sa11x0_com.c revision 1.30
1 /* $NetBSD: sa11x0_com.c,v 1.30 2006/03/26 04:42:50 thorpej 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 1.30 2006/03/26 04:42:50 thorpej 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> 99 100 #include <dev/cons.h> 101 102 #include <machine/bus.h> 103 #include <arm/sa11x0/sa11x0_reg.h> 104 #include <arm/sa11x0/sa11x0_var.h> 105 #include <arm/sa11x0/sa11x0_comreg.h> 106 #include <arm/sa11x0/sa11x0_comvar.h> 107 #include <arm/sa11x0/sa11x0_gpioreg.h> 108 109 #ifdef hpcarm 110 #include <hpc/include/platid.h> 111 #include <hpc/include/platid_mask.h> 112 #endif 113 114 #include "sacom.h" 115 116 dev_type_open(sacomopen); 117 dev_type_close(sacomclose); 118 dev_type_read(sacomread); 119 dev_type_write(sacomwrite); 120 dev_type_ioctl(sacomioctl); 121 dev_type_stop(sacomstop); 122 dev_type_tty(sacomtty); 123 dev_type_poll(sacompoll); 124 125 const struct cdevsw sacom_cdevsw = { 126 sacomopen, sacomclose, sacomread, sacomwrite, sacomioctl, 127 sacomstop, sacomtty, sacompoll, nommap, ttykqfilter, D_TTY 128 }; 129 130 static int sacom_match(struct device *, struct cfdata *, void *); 131 static void sacom_attach(struct device *, struct device *, void *); 132 static void sacom_filltx(struct sacom_softc *); 133 static void sacom_attach_subr(struct sacom_softc *); 134 #if defined(DDB) || defined(KGDB) 135 static void sacom_enable_debugport(struct sacom_softc *); 136 #endif 137 int sacom_detach(struct device *, int); 138 void sacom_config(struct sacom_softc *); 139 int sacom_activate(struct device *, enum devact); 140 void sacom_shutdown(struct sacom_softc *); 141 static u_int cflag2cr0(tcflag_t); 142 int sacomparam(struct tty *, struct termios *); 143 void sacomstart(struct tty *); 144 int sacomhwiflow(struct tty *, int); 145 146 void sacom_loadchannelregs(struct sacom_softc *); 147 void sacom_hwiflow(struct sacom_softc *); 148 void sacom_break(struct sacom_softc *, int); 149 void sacom_modem(struct sacom_softc *, int); 150 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 151 int sacom_to_tiocm(struct sacom_softc *); 152 void sacom_iflush(struct sacom_softc *); 153 154 int sacominit(bus_space_tag_t, bus_addr_t, int, tcflag_t, 155 bus_space_handle_t *); 156 int sacom_is_console(bus_space_tag_t, bus_addr_t, 157 bus_space_handle_t *); 158 159 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 160 void sacomsoft(void *); 161 #else 162 void sacomsoft(void); 163 #endif 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(struct sa11x0_softc *, struct sacom_softc *); 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(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(struct device *parent, struct cfdata *match, void *aux) 234 { 235 return (1); 236 } 237 238 void 239 sacom_attach(struct device *parent, struct device *self, void *aux) 240 { 241 struct sacom_softc *sc = (struct sacom_softc*)self; 242 struct sa11x0_attach_args *sa = aux; 243 244 #ifdef hpcarm 245 struct platid_data *p; 246 void (*mdinit)(struct device *, struct sacom_softc *); 247 #endif 248 249 printf("\n"); 250 251 sc->sc_iot = sa->sa_iot; 252 sc->sc_baseaddr = sa->sa_addr; 253 254 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 255 &sc->sc_ioh)) { 256 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 257 return; 258 } 259 260 printf("%s: ", sc->sc_dev.dv_xname); 261 switch(sc->sc_baseaddr) { 262 case 0x80050000: 263 printf("SA11x0 UART3\n"); 264 break; 265 case 0x80010000: 266 printf("SA11x0 UART1\n"); 267 break; 268 case 0x80030000: 269 printf("SA11x0 UART2 (IRDA)\n"); 270 break; 271 default: 272 printf("unknown SA11x0 UART\n"); 273 break; 274 } 275 276 sacom_attach_subr(sc); 277 278 #ifdef hpcarm 279 /* Do hpcarm specific initialization, if any */ 280 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 281 mdinit = p->data; 282 (mdinit)(parent, sc); 283 } 284 #endif 285 286 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 287 } 288 289 void 290 sacom_attach_subr(struct sacom_softc *sc) 291 { 292 bus_addr_t iobase = sc->sc_baseaddr; 293 bus_space_tag_t iot = sc->sc_iot; 294 struct tty *tp; 295 296 /* XXX Do we need to disable interrupts here? */ 297 298 if (iot == sacomconstag && iobase == sacomconsaddr) { 299 sacomconsattached = 1; 300 sc->sc_speed = SACOMSPEED(sacomconsrate); 301 302 /* Make sure the console is always "hardwired". */ 303 delay(10000); /* wait