com.c revision 1.149
1 /* $NetBSD: com.c,v 1.149 1998/11/18 23:58:52 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1991 The Regents of the University of California. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)com.c 7.5 (Berkeley) 5/16/91 72 */ 73 74 /* 75 * COM driver, uses National Semiconductor NS16450/NS16550AF UART 76 * Supports automatic hardware flow control on StarTech ST16C650A UART 77 */ 78 79 #include "opt_ddb.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/ioctl.h> 89 #include <sys/select.h> 90 #include <sys/tty.h> 91 #include <sys/proc.h> 92 #include <sys/user.h> 93 #include <sys/conf.h> 94 #include <sys/file.h> 95 #include <sys/uio.h> 96 #include <sys/kernel.h> 97 #include <sys/syslog.h> 98 #include <sys/types.h> 99 #include <sys/device.h> 100 #include <sys/malloc.h> 101 #include <sys/timepps.h> 102 #include <sys/vnode.h> 103 104 #include <machine/intr.h> 105 #include <machine/bus.h> 106 107 #include <dev/ic/comreg.h> 108 #include <dev/ic/comvar.h> 109 #include <dev/ic/ns16550reg.h> 110 #include <dev/ic/st16650reg.h> 111 #ifdef COM_HAYESP 112 #include <dev/ic/hayespreg.h> 113 #endif 114 #define com_lcr com_cfcr 115 #include <dev/cons.h> 116 117 #include "com.h" 118 119 #ifdef COM_HAYESP 120 int comprobeHAYESP __P((bus_space_handle_t hayespioh, struct com_softc *sc)); 121 #endif 122 123 #if defined(DDB) || defined(KGDB) 124 static void com_enable_debugport __P((struct com_softc *)); 125 #endif 126 void com_attach_subr __P((struct com_softc *sc)); 127 void com_config __P((struct com_softc *)); 128 void com_shutdown __P((struct com_softc *)); 129 int comspeed __P((long, long)); 130 static u_char cflag2lcr __P((tcflag_t)); 131 int comparam __P((struct tty *, struct termios *)); 132 void comstart __P((struct tty *)); 133 void comstop __P((struct tty *, int)); 134 int comhwiflow __P((struct tty *, int)); 135 136 void com_loadchannelregs __P((struct com_softc *)); 137 void com_hwiflow __P((struct com_softc *)); 138 void com_break __P((struct com_softc *, int)); 139 void com_modem __P((struct com_softc *, int)); 140 void com_iflush __P((struct com_softc *)); 141 142 int com_common_getc __P((bus_space_tag_t, bus_space_handle_t)); 143 void com_common_putc __P((bus_space_tag_t, bus_space_handle_t, int)); 144 145 /* XXX: These belong elsewhere */ 146 cdev_decl(com); 147 bdev_decl(com); 148 149 int comcngetc __P((dev_t)); 150 void comcnputc __P((dev_t, int)); 151 void comcnpollc __P((dev_t, int)); 152 153 #define integrate static inline 154 #ifdef __GENERIC_SOFT_INTERRUPTS 155 void comsoft __P((void *)); 156 #else 157 #ifndef __NO_SOFT_SERIAL_INTERRUPT 158 void comsoft __P((void)); 159 #else 160 void comsoft __P((void *)); 161 #endif 162 #endif 163 integrate void com_rxsoft __P((struct com_softc *, struct tty *)); 164 integrate void com_txsoft __P((struct com_softc *, struct tty *)); 165 integrate void com_stsoft __P((struct com_softc *, struct tty *)); 166 integrate void com_schedrx __P((struct com_softc *)); 167 void comdiag __P((void *)); 168 169 extern struct cfdriver com_cd; 170 171 /* 172 * Make this an option variable one can patch. 173 * But be warned: this must be a power of 2! 