sa11x0_com.c revision 1.5
1 /* $NetBSD: sa11x0_com.c,v 1.5 2002/07/19 19:07:33 ichiro 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. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * @(#)com.c 7.5 (Berkeley) 5/16/91 75 */ 76 77 #include "opt_com.h" 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 81 #include "rnd.h" 82 #if NRND > 0 && defined(RND_COM) 83 #include <sys/rnd.h> 84 #endif 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/types.h> 89 #include <sys/conf.h> 90 #include <sys/file.h> 91 #include <sys/device.h> 92 #include <sys/kernel.h> 93 #include <sys/malloc.h> 94 #include <sys/tty.h> 95 #include <sys/uio.h> 96 #include <sys/vnode.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/bus.h> 101 #include <arm/sa11x0/sa11x0_reg.h> 102 #include <arm/sa11x0/sa11x0_var.h> 103 #include <arm/sa11x0/sa11x0_comreg.h> 104 #include <arm/sa11x0/sa11x0_comvar.h> 105 #include <arm/sa11x0/sa11x0_gpioreg.h> 106 107 #ifdef hpcarm 108 #include <hpc/include/platid.h> 109 #include <hpc/include/platid_mask.h> 110 #endif 111 112 #include "sacom.h" 113 114 cdev_decl(sacom); 115 116 static int sacom_match(struct device *, struct cfdata *, void *); 117 static void sacom_attach(struct device *, struct device *, void *); 118 static void sacom_filltx(struct sacom_softc *); 119 static void sacom_attach_subr(struct sacom_softc *); 120 #if defined(DDB) || defined(KGDB) 121 static void sacom_enable_debugport(struct sacom_softc *); 122 #endif 123 void sacom_config(struct sacom_softc *); 124 void sacom_shutdown(struct sacom_softc *); 125 static u_int cflag2cr0(tcflag_t); 126 int sacomparam(struct tty *, struct termios *); 127 void sacomstart(struct tty *); 128 void sacomstop(struct tty *, int); 129 int sacomhwiflow(struct tty *, int); 130 131 void sacom_loadchannelregs(struct sacom_softc *); 132 void sacom_hwiflow(struct sacom_softc *); 133 void sacom_break(struct sacom_softc *, int); 134 void sacom_modem(struct sacom_softc *, int); 135 void tiocm_to_sacom(struct sacom_softc *, u_long, int); 136 int sacom_to_tiocm(struct sacom_softc *); 137 void sacom_iflush(struct sacom_softc *); 138 139 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 140 void sacomsoft(void *); 141 #else 142 void sacomsoft(void); 143 #endif 144 145 static inline void sacom_rxsoft(struct sacom_softc *, struct tty *); 146 static inline void sacom_txsoft(struct sacom_softc *, struct tty *); 147 static inline void sacom_stsoft(struct sacom_softc *, struct tty *); 148 static inline void sacom_schedrx(struct sacom_softc *); 149 150 #ifdef hpcarm 151 /* HPCARM specific functions */ 152 static void sacom_j720_init(struct sa11x0_softc *, struct sacom_softc *); 153 #endif 154 155 #define COMUNIT_MASK 0x7ffff 156 #define COMDIALOUT_MASK 0x80000 157 158 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 159 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 160 161 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 162 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 163 164 #define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f)) 165 #define COM_LOCK(sc) 166 #define COM_UNLOCK(sc) 167 168 #define SET(t, f) (t) |= (f) 169 #define CLR(t, f) (t) &= ~(f) 170 #define ISSET(t, f) ((t) & (f)) 171 172 int sacomintr(void *); 173 int sacomcngetc(dev_t); 174 void sacomcnputc(dev_t, int); 175 void sacomcnpollc(dev_t, int); 176 177 void sacomcnprobe(struct consdev *); 178 void sacomcninit(struct consdev *); 179 180 extern struct bus_space sa11x0_bs_tag; 181 182 static bus_space_tag_t sacomconstag; 183 static bus_space_handle_t sacomconsioh; 184 static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */ 185 186 static int sacomconsattached; 187 static int sacomconsrate; 188 static tcflag_t sacomconscflag; 189 190 struct cfattach sacom_ca = { 191 sizeof(struct sacom_softc), sacom_match, sacom_attach 192 }; 193 extern struct cfdriver sacom_cd; 194 195 #ifdef hpcarm 196 struct platid_data sacom_platid_table[] = { 197 { &platid_mask_MACH_HP_JORNADA_720, sacom_j720_init }, 198 { &platid_mask_MACH_HP_JORNADA_720JP, sacom_j720_init }, 199 { NULL, NULL } 200 }; 201 #endif 202 203 struct consdev sacomcons = { 204 NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL, 205 NODEV, CN_NORMAL 206 }; 207 208 #ifndef CONMODE 209 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 210 #endif 211 #ifndef CONSPEED 212 #define CONSPEED 9600 213 #endif 214 #ifndef CONADDR 215 #define CONADDR SACOM3_BASE 216 #endif 217 218 static int 219 sacom_match(parent, match, aux) 220 struct device *parent; 221 struct cfdata *match; 222 void *aux; 223 { 224 return (1); 225 } 226 227 void 228 sacom_attach(parent, self, aux) 229 struct device *parent; 230 struct device *self; 231 void *aux; 232 { 233 struct sacom_softc *sc = (struct sacom_softc*)self; 