sa11x0_com.c revision 1.32
1 /* $NetBSD: sa11x0_com.c,v 1.32 2006/05/14 21:55:10 elad 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 1.32 2006/05/14 21:55:10 elad 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 return (1); 237 } 238 239 void 240 sacom_attach(struct device *parent, struct device *self, void *aux) 241 { 242 struct sacom_softc *sc = (struct sacom_softc*)self; 243 struct sa11x0_attach_args *sa = aux; 244 245 #ifdef hpcarm 246 struct platid_data *p; 247 void (*mdinit)(struct device *, struct sacom_softc *); 248 #endif 249 250 printf("\n"); 251 252 sc->sc_iot = sa->sa_iot; 253 sc->sc_baseaddr = sa->sa_addr; 254 255 if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, 256 &sc->sc_ioh)) { 257 printf("%s: unable to map registers\n", sc->sc_dev.dv_xname); 258 return; 259 } 260 261 printf("%s: ", sc->sc_dev.dv_xname); 262 switch(sc->sc_baseaddr) { 263 case 0x80050000: 264 printf("SA11x0 UART3\n"); 265 break; 266 case 0x80010000: 267 printf("SA11x0 UART1\n"); 268 break; 269 case 0x80030000: 270 printf("SA11x0 UART2 (IRDA)\n"); 271 break; 272 default: 273 printf("unknown SA11x0 UART\n"); 274 break; 275 } 276 277 sacom_attach_subr(sc); 278 279 #ifdef hpcarm 280 /* Do hpcarm specific initialization, if any */ 281 if ((p = platid_search_data(&platid, sacom_platid_table)) != NULL) { 282 mdinit = p->data; 283 (mdinit)(parent, sc); 284 } 285 #endif 286 287 sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc); 288 } 289 290 void 291 sacom_attach_subr(struct sacom_softc *sc) 292 { 293 bus_addr_t iobase = sc->sc_baseaddr; 294 bus_space_tag_t iot = sc->sc_iot; 295 struct tty *tp; 296 297 /* XXX Do we need to disable interrupts here? */ 298 299 if (iot == sacomconstag && iobase == sacomconsaddr) { 300 sacomconsattached = 1; 301 sc->sc_speed = SACOMSPEED(sacomconsrate); 302 303 /* Make sure the console is always "hardwired". */ 304 delay(10000); /* wait for output to finish */ 305 SET(sc->sc_hwflags, COM_HW_CONSOLE); 306 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 307 } 308 309 tp = ttymalloc(); 310 tp->t_oproc = sacomstart; 311 tp->t_param = sacomparam; 312 tp->t_hwiflow = sacomhwiflow; 313 314 sc->sc_tty = tp; 315 sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT); 316 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 317 sc->sc_rbavail = SACOM_RING_SIZE; 318 if (sc->sc_rbuf == NULL) { 319 printf("%s: unable to allocate ring buffer\n", 320 sc->sc_dev.dv_xname); 321 return; 322 } 323 sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1); 324 sc->sc_tbc = 0; 325 326 tty_attach(tp); 327 328 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 329 int maj; 330 331 /* locate the major number */ 332 maj = cdevsw_lookup_major(&sacom_cdevsw); 333 334 cn_tab->cn_dev = makedev(maj, device_unit(&sc->sc_dev)); 335 336 delay(10000); /* XXX */ 337 printf("%s: console\n", sc->sc_dev.dv_xname); 338 delay(10000); /* XXX */ 339 } 340 341 342 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 343 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc); 344 #endif 345 346 #if NRND > 0 && defined(RND_COM) 347 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 348 RND_TYPE_TTY, 0); 349 #endif 350 351 /* if there are no enable/disable functions, assume the device 352 is always enabled */ 353 if (!sc->enable) 354 sc->enabled = 1; 355 356 sacom_config(sc); 357 358 SET(sc->sc_hwflags, COM_HW_DEV_OK); 359 } 360 361 /* This is necessary when dynamically changing SAIP configuration. */ 362 int 363 sacom_detach(struct device *self, int flags) 364 { 365 struct sacom_softc *sc = (struct sacom_softc *)self; 366 int maj, mn; 367 368 /* locate the major number */ 369 maj = cdevsw_lookup_major(&sacom_cdevsw); 370 371 /* Nuke the vnodes for any open instances. */ 372 mn = device_unit(self); 373 vdevgone(maj, mn, mn, VCHR); 374 375 mn |= COMDIALOUT_MASK; 376 vdevgone(maj, mn, mn, VCHR); 377 378 /* Free the receive buffer. */ 379 free(sc->sc_rbuf, M_DEVBUF); 380 381 /* Detach and free the tty. */ 382 tty_detach(sc->sc_tty); 383 ttyfree(sc->sc_tty); 384 385 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 386 /* Unhook the soft interrupt handler. */ 