174 */ 175 u_int com_rbuf_size = COM_RING_SIZE; 176 177 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 178 u_int com_rbuf_hiwat = (COM_RING_SIZE * 1) / 4; 179 u_int com_rbuf_lowat = (COM_RING_SIZE * 3) / 4; 180 181 static int comconsaddr; 182 static bus_space_tag_t comconstag; 183 static bus_space_handle_t comconsioh; 184 static int comconsattached; 185 static int comconsrate; 186 static tcflag_t comconscflag; 187 188 static int ppscap = 189 PPS_TSFMT_TSPEC | 190 PPS_CAPTUREASSERT | 191 PPS_CAPTURECLEAR | 192 #ifdef PPS_SYNC 193 PPS_HARDPPSONASSERT | PPS_HARDPPSONCLEAR | 194 #endif /* PPS_SYNC */ 195 PPS_OFFSETASSERT | PPS_OFFSETCLEAR; 196 197 static u_char tiocm_xxx2mcr __P((int)); 198 199 #ifndef __GENERIC_SOFT_INTERRUPTS 200 #ifdef __NO_SOFT_SERIAL_INTERRUPT 201 volatile int com_softintr_scheduled; 202 #endif 203 #endif 204 205 #ifdef KGDB 206 #include <sys/kgdb.h> 207 208 static int com_kgdb_addr; 209 static bus_space_tag_t com_kgdb_iot; 210 static bus_space_handle_t com_kgdb_ioh; 211 static int com_kgdb_attached; 212 213 int com_kgdb_getc __P((void *)); 214 void com_kgdb_putc __P((void *, int)); 215 #endif /* KGDB */ 216 217 #define COMUNIT_MASK 0x7ffff 218 #define COMDIALOUT_MASK 0x80000 219 220 #define COMUNIT(x) (minor(x) & COMUNIT_MASK) 221 #define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK) 222 223 #define COM_ISALIVE(sc) ((sc)->enabled != 0 && \ 224 ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE)) 225 226 int 227 comspeed(speed, frequency) 228 long speed, frequency; 229 { 230 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 231 232 int x, err; 233 234 #if 0 235 if (speed == 0) 236 return (0); 237 #endif 238 if (speed <= 0) 239 return (-1); 240 x = divrnd(frequency / 16, speed); 241 if (x <= 0) 242 return (-1); 243 err = divrnd(((quad_t)frequency) * 1000 / 16, speed * x) - 1000; 244 if (err < 0) 245 err = -err; 246 if (err > COM_TOLERANCE) 247 return (-1); 248 return (x); 249 250 #undef divrnd(n, q) 251 } 252 253 #ifdef COM_DEBUG 254 int com_debug = 0; 255 256 void comstatus __P((struct com_softc *, char *)); 257 void 258 comstatus(sc, str) 259 struct com_softc *sc; 260 char *str; 261 { 262 struct tty *tp = sc->sc_tty; 263 264 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 265 sc->sc_dev.dv_xname, str, 266 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 267 ISSET(sc->sc_msr, MSR_DCD) ? "+" : "-", 268 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 269 ISSET(sc->sc_mcr, MCR_DTR) ? "+" : "-", 270 sc->sc_tx_stopped ? "+" : "-"); 271 272 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %xrx_flags\n", 273 sc->sc_dev.dv_xname, str, 274 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 275 ISSET(sc->sc_msr, MSR_CTS) ? "+" : "-", 276 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 277 ISSET(sc->sc_mcr, MCR_RTS) ? "+" : "-", 278 sc->sc_rx_flags); 279 } 280 #endif 281 282 int 283 comprobe1(iot, ioh) 284 bus_space_tag_t iot; 285 bus_space_handle_t ioh; 286 { 287 288 /* force access to id reg */ 289 bus_space_write_1(iot, ioh, com_lcr, 0); 290 bus_space_write_1(iot, ioh, com_iir, 0); 291 if (bus_space_read_1(iot, ioh, com_iir) & 0x38) 292 return (0); 293 294 return (1); 295 } 296 297 #ifdef COM_HAYESP 298 int 299 comprobeHAYESP(hayespioh, sc) 300 bus_space_handle_t hayespioh; 301 struct com_softc *sc; 302 { 303 char val, dips; 304 int combaselist[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 }; 305 bus_space_tag_t iot = sc->sc_iot; 306 307 /* 308 * Hayes ESP cards have two iobases. One is for compatibility with 309 * 16550 serial chips, and at the same ISA PC base addresses. The 310 * other is for ESP-specific enhanced features, and lies at a 311 * different addressing range entirely (0x140, 0x180, 0x280, or 0x300). 