234 struct sa11x0_attach_args *sa = aux; 235 236 #ifdef hpcarm 237 struct platid_data *p; 238 void (*mdinit)(struct device *, struct sacom_softc *); 239 #endif 240 241 printf("\n"); 242 243 sc->sc_iot = sa->sa_iot; 244 sc->sc_baseaddr = sa->sa_addr; 245 246 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 247 &sc->sc_ioh)) { 248 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 249 return; 250 } 251 252 printf("%s: ", sc->sc_dev.dv_xname); 253 switch(sc->sc_baseaddr) { 254 case 0x80050000: 255 printf("SA11x0 UART3\n"); 256 break; 257 case 0x80010000: 258 printf("SA11x0 UART1\n"); 259 break; 260 case 0x80030000: 261 printf("SA11x0 UART2 (IRDA)\n"); 262 break; 263 default: 264 printf("unknown SA11x0 UART\n"); 265 break; 266 } 267 268 sacom_attach_subr(sc); 269 270 #ifdef hpcarm 271 /* Do hpcarm specific initialization, if any */ 272 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 273 mdinit = p->data; 274 (mdinit)(parent, sc); 275 } 276 #endif 277 278 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 279 } 280 281 void 282 sacom_attach_subr(sc) 283 struct sacom_softc *sc; 284 { 285 bus_addr_t iobase = sc->sc_baseaddr; 286 bus_space_tag_t iot = sc->sc_iot; 287 struct tty *tp; 288 289 #if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK) 290 simple_lock_init(&sc->sc_lock); 291 #endif 292 293 /* XXX Do we need to disable interrupts here? */ 294 295 if (iot == sacomconstag && iobase == sacomconsaddr) { 296 sacomconsattached = 1; 297 sc->sc_speed = SACOMSPEED(sacomconsrate); 298 299 /* Make sure the console is always "hardwired". */ 300 delay(10000); /* wait for output to finish */ 301 SET(sc->sc_hwflags, COM_HW_CONSOLE); 302 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 303 } 304 305 tp = ttymalloc(); 306 tp->t_oproc = sacomstart; 307 tp->t_param = sacomparam; 308 tp->t_hwiflow = sacomhwiflow; 309 310 sc->sc_tty = tp; 311 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 312 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 313 sc->sc_rbavail = SACOM_RING_SIZE; 314 if (sc->sc_rbuf == NULL) { 315 printf("%s: unable to allocate ring buffer\n", 316 sc->sc_dev.dv_xname); 317 return; 318 } 319 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 320 sc->sc_tbc = 0; 321 322 tty_attach(tp); 323 324 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 325 int maj; 326 327 /* locate the major number */ 328 for (maj = 0; maj < nchrdev; maj++) 329 if (cdevsw[maj].d_open == sacomopen) 330 break; 331 332 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 333 334 delay(10000); /* XXX */ 335 printf("%s: console\n", sc->sc_dev.dv_xname); 336 delay(10000); /* XXX */ 337 } 338 339 340 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 341 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 342 #endif 343 344 #if NRND > 0 && defined(RND_COM) 345 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 346 RND_TYPE_TTY, 0); 347 #endif 348 349 /* if there are no enable/disable functions, assume the device 350 is always enabled */ 351 if (!sc->enable) 352 sc->enabled = 1; 353 354 sacom_config(sc); 355 356 SET(sc->sc_hwflags, COM_HW_DEV_OK); 357 } 358 359 /* This is necessary when dynamically changing SAIP configuration. */ 360 int 361 sacom_detach(self, flags) 362 struct device *self; 363 int flags; 364 { 365 struct sacom_softc *sc = (struct sacom_softc *)self; 366 int maj, mn; 367 368 /* locate the major number */ 369 for (maj = 0; maj < nchrdev; maj++) 370 if (cdevsw[maj].d_open == sacomopen) 371 break; 372 373 /* Nuke the vnodes for any open instances. */ 374 mn = self->dv_unit; 375 vdevgone(maj, mn, mn, VCHR); 376 377 mn |= COMDIALOUT_MASK; 378 vdevgone(maj, mn, mn, VCHR); 379 380 /* Free the receive buffer. */ 381 free(sc->sc_rbuf, M_DEVBUF); 382 383 /* Detach and free the tty. */ 384 tty_detach(sc->sc_tty); 385 ttyfree(sc->sc_tty); 386 387 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 388 /* Unhook the soft interrupt handler. */ 389 softintr_disestablish(sc->sc_si); 390 #endif 391 392 #if NRND > 0 && defined(RND_COM) 393 /* Unhook the entropy source. */ 394 rnd_detach_source(&sc->rnd_source); 395 #endif 396 397 return (0); 398 } 399 400 void 401 sacom_config(sc) 402 struct sacom_softc *sc; 403 { 404 bus_space_tag_t iot = sc->sc_iot; 405 bus_space_handle_t ioh = sc->sc_ioh; 406 407 /* Disable engine before configuring the device. */ 408 sc->sc_cr3 = 0; 409 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 410 411 #ifdef DDB 412 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 413 sacom_enable_debugport(sc); 414 #endif 415 } 416 417 #ifdef DDB 418 static void 419 sacom_enable_debugport(sc) 420 struct sacom_softc *sc; 421 { 422 bus_space_tag_t iot = sc->sc_iot; 423 bus_space_handle_t ioh = sc->sc_ioh; 424 int s; 425 426 s = splserial(); 427 COM_LOCK(sc); 