int sacom_activate(struct device *, enum devact); 141 void sacom_shutdown(struct sacom_softc *); 142 static u_int cflag2cr0(tcflag_t); 143 int sacomparam(struct tty *, struct termios *); 144 void sacomstart(struct tty *); 145 int sacomhwiflow(struct tty *, int); 146 147 void sacom_loadchannelregs(struct sacom_softc *); 148 void sacom_hwiflow(struct sacom_softc *); 149 void sacom_break(struct sacom_softc *, int); 150 void sacom_modem(struct sacom_softc *, int); 151 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 152 int sacom_to_tiocm(struct sacom_softc *); 153 void sacom_iflush(struct sacom_softc *); 154 155 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 156 bus_space_handle_t *); 157 int sacom_is_console(bus_space_tag_t, bus_addr_t, 158 bus_space_handle_t *); 159 160 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 161 void sacomsoft(void *); 162 #else 163 void sacomsoft(void); 164 #endif 165 166 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 167 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 168 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 169 static inline void sacom_schedrx(struct sacom_softc *); 170 171 #ifdef hpcarm 172 /* HPCARM specific functions */ 173 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 174 #endif 175 176 #define COMUNIT_MASK 0x7ffff 177 #define COMDIALOUT_MASK 0x80000 178 179 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 180 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 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(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(struct device *parent, struct cfdata *match, void *aux) 235 { 236 237 return 1; 238 } 239 240 void 241 sacom_attach(struct device *parent, struct device *self, void *aux) 242 { 243 struct sacom_softc *sc = (struct sacom_softc*)self; 244 struct sa11x0_attach_args *sa = aux; 245 246 #ifdef hpcarm 247 struct platid_data *p; 248 void (*mdinit)(struct device *, struct sacom_softc *); 249 #endif 250 251 printf("\n"); 252 253 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 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 259 return; 260 } 261 262 printf("%s: ", sc->sc_dev.dv_xname); 263 switch (sc->sc_baseaddr) { 264 case SACOM1_BASE: 265 printf("SA-11x0 UART1\n"); 266 break; 267 case SACOM2_BASE: 268 printf("SA-11x0 UART2 (IRDA)\n"); 269 break; 270 case SACOM3_BASE: 271 printf("SA-11x0 UART3\n"); 272 break; 273 default: 274 printf("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, sc); 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 = ttymalloc(); 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 = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 317 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 318 sc->sc_rbavail = SACOM_RING_SIZE; 319 if (sc->sc_rbuf == NULL) { 320 printf("%s: unable to allocate ring buffer\n", 321 sc->sc_dev.dv_xname); 322 return; 323 } 324 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 325 sc->sc_tbc = 0; 326 327 tty_attach(tp); 328 329 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 330 int maj; 331 332 /* locate the major number */ 333 maj = cdevsw_lookup_major(&sacom_cdevsw); 334 335 cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev)); 336 337 delay(10000); /* XXX */ 338 printf("%s: console\n", sc->sc_dev.dv_xname); 339 delay(10000); /* XXX */ 340 } 341 342 343 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 344 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 345 #endif 346 347 #if NRND > 0 && defined(RND_COM) 348 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 349 RND_TYPE_TTY, 0); 350 #endif 351 352 /* if there are no enable/disable functions, assume the device 353 is always enabled */ 354 if (!sc->enable) 355 sc->enabled = 1; 356 357 sacom_config(sc); 358 359 SET(sc->sc_hwflags, COM_HW_DEV_OK); 360 } 361 362 /* This is necessary when dynamically changing SAIP configuration. */ 363 int 364 sacom_detach(struct device *self, int flags) 365 { 366 struct sacom_softc *sc = (struct sacom_softc *)self; 367 int maj, mn; 368 369 /* locate the