sa11x0_com.c revision 1.34
1 /* $NetBSD: sa11x0_com.c,v 1.34 2006/06/27 13:58:08 peter 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 1.34 2006/06/27 13:58:08 peter 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_proc->p_cred, KAUTH_GENERIC_ISSUSER, 527 &l->l_proc->p_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_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag); 764 if (error) 765 break; 766 sc->sc_swflags = *(int *)data; 767 break; 768 769 case TIOCMSET: 770 case TIOCMBIS: 771 case TIOCMBIC: 772 tiocm_to_sacom(sc, cmd, *(int *)data); 773 break; 774 775 case TIOCMGET: 776 *(int *)data = sacom_to_tiocm(sc); 777 break; 778 779 default: 780 error = EPASSTHROUGH; 781 break; 782 } 783 784 COM_UNLOCK(sc); 785 splx(s); 786 787 #ifdef COM_DEBUG 788 if (sacom_debug) 789 comstatus(sc, "comioctl "); 790 #endif 791 792 return error; 793 } 794 795 static inline void 796 sacom_schedrx(struct sacom_softc *sc) 797 { 798 799 sc->sc_rx_ready = 1; 800 801 /* Wake up the poller. */ 802 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 803 softintr_schedule(sc->sc_si); 804 #else 805 setsoftserial(); 806 #endif 807 } 808 809 void 810 sacom_break(struct sacom_softc *sc, int onoff) 811 { 812 813 if (onoff) 814 SET(sc->sc_cr3, CR3_BRK); 815 else 816 CLR(sc->sc_cr3, CR3_BRK); 817 818 if (!sc->sc_heldchange) { 819 if (sc->sc_tx_busy) { 820 sc->sc_heldtbc = sc->sc_tbc; 821 sc->sc_tbc = 0; 822 sc->sc_heldchange = 1; 823 } else 824 sacom_loadchannelregs(sc); 825 } 826 } 827 828 void 829 sacom_modem(struct sacom_softc *sc, int onoff) 830 { 831 if (!sc->sc_heldchange) { 832 if (sc->sc_tx_busy) { 833 sc->sc_heldtbc = sc->sc_tbc; 834 sc->sc_tbc = 0; 835 sc->sc_heldchange = 1; 836 } else 837 sacom_loadchannelregs(sc); 838 } 839 } 840 841 void 842 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 843 { 844 } 845 846 int 847 sacom_to_tiocm(struct sacom_softc *sc) 848 { 849 int ttybits = 0; 850 851 if (sc->sc_cr3 != 0) 852 SET(ttybits, TIOCM_LE); 853 854 return ttybits; 855 } 856 857 static u_int 858 cflag2cr0(tcflag_t cflag) 859 { 860 u_int cr0; 861 862 cr0 = (cflag & PARENB) ? CR0_PE : 0; 863 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 864 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 865 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 866 867 return cr0; 868 } 869 870 int 871 sacomparam(struct tty *tp, struct termios *t) 872 { 873 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 874 int ospeed = SACOMSPEED(t->c_ospeed); 875 u_int cr0; 876 int s; 877 878 if (COM_ISALIVE(sc) == 0) 879 return EIO; 880 881 /* Check requested parameters. */ 882 if (ospeed < 0) 883 return EINVAL; 884 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 885 return EINVAL; 886 887 /* 888 * For the console, always force CLOCAL and !HUPCL, so that the port 889 * is always active. 890 */ 891 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 892 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 893 SET(t->c_cflag, CLOCAL); 894 CLR(t->c_cflag, HUPCL); 895 } 896 897 /* 898 * If there were no changes, don't do anything. This avoids dropping 899 * input and improves performance when all we did was frob things like 900 * VMIN and VTIME. 