387 softintr_disestablish(sc->sc_si); 388 #endif 389 390 #if NRND > 0 && defined(RND_COM) 391 /* Unhook the entropy source. */ 392 rnd_detach_source(&sc->rnd_source); 393 #endif 394 395 return (0); 396 } 397 398 void 399 sacom_config(struct sacom_softc *sc) 400 { 401 bus_space_tag_t iot = sc->sc_iot; 402 bus_space_handle_t ioh = sc->sc_ioh; 403 404 /* Disable engine before configuring the device. */ 405 sc->sc_cr3 = 0; 406 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 407 408 #ifdef DDB 409 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 410 sacom_enable_debugport(sc); 411 #endif 412 } 413 414 #ifdef DDB 415 static void 416 sacom_enable_debugport(struct sacom_softc *sc) 417 { 418 bus_space_tag_t iot = sc->sc_iot; 419 bus_space_handle_t ioh = sc->sc_ioh; 420 int s; 421 422 s = splserial(); 423 COM_LOCK(sc); 424 sc->sc_cr3 = CR3_RXE | CR3_TXE; 425 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 426 COM_UNLOCK(sc); 427 splx(s); 428 } 429 #endif 430 431 int 432 sacom_activate(struct device *self, enum devact act) 433 { 434 struct sacom_softc *sc = (struct sacom_softc *)self; 435 int s, rv = 0; 436 437 s = splserial(); 438 COM_LOCK(sc); 439 switch (act) { 440 case DVACT_ACTIVATE: 441 rv = EOPNOTSUPP; 442 break; 443 444 case DVACT_DEACTIVATE: 445 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 446 rv = EBUSY; 447 break; 448 } 449 450 if (sc->disable != NULL && sc->enabled != 0) { 451 (*sc->disable)(sc); 452 sc->enabled = 0; 453 } 454 break; 455 } 456 457 COM_UNLOCK(sc); 458 splx(s); 459 return (rv); 460 } 461 462 void 463 sacom_shutdown(struct sacom_softc *sc) 464 { 465 struct tty *tp = sc->sc_tty; 466 int s; 467 468 s = splserial(); 469 COM_LOCK(sc); 470 471 /* Clear any break condition set with TIOCSBRK. */ 472 sacom_break(sc, 0); 473 474 /* 475 * Hang up if necessary. Wait a bit, so the other side has time to 476 * notice even if we immediately open the port again. 477 * Avoid tsleeping above splhigh(). 478 */ 479 if (ISSET(tp->t_cflag, HUPCL)) { 480 sacom_modem(sc, 0); 481 COM_UNLOCK(sc); 482 splx(s); 483 /* XXX tsleep will only timeout */ 484 (void) tsleep(sc, TTIPRI, ttclos, hz); 485 s = splserial(); 486 COM_LOCK(sc); 487 } 488 489 /* Turn off interrupts. */ 490 sc->sc_cr3 = 0; 491 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3); 492 493 if (sc->disable) { 494 #ifdef DIAGNOSTIC 495 if (!sc->enabled) 496 panic("sacom_shutdown: not enabled?"); 497 #endif 498 (*sc->disable)(sc); 499 sc->enabled = 0; 500 } 501 COM_UNLOCK(sc); 502 splx(s); 503 } 504 505 int 506 sacomopen(dev_t dev, int flag, int mode, struct lwp *l) 507 { 508 struct sacom_softc *sc; 509 struct tty *tp; 510 int s, s2; 511 int error; 512 513 sc = device_lookup(&sacom_cd, COMUNIT(dev)); 514 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 515 sc->sc_rbuf == NULL) 516 return (ENXIO); 517 518 if (!device_is_active(&sc->sc_dev)) 519 return (ENXIO); 520 521 tp = sc->sc_tty; 522 523 if (ISSET(tp->t_state, TS_ISOPEN) && 524 ISSET(tp->t_state, TS_XCLUDE) && 525 kauth_authorize_generic(l->l_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag) != 0) 526 return (EBUSY); 527 528 s = spltty(); 529 530 /* 531 * Do the following iff this is a first open. 532 */ 533 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 534 struct termios t; 535 536 tp->t_dev = dev; 537 538 s2 = splserial(); 539 COM_LOCK(sc); 540 541 if (sc->enable) { 542 if ((*sc->enable)(sc)) { 543 COM_UNLOCK(sc); 544 splx(s2); 545 splx(s); 546 printf("%s: device enable failed\n", 547 sc->sc_dev.dv_xname); 548 return (EIO); 549 } 550 sc->enabled = 1; 551 sacom_config(sc); 552 } 553 554 /* Turn on interrupts. */ 555 sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE; 556 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 557 sc->sc_cr3); 558 559 560 COM_UNLOCK(sc); 561 splx(s2); 562 563 /* 564 * Initialize the termios status to the defaults. Add in the 565 * sticky bits from TIOCSFLAGS. 