major number */ 370 maj = cdevsw_lookup_major(&sacom_cdevsw); 371 372 /* Nuke the vnodes for any open instances. */ 373 mn = device_unit(self); 374 vdevgone(maj, mn, mn, VCHR); 375 376 mn |= COMDIALOUT_MASK; 377 vdevgone(maj, mn, mn, VCHR); 378 379 /* Free the receive buffer. */ 380 free(sc->sc_rbuf, M_DEVBUF); 381 382 /* Detach and free the tty. */ 383 tty_detach(sc->sc_tty); 384 ttyfree(sc->sc_tty); 385 386 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 387 /* Unhook the soft interrupt handler. */ 388 softintr_disestablish(sc->sc_si); 389 #endif 390 391 #if NRND > 0 && defined(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(struct device *self, enum devact act) 434 { 435 struct sacom_softc *sc = (struct sacom_softc *)self; 436 int s, rv = 0; 437 438 s = splserial(); 439 COM_LOCK(sc); 440 switch (act) { 441 case DVACT_ACTIVATE: 442 rv = EOPNOTSUPP; 443 break; 444 445 case DVACT_DEACTIVATE: 446 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 447 rv = EBUSY; 448 break; 449 } 450 451 if (sc->disable != NULL && sc->enabled != 0) { 452 (*sc->disable)(sc); 453 sc->enabled = 0; 454 } 455 break; 456 } 457 458 COM_UNLOCK(sc); 459 splx(s); 460 return rv; 461 } 462 463 void 464 sacom_shutdown(struct sacom_softc *sc) 465 { 466 struct tty *tp = sc->sc_tty; 467 int s; 468 469 s = splserial(); 470 COM_LOCK(sc); 471 472 /* Clear any break condition set with TIOCSBRK. */ 473 sacom_break(sc, 0); 474 475 /* 476 * Hang up if necessary. Wait a bit, so the other side has time to 477 * notice even if we immediately open the port again. 478 * Avoid tsleeping above splhigh(). 479 */ 480 if (ISSET(tp->t_cflag, HUPCL)) { 481 sacom_modem(sc, 0); 482 COM_UNLOCK(sc); 483 splx(s); 484 /* XXX tsleep will only timeout */ 485 (void) tsleep(sc, TTIPRI, ttclos, hz); 486 s = splserial(); 487 COM_LOCK(sc); 488 } 489 490 /* Turn off interrupts. */ 491 sc->sc_cr3 = 0; 492 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 493 494 if (sc->disable) { 495 #ifdef DIAGNOSTIC 496 if (!sc->enabled) 497 panic("sacom_shutdown: not enabled?"); 498 #endif 499 (*sc->disable)(sc); 500 sc->enabled = 0; 501 } 502 COM_UNLOCK(sc); 503 splx(s); 504 } 505 506 int 507 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 508 { 509 struct sacom_softc *sc; 510 struct tty *tp; 511 int s, s2; 512 int error; 513 514 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 515 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 516 sc->sc_rbuf == NULL) 517 return ENXIO; 518 519 if (!device_is_active(&sc->sc_dev)) 520 return ENXIO; 521 522 tp = sc->sc_tty; 523 524 if (ISSET(tp->t_state, TS_ISOPEN) && 525 ISSET(tp->t_state, TS_XCLUDE) && 526 kauth_authorize_generic(l->l_cred, KAUTH_GENERIC_ISSUSER, 527 &l->l_acflag) != 0) 528 return EBUSY; 529 530 s = spltty(); 531 532 /* 533 * Do the following iff this is a first open. 534 */ 535 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 536 struct termios t; 537 538 tp->t_dev = dev; 539 540 s2 = splserial(); 541 COM_LOCK(sc); 542 543 if (sc->enable) { 544 if ((*sc->enable)(sc)) { 545 COM_UNLOCK(sc); 546 splx(s2); 547 splx(s); 548 printf("%s: device enable failed\n", 549 sc->sc_dev.dv_xname); 550 return EIO; 551 } 552 sc->enabled = 1; 553 sacom_config(sc); 554 } 555 556 /* Turn on interrupts. */ 557 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 558 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 559 sc->sc_cr3); 560 561 562 COM_UNLOCK(sc); 563 splx(s2); 564 565 /* 566 * Initialize the termios status to the defaults. Add in the 567 * sticky bits from TIOCSFLAGS. 