for output to finish */ 304 SET(sc->sc_hwflags, COM_HW_CONSOLE); 305 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 306 } 307 308 tp = ttymalloc(); 309 tp->t_oproc = sacomstart; 310 tp->t_param = sacomparam; 311 tp->t_hwiflow = sacomhwiflow; 312 313 sc->sc_tty = tp; 314 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 315 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 316 sc->sc_rbavail = SACOM_RING_SIZE; 317 if (sc->sc_rbuf == NULL) { 318 printf("%s: unable to allocate ring buffer\n", 319 sc->sc_dev.dv_xname); 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 printf("%s: console\n", sc->sc_dev.dv_xname); 337 delay(10000); /* XXX */ 338 } 339 340 341 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 342 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 343 #endif 344 345 #if NRND > 0 && defined(RND_COM) 346 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 347 RND_TYPE_TTY, 0); 348 #endif 349 350 /* if there are no enable/disable functions, assume the device 351 is always enabled */ 352 if (!sc->enable) 353 sc->enabled = 1; 354 355 sacom_config(sc); 356 357 SET(sc->sc_hwflags, COM_HW_DEV_OK); 358 } 359 360 /* This is necessary when dynamically changing SAIP configuration. */ 361 int 362 sacom_detach(struct device *self, int flags) 363 { 364 struct sacom_softc *sc = (struct sacom_softc *)self; 365 int maj, mn; 366 367 /* locate the major number */ 368 maj = cdevsw_lookup_major(&sacom_cdevsw); 369 370 /* Nuke the vnodes for any open instances. */ 371 mn = device_unit(self); 372 vdevgone(maj, mn, mn, VCHR); 373 374 mn |= COMDIALOUT_MASK; 375 vdevgone(maj, mn, mn, VCHR); 376 377 /* Free the receive buffer. */ 378 free(sc->sc_rbuf, M_DEVBUF); 379 380 /* Detach and free the tty. */ 381 tty_detach(sc->sc_tty); 382 ttyfree(sc->sc_tty); 383 384 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 385 /* Unhook the soft interrupt handler. */ 386 softintr_disestablish(sc->sc_si); 387 #endif 388 389 #if NRND > 0 && defined(RND_COM) 390 /* Unhook the entropy source. */ 391 rnd_detach_source(&sc->rnd_source); 392 #endif 393 394 return (0); 395 } 396 397 void 398 sacom_config(struct sacom_softc *sc) 399 { 400 bus_space_tag_t iot = sc->sc_iot; 401 bus_space_handle_t ioh = sc->sc_ioh; 402 403 /* Disable engine before configuring the device. */ 404 sc->sc_cr3 = 0; 405 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 406 407 #ifdef DDB 408 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 409 sacom_enable_debugport(sc); 410 #endif 411 } 412 413 #ifdef DDB 414 static void 415 sacom_enable_debugport(struct sacom_softc *sc) 416 { 417 bus_space_tag_t iot = sc->sc_iot; 418 bus_space_handle_t ioh = sc->sc_ioh; 419 int s; 420 421 s = splserial(); 422 COM_LOCK(sc); 423 sc->sc_cr3 = CR3_RXE | CR3_TXE; 424 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 425 COM_UNLOCK(sc); 426 splx(s); 427 } 428 #endif 429 430 int 431 sacom_activate(struct device *self, enum devact act) 432 { 433 struct sacom_softc *sc = (struct sacom_softc *)self; 434 int s, rv = 0; 435 436 s = splserial(); 437 COM_LOCK(sc); 438 switch (act) { 439 case DVACT_ACTIVATE: 440 rv = EOPNOTSUPP; 441 break; 442 443 case DVACT_DEACTIVATE: 444 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 445 rv = EBUSY; 446 break; 447 } 448 449 if (sc->disable != NULL && sc->enabled != 0) { 450 (*sc->disable)(sc); 451 sc->enabled = 0; 452 } 453 break; 454 } 455 456 COM_UNLOCK(sc); 457 splx(s); 458 return (rv); 459 } 460 461 void 462 sacom_shutdown(struct sacom_softc *sc) 463 { 464 struct tty *tp = sc->sc_tty; 465 int s; 466 467 s = splserial(); 468 COM_LOCK(sc); 469 470 /* Clear any break condition set with TIOCSBRK. */ 471 sacom_break(sc, 0); 472 473 /* 474 * Hang up if necessary. Wait a bit, so the other side has time to 475 * notice even if we immediately open the port again. 476 * Avoid tsleeping above splhigh(). 