566 */ 567 t.c_ispeed = 0; 568 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 569 t.c_ospeed = sacomconsrate; 570 t.c_cflag = sacomconscflag; 571 } else { 572 t.c_ospeed = TTYDEF_SPEED; 573 t.c_cflag = TTYDEF_CFLAG; 574 } 575 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 576 SET(t.c_cflag, CLOCAL); 577 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 578 SET(t.c_cflag, CRTSCTS); 579 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 580 SET(t.c_cflag, MDMBUF); 581 /* Make sure sacomparam() will do something. */ 582 tp->t_ospeed = 0; 583 (void) sacomparam(tp, &t); 584 tp->t_iflag = TTYDEF_IFLAG; 585 tp->t_oflag = TTYDEF_OFLAG; 586 tp->t_lflag = TTYDEF_LFLAG; 587 ttychars(tp); 588 ttsetwater(tp); 589 590 s2 = splserial(); 591 COM_LOCK(sc); 592 593 /* 594 * Turn on DTR. We must always do this, even if carrier is not 595 * present, because otherwise we'd have to use TIOCSDTR 596 * immediately after setting CLOCAL, which applications do not 597 * expect. We always assert DTR while the device is open 598 * unless explicitly requested to deassert it. 599 */ 600 sacom_modem(sc, 1); 601 602 /* Clear the input ring, and unblock. */ 603 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 604 sc->sc_rbavail = SACOM_RING_SIZE; 605 sacom_iflush(sc); 606 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 607 sacom_hwiflow(sc); 608 609 #ifdef COM_DEBUG 610 if (sacom_debug) 611 comstatus(sc, "sacomopen "); 612 #endif 613 614 COM_UNLOCK(sc); 615 splx(s2); 616 } 617 618 splx(s); 619 620 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 621 if (error) 622 goto bad; 623 624 error = (*tp->t_linesw->l_open)(dev, tp); 625 if (error) 626 goto bad; 627 628 return (0); 629 630 bad: 631 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 632 /* 633 * We failed to open the device, and nobody else had it opened. 634 * Clean up the state as appropriate. 635 */ 636 sacom_shutdown(sc); 637 } 638 639 return (error); 640 } 641 642 int 643 sacomclose(dev_t dev, int flag, int mode, struct lwp *l) 644 { 645 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 646 struct tty *tp = sc->sc_tty; 647 648 /* XXX This is for cons.c. */ 649 if (!ISSET(tp->t_state, TS_ISOPEN)) 650 return (0); 651 652 (*tp->t_linesw->l_close)(tp, flag); 653 ttyclose(tp); 654 655 if (COM_ISALIVE(sc) == 0) 656 return (0); 657 658 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 659 /* 660 * Although we got a last close, the device may still be in 661 * use; e.g. if this was the dialout node, and there are still 662 * processes waiting for carrier on the non-dialout node. 663 */ 664 sacom_shutdown(sc); 665 } 666 667 return (0); 668 } 669 670 int 671 sacomread(dev_t dev, struct uio *uio, int flag) 672 { 673 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 674 struct tty *tp = sc->sc_tty; 675 676 if (COM_ISALIVE(sc) == 0) 677 return (EIO); 678 679 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 680 } 681 682 int 683 sacomwrite(dev_t dev, struct uio *uio, int flag) 684 { 685 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 686 struct tty *tp = sc->sc_tty; 687 688 if (COM_ISALIVE(sc) == 0) 689 return (EIO); 690 691 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 692 } 693 694 int 695 sacompoll(dev_t dev, int events, struct lwp *l) 696 { 697 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 698 struct tty *tp = sc->sc_tty; 699 700 if (COM_ISALIVE(sc) == 0) 701 return (EIO); 702 703 return ((*tp->t_linesw->l_poll)(tp, events, l)); 704 } 705 706 struct tty * 707 sacomtty(dev_t dev) 708 { 709 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 710 struct tty *tp = sc->sc_tty; 711 712 return (tp); 713 } 714 715 int 716 sacomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 717 { 718 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev)); 719 struct tty *tp = sc->sc_tty; 720 int error; 721 int s; 722 723 if (COM_ISALIVE(sc) == 0) 724 return (EIO); 725 726 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 727 if (error != EPASSTHROUGH) 728 return (error); 729 730 error = ttioctl(tp, cmd, data, flag, l); 731 if (error != EPASSTHROUGH) 732 return (error); 733 734 error = 0; 735 736 s = splserial(); 737 COM_LOCK(sc); 738 739 switch (cmd) { 740 case TIOCSBRK: 741 sacom_break(sc, 1); 742 break; 743 744 case TIOCCBRK: 745 sacom_break(sc, 0); 746 break; 747 748 case TIOCSDTR: 749 