568 */ 569 t.c_ispeed = 0; 570 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 571 t.c_ospeed = sacomconsrate; 572 t.c_cflag = sacomconscflag; 573 } else { 574 t.c_ospeed = TTYDEF_SPEED; 575 t.c_cflag = TTYDEF_CFLAG; 576 } 577 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 578 SET(t.c_cflag, CLOCAL); 579 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 580 SET(t.c_cflag, CRTSCTS); 581 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 582 SET(t.c_cflag, MDMBUF); 583 /* Make sure sacomparam() will do something. */ 584 tp->t_ospeed = 0; 585 (void) sacomparam(tp, &t); 586 tp->t_iflag = TTYDEF_IFLAG; 587 tp->t_oflag = TTYDEF_OFLAG; 588 tp->t_lflag = TTYDEF_LFLAG; 589 ttychars(tp); 590 ttsetwater(tp); 591 592 s2 = splserial(); 593 COM_LOCK(sc); 594 595 /* 596 * Turn on DTR. We must always do this, even if carrier is not 597 * present, because otherwise we'd have to use TIOCSDTR 598 * immediately after setting CLOCAL, which applications do not 599 * expect. We always assert DTR while the device is open 600 * unless explicitly requested to deassert it. 601 */ 602 sacom_modem(sc, 1); 603 604 /* Clear the input ring, and unblock. */ 605 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 606 sc->sc_rbavail = SACOM_RING_SIZE; 607 sacom_iflush(sc); 608 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 609 sacom_hwiflow(sc); 610 611 #ifdef COM_DEBUG 612 if (sacom_debug) 613 comstatus(sc, "sacomopen "); 614 #endif 615 616 COM_UNLOCK(sc); 617 splx(s2); 618 } 619 620 splx(s); 621 622 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 623 if (error) 624 goto bad; 625 626 error = (*tp->t_linesw->l_open)(dev, tp); 627 if (error) 628 goto bad; 629 630 return 0; 631 632 bad: 633 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 634 /* 635 * We failed to open the device, and nobody else had it opened. 636 * Clean up the state as appropriate. 637 */ 638 sacom_shutdown(sc); 639 } 640 641 return error; 642 } 643 644 int 645 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 646 { 647 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 648 struct tty *tp = sc->sc_tty; 649 650 /* XXX This is for cons.c. */ 651 if (!ISSET(tp->t_state, TS_ISOPEN)) 652 return 0; 653 654 (*tp->t_linesw->l_close)(tp, flag); 655 ttyclose(tp); 656 657 if (COM_ISALIVE(sc) == 0) 658 return 0; 659 660 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 661 /* 662 * Although we got a last close, the device may still be in 663 * use; e.g. if this was the dialout node, and there are still 664 * processes waiting for carrier on the non-dialout node. 665 */ 666 sacom_shutdown(sc); 667 } 668 669 return 0; 670 } 671 672 int 673 sacomread(dev_t dev, struct uio *uio, int flag) 674 { 675 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 676 struct tty *tp = sc->sc_tty; 677 678 if (COM_ISALIVE(sc) == 0) 679 return EIO; 680 681 return (*tp->t_linesw->l_read)(tp, uio, flag); 682 } 683 684 int 685 sacomwrite(dev_t dev, struct uio *uio, int flag) 686 { 687 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 688 struct tty *tp = sc->sc_tty; 689 690 if (COM_ISALIVE(sc) == 0) 691 return EIO; 692 693 return (*tp->t_linesw->l_write)(tp, uio, flag); 694 } 695 696 int 697 sacompoll(dev_t dev, int events, struct lwp *l) 698 { 699 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 700 struct tty *tp = sc->sc_tty; 701 702 if (COM_ISALIVE(sc) == 0) 703 return EIO; 704 705 return (*tp->t_linesw->l_poll)(tp, events, l); 706 } 707 708 struct tty * 709 sacomtty(dev_t dev) 710 { 711 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 712 struct tty *tp = sc->sc_tty; 713 714 return tp; 715 } 716 717 int 718 sacomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 719 { 720 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 721 struct tty *tp = sc->sc_tty; 722 int error; 723 int s; 724 725 if (COM_ISALIVE(sc) == 0) 726 return EIO; 727 728 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 729 if (error != EPASSTHROUGH) 730 return error; 731 732 error = ttioctl(tp, cmd, data, flag, l); 733 if (error != EPASSTHROUGH) 734 return error; 735 736 error = 0; 737 738 s = splserial(); 739 COM_LOCK(sc); 740 741 switch (cmd) { 742 case TIOCSBRK: 743 sacom_break(sc, 1); 744 break; 745 746 case TIOCCBRK: 747 sacom_break(sc, 0); 748 break; 749 750 case TIOCSDTR: 751 sacom_modem(sc, 1); 752 break; 753 754 case TIOCCDTR: 755 sacom_modem(sc, 0); 756 break; 757 758 case TIOCGFLAGS: 759 *(int *)data = sc->sc_swflags; 760 break; 761 762 case TIOCSFLAGS: 763 error = kauth_authorize_generic(l->l_cred, 764 KAUTH_GENERIC_ISSUSER, &l->l_acflag); 765 