477 */ 478 if (ISSET(tp->t_cflag, HUPCL)) { 479 sacom_modem(sc, 0); 480 COM_UNLOCK(sc); 481 splx(s); 482 /* XXX tsleep will only timeout */ 483 (void) tsleep(sc, TTIPRI, ttclos, hz); 484 s = splserial(); 485 COM_LOCK(sc); 486 } 487 488 /* Turn off interrupts. */ 489 sc->sc_cr3 = 0; 490 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 491 492 if (sc->disable) { 493 #ifdef DIAGNOSTIC 494 if (!sc->enabled) 495 panic("sacom_shutdown: not enabled?"); 496 #endif 497 (*sc->disable)(sc); 498 sc->enabled = 0; 499 } 500 COM_UNLOCK(sc); 501 splx(s); 502 } 503 504 int 505 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 506 { 507 struct sacom_softc *sc; 508 struct tty *tp; 509 int s, s2; 510 int error; 511 512 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 513 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 514 sc->sc_rbuf == NULL) 515 return (ENXIO); 516 517 if (!device_is_active(&sc->sc_dev)) 518 return (ENXIO); 519 520 tp = sc->sc_tty; 521 522 if (ISSET(tp->t_state, TS_ISOPEN) && 523 ISSET(tp->t_state, TS_XCLUDE) && 524 suser(l->l_proc->p_ucred, &l->l_proc->p_acflag) != 0) 525 return (EBUSY); 526 527 s = spltty(); 528 529 /* 530 * Do the following iff this is a first open. 531 */ 532 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 533 struct termios t; 534 535 tp->t_dev = dev; 536 537 s2 = splserial(); 538 COM_LOCK(sc); 539 540 if (sc->enable) { 541 if ((*sc->enable)(sc)) { 542 COM_UNLOCK(sc); 543 splx(s2); 544 splx(s); 545 printf("%s: device enable failed\n", 546 sc->sc_dev.dv_xname); 547 return (EIO); 548 } 549 sc->enabled = 1; 550 sacom_config(sc); 551 } 552 553 /* Turn on interrupts. */ 554 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 555 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 556 sc->sc_cr3); 557 558 559 COM_UNLOCK(sc); 560 splx(s2); 561 562 /* 563 * Initialize the termios status to the defaults. Add in the 564 * sticky bits from TIOCSFLAGS. 565 */ 566 t.c_ispeed = 0; 567 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 568 t.c_ospeed = sacomconsrate; 569 t.c_cflag = sacomconscflag; 570 } else { 571 t.c_ospeed = TTYDEF_SPEED; 572 t.c_cflag = TTYDEF_CFLAG; 573 } 574 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 575 SET(t.c_cflag, CLOCAL); 576 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 577 SET(t.c_cflag, CRTSCTS); 578 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 579 SET(t.c_cflag, MDMBUF); 580 /* Make sure sacomparam() will do something. */ 581 tp->t_ospeed = 0; 582 (void) sacomparam(tp, &t); 583 tp->t_iflag = TTYDEF_IFLAG; 584 tp->t_oflag = TTYDEF_OFLAG; 585 tp->t_lflag = TTYDEF_LFLAG; 586 ttychars(tp); 587 ttsetwater(tp); 588 589 s2 = splserial(); 590 COM_LOCK(sc); 591 592 /* 593 * Turn on DTR. We must always do this, even if carrier is not 594 * present, because otherwise we'd have to use TIOCSDTR 595 * immediately after setting CLOCAL, which applications do not 596 * expect. We always assert DTR while the device is open 597 * unless explicitly requested to deassert it. 598 */ 599 sacom_modem(sc, 1); 600 601 /* Clear the input ring, and unblock. */ 602 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 603 sc->sc_rbavail = SACOM_RING_SIZE; 604 sacom_iflush(sc); 605 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 606 sacom_hwiflow(sc); 607 608 #ifdef COM_DEBUG 609 if (sacom_debug) 610 comstatus(sc, "sacomopen "); 611 #endif 612 613 COM_UNLOCK(sc); 614 splx(s2); 615 } 616 617 splx(s); 618 619 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 620 if (error) 621 goto bad; 622 623 error = (*tp->t_linesw->l_open)(dev, tp); 624 if (error) 625 goto bad; 626 627 return (0); 628 629 bad: 630 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 631 /* 632 * We failed to open the device, and nobody else had it opened. 633 * Clean up the state as appropriate. 634 */ 635 sacom_shutdown(sc); 636 } 637 638 return (error); 639 } 640 641 int 642 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 643 { 644 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 645 struct tty *tp = sc->sc_tty; 646 647 /* XXX This is for cons.c. */ 648 if (!ISSET(tp->t_state, TS_ISOPEN)) 649 return (0); 650 651 (*tp->t_linesw->l_close)(tp, flag); 652 ttyclose(tp); 653 654 if (COM_ISALIVE(sc) == 0) 655 return (0); 656 657 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 658 /* 659 * Although we got a last close, the device may still be in 660 * use; e.g. if this was the dialout node, and there are still 661 * processes waiting for carrier on the non-dialout node. 662 */ 663 sacom_shutdown(sc); 664 } 665 666 return (0); 667 } 668 669 int 670 sacomread(dev_t dev, struct uio *uio, int flag) 671 { 672 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 673 struct tty *tp = sc->sc_tty; 674 675 if (COM_ISALIVE(sc) == 0) 676 return (EIO); 677 678 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 