901 */ 902 if (tp->t_ospeed == t->c_ospeed && 903 tp->t_cflag == t->c_cflag) 904 return 0; 905 906 cr0 = cflag2cr0(t->c_cflag); 907 908 s = splserial(); 909 COM_LOCK(sc); 910 911 sc->sc_cr0 = cr0; 912 913 sc->sc_speed = ospeed; 914 915 /* And copy to tty. */ 916 tp->t_ispeed = 0; 917 tp->t_ospeed = t->c_ospeed; 918 tp->t_cflag = t->c_cflag; 919 920 if (!sc->sc_heldchange) { 921 if (sc->sc_tx_busy) { 922 sc->sc_heldtbc = sc->sc_tbc; 923 sc->sc_tbc = 0; 924 sc->sc_heldchange = 1; 925 } else 926 sacom_loadchannelregs(sc); 927 } 928 929 if (!ISSET(t->c_cflag, CHWFLOW)) { 930 /* Disable the high water mark. */ 931 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 932 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 933 sacom_schedrx(sc); 934 } 935 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 936 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 937 sacom_hwiflow(sc); 938 } 939 } 940 941 COM_UNLOCK(sc); 942 splx(s); 943 944 (void) (*tp->t_linesw->l_modem)(tp, 1); 945 946 #ifdef COM_DEBUG 947 if (sacom_debug) 948 comstatus(sc, "comparam "); 949 #endif 950 951 return 0; 952 } 953 954 void 955 sacom_iflush(struct sacom_softc *sc) 956 { 957 bus_space_tag_t iot = sc->sc_iot; 958 bus_space_handle_t ioh = sc->sc_ioh; 959 #ifdef DIAGNOSTIC 960 int reg; 961 #endif 962 int timo; 963 964 #ifdef DIAGNOSTIC 965 reg = 0xffff; 966 #endif 967 timo = 50; 968 /* flush any pending I/O */ 969 if (sc->sc_cr3 & CR3_RXE) { 970 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 971 && --timo) 972 #ifdef DIAGNOSTIC 973 reg = 974 #else 975 (void) 976 #endif 977 bus_space_read_4(iot, ioh, SACOM_DR); 978 } 979 #if 0 980 /* XXX is it good idea to wait TX finish? */ 981 if (sc->sc_cr3 & CR3_TXE) { 982 timo = 500; 983 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 984 && --timo) 985 delay(100); 986 } 987 #endif 988 #ifdef DIAGNOSTIC 989 if (!timo) 990 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 991 reg); 992 #endif 993 } 994 995 void 996 sacom_loadchannelregs(struct sacom_softc *sc) 997 { 998 bus_space_tag_t iot = sc->sc_iot; 999 bus_space_handle_t ioh = sc->sc_ioh; 1000 1001 /* XXXXX necessary? */ 1002 sacom_iflush(sc); 1003 1004 /* Need to stop engines first. */ 1005 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1006 1007 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1008 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1009 1010 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1011 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1012 } 1013 1014 int 1015 sacomhwiflow(struct tty *tp, int block) 1016 { 1017 #if 0 1018 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1019 int s; 1020 1021 if (COM_ISALIVE(sc) == 0) 1022 return 0; 1023 1024 if (sc->sc_mcr_rts == 0) 1025 return 0; 1026 1027 s = splserial(); 1028 COM_LOCK(sc); 1029 1030 if (block) { 1031 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1032 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1033 sacom_hwiflow(sc); 1034 } 1035 } else { 1036 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1037 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1038 sacom_schedrx(sc); 1039 } 1040 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1041 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1042 sacom_hwiflow(sc); 1043 } 1044 } 1045 1046 COM_UNLOCK(sc); 1047 splx(s); 1048 #endif 1049 return 1; 1050 } 1051 1052 /* 1053 * (un)block input via hw flowcontrol 1054 */ 1055 void 1056 sacom_hwiflow(struct sacom_softc *sc) 1057 { 1058 #if 0 1059 bus_space_tag_t iot = sc->sc_iot; 1060 bus_space_handle_t ioh = sc->sc_ioh; 1061 1062 /* XXX implement */ 1063 #endif 1064 } 1065 1066 1067 void 1068 sacomstart(struct tty *tp) 1069 { 1070 