sacom_modem(sc, 1); 750 break; 751 752 case TIOCCDTR: 753 sacom_modem(sc, 0); 754 break; 755 756 case TIOCGFLAGS: 757 *(int *)data = sc->sc_swflags; 758 break; 759 760 case TIOCSFLAGS: 761 error = kauth_authorize_generic(l->l_proc->p_cred, KAUTH_GENERIC_ISSUSER, &l->l_proc->p_acflag); 762 if (error) 763 break; 764 sc->sc_swflags = *(int *)data; 765 break; 766 767 case TIOCMSET: 768 case TIOCMBIS: 769 case TIOCMBIC: 770 tiocm_to_sacom(sc, cmd, *(int *)data); 771 break; 772 773 case TIOCMGET: 774 *(int *)data = sacom_to_tiocm(sc); 775 break; 776 777 default: 778 error = EPASSTHROUGH; 779 break; 780 } 781 782 COM_UNLOCK(sc); 783 splx(s); 784 785 #ifdef COM_DEBUG 786 if (sacom_debug) 787 comstatus(sc, "comioctl "); 788 #endif 789 790 return (error); 791 } 792 793 static inline void 794 sacom_schedrx(struct sacom_softc *sc) 795 { 796 797 sc->sc_rx_ready = 1; 798 799 /* Wake up the poller. */ 800 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 801 softintr_schedule(sc->sc_si); 802 #else 803 setsoftserial(); 804 #endif 805 } 806 807 void 808 sacom_break(struct sacom_softc *sc, int onoff) 809 { 810 811 if (onoff) 812 SET(sc->sc_cr3, CR3_BRK); 813 else 814 CLR(sc->sc_cr3, CR3_BRK); 815 816 if (!sc->sc_heldchange) { 817 if (sc->sc_tx_busy) { 818 sc->sc_heldtbc = sc->sc_tbc; 819 sc->sc_tbc = 0; 820 sc->sc_heldchange = 1; 821 } else 822 sacom_loadchannelregs(sc); 823 } 824 } 825 826 void 827 sacom_modem(struct sacom_softc *sc, int onoff) 828 { 829 if (!sc->sc_heldchange) { 830 if (sc->sc_tx_busy) { 831 sc->sc_heldtbc = sc->sc_tbc; 832 sc->sc_tbc = 0; 833 sc->sc_heldchange = 1; 834 } else 835 sacom_loadchannelregs(sc); 836 } 837 } 838 839 void 840 tiocm_to_sacom(struct sacom_softc *sc, u_long how, int ttybits) 841 { 842 } 843 844 int 845 sacom_to_tiocm(struct sacom_softc *sc) 846 { 847 int ttybits = 0; 848 849 if (sc->sc_cr3 != 0) 850 SET(ttybits, TIOCM_LE); 851 852 return (ttybits); 853 } 854 855 static u_int 856 cflag2cr0(tcflag_t cflag) 857 { 858 u_int cr0; 859 860 cr0 = (cflag & PARENB) ? CR0_PE : 0; 861 cr0 |= (cflag & PARODD) ? 0 : CR0_OES; 862 cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0; 863 cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0; 864 865 return (cr0); 866 } 867 868 int 869 sacomparam(struct tty *tp, struct termios *t) 870 { 871 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 872 int ospeed = SACOMSPEED(t->c_ospeed); 873 u_int cr0; 874 int s; 875 876 if (COM_ISALIVE(sc) == 0) 877 return (EIO); 878 879 /* Check requested parameters. */ 880 if (ospeed < 0) 881 return (EINVAL); 882 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 883 return (EINVAL); 884 885 /* 886 * For the console, always force CLOCAL and !HUPCL, so that the port 887 * is always active. 888 */ 889 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 890 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 891 SET(t->c_cflag, CLOCAL); 892 CLR(t->c_cflag, HUPCL); 893 } 894 895 /* 896 * If there were no changes, don't do anything. This avoids dropping 897 * input and improves performance when all we did was frob things like 898 * VMIN and VTIME. 899 */ 900 if (tp->t_ospeed == t->c_ospeed && 901 tp->t_cflag == t->c_cflag) 902 return (0); 903 904 cr0 = cflag2cr0(t->c_cflag); 905 906 s = splserial(); 907 COM_LOCK(sc); 908 909 sc->sc_cr0 = cr0; 910 911 sc->sc_speed = ospeed; 912 913 /* And copy to tty. */ 914 tp->t_ispeed = 0; 915 tp->t_ospeed = t->c_ospeed; 916 tp->t_cflag = t->c_cflag; 917 918 if (!sc->sc_heldchange) { 919 if (sc->sc_tx_busy) { 920 sc->sc_heldtbc = sc->sc_tbc; 921 sc->sc_tbc = 0; 922 sc->sc_heldchange = 1; 923 } else 924 sacom_loadchannelregs(sc); 925 } 926 927 if (!ISSET(t->c_cflag, CHWFLOW)) { 928 /* Disable the high water mark. */ 929 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 930 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 931 sacom_schedrx(sc); 932 } 933 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 934 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 935 sacom_hwiflow(sc); 936 } 937 } 938 939 COM_UNLOCK(sc); 940 splx(s); 941 942 (void) (*tp->t_linesw->l_modem)(tp, 1); 943 944 #ifdef COM_DEBUG 945 if (sacom_debug) 946 comstatus(sc, "comparam "); 947 #endif 948 949 return (0); 950 } 951 952 void 953 sacom_iflush(struct sacom_softc *sc) 954 { 955 bus_space_tag_t iot = sc->sc_iot; 956 bus_space_handle_t ioh = sc->sc_ioh; 957 #ifdef DIAGNOSTIC 958 int reg; 959 #endif 960 int timo; 961 962 #ifdef DIAGNOSTIC 963 reg = 0xffff; 964 #endif 965 timo = 50; 966 /* flush any pending I/O */ 967 if (sc->sc_cr3 & CR3_RXE) { 968 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE) 969 && --timo) 970 #ifdef DIAGNOSTIC 971 reg = 972 #else 973 (void) 974 #endif 975 bus_space_read_4(iot, ioh, SACOM_DR); 976 } 977 #if 0 978 /* XXX is it good idea to wait TX finish? */ 979 if (sc->sc_cr3 & CR3_TXE) { 980 timo = 500; 981 while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY) 982 && --timo) 983 delay(100); 984 } 985 #endif 986 #ifdef DIAGNOSTIC 987 if (!timo) 988 printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname, 989 reg); 990 #endif 991 } 992 993 void 994 sacom_loadchannelregs(struct sacom_softc *sc) 995 { 996 bus_space_tag_t iot = sc->sc_iot; 997 bus_space_handle_t ioh = sc->sc_ioh; 998 999 /* XXXXX necessary? */ 1000 sacom_iflush(sc); 1001 1002 /* Need to stop engines first. */ 1003 bus_space_write_4(iot, ioh, SACOM_CR3, 0); 1004 1005 bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8); 1006 bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff); 1007 1008 bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0); 1009 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1010 } 1011 1012 int 1013 sacomhwiflow(struct tty *tp, int block) 1014 { 1015 #if 0 1016 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1017 int s; 1018 1019 if (COM_ISALIVE(sc) == 0) 1020 return (0); 1021 1022 if (sc->sc_mcr_rts == 0) 1023 return (0); 1024 1025 s = splserial(); 1026 COM_LOCK(sc); 1027 1028 if (block) { 1029 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1030 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1031 sacom_hwiflow(sc); 1032 } 1033 } else { 1034 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1035 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1036 sacom_schedrx(sc); 1037 } 1038 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1039 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1040 sacom_hwiflow(sc); 1041 } 1042 } 1043 1044 COM_UNLOCK(sc); 1045 splx(s); 1046 #endif 1047 return (1); 1048 } 1049 1050 /* 1051 * (un)block input via hw flowcontrol 1052 */ 1053 void 1054 sacom_hwiflow(struct sacom_softc *sc) 1055 { 1056 #if 0 1057 bus_space_tag_t iot = sc->sc_iot; 1058 bus_space_handle_t ioh = sc->sc_ioh; 1059 1060 /* XXX implement */ 1061 #endif 1062 } 1063 1064 1065 void 1066 sacomstart(struct tty *tp) 1067 { 1068 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1069 bus_space_tag_t iot = sc->sc_iot; 1070 bus_space_handle_t ioh = sc->sc_ioh; 1071 int s; 1072 1073 if (COM_ISALIVE(sc) == 0) 1074 return; 1075 1076 s = spltty(); 1077 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1078 goto out; 1079 1080 if (tp->t_outq.c_cc <= tp->t_lowat) { 1081 if (ISSET(tp->t_state, TS_ASLEEP)) { 1082 CLR(tp->t_state, TS_ASLEEP); 1083 wakeup(&tp->t_outq); 1084 } 1085 selwakeup(&tp->t_wsel); 1086 if (tp->t_outq.c_cc == 0) 1087 goto out; 1088 } 1089 1090 /* Grab the first contiguous region of buffer space. */ 1091 { 1092 u_char *tba; 1093 int tbc; 1094 1095 tba = tp->t_outq.c_cf; 1096 tbc = ndqb(&tp->t_outq, 0); 1097 1098 (void)splserial(); 1099 COM_LOCK(sc); 1100 1101 sc->sc_tba = tba; 1102 sc->sc_tbc = tbc; 1103 } 1104 1105 SET(tp->t_state, TS_BUSY); 1106 sc->sc_tx_busy = 1; 1107 1108 /* Enable transmit completion interrupts if necessary. */ 1109 if (!ISSET(sc->sc_cr3, CR3_TIE)) { 1110 SET(sc->sc_cr3, CR3_TIE); 1111 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1112 } 1113 1114 /* Output the first chunk of the contiguous buffer. */ 1115 sacom_filltx(sc); 1116 1117 COM_UNLOCK(sc); 1118 out: 1119 splx(s); 1120 return; 1121 } 1122 1123 void 1124 sacom_filltx(struct sacom_softc *sc) 1125 { 1126 bus_space_tag_t iot = sc->sc_iot; 1127 bus_space_handle_t ioh = sc->sc_ioh; 1128 int c, n; 1129 1130 n = 0; 1131 while(bus_space_read_4(iot, ioh, SACOM_SR1) 