679 } 680 681 int 682 sacomwrite(dev_t dev, struct uio *uio, int flag) 683 { 684 struct sacom_softc *sc = device_lookup(&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_write)(tp, uio, flag)); 691 } 692 693 int 694 sacompoll(dev_t dev, int events, struct lwp *l) 695 { 696 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 697 struct tty *tp = sc->sc_tty; 698 699 if (COM_ISALIVE(sc) == 0) 700 return (EIO); 701 702 return ((*tp->t_linesw->l_poll)(tp, events, l)); 703 } 704 705 struct tty * 706 sacomtty(dev_t dev) 707 { 708 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 709 struct tty *tp = sc->sc_tty; 710 711 return (tp); 712 } 713 714 int 715 sacomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 716 { 717 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 718 struct tty *tp = sc->sc_tty; 719 int error; 720 int s; 721 722 if (COM_ISALIVE(sc) == 0) 723 return (EIO); 724 725 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 726 if (error != EPASSTHROUGH) 727 return (error); 728 729 error = ttioctl(tp, cmd, data, flag, l); 730 if (error != EPASSTHROUGH) 731 return (error); 732 733 error = 0; 734 735 s = splserial(); 736 COM_LOCK(sc); 737 738 switch (cmd) { 739 case TIOCSBRK: 740 sacom_break(sc, 1); 741 break; 742 743 case TIOCCBRK: 744 sacom_break(sc, 0); 745 break; 746 747 case TIOCSDTR: 748 sacom_modem(sc, 1); 749 break; 750 751 case TIOCCDTR: 752 sacom_modem(sc, 0); 753 break; 754 755 case TIOCGFLAGS: 756 *(int *)data = sc->sc_swflags; 757 break; 758 759 case TIOCSFLAGS: 760 error = suser(l->l_proc->p_ucred, &l->l_proc->p_acflag); 761 if (error) 762 break; 763 sc->sc_swflags = *(int *)data; 764 break; 765 766 case TIOCMSET: 767 case TIOCMBIS: 768 case TIOCMBIC: 769 tiocm_to_sacom(sc, cmd, *(int *)data); 770 break; 771 772 case TIOCMGET: 773 *(int *)data = sacom_to_tiocm(sc); 774 break; 775 776 default: 777 error = EPASSTHROUGH; 778 break; 779 } 780 781 COM_UNLOCK(sc); 782 splx(s); 783 784 #ifdef COM_DEBUG 785 if (sacom_debug) 786 comstatus(sc, "comioctl "); 787 #endif 788 789 return (error); 790 } 791 792 static inline void 793 sacom_schedrx(struct sacom_softc *sc) 794 { 795 796 sc->sc_rx_ready = 1; 797 798 /* Wake up the poller. */ 799 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 800 softintr_schedule(sc->sc_si); 801 #else 802 setsoftserial(); 803 #endif 804 } 805 806 void 807 sacom_break(struct sacom_softc *sc, int onoff) 808 { 809 810 if (onoff) 811 SET(sc->sc_cr3, CR3_BRK); 812 else 813 CLR(sc->sc_cr3, CR3_BRK); 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 sacom_modem(struct sacom_softc *sc, int onoff) 827 { 828 if (!sc->sc_heldchange) { 829 if (sc->sc_tx_busy) { 830 sc->sc_heldtbc = sc->sc_tbc; 831 sc->sc_tbc = 0; 832 sc->sc_heldchange = 1; 833 } else 834 sacom_loadchannelregs(sc); 835 } 836 } 837 838 void 839 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 840 { 841 } 842 843 int 844 sacom_to_tiocm(struct sacom_softc *sc) 845 { 846 int ttybits = 0; 847 848 if (sc->sc_cr3 != 0) 849 SET(ttybits, TIOCM_LE); 850 851 return (ttybits); 852 } 853 854 static u_int 855 cflag2cr0(tcflag_t cflag) 856 { 857 u_int cr0; 858 859 cr0 = (cflag & PARENB) ? CR0_PE : 0; 860 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 861 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 862 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 863 864 return (cr0); 865 } 866 867 int 868 sacomparam(struct tty *tp, struct termios *t) 869 { 870 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 871 int ospeed = SACOMSPEED(t->c_ospeed); 872 u_int cr0; 873 int s; 874 875 if (COM_ISALIVE(sc) == 0) 876 return (EIO); 877 878 /* Check requested parameters. */ 879 if (ospeed < 0) 880 return (EINVAL); 881 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 882 return (EINVAL); 883 884 /* 885 * For the console, always force CLOCAL and !HUPCL, so that the port 886 * is always active. 887 */ 888 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 889 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 890 SET(t->c_cflag, CLOCAL); 891 CLR(t->c_cflag, HUPCL); 892 } 893 894 /* 895 * If there were no changes, don't do anything. This avoids dropping 896 * input and improves performance when all we did was frob things like 897 * VMIN and VTIME. 