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1071 bus_space_tag_t iot = sc->sc_iot; 1072 bus_space_handle_t ioh = sc->sc_ioh; 1073 int s; 1074 1075 if (COM_ISALIVE(sc) == 0) 1076 return; 1077 1078 s = spltty(); 1079 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1080 goto out; 1081 1082 if (tp->t_outq.c_cc <= tp->t_lowat) { 1083 if (ISSET(tp->t_state, TS_ASLEEP)) { 1084 CLR(tp->t_state, TS_ASLEEP); 1085 wakeup(&tp->t_outq); 1086 } 1087 selwakeup(&tp->t_wsel); 1088 if (tp->t_outq.c_cc == 0) 1089 goto out; 1090 } 1091 1092 /* Grab the first contiguous region of buffer space. */ 1093 { 1094 u_char *tba; 1095 int tbc; 1096 1097 tba = tp->t_outq.c_cf; 1098 tbc = ndqb(&tp->t_outq, 0); 1099 1100 (void)splserial(); 1101 COM_LOCK(sc); 1102 1103 sc->sc_tba = tba; 1104 sc->sc_tbc = tbc; 1105 } 1106 1107 SET(tp->t_state, TS_BUSY); 1108 sc->sc_tx_busy = 1; 1109 1110 /* Enable transmit completion interrupts if necessary. */ 1111 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1112 SET(sc->sc_cr3, CR3_TIE); 1113 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1114 } 1115 1116 /* Output the first chunk of the contiguous buffer. */ 1117 sacom_filltx(sc); 1118 1119 COM_UNLOCK(sc); 1120 out: 1121 splx(s); 1122 return; 1123 } 1124 1125 void 1126 sacom_filltx(struct sacom_softc *sc) 1127 { 1128 bus_space_tag_t iot = sc->sc_iot; 1129 bus_space_handle_t ioh = sc->sc_ioh; 1130 int c, n; 1131 1132 n = 0; 1133 while (bus_space_read_4(iot, ioh, SACOM_SR1) & SR1_TNF) { 1134 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1135 break; 1136 c = *(sc->sc_tba + n); 1137 c &= 0xff; 1138 bus_space_write_4(iot, ioh, SACOM_DR, c); 1139 n++; 1140 } 1141 sc->sc_tbc -= n; 1142 sc->sc_tba += n; 1143 } 1144 1145 /* 1146 * Stop output on a line. 1147 */ 1148 void 1149 sacomstop(struct tty *tp, int flag) 1150 { 1151 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1152 int s; 1153 1154 s = splserial(); 1155 COM_LOCK(sc); 1156 if (ISSET(tp->t_state, TS_BUSY)) { 1157 /* Stop transmitting at the next chunk. */ 1158 sc->sc_tbc = 0; 1159 sc->sc_heldtbc = 0; 1160 if (!ISSET(tp->t_state, TS_TTSTOP)) 1161 SET(tp->t_state, TS_FLUSH); 1162 } 1163 COM_UNLOCK(sc); 1164 splx(s); 1165 } 1166 1167 static inline void 1168 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1169 { 1170 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1171 u_char *get, *end; 1172 u_int cc, scc; 1173 u_char sr1; 1174 int code; 1175 int s; 1176 1177 end = sc->sc_ebuf; 1178 get = sc->sc_rbget; 1179 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1180 1181 while (cc) { 1182 code = get[0]; 1183 sr1 = get[1]; 1184 if (ISSET(sr1, SR1_FRE)) 1185 SET(code, TTY_FE); 1186 if (ISSET(sr1, SR1_PRE)) 1187 SET(code, TTY_PE); 1188 if ((*rint)(code, tp) == -1) { 1189 /* 1190 * The line discipline's buffer is out of space. 1191 */ 1192 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1193 /* 1194 * We're either not using flow control, or the 1195 * line discipline didn't tell us to block for 1196 * some reason. Either way, we have no way to 1197 * know when there's more space available, so 1198 * just drop the rest of the data. 1199 */ 1200 get += cc << 1; 1201 if (get >= end) 1202 get -= SACOM_RING_SIZE << 1; 1203 cc = 0; 1204 } else { 1205 /* 1206 * Don't schedule any more receive processing 1207 * until the line discipline tells us there's 1208 * space available (through comhwiflow()). 1209 * Leave the rest of the data in the input 1210 * buffer. 