1132 & SR1_TNF) { 1133 if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc) 1134 break; 1135 c = *(sc->sc_tba + n); 1136 c &= 0xff; 1137 bus_space_write_4(iot, ioh, SACOM_DR, c); 1138 n++; 1139 } 1140 sc->sc_tbc -= n; 1141 sc->sc_tba += n; 1142 } 1143 1144 /* 1145 * Stop output on a line. 1146 */ 1147 void 1148 sacomstop(struct tty *tp, int flag) 1149 { 1150 struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev)); 1151 int s; 1152 1153 s = splserial(); 1154 COM_LOCK(sc); 1155 if (ISSET(tp->t_state, TS_BUSY)) { 1156 /* Stop transmitting at the next chunk. */ 1157 sc->sc_tbc = 0; 1158 sc->sc_heldtbc = 0; 1159 if (!ISSET(tp->t_state, TS_TTSTOP)) 1160 SET(tp->t_state, TS_FLUSH); 1161 } 1162 COM_UNLOCK(sc); 1163 splx(s); 1164 } 1165 1166 static inline void 1167 sacom_rxsoft(struct sacom_softc *sc, struct tty *tp) 1168 { 1169 int (*rint)(int, struct tty *) = tp->t_linesw->l_rint; 1170 u_char *get, *end; 1171 u_int cc, scc; 1172 u_char sr1; 1173 int code; 1174 int s; 1175 1176 end = sc->sc_ebuf; 1177 get = sc->sc_rbget; 1178 scc = cc = SACOM_RING_SIZE - sc->sc_rbavail; 1179 1180 while (cc) { 1181 code = get[0]; 1182 sr1 = get[1]; 1183 if (ISSET(sr1, SR1_FRE)) 1184 SET(code, TTY_FE); 1185 if (ISSET(sr1, SR1_PRE)) 1186 SET(code, TTY_PE); 1187 if ((*rint)(code, tp) == -1) { 1188 /* 1189 * The line discipline's buffer is out of space. 1190 */ 1191 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1192 /* 1193 * We're either not using flow control, or the 1194 * line discipline didn't tell us to block for 1195 * some reason. Either way, we have no way to 1196 * know when there's more space available, so 1197 * just drop the rest of the data. 1198 */ 1199 get += cc << 1; 1200 if (get >= end) 1201 get -= SACOM_RING_SIZE << 1; 1202 cc = 0; 1203 } else { 1204 /* 1205 * Don't schedule any more receive processing 1206 * until the line discipline tells us there's 1207 * space available (through comhwiflow()). 1208 * Leave the rest of the data in the input 1209 * buffer. 1210 */ 1211 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1212 } 1213 break; 1214 } 1215 get += 2; 1216 if (get >= end) 1217 get = sc->sc_rbuf; 1218 cc--; 1219 } 1220 1221 if (cc != scc) { 1222 sc->sc_rbget = get; 1223 s = splserial(); 1224 COM_LOCK(sc); 1225 1226 cc = sc->sc_rbavail += scc - cc; 1227 /* Buffers should be ok again, release possible block. */ 1228 if (cc >= 1) { 1229 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1230 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1231 SET(sc->sc_cr3, CR3_RIE); 1232 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 1233 SACOM_CR3, sc->sc_cr3); 1234 } 1235 } 1236 COM_UNLOCK(sc); 1237 splx(s); 1238 } 1239 } 1240 1241 static inline void 1242 sacom_txsoft(struct sacom_softc *sc, struct tty *tp) 1243 { 1244 1245 CLR(tp->t_state, TS_BUSY); 1246 if (ISSET(tp->t_state, TS_FLUSH)) 1247 CLR(tp->t_state, TS_FLUSH); 1248 else 1249 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1250 (*tp->t_linesw->l_start)(tp); 1251 } 1252 1253 static inline void 1254 sacom_stsoft(struct sacom_softc *sc, struct tty *tp) 1255 { 1256 } 1257 1258 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1259 void 1260 sacomsoft(void *arg) 1261 { 1262 struct sacom_softc *sc = arg; 1263 struct tty *tp; 1264 1265 if (COM_ISALIVE(sc) == 0) 1266 return; 1267 1268 { 1269 #else 1270 void 1271 sacomsoft(void) 1272 { 1273 struct sacom_softc *sc; 1274 struct tty *tp; 1275 int unit; 1276 1277 for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) { 1278 sc = device_lookup(&sacom_cd, unit); 1279 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1280 continue; 1281 1282 if (COM_ISALIVE(sc) == 0) 1283 continue; 1284 1285 tp = sc->sc_tty; 1286 if (tp == NULL) 1287 continue; 1288 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1289 continue; 1290 #endif 1291 tp = sc->sc_tty; 1292 1293 if (sc->sc_rx_ready) { 1294 sc->sc_rx_ready = 0; 1295 sacom_rxsoft(sc, tp); 1296 } 1297 1298 if (sc->sc_st_check) { 1299 sc->sc_st_check = 0; 1300 sacom_stsoft(sc, tp); 1301 } 1302 1303 if (sc->sc_tx_done) { 1304 sc->sc_tx_done = 0; 1305 sacom_txsoft(sc, tp); 1306 } 