898 */ 899 if (tp->t_ospeed == t->c_ospeed && 900 tp->t_cflag == t->c_cflag) 901 return (0); 902 903 cr0 = cflag2cr0(t->c_cflag); 904 905 s = splserial(); 906 COM_LOCK(sc); 907 908 sc->sc_cr0 = cr0; 909 910 sc->sc_speed = ospeed; 911 912 /* And copy to tty. */ 913 tp->t_ispeed = 0; 914 tp->t_ospeed = t->c_ospeed; 915 tp->t_cflag = t->c_cflag; 916 917 if (!sc->sc_heldchange) { 918 if (sc->sc_tx_busy) { 919 sc->sc_heldtbc = sc->sc_tbc; 920 sc->sc_tbc = 0; 921 sc->sc_heldchange = 1; 922 } else 923 sacom_loadchannelregs(sc); 924 } 925 926 if (!ISSET(t->c_cflag, CHWFLOW)) { 927 /* Disable the high water mark. */ 928 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 929 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 930 sacom_schedrx(sc); 931 } 932 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 933 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 934 sacom_hwiflow(sc); 935 } 936 } 937 938 COM_UNLOCK(sc); 939 splx(s); 940 941 (void) (*tp->t_linesw->l_modem)(tp, 1); 942 943 #ifdef COM_DEBUG 944 if (sacom_debug) 945 comstatus(sc, "comparam "); 946 #endif 947 948 return (0); 949 } 950 951 void 952 sacom_iflush(struct sacom_softc *sc) 953 { 954 bus_space_tag_t iot = sc->sc_iot; 955 bus_space_handle_t ioh = sc->sc_ioh; 956 #ifdef DIAGNOSTIC 957 int reg; 958 #endif 959 int timo; 960 961 #ifdef DIAGNOSTIC 962 reg = 0xffff; 963 #endif 964 timo = 50; 965 /* flush any pending I/O */ 966 if (sc->sc_cr3 & CR3_RXE) { 967 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 968 && --timo) 969 #ifdef DIAGNOSTIC 970 reg = 971 #else 972 (void) 973 #endif 974 bus_space_read_4(iot, ioh, SACOM_DR); 975 } 976 #if 0 977 /* XXX is it good idea to wait TX finish? */ 978 if (sc->sc_cr3 & CR3_TXE) { 979 timo = 500; 980 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 981 && --timo) 982 delay(100); 983 } 984 #endif 985 #ifdef DIAGNOSTIC 986 if (!timo) 987 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 988 reg); 989 #endif 990 } 991 992 void 993 sacom_loadchannelregs(struct sacom_softc *sc) 994 { 995 bus_space_tag_t iot = sc->sc_iot; 996 bus_space_handle_t ioh = sc->sc_ioh; 997 998 /* XXXXX necessary? */ 999 sacom_iflush(sc); 1000 1001 /* Need to stop engines first. */ 1002 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1003 1004 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1005 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1006 1007 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1008 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1009 } 1010 1011 int 1012 sacomhwiflow(struct tty *tp, int block) 1013 { 1014 #if 0 1015 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1016 int s; 1017 1018 if (COM_ISALIVE(sc) == 0) 1019 return (0); 1020 1021 if (sc->sc_mcr_rts == 0) 1022 return (0); 1023 1024 s = splserial(); 1025 COM_LOCK(sc); 1026 1027 if (block) { 1028 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1029 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1030 sacom_hwiflow(sc); 1031 } 1032 } else { 1033 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1034 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1035 sacom_schedrx(sc); 1036 } 1037 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1038 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1039 sacom_hwiflow(sc); 1040 } 1041 } 1042 1043 COM_UNLOCK(sc); 1044 splx(s); 1045 #endif 1046 return (1); 1047 } 1048 1049 /* 1050 * (un)block input via hw flowcontrol 1051 */ 1052 void 1053 sacom_hwiflow(struct sacom_softc *sc) 1054 { 1055 #if 0 1056 bus_space_tag_t iot = sc->sc_iot; 1057 bus_space_handle_t ioh = sc->sc_ioh; 1058 1059 /* XXX implement */ 1060 #endif 1061 } 1062 1063 1064 void 1065 sacomstart(struct tty *tp) 1066 { 1067 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1068 bus_space_tag_t iot = sc->sc_iot; 1069 bus_space_handle_t ioh = sc->sc_ioh; 1070 int s; 1071 1072 if (COM_ISALIVE(sc) == 0) 1073 return; 1074 1075 s = spltty(); 1076 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1077 goto out; 1078 1079 if (tp->t_outq.c_cc <= tp->t_lowat) { 1080 if (ISSET(tp->t_state, TS_ASLEEP)) { 1081 CLR(tp->t_state, TS_ASLEEP); 1082 wakeup(&tp->t_outq); 1083 } 1084 selwakeup(&tp->t_wsel); 1085 if (tp->t_outq.c_cc == 0) 1086 goto out; 1087 } 1088 1089 /* Grab the first contiguous region of buffer space. */ 1090 { 1091 u_char *tba; 1092 int tbc; 1093 1094 tba = tp->t_outq.c_cf; 1095 tbc = ndqb(&tp->t_outq, 0); 1096 1097 (void)splserial(); 1098 COM_LOCK(sc); 1099 1100 