if (error) 766 break; 767 sc->sc_swflags = *(int *)data; 768 break; 769 770 case TIOCMSET: 771 case TIOCMBIS: 772 case TIOCMBIC: 773 tiocm_to_sacom(sc, cmd, *(int *)data); 774 break; 775 776 case TIOCMGET: 777 *(int *)data = sacom_to_tiocm(sc); 778 break; 779 780 default: 781 error = EPASSTHROUGH; 782 break; 783 } 784 785 COM_UNLOCK(sc); 786 splx(s); 787 788 #ifdef COM_DEBUG 789 if (sacom_debug) 790 comstatus(sc, "comioctl "); 791 #endif 792 793 return error; 794 } 795 796 static inline void 797 sacom_schedrx(struct sacom_softc *sc) 798 { 799 800 sc->sc_rx_ready = 1; 801 802 /* Wake up the poller. */ 803 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 804 softintr_schedule(sc->sc_si); 805 #else 806 setsoftserial(); 807 #endif 808 } 809 810 void 811 sacom_break(struct sacom_softc *sc, int onoff) 812 { 813 814 if (onoff) 815 SET(sc->sc_cr3, CR3_BRK); 816 else 817 CLR(sc->sc_cr3, CR3_BRK); 818 819 if (!sc->sc_heldchange) { 820 if (sc->sc_tx_busy) { 821 sc->sc_heldtbc = sc->sc_tbc; 822 sc->sc_tbc = 0; 823 sc->sc_heldchange = 1; 824 } else 825 sacom_loadchannelregs(sc); 826 } 827 } 828 829 void 830 sacom_modem(struct sacom_softc *sc, int onoff) 831 { 832 if (!sc->sc_heldchange) { 833 if (sc->sc_tx_busy) { 834 sc->sc_heldtbc = sc->sc_tbc; 835 sc->sc_tbc = 0; 836 sc->sc_heldchange = 1; 837 } else 838 sacom_loadchannelregs(sc); 839 } 840 } 841 842 void 843 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 844 { 845 } 846 847 int 848 sacom_to_tiocm(struct sacom_softc *sc) 849 { 850 int ttybits = 0; 851 852 if (sc->sc_cr3 != 0) 853 SET(ttybits, TIOCM_LE); 854 855 return ttybits; 856 } 857 858 static u_int 859 cflag2cr0(tcflag_t cflag) 860 { 861 u_int cr0; 862 863 cr0 = (cflag & PARENB) ? CR0_PE : 0; 864 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 865 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 866 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 867 868 return cr0; 869 } 870 871 int 872 sacomparam(struct tty *tp, struct termios *t) 873 { 874 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 875 int ospeed = SACOMSPEED(t->c_ospeed); 876 u_int cr0; 877 int s; 878 879 if (COM_ISALIVE(sc) == 0) 880 return EIO; 881 882 /* Check requested parameters. */ 883 if (ospeed < 0) 884 return EINVAL; 885 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 886 return EINVAL; 887 888 /* 889 * For the console, always force CLOCAL and !HUPCL, so that the port 890 * is always active. 891 */ 892 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 893 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 894 SET(t->c_cflag, CLOCAL); 895 CLR(t->c_cflag, HUPCL); 896 } 897 898 /* 899 * If there were no changes, don't do anything. This avoids dropping 900 * input and improves performance when all we did was frob things like 901 * VMIN and VTIME. 902 */ 903 if (tp->t_ospeed == t->c_ospeed && 904 tp->t_cflag == t->c_cflag) 905 return 0; 906 907 cr0 = cflag2cr0(t->c_cflag); 908 909 s = splserial(); 910 COM_LOCK(sc); 911 912 sc->sc_cr0 = cr0; 913 914 sc->sc_speed = ospeed; 915 916 /* And copy to tty. */ 917 tp->t_ispeed = 0; 918 tp->t_ospeed = t->c_ospeed; 919 tp->t_cflag = t->c_cflag; 920 921 if (!sc->sc_heldchange) { 922 if (sc->sc_tx_busy) { 923 sc->sc_heldtbc = sc->sc_tbc; 924 sc->sc_tbc = 0; 925 sc->sc_heldchange = 1; 926 } else 927 sacom_loadchannelregs(sc); 928 } 929 930 if (!ISSET(t->c_cflag, CHWFLOW)) { 931 /* Disable the high water mark. */ 932 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 933 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 934 sacom_schedrx(sc); 935 } 936 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 937 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 938 sacom_hwiflow(sc); 939 } 940 } 941 942 COM_UNLOCK(sc); 943 splx(s); 944 945 (void) (*tp->t_linesw->l_modem)(tp, 1); 946 947 #ifdef COM_DEBUG 948 if (sacom_debug) 949 comstatus(sc, "comparam "); 950 #endif 951 952 return 0; 953 } 954 955 void 956 sacom_iflush(struct sacom_softc *sc) 957 { 958 bus_space_tag_t iot = sc->sc_iot; 959 bus_space_handle_t ioh = sc->sc_ioh; 960 #ifdef