428 sc->sc_cr3 = CR3_RXE | CR3_TXE; 429 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 430 COM_UNLOCK(sc); 431 splx(s); 432 } 433 #endif 434 435 int 436 sacom_activate(self, act) 437 struct device *self; 438 enum devact act; 439 { 440 struct sacom_softc *sc = (struct sacom_softc *)self; 441 int s, rv = 0; 442 443 s = splserial(); 444 COM_LOCK(sc); 445 switch (act) { 446 case DVACT_ACTIVATE: 447 rv = EOPNOTSUPP; 448 break; 449 450 case DVACT_DEACTIVATE: 451 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 452 rv = EBUSY; 453 break; 454 } 455 456 if (sc->disable != NULL && sc->enabled != 0) { 457 (*sc->disable)(sc); 458 sc->enabled = 0; 459 } 460 break; 461 } 462 463 COM_UNLOCK(sc); 464 splx(s); 465 return (rv); 466 } 467 468 void 469 sacom_shutdown(sc) 470 struct sacom_softc *sc; 471 { 472 struct tty *tp = sc->sc_tty; 473 int s; 474 475 s = splserial(); 476 COM_LOCK(sc); 477 478 /* Clear any break condition set with TIOCSBRK. */ 479 sacom_break(sc, 0); 480 481 /* 482 * Hang up if necessary. Wait a bit, so the other side has time to 483 * notice even if we immediately open the port again. 484 * Avoid tsleeping above splhigh(). 485 */ 486 if (ISSET(tp->t_cflag, HUPCL)) { 487 sacom_modem(sc, 0); 488 COM_UNLOCK(sc); 489 splx(s); 490 /* XXX tsleep will only timeout */ 491 (void) tsleep(sc, TTIPRI, ttclos, hz); 492 s = splserial(); 493 COM_LOCK(sc); 494 } 495 496 /* Turn off interrupts. */ 497 sc->sc_cr3 = 0; 498 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 499 500 if (sc->disable) { 501 #ifdef DIAGNOSTIC 502 if (!sc->enabled) 503 panic("sacom_shutdown: not enabled?"); 504 #endif 505 (*sc->disable)(sc); 506 sc->enabled = 0; 507 } 508 COM_UNLOCK(sc); 509 splx(s); 510 } 511 512 int 513 sacomopen(dev, flag, mode, p) 514 dev_t dev; 515 int flag, mode; 516 struct proc *p; 517 { 518 struct sacom_softc *sc; 519 struct tty *tp; 520 int s, s2; 521 int error; 522 523 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 524 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 525 sc->sc_rbuf == NULL) 526 return (ENXIO); 527 528 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 529 return (ENXIO); 530 531 tp = sc->sc_tty; 532 533 if (ISSET(tp->t_state, TS_ISOPEN) && 534 ISSET(tp->t_state, TS_XCLUDE) && 535 p->p_ucred->cr_uid != 0) 536 return (EBUSY); 537 538 s = spltty(); 539 540 /* 541 * Do the following iff this is a first open. 542 */ 543 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 544 struct termios t; 545 546 tp->t_dev = dev; 547 548 s2 = splserial(); 549 COM_LOCK(sc); 550 551 if (sc->enable) { 552 if ((*sc->enable)(sc)) { 553 COM_UNLOCK(sc); 554 splx(s2); 555 splx(s); 556 printf("%s: device enable failed\n", 557 sc->sc_dev.dv_xname); 558 return (EIO); 559 } 560 sc->enabled = 1; 561 sacom_config(sc); 562 } 563 564 /* Turn on interrupts. */ 565 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 566 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 567 sc->sc_cr3); 568 569 570 COM_UNLOCK(sc); 571 splx(s2); 572 573 /* 574 * Initialize the termios status to the defaults. Add in the 575 * sticky bits from TIOCSFLAGS. 576 */ 577 t.c_ispeed = 0; 578 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 579 t.c_ospeed = sacomconsrate; 580 t.c_cflag = sacomconscflag; 581 } else { 582 t.c_ospeed = TTYDEF_SPEED; 583 t.c_cflag = TTYDEF_CFLAG; 584 } 585 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 586 SET(t.c_cflag, CLOCAL); 587 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 588 SET(t.c_cflag, CRTSCTS); 589 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 590 SET(t.c_cflag, MDMBUF); 591 /* Make sure sacomparam() will do something. */ 592 tp->t_ospeed = 0; 593 (void) sacomparam(tp, &t); 594 tp->t_iflag = TTYDEF_IFLAG; 595 tp->t_oflag = TTYDEF_OFLAG; 596 tp->t_lflag = TTYDEF_LFLAG; 597 ttychars(tp); 598 ttsetwater(tp); 599 600 s2 = splserial(); 601 COM_LOCK(sc); 602 603 /* 604 * Turn on DTR. We must always do this, even if carrier is not 605 * present, because otherwise we'd have to use TIOCSDTR 606 * immediately after setting CLOCAL, which applications do not 607 * expect. We always assert DTR while the device is open 608 * unless explicitly requested to deassert it. 609 */ 610 sacom_modem(sc, 1); 611 612 /* Clear the input ring, and unblock. */ 613 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 614 sc->sc_rbavail = SACOM_RING_SIZE; 615 sacom_iflush(sc); 616 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 617 sacom_hwiflow(sc); 618 619 #ifdef COM_DEBUG 620 if (sacom_debug) 621 comstatus(sc, "sacomopen "); 622 #endif 623 624 COM_UNLOCK(sc); 625 splx(s2); 626 } 627 628 splx(s); 629 630 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 631 if (error) 632 goto bad; 633 634 error = (*tp->t_linesw->l_open)(dev, tp); 635 if (error) 636 goto bad; 637 638 return (0); 639 640 bad: 641 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 642 /* 643 * We failed to open the device, and nobody else had it opened. 