312 */ 313 314 /* Test for ESP signature */ 315 if ((bus_space_read_1(iot, hayespioh, 0) & 0xf3) == 0) 316 return (0); 317 318 /* 319 * ESP is present at ESP enhanced base address; unknown com port 320 */ 321 322 /* Get the dip-switch configurations */ 323 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETDIPS); 324 dips = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); 325 326 /* Determine which com port this ESP card services: bits 0,1 of */ 327 /* dips is the port # (0-3); combaselist[val] is the com_iobase */ 328 if (sc->sc_iobase != combaselist[dips & 0x03]) 329 return (0); 330 331 printf(": ESP"); 332 333 /* Check ESP Self Test bits. */ 334 /* Check for ESP version 2.0: bits 4,5,6 == 010 */ 335 bus_space_write_1(iot, hayespioh, HAYESP_CMD1, HAYESP_GETTEST); 336 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS1); /* Clear reg1 */ 337 val = bus_space_read_1(iot, hayespioh, HAYESP_STATUS2); 338 if ((val & 0x70) < 0x20) { 339 printf("-old (%o)", val & 0x70); 340 /* we do not support the necessary features */ 341 return (0); 342 } 343 344 /* Check for ability to emulate 16550: bit 8 == 1 */ 345 if ((dips & 0x80) == 0) { 346 printf(" slave"); 347 /* XXX Does slave really mean no 16550 support?? */ 348 return (0); 349 } 350 351 /* 352 * If we made it this far, we are a full-featured ESP v2.0 (or 353 * better), at the correct com port address. 354 */ 355 356 SET(sc->sc_hwflags, COM_HW_HAYESP); 357 printf(", 1024 byte fifo\n"); 358 return (1); 359 } 360 #endif 361 362 #if defined(DDB) || defined(KGDB) 363 static void 364 com_enable_debugport(sc) 365 struct com_softc *sc; 366 { 367 int s; 368 369 /* Turn on line break interrupt, set carrier. */ 370 s = splserial(); 371 sc->sc_ier = IER_ERXRDY; 372 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_ier, sc->sc_ier); 373 SET(sc->sc_mcr, MCR_DTR | MCR_RTS); 374 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_mcr, sc->sc_mcr); 375 splx(s); 376 } 377 #endif 378 379 void 380 com_attach_subr(sc) 381 struct com_softc *sc; 382 { 383 int iobase = sc->sc_iobase; 384 bus_space_tag_t iot = sc->sc_iot; 385 bus_space_handle_t ioh = sc->sc_ioh; 386 struct tty *tp; 387 #ifdef COM16650 388 u_int8_t lcr; 389 #endif 390 #ifdef COM_HAYESP 391 int hayesp_ports[] = { 0x140, 0x180, 0x280, 0x300, 0 }; 392 int *hayespp; 393 #endif 394 395 /* Disable interrupts before configuring the device. */ 396 sc->sc_ier = 0; 397 bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); 398 399 if (iot == comconstag && iobase == comconsaddr) { 400 comconsattached = 1; 401 402 /* Make sure the console is always "hardwired". */ 403 delay(1000); /* wait for output to finish */ 404 SET(sc->sc_hwflags, COM_HW_CONSOLE); 405 SET(sc->sc_swflags, TIOCFLAG_SOFTCAR); 406 } 407 408 #ifdef COM_HAYESP 409 /* Look for a Hayes ESP board. */ 410 for (hayespp = hayesp_ports; *hayespp != 0; hayespp++) { 411 bus_space_handle_t hayespioh; 412 413 #define