DIAGNOSTIC 961 int reg; 962 #endif 963 int timo; 964 965 #ifdef DIAGNOSTIC 966 reg = 0xffff; 967 #endif 968 timo = 50; 969 /* flush any pending I/O */ 970 if (sc->sc_cr3 & CR3_RXE) { 971 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 972 && --timo) 973 #ifdef DIAGNOSTIC 974 reg = 975 #else 976 (void) 977 #endif 978 bus_space_read_4(iot, ioh, SACOM_DR); 979 } 980 #if 0 981 /* XXX is it good idea to wait TX finish? */ 982 if (sc->sc_cr3 & CR3_TXE) { 983 timo = 500; 984 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 985 && --timo) 986 delay(100); 987 } 988 #endif 989 #ifdef DIAGNOSTIC 990 if (!timo) 991 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 992 reg); 993 #endif 994 } 995 996 void 997 sacom_loadchannelregs(struct sacom_softc *sc) 998 { 999 bus_space_tag_t iot = sc->sc_iot; 1000 bus_space_handle_t ioh = sc->sc_ioh; 1001 1002 /* XXXXX necessary? */ 1003 sacom_iflush(sc); 1004 1005 /* Need to stop engines first. */ 1006 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1007 1008 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1009 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1010 1011 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1012 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1013 } 1014 1015 int 1016 sacomhwiflow(struct tty *tp, int block) 1017 { 1018 #if 0 1019 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1020 int s; 1021 1022 if (COM_ISALIVE(sc) == 0) 1023 return 0; 1024 1025 if (sc->sc_mcr_rts == 0) 1026 return 0; 1027 1028 s = splserial(); 1029 COM_LOCK(sc); 1030 1031 if (block) { 1032 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1033 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1034 sacom_hwiflow(sc); 1035 } 1036 } else { 1037 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1038 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1039 sacom_schedrx(sc); 1040 } 1041 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1042 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1043 sacom_hwiflow(sc); 1044 } 1045 } 1046 1047 COM_UNLOCK(sc); 1048 splx(s); 1049 #endif 1050 return 1; 1051 } 1052 1053 /* 1054 * (un)block input via hw flowcontrol 1055 */ 1056 void 1057 sacom_hwiflow(struct sacom_softc *sc) 1058 { 1059 #if 0 1060 bus_space_tag_t iot = sc->sc_iot; 1061 bus_space_handle_t ioh = sc->sc_ioh; 1062 1063 /* XXX implement */ 1064 #endif 1065 } 1066 1067 1068 void 1069 sacomstart(struct tty *tp) 1070 { 1071 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1072 bus_space_tag_t iot = sc->sc_iot; 1073 bus_space_handle_t ioh = sc->sc_ioh; 1074 int s; 1075 1076 if (COM_ISALIVE(sc) == 0) 1077 return; 1078 1079 s = spltty(); 1080 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1081 goto out; 1082 1083 if (tp->t_outq.c_cc <= tp->t_lowat) { 1084 if (ISSET(tp->t_state, TS_ASLEEP)) { 1085 CLR(tp->t_state, TS_ASLEEP); 1086 wakeup(&tp->t_outq); 1087 } 1088 selwakeup(&tp->t_wsel); 1089 if (tp->t_outq.c_cc == 0) 1090 goto out; 1091 } 1092 1093 /* Grab the first contiguous region of buffer space. */ 1094 { 1095 u_char *tba; 1096 int tbc; 1097 1098 tba = tp->t_outq.c_cf; 1099 tbc = ndqb(&tp->t_outq, 0); 1100 1101 (void)splserial(); 1102 COM_LOCK(sc); 1103 1104 sc->sc_tba = tba; 1105 sc->sc_tbc = tbc; 1106 } 1107 1108 SET(tp->t_state, TS_BUSY); 1109 sc->sc_tx_busy = 1; 1110 1111 /* Enable transmit completion interrupts if necessary. */ 1112 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1113 SET(sc->sc_cr3, CR3_TIE); 1114 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1115 } 1116 1117 /* Output the first chunk of the contiguous buffer. */ 1118 sacom_filltx(sc); 1119 1120 COM_UNLOCK(sc); 1121 out: 1122 splx(s); 1123 return; 1124 } 1125 1126 void 1127 sacom_filltx(struct sacom_softc *sc) 1128 { 1129 bus_space_tag_t iot = sc->sc_iot; 1130 bus_space_handle_t ioh = sc->sc_ioh; 1131 int c, n; 1132 1133 n = 0; 1134 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1135 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1136 break; 1137 c = *(sc->sc_tba + n); 1138 c &= 0xff; 1139 