644 * Clean up the state as appropriate. 645 */ 646 sacom_shutdown(sc); 647 } 648 649 return (error); 650 } 651 652 int 653 sacomclose(dev, flag, mode, p) 654 dev_t dev; 655 int flag, mode; 656 struct proc *p; 657 { 658 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 659 struct tty *tp = sc->sc_tty; 660 661 /* XXX This is for cons.c. */ 662 if (!ISSET(tp->t_state, TS_ISOPEN)) 663 return (0); 664 665 (*tp->t_linesw->l_close)(tp, flag); 666 ttyclose(tp); 667 668 if (COM_ISALIVE(sc) == 0) 669 return (0); 670 671 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 672 /* 673 * Although we got a last close, the device may still be in 674 * use; e.g. if this was the dialout node, and there are still 675 * processes waiting for carrier on the non-dialout node. 676 */ 677 sacom_shutdown(sc); 678 } 679 680 return (0); 681 } 682 683 int 684 sacomread(dev, uio, flag) 685 dev_t dev; 686 struct uio *uio; 687 int flag; 688 { 689 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 690 struct tty *tp = sc->sc_tty; 691 692 if (COM_ISALIVE(sc) == 0) 693 return (EIO); 694 695 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 696 } 697 698 int 699 sacomwrite(dev, uio, flag) 700 dev_t dev; 701 struct uio *uio; 702 int flag; 703 { 704 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 705 struct tty *tp = sc->sc_tty; 706 707 if (COM_ISALIVE(sc) == 0) 708 return (EIO); 709 710 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 711 } 712 713 int 714 sacompoll(dev, events, p) 715 dev_t dev; 716 int events; 717 struct proc *p; 718 { 719 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 720 struct tty *tp = sc->sc_tty; 721 722 if (COM_ISALIVE(sc) == 0) 723 return (EIO); 724 725 return ((*tp->t_linesw->l_poll)(tp, events, p)); 726 } 727 728 struct tty * 729 sacomtty(dev) 730 dev_t dev; 731 { 732 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 733 struct tty *tp = sc->sc_tty; 734 735 return (tp); 736 } 737 738 int 739 sacomioctl(dev, cmd, data, flag, p) 740 dev_t dev; 741 u_long cmd; 742 caddr_t data; 743 int flag; 744 struct proc *p; 745 { 746 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 747 struct tty *tp = sc->sc_tty; 748 int error; 749 int s; 750 751 if (COM_ISALIVE(sc) == 0) 752 return (EIO); 753 754 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 755 if (error != EPASSTHROUGH) 756 return (error); 757 758 error = ttioctl(tp, cmd, data, flag, p); 759 if (error != EPASSTHROUGH) 760 return (error); 761 762 error = 0; 763 764 s = splserial(); 765 COM_LOCK(sc); 766 767 switch (cmd) { 768 case TIOCSBRK: 769 sacom_break(sc, 1); 770 break; 771 772 case TIOCCBRK: 773 sacom_break(sc, 0); 774 break; 775 776 case TIOCSDTR: 777 sacom_modem(sc, 1); 778 break; 779 780 case TIOCCDTR: 781 sacom_modem(sc, 0); 782 break; 783 784 case TIOCGFLAGS: 785 *(int *)data = sc->sc_swflags; 786 break; 787 788 case TIOCSFLAGS: 789 error = suser(p->p_ucred, &p->p_acflag); 790 if (error) 791 break; 792 sc->sc_swflags = *(int *)data; 793 break; 794 795 case TIOCMSET: 796 case TIOCMBIS: 797 case TIOCMBIC: 798 tiocm_to_sacom(sc, cmd, *(int *)data); 799 break; 800 801 case TIOCMGET: 802 *(int *)data = sacom_to_tiocm(sc); 803 break; 804 805 default: 806 error = EPASSTHROUGH; 807 break; 808 } 809 810 COM_UNLOCK(sc); 811 splx(s); 812 813 #ifdef COM_DEBUG 814 if (sacom_debug) 815 comstatus(sc, "comioctl "); 816 #endif 817 818 return (error); 819 } 820 821 static inline void 822 sacom_schedrx(sc) 823 struct sacom_softc *sc; 824 { 825 826 sc->sc_rx_ready = 1; 827 828 /* Wake up the poller. */ 829 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 830 softintr_schedule(sc->sc_si); 831 #else 832 setsoftserial(); 833 #endif 834 } 835 836 void 837 sacom_break(sc, onoff) 838 struct sacom_softc *sc; 839 int onoff; 840 { 841 842 if (onoff) 843 SET(sc->sc_cr3, CR3_BRK); 844 else 845 CLR(sc->sc_cr3, CR3_BRK); 846 847 if (!sc->sc_heldchange) { 848 if (sc->sc_tx_busy) { 849 sc->sc_heldtbc = sc->sc_tbc; 850 sc->sc_tbc = 0; 851 sc->sc_heldchange = 1; 852 } else 853 sacom_loadchannelregs(sc); 854 } 855 } 856 857 void 858 sacom_modem(sc, onoff) 859 struct sacom_softc *sc; 860 int onoff; 861 { 862 if (!sc->sc_heldchange) { 863 if (sc->sc_tx_busy) { 864 sc->sc_heldtbc = sc->sc_tbc; 865 sc->sc_tbc = 0; 866 sc->sc_heldchange = 1; 867 } else 868 sacom_loadchannelregs(sc); 869 } 870 } 871 872 void 873 tiocm_to_sacom(sc, how, ttybits) 874 struct sacom_softc *sc; 875 u_long how; 876 int ttybits; 877 { 878 } 879 880 int 881 sacom_to_tiocm(sc) 882 struct sacom_softc *sc; 883 { 884 int ttybits = 0; 885 886 if (sc->sc_cr3 != 0) 887 SET(ttybits, TIOCM_LE); 888 889 return (ttybits); 