HAYESP_NPORTS 8 /* XXX XXX XXX ??? ??? ??? */ 414 if (bus_space_map(iot, *hayespp, HAYESP_NPORTS, 0, &hayespioh)) 415 continue; 416 if (comprobeHAYESP(hayespioh, sc)) { 417 sc->sc_hayespioh = hayespioh; 418 sc->sc_fifolen = 1024; 419 420 break; 421 } 422 bus_space_unmap(iot, hayespioh, HAYESP_NPORTS); 423 } 424 /* No ESP; look for other things. */ 425 if (!ISSET(sc->sc_hwflags, COM_HW_HAYESP)) { 426 #endif 427 sc->sc_fifolen = 1; 428 /* look for a NS 16550AF UART with FIFOs */ 429 bus_space_write_1(iot, ioh, com_fifo, 430 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14); 431 delay(100); 432 if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) 433 == IIR_FIFO_MASK) 434 if (ISSET(bus_space_read_1(iot, ioh, com_fifo), FIFO_TRIGGER_14) 435 == FIFO_TRIGGER_14) { 436 SET(sc->sc_hwflags, COM_HW_FIFO); 437 438 #ifdef COM16650 439 /* 440 * IIR changes into the EFR if LCR is set to LCR_EERS 441 * on 16650s. We also know IIR != 0 at this point. 442 * Write 0 into the EFR, and read it. If the result 443 * is 0, we have a 16650. 444 * 445 * Older 16650s were broken; the test to detect them 446 * is taken from the Linux driver. Apparently 447 * setting DLAB enable gives access to the EFR on 448 * these chips. 449 */ 450 lcr = bus_space_read_1(iot, ioh, com_lcr); 451 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 452 bus_space_write_1(iot, ioh, com_efr, 0); 453 if (bus_space_read_1(iot, ioh, com_efr) == 0) { 454 bus_space_write_1(iot, ioh, com_lcr, 455 lcr | LCR_DLAB); 456 if (bus_space_read_1(iot, ioh, com_efr) == 0) { 457 CLR(sc->sc_hwflags, COM_HW_FIFO); 458 sc->sc_fifolen = 0; 459 } else { 460 SET(sc->sc_hwflags, COM_HW_FLOW); 461 sc->sc_fifolen = 32; 462 } 463 } else 464 #endif 465 sc->sc_fifolen = 16; 466 467 #ifdef COM16650 468 bus_space_write_1(iot, ioh, com_lcr, lcr); 469 if (sc->sc_fifolen == 0) 470 printf(": st16650, broken fifo\n"); 471 else if (sc->sc_fifolen == 32) 472 printf(": st16650a, working fifo\n"); 473 else 474 #endif 475 printf(": ns16550a, working fifo\n"); 476 } else 477 printf(": ns16550, broken fifo\n"); 478 else 479 printf(": ns8250 or ns16450, no fifo\n"); 480 bus_space_write_1(iot, ioh, com_fifo, 0); 481 #ifdef COM_HAYESP 482 } 483 #endif 484 485 tp = ttymalloc(); 486 tp->t_oproc = comstart; 487 tp->t_param = comparam; 488 tp->t_hwiflow = comhwiflow; 489 490 sc->sc_tty = tp; 491 sc->sc_rbuf = malloc(com_rbuf_size << 1, M_DEVBUF, M_NOWAIT); 492 if (sc->sc_rbuf == NULL) { 493 printf("%s: unable to allocate ring buffer\n", 494 sc->sc_dev.dv_xname); 495 return; 496 } 497 sc->sc_ebuf = sc->sc_rbuf + (com_rbuf_size << 1); 498 499 tty_attach(tp); 500 501 if (!ISSET(sc->sc_hwflags, COM_HW_NOIEN)) 502 SET(sc->sc_mcr, MCR_IENABLE); 503 504 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 505 int maj; 506 507 /* locate the major number */ 508 for (maj = 0; maj < nchrdev; maj++) 509 if (cdevsw[maj].d_open == comopen) 510 break; 511 512 cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit); 513 514 printf("%s: console\n", sc->sc_dev.dv_xname); 515 } 516 517 #ifdef KGDB 518 /* 519 * Allow kgdb to "take over" this port. If this is 520 * the kgdb device, it has exclusive use. 521 */ 522 if (iot == com_kgdb_iot && iobase == com_kgdb_addr) { 523 com_kgdb_attached = 1; 524 525 SET(sc->sc_hwflags, COM_HW_KGDB); 