bus_space_write_4(iot, ioh, SACOM_DR, c); 1140 n++; 1141 } 1142 sc->sc_tbc -= n; 1143 sc->sc_tba += n; 1144 } 1145 1146 /* 1147 * Stop output on a line. 1148 */ 1149 void 1150 sacomstop(struct tty *tp, int flag) 1151 { 1152 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1153 int s; 1154 1155 s = splserial(); 1156 COM_LOCK(sc); 1157 if (ISSET(tp->t_state, TS_BUSY)) { 1158 /* Stop transmitting at the next chunk. */ 1159 sc->sc_tbc = 0; 1160 sc->sc_heldtbc = 0; 1161 if (!ISSET(tp->t_state, TS_TTSTOP)) 1162 SET(tp->t_state, TS_FLUSH); 1163 } 1164 COM_UNLOCK(sc); 1165 splx(s); 1166 } 1167 1168 static inline void 1169 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1170 { 1171 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1172 u_char *get, *end; 1173 u_int cc, scc; 1174 u_char sr1; 1175 int code; 1176 int s; 1177 1178 end = sc->sc_ebuf; 1179 get = sc->sc_rbget; 1180 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1181 1182 while (cc) { 1183 code = get[0]; 1184 sr1 = get[1]; 1185 if (ISSET(sr1, SR1_FRE)) 1186 SET(code, TTY_FE); 1187 if (ISSET(sr1, SR1_PRE)) 1188 SET(code, TTY_PE); 1189 if ((*rint)(code, tp) == -1) { 1190 /* 1191 * The line discipline's buffer is out of space. 1192 */ 1193 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1194 /* 1195 * We're either not using flow control, or the 1196 * line discipline didn't tell us to block for 1197 * some reason. Either way, we have no way to 1198 * know when there's more space available, so 1199 * just drop the rest of the data. 1200 */ 1201 get += cc << 1; 1202 if (get >= end) 1203 get -= SACOM_RING_SIZE << 1; 1204 cc = 0; 1205 } else { 1206 /* 1207 * Don't schedule any more receive processing 1208 * until the line discipline tells us there's 1209 * space available (through comhwiflow()). 1210 * Leave the rest of the data in the input 1211 * buffer. 1212 */ 1213 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1214 } 1215 break; 1216 } 1217 get += 2; 1218 if (get >= end) 1219 get = sc->sc_rbuf; 1220 cc--; 1221 } 1222 1223 if (cc != scc) { 1224 sc->sc_rbget = get; 1225 s = splserial(); 1226 COM_LOCK(sc); 1227 1228 cc = sc->sc_rbavail += scc - cc; 1229 /* Buffers should be ok again, release possible block. */ 1230 if (cc >= 1) { 1231 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1232 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1233 SET(sc->sc_cr3, CR3_RIE); 1234 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1235 SACOM_CR3, sc->sc_cr3); 1236 } 1237 } 1238 COM_UNLOCK(sc); 1239 splx(s); 1240 } 1241 } 1242 1243 static inline void 1244 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1245 { 1246 1247 CLR(tp->t_state, TS_BUSY); 1248 if (ISSET(tp->t_state, TS_FLUSH)) 1249 CLR(tp->t_state, TS_FLUSH); 1250 else 1251 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1252 (*tp->t_linesw->l_start)(tp); 1253 } 1254 1255 static inline void 1256 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1257 { 1258 } 1259 1260 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1261 void 1262 sacomsoft(void *arg) 1263 { 1264 struct sacom_softc *sc = arg; 1265 struct tty *tp; 1266 1267 if (COM_ISALIVE(sc) == 0) 1268 return; 1269 1270 { 1271 #else 1272 void 1273 sacomsoft(void) 1274 { 1275 struct sacom_softc *sc; 1276 struct tty *tp; 1277 int unit; 1278 1279 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1280 sc = device_lookup(&sacom_cd, unit); 1281 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1282 continue; 1283 1284 if (COM_ISALIVE(sc) == 0) 1285 continue; 1286 1287 tp = sc->sc_tty; 1288 if (tp == NULL) 1289 continue; 1290 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1291 continue; 1292 #endif 1293 tp = sc->sc_tty; 1294 1295 if (sc->sc_rx_ready) { 1296 sc->sc_rx_ready = 0; 1297 sacom_rxsoft(sc, tp); 1298 } 1299 1300 if (sc->sc_st_check) { 1301 sc->sc_st_check = 0; 1302 sacom_stsoft(sc, tp); 1303 } 1304 1305 if (sc->sc_tx_done) { 1306 sc->sc_tx_done = 0; 1307 sacom_txsoft(sc, tp); 1308 } 1309 } 1310 1311 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1312 #endif 1313 } 1314 1315 