890 } 891 892 static u_int 893 cflag2cr0(cflag) 894 tcflag_t cflag; 895 { 896 u_int cr0; 897 898 cr0 = (cflag & PARENB) ? CR0_PE : 0; 899 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 900 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 901 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 902 903 return (cr0); 904 } 905 906 int 907 sacomparam(tp, t) 908 struct tty *tp; 909 struct termios *t; 910 { 911 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 912 int ospeed = SACOMSPEED(t->c_ospeed); 913 u_int cr0; 914 int s; 915 916 if (COM_ISALIVE(sc) == 0) 917 return (EIO); 918 919 /* Check requested parameters. */ 920 if (ospeed < 0) 921 return (EINVAL); 922 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 923 return (EINVAL); 924 925 /* 926 * For the console, always force CLOCAL and !HUPCL, so that the port 927 * is always active. 928 */ 929 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 930 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 931 SET(t->c_cflag, CLOCAL); 932 CLR(t->c_cflag, HUPCL); 933 } 934 935 /* 936 * If there were no changes, don't do anything. This avoids dropping 937 * input and improves performance when all we did was frob things like 938 * VMIN and VTIME. 939 */ 940 if (tp->t_ospeed == t->c_ospeed && 941 tp->t_cflag == t->c_cflag) 942 return (0); 943 944 cr0 = cflag2cr0(t->c_cflag); 945 946 s = splserial(); 947 COM_LOCK(sc); 948 949 sc->sc_cr0 = cr0; 950 951 sc->sc_speed = ospeed; 952 953 /* And copy to tty. */ 954 tp->t_ispeed = 0; 955 tp->t_ospeed = t->c_ospeed; 956 tp->t_cflag = t->c_cflag; 957 958 if (!sc->sc_heldchange) { 959 if (sc->sc_tx_busy) { 960 sc->sc_heldtbc = sc->sc_tbc; 961 sc->sc_tbc = 0; 962 sc->sc_heldchange = 1; 963 } else 964 sacom_loadchannelregs(sc); 965 } 966 967 if (!ISSET(t->c_cflag, CHWFLOW)) { 968 /* Disable the high water mark. */ 969 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 970 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 971 sacom_schedrx(sc); 972 } 973 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 974 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 975 sacom_hwiflow(sc); 976 } 977 } 978 979 COM_UNLOCK(sc); 980 splx(s); 981 982 (void) (*tp->t_linesw->l_modem)(tp, 1); 983 984 #ifdef COM_DEBUG 985 if (sacom_debug) 986 comstatus(sc, "comparam "); 987 #endif 988 989 return (0); 990 } 991 992 void 993 sacom_iflush(sc) 994 struct sacom_softc *sc; 995 { 996 bus_space_tag_t iot = sc->sc_iot; 997 bus_space_handle_t ioh = sc->sc_ioh; 998 #ifdef DIAGNOSTIC 999 int reg; 1000 #endif 1001 int timo; 1002 1003 #ifdef DIAGNOSTIC 1004 reg = 0xffff; 1005 #endif 1006 timo = 50; 1007 /* flush any pending I/O */ 1008 if (sc->sc_cr3 & CR3_RXE) { 1009 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 1010 && --timo) 1011 #ifdef DIAGNOSTIC 1012 reg = 1013 #else 1014 (void) 1015 #endif 1016 bus_space_read_4(iot, ioh, SACOM_DR); 1017 } 1018 #if 0 1019 /* XXX is it good idea to wait TX finish? */ 1020 if (sc->sc_cr3 & CR3_TXE) { 1021 timo = 500; 1022 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 1023 && --timo) 1024 delay(100); 1025 } 1026 #endif 1027 #ifdef DIAGNOSTIC 1028 if (!timo) 1029 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1030 reg); 1031 #endif 1032 } 1033 1034 void 1035 sacom_loadchannelregs(sc) 1036 struct sacom_softc *sc; 1037 { 1038 bus_space_tag_t iot = sc->sc_iot; 1039 bus_space_handle_t ioh = sc->sc_ioh; 1040 1041 /* XXXXX necessary? */ 1042 sacom_iflush(sc); 1043 1044 /* Need to stop engines first. */ 1045 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1046 1047 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1048 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1049 1050 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1051 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1052 } 1053 1054 int 1055 sacomhwiflow(tp, block) 1056 struct tty *tp; 1057 int block; 1058 { 1059 #if 0 1060 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1061 int s; 1062 1063 if (COM_ISALIVE(sc) == 0) 1064 return (0); 1065 1066 if (sc->sc_mcr_rts == 0) 1067 return (0); 1068 1069 s = splserial(); 1070 COM_LOCK(sc); 1071 1072 if (block) { 1073 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1074 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1075 sacom_hwiflow(sc); 1076 } 1077 } else { 1078 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1079 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1080 sacom_schedrx(sc); 1081 } 1082 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1083 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1084 sacom_hwiflow(sc); 1085 } 1086 } 1087 1088 COM_UNLOCK(sc); 1089 splx(s); 1090 #endif 1091 return (1); 1092 } 1093 1094 /* 1095 * (un)block input via hw flowcontrol 1096 */ 1097 void 1098 sacom_hwiflow(sc) 