1211 */ 1212 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1213 } 1214 break; 1215 } 1216 get += 2; 1217 if (get >= end) 1218 get = sc->sc_rbuf; 1219 cc--; 1220 } 1221 1222 if (cc != scc) { 1223 sc->sc_rbget = get; 1224 s = splserial(); 1225 COM_LOCK(sc); 1226 1227 cc = sc->sc_rbavail += scc - cc; 1228 /* Buffers should be ok again, release possible block. */ 1229 if (cc >= 1) { 1230 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1231 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1232 SET(sc->sc_cr3, CR3_RIE); 1233 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1234 SACOM_CR3, sc->sc_cr3); 1235 } 1236 } 1237 COM_UNLOCK(sc); 1238 splx(s); 1239 } 1240 } 1241 1242 static inline void 1243 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1244 { 1245 1246 CLR(tp->t_state, TS_BUSY); 1247 if (ISSET(tp->t_state, TS_FLUSH)) 1248 CLR(tp->t_state, TS_FLUSH); 1249 else 1250 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1251 (*tp->t_linesw->l_start)(tp); 1252 } 1253 1254 static inline void 1255 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1256 { 1257 } 1258 1259 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1260 void 1261 sacomsoft(void *arg) 1262 { 1263 struct sacom_softc *sc = arg; 1264 struct tty *tp; 1265 1266 if (COM_ISALIVE(sc) == 0) 1267 return; 1268 1269 { 1270 #else 1271 void 1272 sacomsoft(void) 1273 { 1274 struct sacom_softc *sc; 1275 struct tty *tp; 1276 int unit; 1277 1278 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1279 sc = device_lookup(&sacom_cd, unit); 1280 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1281 continue; 1282 1283 if (COM_ISALIVE(sc) == 0) 1284 continue; 1285 1286 tp = sc->sc_tty; 1287 if (tp == NULL) 1288 continue; 1289 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1290 continue; 1291 #endif 1292 tp = sc->sc_tty; 1293 1294 if (sc->sc_rx_ready) { 1295 sc->sc_rx_ready = 0; 1296 sacom_rxsoft(sc, tp); 1297 } 1298 1299 if (sc->sc_st_check) { 1300 sc->sc_st_check = 0; 1301 sacom_stsoft(sc, tp); 1302 } 1303 1304 if (sc->sc_tx_done) { 1305 sc->sc_tx_done = 0; 1306 sacom_txsoft(sc, tp); 1307 } 1308 } 1309 1310 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1311 #endif 1312 } 1313 1314 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1315 /* there has got to be a better way to do comsoft() */ 1316 }} 1317 #endif 1318 1319 int 1320 sacomintr(void *arg) 1321 { 1322 struct sacom_softc *sc = arg; 1323 bus_space_tag_t iot = sc->sc_iot; 1324 bus_space_handle_t ioh = sc->sc_ioh; 1325 u_char *put, *end; 1326 u_int cc; 1327 u_int sr0, sr1; 1328 1329 if (COM_ISALIVE(sc) == 0) 1330 return 0; 1331 1332 COM_LOCK(sc); 1333 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1334 if (!sr0) { 1335 COM_UNLOCK(sc); 1336 return 0; 1337 } 1338 if (ISSET(sr0, SR0_EIF)) 1339 /* XXX silently discard error bits */ 1340 bus_space_read_4(iot, ioh, SACOM_DR); 1341 if (ISSET(sr0, SR0_RBB)) 1342 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1343 if (ISSET(sr0, SR0_REB)) { 1344 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1345 #if defined(DDB) || defined(KGDB) 1346 #ifndef DDB_BREAK_CHAR 1347 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1348 console_debugger(); 1349 } 1350 #endif 1351 #endif /* DDB || KGDB */ 1352 } 1353 1354 1355 end = sc->sc_ebuf; 1356 put = sc->sc_rbput; 1357 cc = sc->sc_rbavail; 1358 1359 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1360 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1361 if (!ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1362 while (cc > 0) { 1363 if (!ISSET(sr1, SR1_RNE)) { 1364 bus_space_write_4(iot, ioh, SACOM_SR0, 1365 SR0_RID); 1366 break; 1367 } 1368 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1369 put[1] = sr1; 1370 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1371 if (put[0] == DDB_BREAK_CHAR && 1372 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1373 console_debugger(); 1374 1375 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1376 continue; 1377 } 1378 #endif 1379 put += 2; 1380 if (put >= end) 1381 put = sc->sc_rbuf; 1382 cc--; 1383 1384 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1385 } 1386 1387 /* 1388 * Current string of incoming characters ended because 1389 * no more data was available or we ran out of space. 1390 * Schedule a receive event if any data was received. 1391 * If we're out of space, turn off receive interrupts. 1392 */ 1393 sc->sc_rbput = put; 1394 sc->sc_rbavail = cc; 1395 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1396 sc->sc_rx_ready = 1; 1397 1398 /* XXX do RX hardware flow control */ 1399 1400 /* 1401 * If we're out of space, disable receive interrupts 1402 * until the queue has drained a bit. 1403 */ 1404 if (!cc) { 1405 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1406 CLR(sc->sc_cr3, CR3_RIE); 1407 bus_space_write_4(iot, ioh, SACOM_CR3, 1408 sc->sc_cr3); 1409 } 1410 } else { 1411 #ifdef DIAGNOSTIC 1412 panic("sacomintr: we shouldn't reach here"); 1413 #endif 1414 CLR(sc->sc_cr3, CR3_RIE); 1415 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1416 } 1417 } 1418 1419 /* 1420 * Done handling any receive interrupts. See if data can be 1421 * transmitted as well. Schedule tx done event if no data left 1422 * and tty was marked busy. 1423 */ 1424 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1425 if (ISSET(sr0, SR0_TFS)) { 1426 /* 1427 * If we've delayed a parameter change, do it now, and restart 1428 * output. 1429 * XXX sacom_loadchannelregs() waits TX completion, 1430 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1431 */ 1432 if (sc->sc_heldchange) { 1433 sacom_loadchannelregs(sc); 1434 sc->sc_heldchange = 0; 1435 sc->sc_tbc = sc->sc_heldtbc; 1436 sc->sc_heldtbc = 0; 1437 } 1438 1439 /* Output the next chunk of the contiguous buffer, if any. */ 1440 if (sc->sc_tbc > 0) { 1441 sacom_filltx(sc); 1442 } else { 1443 /* Disable transmit completion interrupts if necessary. */ 1444 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1445 CLR(sc->sc_cr3, CR3_TIE); 1446 bus_space_write_4(iot, ioh, SACOM_CR3, 1447 sc->sc_cr3); 1448 } 1449 if (sc->sc_tx_busy) { 1450 sc->sc_tx_busy = 0; 1451 sc->sc_tx_done = 1; 1452 } 1453 } 1454 } 1455 COM_UNLOCK(sc); 1456 1457 /* Wake up the poller. */ 1458 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1459 softintr_schedule(sc->sc_si); 1460 #else 1461 setsoftserial(); 1462 #endif 1463 1464 #if NRND > 0 && defined(RND_COM) 1465 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1466 #endif 1467 return 1; 1468 } 1469 1470 static void 1471 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1472 1473 /* XXX this should be done at sc->enable function */ 1474 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1475 SAGPIO_PCR, 0xa0000); 1476 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1477 SAGPIO_PSR, 0x100); 1478 } 1479 1480 /* Initialization for serial console */ 1481 int 1482 