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1316 /* there has got to be a better way to do comsoft() */ 1317 }} 1318 #endif 1319 1320 int 1321 sacomintr(void *arg) 1322 { 1323 struct sacom_softc *sc = arg; 1324 bus_space_tag_t iot = sc->sc_iot; 1325 bus_space_handle_t ioh = sc->sc_ioh; 1326 u_char *put, *end; 1327 u_int cc; 1328 u_int sr0, sr1; 1329 1330 if (COM_ISALIVE(sc) == 0) 1331 return 0; 1332 1333 COM_LOCK(sc); 1334 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1335 if (!sr0) { 1336 COM_UNLOCK(sc); 1337 return 0; 1338 } 1339 if (ISSET(sr0, SR0_EIF)) 1340 /* XXX silently discard error bits */ 1341 bus_space_read_4(iot, ioh, SACOM_DR); 1342 if (ISSET(sr0, SR0_RBB)) 1343 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1344 if (ISSET(sr0, SR0_REB)) { 1345 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1346 #if defined(DDB) || defined(KGDB) 1347 #ifndef DDB_BREAK_CHAR 1348 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1349 console_debugger(); 1350 } 1351 #endif 1352 #endif /* DDB || KGDB */ 1353 } 1354 1355 1356 end = sc->sc_ebuf; 1357 put = sc->sc_rbput; 1358 cc = sc->sc_rbavail; 1359 1360 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1361 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1362 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1363 while (cc > 0) { 1364 if (!ISSET(sr1, SR1_RNE)) { 1365 bus_space_write_4(iot, ioh, SACOM_SR0, 1366 SR0_RID); 1367 break; 1368 } 1369 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1370 put[1] = sr1; 1371 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1372 if (put[0] == DDB_BREAK_CHAR && 1373 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1374 console_debugger(); 1375 1376 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1377 continue; 1378 } 1379 #endif 1380 put += 2; 1381 if (put >= end) 1382 put = sc->sc_rbuf; 1383 cc--; 1384 1385 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1386 } 1387 1388 /* 1389 * Current string of incoming characters ended because 1390 * no more data was available or we ran out of space. 1391 * Schedule a receive event if any data was received. 1392 * If we're out of space, turn off receive interrupts. 1393 */ 1394 sc->sc_rbput = put; 1395 sc->sc_rbavail = cc; 1396 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1397 sc->sc_rx_ready = 1; 1398 1399 /* XXX do RX hardware flow control */ 1400 1401 /* 1402 * If we're out of space, disable receive interrupts 1403 * until the queue has drained a bit. 1404 */ 1405 if (!cc) { 1406 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1407 CLR(sc->sc_cr3, CR3_RIE); 1408 bus_space_write_4(iot, ioh, SACOM_CR3, 1409 sc->sc_cr3); 1410 } 1411 } else { 1412 #ifdef DIAGNOSTIC 1413 panic("sacomintr: we shouldn't reach here"); 1414 #endif 1415 CLR(sc->sc_cr3, CR3_RIE); 1416 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1417 } 1418 } 1419 1420 /* 1421 * Done handling any receive interrupts. See if data can be 1422 * transmitted as well. Schedule tx done event if no data left 1423 * and tty was marked busy. 1424 */ 1425 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1426 if (ISSET(sr0, SR0_TFS)) { 1427 /* 1428 * If we've delayed a parameter change, do it now, and restart 1429 * output. 1430 * XXX sacom_loadchannelregs() waits TX completion, 1431 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1432 */ 1433 if (sc->sc_heldchange) { 1434 sacom_loadchannelregs(sc); 1435 sc->sc_heldchange = 0; 1436 sc->sc_tbc = sc->sc_heldtbc; 1437 sc->sc_heldtbc = 0; 1438 } 1439 1440 /* Output the next chunk of the contiguous buffer, if any. */ 1441 if (sc->sc_tbc > 0) { 1442 sacom_filltx(sc); 1443 } else { 1444 /* Disable transmit completion interrupts if necessary. */ 1445 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1446 CLR(sc->sc_cr3, CR3_TIE); 1447 bus_space_write_4(iot, ioh, SACOM_CR3, 1448 sc->sc_cr3); 1449 } 1450 if (sc->sc_tx_busy) { 1451 sc->sc_tx_busy = 0; 1452 sc->sc_tx_done = 1; 1453 } 1454 } 1455 } 1456 COM_UNLOCK(sc); 1457 1458 /* Wake up the poller. */ 1459 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1460 