1099 struct sacom_softc *sc; 1100 { 1101 #if 0 1102 bus_space_tag_t iot = sc->sc_iot; 1103 bus_space_handle_t ioh = sc->sc_ioh; 1104 1105 /* XXX implement */ 1106 #endif 1107 } 1108 1109 1110 void 1111 sacomstart(tp) 1112 struct tty *tp; 1113 { 1114 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1115 bus_space_tag_t iot = sc->sc_iot; 1116 bus_space_handle_t ioh = sc->sc_ioh; 1117 int s; 1118 1119 if (COM_ISALIVE(sc) == 0) 1120 return; 1121 1122 s = spltty(); 1123 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1124 goto out; 1125 1126 if (tp->t_outq.c_cc <= tp->t_lowat) { 1127 if (ISSET(tp->t_state, TS_ASLEEP)) { 1128 CLR(tp->t_state, TS_ASLEEP); 1129 wakeup(&tp->t_outq); 1130 } 1131 selwakeup(&tp->t_wsel); 1132 if (tp->t_outq.c_cc == 0) 1133 goto out; 1134 } 1135 1136 /* Grab the first contiguous region of buffer space. */ 1137 { 1138 u_char *tba; 1139 int tbc; 1140 1141 tba = tp->t_outq.c_cf; 1142 tbc = ndqb(&tp->t_outq, 0); 1143 1144 (void)splserial(); 1145 COM_LOCK(sc); 1146 1147 sc->sc_tba = tba; 1148 sc->sc_tbc = tbc; 1149 } 1150 1151 SET(tp->t_state, TS_BUSY); 1152 sc->sc_tx_busy = 1; 1153 1154 /* Enable transmit completion interrupts if necessary. */ 1155 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1156 SET(sc->sc_cr3, CR3_TIE); 1157 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1158 } 1159 1160 /* Output the first chunk of the contiguous buffer. */ 1161 sacom_filltx(sc); 1162 1163 COM_UNLOCK(sc); 1164 out: 1165 splx(s); 1166 return; 1167 } 1168 1169 void 1170 sacom_filltx(sc) 1171 struct sacom_softc *sc; 1172 { 1173 bus_space_tag_t iot = sc->sc_iot; 1174 bus_space_handle_t ioh = sc->sc_ioh; 1175 int c, n; 1176 1177 n = 0; 1178 while(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1179 & SR1_TNF) { 1180 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1181 break; 1182 c = *(sc->sc_tba + n); 1183 c &= 0xff; 1184 bus_space_write_4(iot, ioh, SACOM_DR, c); 1185 n++; 1186 } 1187 sc->sc_tbc -= n; 1188 sc->sc_tba += n; 1189 } 1190 1191 /* 1192 * Stop output on a line. 1193 */ 1194 void 1195 sacomstop(tp, flag) 1196 struct tty *tp; 1197 int flag; 1198 { 1199 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1200 int s; 1201 1202 s = splserial(); 1203 COM_LOCK(sc); 1204 if (ISSET(tp->t_state, TS_BUSY)) { 1205 /* Stop transmitting at the next chunk. */ 1206 sc->sc_tbc = 0; 1207 sc->sc_heldtbc = 0; 1208 if (!ISSET(tp->t_state, TS_TTSTOP)) 1209 SET(tp->t_state, TS_FLUSH); 1210 } 1211 COM_UNLOCK(sc); 1212 splx(s); 1213 } 1214 1215 static inline void 1216 sacom_rxsoft(sc, tp) 1217 struct sacom_softc *sc; 1218 struct tty *tp; 1219 { 1220 int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint; 1221 u_char *get, *end; 1222 u_int cc, scc; 1223 u_char sr1; 1224 int code; 1225 int s; 1226 1227 end = sc->sc_ebuf; 1228 get = sc->sc_rbget; 1229 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1230 1231 while (cc) { 1232 code = get[0]; 1233 sr1 = get[1]; 1234 if (ISSET(sr1, SR1_FRE)) 1235 SET(code, TTY_FE); 1236 if (ISSET(sr1, SR1_PRE)) 1237 SET(code, TTY_PE); 1238 if ((*rint)(code, tp) == -1) { 1239 /* 1240 * The line discipline's buffer is out of space. 1241 */ 1242 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1243 /* 1244 * We're either not using flow control, or the 1245 * line discipline didn't tell us to block for 1246 * some reason. Either way, we have no way to 1247 * know when there's more space available, so 1248 * just drop the rest of the data. 1249 */ 1250 get += cc << 1; 1251 if (get >= end) 1252 get -= SACOM_RING_SIZE << 1; 1253 cc = 0; 1254 } else { 1255 /* 1256 * Don't schedule any more receive processing 1257 * until the line discipline tells us there's 1258 * space available (through comhwiflow()). 1259 * Leave the rest of the data in the input 1260 * buffer. 1261 */ 1262 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1263 } 1264 break; 1265 } 1266 get += 2; 1267 if (get >= end) 1268 get = sc->sc_rbuf; 1269 cc--; 1270 } 1271 1272 if (cc != scc) { 1273 sc->sc_rbget = get; 1274 s = splserial(); 1275 COM_LOCK(sc); 1276 1277 cc = sc->sc_rbavail += scc - cc; 1278 /* Buffers should be ok again, release possible block. */ 1279 if (cc >= 1) { 1280 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1281 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1282 SET(sc->sc_cr3, CR3_RIE); 1283 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1284 SACOM_CR3, sc->sc_cr3); 1285 } 1286 } 1287 COM_UNLOCK(sc); 1288 splx(s); 1289 } 1290 } 1291 1292 static inline void 1293 sacom_txsoft(sc, tp) 1294 struct sacom_softc *sc; 1295 struct tty *tp; 1296 { 1297 1298 CLR(tp->t_state, TS_BUSY); 1299 if (ISSET(tp->t_state, TS_FLUSH)) 1300 CLR(tp->t_state, TS_FLUSH); 1301 else 1302 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1303 (*tp->t_linesw->l_start)(tp); 1304 } 1305 1306 static inline void 1307 sacom_stsoft(sc, tp) 1308 struct sacom_softc *sc; 1309 struct tty *tp; 1310 { 1311 } 1312 1313 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1314 void 1315 sacomsoft(arg) 1316 void *arg; 1317 { 1318 struct sacom_softc *sc = arg; 1319 struct tty *tp; 1320 1321 if (COM_ISALIVE(sc) == 0) 1322 return; 1323 1324 { 1325 #else 1326 void 1327 sacomsoft() 1328 { 1329 struct sacom_softc *sc; 1330 struct tty *tp; 1331 int unit; 1332 1333 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1334 sc = device_lookup(&sacom_cd, unit); 1335 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1336 continue; 1337 1338 if (COM_ISALIVE(sc) == 0) 1339 continue; 1340 1341 tp = sc->sc_tty; 1342 if (tp == NULL) 1343 continue; 1344 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1345 continue; 1346 #endif 1347 tp = sc->sc_tty; 1348 1349 if (sc->sc_rx_ready) { 1350 sc->sc_rx_ready = 0; 1351 sacom_rxsoft(sc, tp); 1352 } 1353 1354 if (sc->sc_st_check) { 1355 sc->sc_st_check = 0; 1356 sacom_stsoft(sc, tp); 1357 } 1358 1359 if (sc->sc_tx_done) { 1360 sc->sc_tx_done = 0; 1361 sacom_txsoft(sc, tp); 1362 } 1363 } 1364 1365 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1366 #endif 1367 } 1368 1369 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1370 /* there has got to be a better way to do comsoft() */ 1371 }} 1372 #endif 1373 1374 int 1375 sacomintr(arg) 1376 void *arg; 1377 { 1378 struct sacom_softc *sc = arg; 1379 bus_space_tag_t iot = sc->sc_iot; 1380 bus_space_handle_t ioh = sc->sc_ioh; 1381 u_char *put, *end; 1382 u_int cc; 1383 u_int sr0, sr1; 1384 1385 if (COM_ISALIVE(sc) == 0) 1386 return (0); 1387 1388 COM_LOCK(sc); 1389 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1390 if (! sr0) { 1391 COM_UNLOCK(sc); 1392 return (0); 1393 } 1394 if (ISSET(sr0, SR0_EIF)) 1395 /* XXX silently discard error bits */ 1396 bus_space_read_4(iot, ioh, SACOM_DR); 1397 if (ISSET(sr0, SR0_RBB)) 1398 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1399 if (ISSET(sr0, SR0_REB)) { 1400 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1401 #if defined(DDB) || defined(KGDB) 1402 #ifndef DDB_BREAK_CHAR 1403 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1404 console_debugger(); 1405 } 1406 #endif 1407 #endif /* DDB || KGDB */ 1408 } 1409 1410 1411 end = sc->sc_ebuf; 1412 put = sc->sc_rbput; 1413 cc = sc->sc_rbavail; 1414 1415 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1416 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1417 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1418 while (cc > 0) { 1419 if (!ISSET(sr1, SR1_RNE)) { 1420 bus_space_write_4(iot, ioh, SACOM_SR0, 1421 SR0_RID); 1422 break; 1423 } 1424 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1425 put[1] = sr1; 1426 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1427 if (put[0] == DDB_BREAK_CHAR && 1428 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1429 console_debugger(); 1430 1431 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1432 continue; 1433 } 1434 #endif 1435 put += 2; 1436 if (put >= end) 1437 put = sc->sc_rbuf; 1438 cc--; 1439 1440 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1441 } 1442 1443 /* 1444 * Current string of incoming characters ended because 1445 * no more data was available or we ran out of space. 1446 * Schedule a receive event if any data was received. 1447 * If we're out of space, turn off receive interrupts. 1448 */ 1449 sc->sc_rbput = put; 1450 sc->sc_rbavail = cc; 1451 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1452 sc->sc_rx_ready = 1; 1453 1454 /* XXX do RX hardware flow control */ 1455 1456 /* 1457 * If we're out of space, disable receive interrupts 1458 * until the queue has drained a bit. 1459 */ 1460 if (!cc) { 1461 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1462 CLR(sc->sc_cr3, CR3_RIE); 1463 bus_space_write_4(iot, ioh, SACOM_CR3, 1464 sc->sc_cr3); 1465 } 1466 } else { 1467 #ifdef DIAGNOSTIC 1468 panic("sacomintr: we shouldn't reach here\n"); 1469 #endif 1470 CLR(sc->sc_cr3, CR3_RIE); 1471 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1472 } 1473 } 1474 1475 /* 1476 * Done handling any receive interrupts. See if data can be 1477 * transmitted as well. Schedule tx done event if no data left 1478 * and tty was marked busy. 1479 */ 1480 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1481 if (ISSET(sr0, SR0_TFS)) { 1482 /* 1483 * If we've delayed a parameter change, do it now, and restart 1484 * output. 