sc->sc_tba = tba; 1101 sc->sc_tbc = tbc; 1102 } 1103 1104 SET(tp->t_state, TS_BUSY); 1105 sc->sc_tx_busy = 1; 1106 1107 /* Enable transmit completion interrupts if necessary. */ 1108 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1109 SET(sc->sc_cr3, CR3_TIE); 1110 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1111 } 1112 1113 /* Output the first chunk of the contiguous buffer. */ 1114 sacom_filltx(sc); 1115 1116 COM_UNLOCK(sc); 1117 out: 1118 splx(s); 1119 return; 1120 } 1121 1122 void 1123 sacom_filltx(struct sacom_softc *sc) 1124 { 1125 bus_space_tag_t iot = sc->sc_iot; 1126 bus_space_handle_t ioh = sc->sc_ioh; 1127 int c, n; 1128 1129 n = 0; 1130 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1131 & SR1_TNF) { 1132 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1133 break; 1134 c = *(sc->sc_tba + n); 1135 c &= 0xff; 1136 bus_space_write_4(iot, ioh, SACOM_DR, c); 1137 n++; 1138 } 1139 sc->sc_tbc -= n; 1140 sc->sc_tba += n; 1141 } 1142 1143 /* 1144 * Stop output on a line. 1145 */ 1146 void 1147 sacomstop(struct tty *tp, int flag) 1148 { 1149 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1150 int s; 1151 1152 s = splserial(); 1153 COM_LOCK(sc); 1154 if (ISSET(tp->t_state, TS_BUSY)) { 1155 /* Stop transmitting at the next chunk. */ 1156 sc->sc_tbc = 0; 1157 sc->sc_heldtbc = 0; 1158 if (!ISSET(tp->t_state, TS_TTSTOP)) 1159 SET(tp->t_state, TS_FLUSH); 1160 } 1161 COM_UNLOCK(sc); 1162 splx(s); 1163 } 1164 1165 static inline void 1166 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1167 { 1168 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1169 u_char *get, *end; 1170 u_int cc, scc; 1171 u_char sr1; 1172 int code; 1173 int s; 1174 1175 end = sc->sc_ebuf; 1176 get = sc->sc_rbget; 1177 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1178 1179 while (cc) { 1180 code = get[0]; 1181 sr1 = get[1]; 1182 if (ISSET(sr1, SR1_FRE)) 1183 SET(code, TTY_FE); 1184 if (ISSET(sr1, SR1_PRE)) 1185 SET(code, TTY_PE); 1186 if ((*rint)(code, tp) == -1) { 1187 /* 1188 * The line discipline's buffer is out of space. 1189 */ 1190 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1191 /* 1192 * We're either not using flow control, or the 1193 * line discipline didn't tell us to block for 1194 * some reason. Either way, we have no way to 1195 * know when there's more space available, so 1196 * just drop the rest of the data. 1197 */ 1198 get += cc << 1; 1199 if (get >= end) 1200 get -= SACOM_RING_SIZE << 1; 1201 cc = 0; 1202 } else { 1203 /* 1204 * Don't schedule any more receive processing 1205 * until the line discipline tells us there's 1206 * space available (through comhwiflow()). 1207 * Leave the rest of the data in the input 1208 * buffer. 1209 */ 1210 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1211 } 1212 break; 1213 } 1214 get += 2; 1215 if (get >= end) 1216 get = sc->sc_rbuf; 1217 cc--; 1218 } 1219 1220 if (cc != scc) { 1221 sc->sc_rbget = get; 1222 s = splserial(); 1223 COM_LOCK(sc); 1224 1225 cc = sc->sc_rbavail += scc - cc; 1226 /* Buffers should be ok again, release possible block. */ 1227 if (cc >= 1) { 1228 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1229 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1230 SET(sc->sc_cr3, CR3_RIE); 1231 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1232 SACOM_CR3, sc->sc_cr3); 1233 } 1234 } 1235 COM_UNLOCK(sc); 1236 splx(s); 1237 } 1238 } 1239 1240 static inline void 1241 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1242 { 1243 1244 CLR(tp->t_state, TS_BUSY); 1245 if (ISSET(tp->t_state, TS_FLUSH)) 1246 CLR(tp->t_state, TS_FLUSH); 1247 else 1248 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1249 (*tp->t_linesw->l_start)(tp); 1250 } 1251 1252 static inline void 1253 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1254 { 1255 } 1256 1257 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1258 void 1259 sacomsoft(void *arg) 1260 { 1261 struct sacom_softc *sc = arg; 1262 struct tty *tp; 1263 1264 if (COM_ISALIVE(sc) == 0) 1265 return; 1266 1267 { 1268 #else 1269 void 1270 sacomsoft(void) 1271 { 1272 struct sacom_softc *sc; 1273 struct tty *tp; 1274 int unit; 1275 1276 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1277 sc = device_lookup(&sacom_cd, unit); 1278 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1279 continue; 1280 1281 if (COM_ISALIVE(sc) == 