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1483 bus_space_handle_t *iohp) 1484 { 1485 int brd, cr0; 1486 1487 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1488 printf("register map failed\n"); 1489 1490 /* wait for the Tx queue to drain and disable the UART */ 1491 while (bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1492 continue; 1493 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1494 1495 cr0 = cflag2cr0(cflag); 1496 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1497 1498 brd = SACOMSPEED(baud); 1499 sacomconsrate = baud; 1500 sacomconsaddr = iobase; 1501 sacomconscflag = cflag; 1502 /* XXX assumes little endian */ 1503 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1504 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1505 1506 /* enable the UART */ 1507 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1508 1509 return 0; 1510 } 1511 1512 void 1513 sacomcnprobe(struct consdev *cp) 1514 { 1515 cp->cn_pri = CN_REMOTE; 1516 } 1517 1518 void 1519 sacomcninit(struct consdev *cp) 1520 { 1521 if (cp == NULL) { 1522 /* XXX cp == NULL means that MMU is disabled. */ 1523 sacomconsioh = SACOM3_BASE; 1524 sacomconstag = &sa11x0_bs_tag; 1525 cn_tab = &sacomcons; 1526 return; 1527 } 1528 1529 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1530 CONMODE, &sacomconsioh)) 1531 panic("can't init serial console @%x", CONADDR); 1532 cn_tab = &sacomcons; 1533 sacomconstag = &sa11x0_bs_tag; 1534 } 1535 1536 int 1537 sacomcngetc(dev_t dev) 1538 { 1539 int c, s; 1540 1541 s = spltty(); /* XXX do we need this? */ 1542 1543 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1544 & SR1_RNE)) { 1545 #if defined(DDB) || defined(KGDB) 1546 #ifndef DDB_BREAK_CHAR 1547 u_int sr0; 1548 extern int db_active; 1549 1550 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1551 if (ISSET(sr0, SR0_RBB)) 1552 bus_space_write_4(sacomconstag, sacomconsioh, 1553 SACOM_SR0, SR0_RBB); 1554 if (ISSET(sr0, SR0_REB)) { 1555 bus_space_write_4(sacomconstag, sacomconsioh, 1556 SACOM_SR0, SR0_REB); 1557 if (db_active == 0) 1558 console_debugger(); 1559 } 1560 #endif 1561 #endif /* DDB || KGDB */ 1562 } 1563 1564 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1565 c &= 0xff; 1566 splx(s); 1567 1568 return c; 1569 } 1570 1571 void 1572 sacomcnputc(dev_t dev, int c) 1573 { 1574 int s; 1575 1576 s = spltty(); /* XXX do we need this? */ 1577 1578 while (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1579 & SR1_TNF)) 1580 continue; 1581 1582 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1583 splx(s); 1584 } 1585 1586 void 1587 sacomcnpollc(dev_t dev, int on) 1588 { 1589 1590 } 1591 1592 #if 0 1593 #ifdef DEBUG 1594 int 1595 sacomcncharpoll(void) 1596 { 1597 int c; 1598 1599 if (!(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1600 & SR1_RNE)) 1601 return -1; 1602 1603 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1604 c &= 0xff; 1605 1606 return c; 1607 } 1608 #endif 1609 #endif 1610 1611 /* helper function to identify the com ports used by 1612 console or KGDB (and not yet autoconf attached) */ 1613 int 1614 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1615 bus_space_handle_t *ioh) 1616 { 1617 bus_space_handle_t help; 1618 1619 if (!sacomconsattached && 1620 iot == sacomconstag && iobase == sacomconsaddr) 1621 help = sacomconsioh; 1622 else 1623 return 0; 1624 1625 if (ioh) 1626 *ioh = help; 1627 return 1; 1628 } 1629
Indexes created Wed Oct 29 20:09:47 GMT 2025