1485 * XXX sacom_loadchanelregs() waits TX completion, 1486 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1487 */ 1488 if (sc->sc_heldchange) { 1489 sacom_loadchannelregs(sc); 1490 sc->sc_heldchange = 0; 1491 sc->sc_tbc = sc->sc_heldtbc; 1492 sc->sc_heldtbc = 0; 1493 } 1494 1495 /* Output the next chunk of the contiguous buffer, if any. */ 1496 if (sc->sc_tbc > 0) { 1497 sacom_filltx(sc); 1498 } else { 1499 /* Disable transmit completion interrupts if necessary. */ 1500 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1501 CLR(sc->sc_cr3, CR3_TIE); 1502 bus_space_write_4(iot, ioh, SACOM_CR3, 1503 sc->sc_cr3); 1504 } 1505 if (sc->sc_tx_busy) { 1506 sc->sc_tx_busy = 0; 1507 sc->sc_tx_done = 1; 1508 } 1509 } 1510 } 1511 COM_UNLOCK(sc); 1512 1513 /* Wake up the poller. */ 1514 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1515 softintr_schedule(sc->sc_si); 1516 #else 1517 setsoftserial(); 1518 #endif 1519 1520 #if NRND > 0 && defined(RND_COM) 1521 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1522 #endif 1523 return (1); 1524 } 1525 1526 static void 1527 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1528 1529 /* XXX this should be done at sc->enable function */ 1530 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1531 SAGPIO_PCR, 0xa0000); 1532 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1533 SAGPIO_PSR, 0x100); 1534 } 1535 1536 /* Initialization for serial console */ 1537 int 1538 sacominit(iot, iobase, baud, cflag, iohp) 1539 bus_space_tag_t iot; 1540 bus_addr_t iobase; 1541 int baud; 1542 tcflag_t cflag; 1543 bus_space_handle_t *iohp; 1544 { 1545 int brd, cr0; 1546 1547 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1548 printf("register map failed\n"); 1549 1550 /* wait for the Tx queue to drain and disable the UART */ 1551 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1552 ; 1553 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1554 1555 cr0 = cflag2cr0(cflag); 1556 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1557 1558 brd = SACOMSPEED(baud); 1559 sacomconsrate = baud; 1560 sacomconsaddr = iobase; 1561 sacomconscflag = cflag; 1562 /* XXX assumes little endian */ 1563 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1564 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1565 1566 /* enable the UART */ 1567 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1568 1569 return (0); 1570 } 1571 1572 void 1573 sacomcnprobe(cp) 1574 struct consdev *cp; 1575 { 1576 cp->cn_pri = CN_REMOTE; 1577 } 1578 1579 void 1580 sacomcninit(cp) 1581 struct consdev *cp; 1582 { 1583 if (cp == NULL) { 1584 /* XXX cp == NULL means that MMU is disabled. */ 1585 sacomconsioh = SACOM3_HW_BASE; 1586 sacomconstag = &sa11x0_bs_tag; 1587 cn_tab = &sacomcons; 1588 return; 1589 } 1590 1591 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1592 CONMODE, &sacomconsioh)) 1593 panic("can't init serial console @%x", CONADDR); 1594 cn_tab = &sacomcons; 1595 sacomconstag = &sa11x0_bs_tag; 1596 } 1597 1598 int 1599 sacomcngetc(dev) 1600 dev_t dev; 1601 { 1602 int c, s; 1603 1604 s = spltty(); /* XXX do we need this? */ 1605 1606 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1607 & SR1_RNE)) { 1608 #if defined(DDB) || defined(KGDB) 1609 #ifndef DDB_BREAK_CHAR 1610 u_int sr0; 1611 extern int db_active; 1612 1613 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1614 if (ISSET(sr0, SR0_RBB)) 1615 bus_space_write_4(sacomconstag, sacomconsioh, 1616 SACOM_SR0, SR0_RBB); 1617 if (ISSET(sr0, SR0_REB)) { 1618 bus_space_write_4(sacomconstag, sacomconsioh, 1619 SACOM_SR0, SR0_REB); 1620 if (db_active == 0) 1621 console_debugger(); 1622 } 1623 #endif 1624 #endif /* DDB || KGDB */ 1625 } 1626 1627 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1628 c &= 0xff; 1629 splx(s); 1630 1631 return (c); 1632 } 1633 1634 void 1635 sacomcnputc(dev, c) 1636 dev_t dev; 1637 int c; 1638 { 1639 int s; 1640 1641 s = spltty(); /* XXX do we need this? */ 1642 1643 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1644 & SR1_TNF)) 1645 ; 1646 1647 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1648 splx(s); 1649 } 1650 1651 void 1652 sacomcnpollc(dev, on) 1653 dev_t dev; 1654 int on; 1655 { 1656 1657 } 1658 1659 #ifdef DEBUG 1660 int 1661 sacomcncharpoll() 1662 { 1663 int c; 1664 1665 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1666 & SR1_RNE)) 1667 return -1; 1668 1669 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1670 c &= 0xff; 1671 1672 return (c); 1673 } 1674 1675 #endif 1676 1677 /* helper function to identify the com ports used by 1678 console or KGDB (and not yet autoconf attached) */ 1679 int 1680 sacom_is_console(iot, iobase, ioh) 1681 bus_space_tag_t iot; 1682 bus_addr_t iobase; 1683 bus_space_handle_t *ioh; 1684 { 1685 bus_space_handle_t help; 1686 1687 if (! sacomconsattached && 1688 iot == sacomconstag && iobase == sacomconsaddr) 1689 help = sacomconsioh; 1690 else 1691 return (0); 1692 1693 if (ioh) 1694 *ioh = help; 1695 return (1); 1696 } 1697
Indexes created Thu Oct 02 14:10:14 GMT 2025