0) 1282 continue; 1283 1284 tp = sc->sc_tty; 1285 if (tp == NULL) 1286 continue; 1287 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1288 continue; 1289 #endif 1290 tp = sc->sc_tty; 1291 1292 if (sc->sc_rx_ready) { 1293 sc->sc_rx_ready = 0; 1294 sacom_rxsoft(sc, tp); 1295 } 1296 1297 if (sc->sc_st_check) { 1298 sc->sc_st_check = 0; 1299 sacom_stsoft(sc, tp); 1300 } 1301 1302 if (sc->sc_tx_done) { 1303 sc->sc_tx_done = 0; 1304 sacom_txsoft(sc, tp); 1305 } 1306 } 1307 1308 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1309 #endif 1310 } 1311 1312 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1313 /* there has got to be a better way to do comsoft() */ 1314 }} 1315 #endif 1316 1317 int 1318 sacomintr(void *arg) 1319 { 1320 struct sacom_softc *sc = arg; 1321 bus_space_tag_t iot = sc->sc_iot; 1322 bus_space_handle_t ioh = sc->sc_ioh; 1323 u_char *put, *end; 1324 u_int cc; 1325 u_int sr0, sr1; 1326 1327 if (COM_ISALIVE(sc) == 0) 1328 return (0); 1329 1330 COM_LOCK(sc); 1331 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1332 if (! sr0) { 1333 COM_UNLOCK(sc); 1334 return (0); 1335 } 1336 if (ISSET(sr0, SR0_EIF)) 1337 /* XXX silently discard error bits */ 1338 bus_space_read_4(iot, ioh, SACOM_DR); 1339 if (ISSET(sr0, SR0_RBB)) 1340 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1341 if (ISSET(sr0, SR0_REB)) { 1342 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1343 #if defined(DDB) || defined(KGDB) 1344 #ifndef DDB_BREAK_CHAR 1345 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1346 console_debugger(); 1347 } 1348 #endif 1349 #endif /* DDB || KGDB */ 1350 } 1351 1352 1353 end = sc->sc_ebuf; 1354 put = sc->sc_rbput; 1355 cc = sc->sc_rbavail; 1356 1357 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1358 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1359 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1360 while (cc > 0) { 1361 if (!ISSET(sr1, SR1_RNE)) { 1362 bus_space_write_4(iot, ioh, SACOM_SR0, 1363 SR0_RID); 1364 break; 1365 } 1366 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1367 put[1] = sr1; 1368 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1369 if (put[0] == DDB_BREAK_CHAR && 1370 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1371 console_debugger(); 1372 1373 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1374 continue; 1375 } 1376 #endif 1377 put += 2; 1378 if (put >= end) 1379 put = sc->sc_rbuf; 1380 cc--; 1381 1382 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1383 } 1384 1385 /* 1386 * Current string of incoming characters ended because 1387 * no more data was available or we ran out of space. 1388 * Schedule a receive event if any data was received. 1389 * If we're out of space, turn off receive interrupts. 1390 */ 1391 sc->sc_rbput = put; 1392 sc->sc_rbavail = cc; 1393 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1394 sc->sc_rx_ready = 1; 1395 1396 /* XXX do RX hardware flow control */ 1397 1398 /* 1399 * If we're out of space, disable receive interrupts 1400 * until the queue has drained a bit. 1401 */ 1402 if (!cc) { 1403 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1404 CLR(sc->sc_cr3, CR3_RIE); 1405 bus_space_write_4(iot, ioh, SACOM_CR3, 1406 sc->sc_cr3); 1407 } 1408 } else { 1409 #ifdef DIAGNOSTIC 1410 panic("sacomintr: we shouldn't reach here"); 1411 #endif 1412 CLR(sc->sc_cr3, CR3_RIE); 1413 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1414 } 1415 } 1416 1417 /* 1418 * Done handling any receive interrupts. See if data can be 1419 * transmitted as well. Schedule tx done event if no data left 1420 * and tty was marked busy. 1421 */ 1422 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1423 if (ISSET(sr0, SR0_TFS)) { 1424 /* 1425 * If we've delayed a parameter change, do it now, and restart 1426 * output. 