1307 } 1308 1309 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 1310 #endif 1311 } 1312 1313 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1314 /* there has got to be a better way to do comsoft() */ 1315 }} 1316 #endif 1317 1318 int 1319 sacomintr(void *arg) 1320 { 1321 struct sacom_softc *sc = arg; 1322 bus_space_tag_t iot = sc->sc_iot; 1323 bus_space_handle_t ioh = sc->sc_ioh; 1324 u_char *put, *end; 1325 u_int cc; 1326 u_int sr0, sr1; 1327 1328 if (COM_ISALIVE(sc) == 0) 1329 return (0); 1330 1331 COM_LOCK(sc); 1332 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1333 if (! sr0) { 1334 COM_UNLOCK(sc); 1335 return (0); 1336 } 1337 if (ISSET(sr0, SR0_EIF)) 1338 /* XXX silently discard error bits */ 1339 bus_space_read_4(iot, ioh, SACOM_DR); 1340 if (ISSET(sr0, SR0_RBB)) 1341 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB); 1342 if (ISSET(sr0, SR0_REB)) { 1343 bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB); 1344 #if defined(DDB) || defined(KGDB) 1345 #ifndef DDB_BREAK_CHAR 1346 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1347 console_debugger(); 1348 } 1349 #endif 1350 #endif /* DDB || KGDB */ 1351 } 1352 1353 1354 end = sc->sc_ebuf; 1355 put = sc->sc_rbput; 1356 cc = sc->sc_rbavail; 1357 1358 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1359 if (ISSET(sr0, SR0_RFS | SR0_RID)) { 1360 if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1361 while (cc > 0) { 1362 if (!ISSET(sr1, SR1_RNE)) { 1363 bus_space_write_4(iot, ioh, SACOM_SR0, 1364 SR0_RID); 1365 break; 1366 } 1367 put[0] = bus_space_read_4(iot, ioh, SACOM_DR); 1368 put[1] = sr1; 1369 #if defined(DDB) && defined(DDB_BREAK_CHAR) 1370 if (put[0] == DDB_BREAK_CHAR && 1371 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1372 console_debugger(); 1373 1374 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1375 continue; 1376 } 1377 #endif 1378 put += 2; 1379 if (put >= end) 1380 put = sc->sc_rbuf; 1381 cc--; 1382 1383 sr1 = bus_space_read_4(iot, ioh, SACOM_SR1); 1384 } 1385 1386 /* 1387 * Current string of incoming characters ended because 1388 * no more data was available or we ran out of space. 1389 * Schedule a receive event if any data was received. 1390 * If we're out of space, turn off receive interrupts. 1391 */ 1392 sc->sc_rbput = put; 1393 sc->sc_rbavail = cc; 1394 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1395 sc->sc_rx_ready = 1; 1396 1397 /* XXX do RX hardware flow control */ 1398 1399 /* 1400 * If we're out of space, disable receive interrupts 1401 * until the queue has drained a bit. 1402 */ 1403 if (!cc) { 1404 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1405 CLR(sc->sc_cr3, CR3_RIE); 1406 bus_space_write_4(iot, ioh, SACOM_CR3, 1407 sc->sc_cr3); 1408 } 1409 } else { 1410 #ifdef DIAGNOSTIC 1411 panic("sacomintr: we shouldn't reach here"); 1412 #endif 1413 CLR(sc->sc_cr3, CR3_RIE); 1414 bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3); 1415 } 1416 } 1417 1418 /* 1419 * Done handling any receive interrupts. See if data can be 1420 * transmitted as well. Schedule tx done event if no data left 1421 * and tty was marked busy. 1422 */ 1423 sr0 = bus_space_read_4(iot, ioh, SACOM_SR0); 1424 if (ISSET(sr0, SR0_TFS)) { 1425 /* 1426 * If we've delayed a parameter change, do it now, and restart 1427 * output. 1428 * XXX sacom_loadchanelregs() waits TX completion, 1429 * XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case 1430 */ 1431 if (sc->sc_heldchange) { 1432 sacom_loadchannelregs(sc); 1433 sc->sc_heldchange = 0; 1434 sc->sc_tbc = sc->sc_heldtbc; 1435 sc->sc_heldtbc = 0; 1436 } 1437 1438 /* Output the next chunk of the contiguous buffer, if any. */ 1439 if (sc->sc_tbc > 0) { 1440 sacom_filltx(sc); 1441 } else { 1442 /* Disable transmit completion interrupts if necessary. */ 1443 if (ISSET(sc->sc_cr3, CR3_TIE)) { 1444 CLR(sc->sc_cr3, CR3_TIE); 1445 bus_space_write_4(iot, ioh, SACOM_CR3, 1446 sc->sc_cr3); 1447 } 1448 if (sc->sc_tx_busy) { 1449 sc->sc_tx_busy = 0; 1450 sc->sc_tx_done = 1; 1451 } 1452 } 1453 } 1454 COM_UNLOCK(sc); 1455 1456 /* Wake up the poller. */ 1457 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 