softintr_schedule(sc->sc_si); 1461 #else 1462 setsoftserial(); 1463 #endif 1464 1465 #if NRND > 0 && defined(RND_COM) 1466 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1467 #endif 1468 return 1; 1469 } 1470 1471 static void 1472 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1473 1474 /* XXX this should be done at sc->enable function */ 1475 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1476 SAGPIO_PCR, 0xa0000); 1477 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1478 SAGPIO_PSR, 0x100); 1479 } 1480 1481 /* Initialization for serial console */ 1482 int 1483 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1484 bus_space_handle_t *iohp) 1485 { 1486 int brd, cr0; 1487 1488 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1489 printf("register map failed\n"); 1490 1491 /* wait for the Tx queue to drain and disable the UART */ 1492 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1493 continue; 1494 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1495 1496 cr0 = cflag2cr0(cflag); 1497 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1498 1499 brd = SACOMSPEED(baud); 1500 sacomconsrate = baud; 1501 sacomconsaddr = iobase; 1502 sacomconscflag = cflag; 1503 /* XXX assumes little endian */ 1504 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1505 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1506 1507 /* enable the UART */ 1508 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1509 1510 return 0; 1511 } 1512 1513 void 1514 sacomcnprobe(struct consdev *cp) 1515 { 1516 cp->cn_pri = CN_REMOTE; 1517 } 1518 1519 void 1520 sacomcninit(struct consdev *cp) 1521 { 1522 if (cp == NULL) { 1523 /* XXX cp == NULL means that MMU is disabled. */ 1524 sacomconsioh = SACOM3_BASE; 1525 sacomconstag = &sa11x0_bs_tag; 1526 cn_tab = &sacomcons; 1527 return; 1528 } 1529 1530 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1531 CONMODE, &sacomconsioh)) 1532 panic("can't init serial console @%x", CONADDR); 1533 cn_tab = &sacomcons; 1534 sacomconstag = &sa11x0_bs_tag; 1535 } 1536 1537 int 1538 sacomcngetc(dev_t dev) 1539 { 1540 int c, s; 1541 1542 s = spltty(); /* XXX do we need this? */ 1543 1544 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1545 & SR1_RNE)) { 1546 #if defined(DDB) || defined(KGDB) 1547 #ifndef DDB_BREAK_CHAR 1548 u_int sr0; 1549 extern int db_active; 1550 1551 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1552 if (ISSET(sr0, SR0_RBB)) 1553 bus_space_write_4(sacomconstag, sacomconsioh, 1554 SACOM_SR0, SR0_RBB); 1555 if (ISSET(sr0, SR0_REB)) { 1556 bus_space_write_4(sacomconstag, sacomconsioh, 1557 SACOM_SR0, SR0_REB); 1558 if (db_active == 0) 1559 console_debugger(); 1560 } 1561 #endif 1562 #endif /* DDB || KGDB */ 1563 } 1564 1565 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1566 c &= 0xff; 1567 splx(s); 1568 1569 return c; 1570 } 1571 1572 void 1573 sacomcnputc(dev_t dev, int c) 1574 { 1575 int s; 1576 1577 s = spltty(); /* XXX do we need this? */ 1578 1579 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1580 & SR1_TNF)) 1581 continue; 1582 1583 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1584 splx(s); 1585 } 1586 1587 void 1588 sacomcnpollc(dev_t dev, int on) 1589 { 1590 1591 } 1592 1593 #if 0 1594 #ifdef DEBUG 1595 int 1596 sacomcncharpoll(void) 1597 { 1598 int c; 1599 1600 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1601 & SR1_RNE)) 1602 return -1; 1603 1604 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1605 c &= 0xff; 1606 1607 return c; 1608 } 1609 #endif 1610 #endif 1611 1612 /* helper function to identify the com ports used by 1613 console or KGDB (and not yet autoconf attached) */ 1614 int 1615 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1616 bus_space_handle_t *ioh) 1617 { 1618 bus_space_handle_t help; 1619 1620 if (!sacomconsattached && 1621 iot == sacomconstag && iobase == sacomconsaddr) 1622 help = sacomconsioh; 1623 else 1624 return 0; 1625 1626 if (ioh) 1627 *ioh = help; 1628 return 1; 1629 } 1630
Indexes created Fri Oct 03 02:09:57 GMT 2025