1427 * XXX sacom_loadchanelregs() waits TX completion, 1428 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1429 */ 1430 if (sc->sc_heldchange) { 1431 sacom_loadchannelregs(sc); 1432 sc->sc_heldchange = 0; 1433 sc->sc_tbc = sc->sc_heldtbc; 1434 sc->sc_heldtbc = 0; 1435 } 1436 1437 /* Output the next chunk of the contiguous buffer, if any. */ 1438 if (sc->sc_tbc > 0) { 1439 sacom_filltx(sc); 1440 } else { 1441 /* Disable transmit completion interrupts if necessary. */ 1442 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1443 CLR(sc->sc_cr3, CR3_TIE); 1444 bus_space_write_4(iot, ioh, SACOM_CR3, 1445 sc->sc_cr3); 1446 } 1447 if (sc->sc_tx_busy) { 1448 sc->sc_tx_busy = 0; 1449 sc->sc_tx_done = 1; 1450 } 1451 } 1452 } 1453 COM_UNLOCK(sc); 1454 1455 /* Wake up the poller. */ 1456 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1457 softintr_schedule(sc->sc_si); 1458 #else 1459 setsoftserial(); 1460 #endif 1461 1462 #if NRND > 0 && defined(RND_COM) 1463 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1464 #endif 1465 return (1); 1466 } 1467 1468 static void 1469 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1470 1471 /* XXX this should be done at sc->enable function */ 1472 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1473 SAGPIO_PCR, 0xa0000); 1474 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1475 SAGPIO_PSR, 0x100); 1476 } 1477 1478 /* Initialization for serial console */ 1479 int 1480 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1481 bus_space_handle_t *iohp) 1482 { 1483 int brd, cr0; 1484 1485 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1486 printf("register map failed\n"); 1487 1488 /* wait for the Tx queue to drain and disable the UART */ 1489 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1490 ; 1491 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1492 1493 cr0 = cflag2cr0(cflag); 1494 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1495 1496 brd = SACOMSPEED(baud); 1497 sacomconsrate = baud; 1498 sacomconsaddr = iobase; 1499 sacomconscflag = cflag; 1500 /* XXX assumes little endian */ 1501 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1502 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1503 1504 /* enable the UART */ 1505 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1506 1507 return (0); 1508 } 1509 1510 void 1511 sacomcnprobe(struct consdev *cp) 1512 { 1513 cp->cn_pri = CN_REMOTE; 1514 } 1515 1516 void 1517 sacomcninit(struct consdev *cp) 1518 { 1519 if (cp == NULL) { 1520 /* XXX cp == NULL means that MMU is disabled. */ 1521 sacomconsioh = SACOM3_HW_BASE; 1522 sacomconstag = &sa11x0_bs_tag; 1523 cn_tab = &sacomcons; 1524 return; 1525 } 1526 1527 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1528 CONMODE, &sacomconsioh)) 1529 panic("can't init serial console @%x", CONADDR); 1530 cn_tab = &sacomcons; 1531 sacomconstag = &sa11x0_bs_tag; 1532 } 1533 1534 int 1535 sacomcngetc(dev_t dev) 1536 { 1537 int c, s; 1538 1539 s = spltty(); /* XXX do we need this? */ 1540 1541 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1542 & SR1_RNE)) { 1543 #if defined(DDB) || defined(KGDB) 1544 #ifndef DDB_BREAK_CHAR 1545 u_int sr0; 1546 extern int db_active; 1547 1548 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1549 if (ISSET(sr0, SR0_RBB)) 1550 bus_space_write_4(sacomconstag, sacomconsioh, 1551 SACOM_SR0, SR0_RBB); 1552 if (ISSET(sr0, SR0_REB)) { 1553 bus_space_write_4(sacomconstag, sacomconsioh, 1554 SACOM_SR0, SR0_REB); 1555 if (db_active == 0) 1556 console_debugger(); 1557 } 1558 #endif 1559 #endif /* DDB || KGDB */ 1560 } 1561 1562 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1563 c &= 0xff; 1564 splx(s); 1565 1566 return (c); 1567 } 1568 1569 void 1570 sacomcnputc(dev_t dev, int c) 1571 { 1572 int s; 1573 1574 s = spltty(); /* XXX do we need this? */ 1575 1576 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1577 & SR1_TNF)) 1578 ; 1579 1580 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1581 splx(s); 1582 } 1583 1584 void 1585 sacomcnpollc(dev_t dev, int on) 1586 { 1587 1588 } 1589 1590 #if 0 1591 #ifdef DEBUG 1592 int 1593 sacomcncharpoll(void) 1594 { 1595 int c; 1596 1597 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1598 & SR1_RNE)) 1599 return -1; 1600 1601 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1602 c &= 0xff; 1603 1604 return (c); 1605 } 1606 #endif 1607 #endif 1608 1609 /* helper function to identify the com ports used by 1610 console or KGDB (and not yet autoconf attached) */ 1611 int 1612 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1613 bus_space_handle_t *ioh) 1614 { 1615 bus_space_handle_t help; 1616 1617 if (! sacomconsattached && 1618 iot == sacomconstag && iobase == sacomconsaddr) 1619 help = sacomconsioh; 1620 else 1621 return (0); 1622 1623 if (ioh) 1624 *ioh = help; 1625 return (1); 1626 } 1627
Indexes created Fri Oct 03 02:09:57 GMT 2025