1458 softintr_schedule(sc->sc_si); 1459 #else 1460 setsoftserial(); 1461 #endif 1462 1463 #if NRND > 0 && defined(RND_COM) 1464 rnd_add_uint32(&sc->rnd_source, iir | lsr); 1465 #endif 1466 return (1); 1467 } 1468 1469 static void 1470 sacom_j720_init(struct sa11x0_softc *parent, struct sacom_softc *sc) { 1471 1472 /* XXX this should be done at sc->enable function */ 1473 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1474 SAGPIO_PCR, 0xa0000); 1475 bus_space_write_4(parent->sc_iot, parent->sc_gpioh, 1476 SAGPIO_PSR, 0x100); 1477 } 1478 1479 /* Initialization for serial console */ 1480 int 1481 sacominit(bus_space_tag_t iot, bus_addr_t iobase, int baud, tcflag_t cflag, 1482 bus_space_handle_t *iohp) 1483 { 1484 int brd, cr0; 1485 1486 if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp)) 1487 printf("register map failed\n"); 1488 1489 /* wait for the Tx queue to drain and disable the UART */ 1490 while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY) 1491 ; 1492 bus_space_write_4(iot, *iohp, SACOM_CR3, 0); 1493 1494 cr0 = cflag2cr0(cflag); 1495 bus_space_write_4(iot, *iohp, SACOM_CR0, cr0); 1496 1497 brd = SACOMSPEED(baud); 1498 sacomconsrate = baud; 1499 sacomconsaddr = iobase; 1500 sacomconscflag = cflag; 1501 /* XXX assumes little endian */ 1502 bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8); 1503 bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff); 1504 1505 /* enable the UART */ 1506 bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE); 1507 1508 return (0); 1509 } 1510 1511 void 1512 sacomcnprobe(struct consdev *cp) 1513 { 1514 cp->cn_pri = CN_REMOTE; 1515 } 1516 1517 void 1518 sacomcninit(struct consdev *cp) 1519 { 1520 if (cp == NULL) { 1521 /* XXX cp == NULL means that MMU is disabled. */ 1522 sacomconsioh = SACOM3_BASE; 1523 sacomconstag = &sa11x0_bs_tag; 1524 cn_tab = &sacomcons; 1525 return; 1526 } 1527 1528 if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED, 1529 CONMODE, &sacomconsioh)) 1530 panic("can't init serial console @%x", CONADDR); 1531 cn_tab = &sacomcons; 1532 sacomconstag = &sa11x0_bs_tag; 1533 } 1534 1535 int 1536 sacomcngetc(dev_t dev) 1537 { 1538 int c, s; 1539 1540 s = spltty(); /* XXX do we need this? */ 1541 1542 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1543 & SR1_RNE)) { 1544 #if defined(DDB) || defined(KGDB) 1545 #ifndef DDB_BREAK_CHAR 1546 u_int sr0; 1547 extern int db_active; 1548 1549 sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0); 1550 if (ISSET(sr0, SR0_RBB)) 1551 bus_space_write_4(sacomconstag, sacomconsioh, 1552 SACOM_SR0, SR0_RBB); 1553 if (ISSET(sr0, SR0_REB)) { 1554 bus_space_write_4(sacomconstag, sacomconsioh, 1555 SACOM_SR0, SR0_REB); 1556 if (db_active == 0) 1557 console_debugger(); 1558 } 1559 #endif 1560 #endif /* DDB || KGDB */ 1561 } 1562 1563 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1564 c &= 0xff; 1565 splx(s); 1566 1567 return (c); 1568 } 1569 1570 void 1571 sacomcnputc(dev_t dev, int c) 1572 { 1573 int s; 1574 1575 s = spltty(); /* XXX do we need this? */ 1576 1577 while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1578 & SR1_TNF)) 1579 ; 1580 1581 bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c); 1582 splx(s); 1583 } 1584 1585 void 1586 sacomcnpollc(dev_t dev, int on) 1587 { 1588 1589 } 1590 1591 #if 0 1592 #ifdef DEBUG 1593 int 1594 sacomcncharpoll(void) 1595 { 1596 int c; 1597 1598 if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1) 1599 & SR1_RNE)) 1600 return -1; 1601 1602 c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR); 1603 c &= 0xff; 1604 1605 return (c); 1606 } 1607 #endif 1608 #endif 1609 1610 /* helper function to identify the com ports used by 1611 console or KGDB (and not yet autoconf attached) */ 1612 int 1613 sacom_is_console(bus_space_tag_t iot, bus_addr_t iobase, 1614 bus_space_handle_t *ioh) 1615 { 1616 bus_space_handle_t help; 1617 1618 if (! sacomconsattached && 1619 iot == sacomconstag && iobase == sacomconsaddr) 1620 help = sacomconsioh; 1621 else 1622 return (0); 1623 1624 if (ioh) 1625 *ioh = help; 1626 return (1); 1627 } 1628
Indexes created Thu Oct 02 14:10:14 GMT 2025