526 printf("%s: kgdb\n", sc->sc_dev.dv_xname); 527 } 528 #endif 529 530 #ifdef __GENERIC_SOFT_INTERRUPTS 531 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, comsoft, sc); 532 #endif 533 534 #if NRND > 0 && defined(RND_COM) 535 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 536 RND_TYPE_TTY); 537 #endif 538 539 /* if there are no enable/disable functions, assume the device 540 is always enabled */ 541 if (!sc->enable) 542 sc->enabled = 1; 543 544 com_config(sc); 545 546 SET(sc->sc_hwflags, COM_HW_DEV_OK); 547 } 548 549 void 550 com_config(sc) 551 struct com_softc *sc; 552 { 553 bus_space_tag_t iot = sc->sc_iot; 554 bus_space_handle_t ioh = sc->sc_ioh; 555 556 /* Disable interrupts before configuring the device. */ 557 sc->sc_ier = 0; 558 bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); 559 560 #ifdef COM_HAYESP 561 /* Look for a Hayes ESP board. */ 562 if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) { 563 sc->sc_fifolen = 1024; 564 565 /* Set 16550 compatibility mode */ 566 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD1, 567 HAYESP_SETMODE); 568 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 569 HAYESP_MODE_FIFO|HAYESP_MODE_RTS| 570 HAYESP_MODE_SCALE); 571 572 /* Set RTS/CTS flow control */ 573 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD1, 574 HAYESP_SETFLOWTYPE); 575 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 576 HAYESP_FLOW_RTS); 577 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 578 HAYESP_FLOW_CTS); 579 580 /* Set flow control levels */ 581 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD1, 582 HAYESP_SETRXFLOW); 583 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 584 HAYESP_HIBYTE(HAYESP_RXHIWMARK)); 585 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 586 HAYESP_LOBYTE(HAYESP_RXHIWMARK)); 587 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 588 HAYESP_HIBYTE(HAYESP_RXLOWMARK)); 589 bus_space_write_1(iot, sc->sc_hayespioh, HAYESP_CMD2, 590 HAYESP_LOBYTE(HAYESP_RXLOWMARK)); 591 } 592 #endif 593 594 #ifdef DDB 595 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 596 com_enable_debugport(sc); 597 #endif 598 599 #ifdef KGDB 600 /* 601 * Allow kgdb to "take over" this port. If this is 602 * the kgdb device, it has exclusive use. 603 */ 604 if (ISSET(sc->sc_hwflags, COM_HW_KGDB)) 605 com_enable_debugport(sc); 606 #endif 607 } 608 609 int 610 com_detach(self, flags) 611 struct device *self; 612 int flags; 613 { 614 struct com_softc *sc = (struct com_softc *)self; 615 int maj, mn; 616 617 /* locate the major number */ 618 for (maj = 0; maj < nchrdev; maj++) 619 if (cdevsw[maj].d_open == comopen) 620 break; 621 622 /* Nuke the vnodes for any open instances. */ 623 mn = self->dv_unit; 624 vdevgone(maj, mn, mn, VCHR); 625 626 mn |= COMDIALOUT_MASK; 627 vdevgone(maj, mn, mn, VCHR); 628 629 /* Free the receive buffer. */ 630 free(sc->sc_rbuf, M_DEVBUF); 631 632 /* Detach and free the tty. */ 633 tty_detach(sc->sc_tty); 634 ttyfree(sc->sc_tty); 635 636 #ifdef __GENERIC_SOFT_INTERRUPTS 637 /* Unhook the soft interrupt handler. */ 638 softintr_disestablish(sc->sc_si); 639 #endif 640 641 #if NRND > 0 && defined(RND_COM) 642 /* Unhook the entropy source. */ 643 rnd_detach_source(&sc->rnd_source); 644 #endif 645 646 return (0); 647 } 648 649 int 650 com_activate(self, act) 651 struct device *self; 652 enum devact act; 653 { 654 struct com_softc *sc = (struct com_softc *)self; 655 int s, rv = 0; 656 657 s = splserial(); 658 switch (act) { 659 case DVACT_ACTIVATE: 660 rv = EOPNOTSUPP; 661 break; 662 663 case DVACT_DEACTIVATE: 664 if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) { 665 rv = EBUSY; 666 break; 667 } 668 669 if (sc->disable != NULL && sc->enabled != 0) { 670 (*sc->disable)(sc); 671 sc->enabled = 0; 672 } 673 break; 674 } 675 splx(s); 676 return (rv); 677 } 678 679 void 680 com_shutdown(sc) 681 struct com_softc *sc; 682 { 683 struct tty *tp = sc->sc_tty; 684 int s; 685 686 s = splserial(); 687 688 /* If we were asserting flow control, then deassert it. */ 689 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 690 com_hwiflow(sc); 691 692 /* Clear any break condition set with TIOCSBRK. */ 693 com_break(sc, 0); 694 695 /* Turn off PPS capture on last close. */ 696 sc->sc_ppsclearmask = 0; 697 sc->sc_ppsassertmask = 0; 698 sc->sc_ppsassert = 1; 699 sc->sc_ppsclear = 1; 700 sc->ppsparam.mode = 0; 701 702 /* 703 * Hang up if necessary. Wait a bit, so the other side has time to 704 * notice even if we immediately open the port again. 705 */ 706 if (ISSET(tp->t_cflag, HUPCL)) { 707 com_modem(sc, 0); 708 (void) tsleep(sc, TTIPRI, ttclos, hz); 709 } 710 711 /* Turn off interrupts. */ 712 #ifdef DDB 713 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) 714 sc->sc_ier = IER_ERXRDY; /* interrupt on break */ 715 else 716 #endif 717 sc->sc_ier = 0; 718 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_ier, sc->sc_ier); 719 720 if (sc->disable) { 721 #ifdef DIAGNOSTIC 722 if (!sc->enabled) 723 panic("com_shutdown: not enabled?"); 724 #endif 725 (*sc->disable)(sc); 726 sc->enabled = 0; 727 } 728 729 splx(s); 730 } 731 732 int 733 comopen(dev, flag, mode, p) 734 dev_t dev; 735 int flag, mode; 736 struct proc *p; 737 { 738 int unit = COMUNIT(dev); 739 struct com_softc *sc; 740 struct tty *tp; 741 int s, s2; 742 int error; 743 744 if (unit >= com_cd.cd_ndevs) 745 return (ENXIO); 746 sc = com_cd.cd_devs[unit]; 747 if (sc == 0 || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) || 748 sc->sc_rbuf == NULL) 749 return (ENXIO); 750 751 if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) 752 return (ENXIO); 753 754 #ifdef KGDB 755 /* 756 * If this is the kgdb port, no other use is permitted. 757 */ 758 if (ISSET(sc->sc_hwflags, COM_HW_KGDB)) 759 return (EBUSY); 760 #endif 761 762 tp = sc->sc_tty; 763 764 if (ISSET(tp->t_state, TS_ISOPEN) && 765 ISSET(tp->t_state, TS_XCLUDE) && 766 p->p_ucred->cr_uid != 0) 767 return (EBUSY); 768 769 s = spltty(); 770 771 /* 772 * Do the following iff this is a first open. 773 */ 774 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 775 struct termios t; 776 777 tp->t_dev = dev; 778 779 s2 = splserial(); 780 781 if (sc->enable) { 782 if ((*sc->enable)(sc)) { 783 splx(s2); 784 splx(s); 785 printf("%s: device enable failed\n", 786 sc->sc_dev.dv_xname); 787 return (EIO); 788 } 789 sc->enabled = 1; 790 com_config(sc); 791 } 792 793 /* Turn on interrupts. */ 794 sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC; 795 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_ier, sc->sc_ier); 796 797 /* Fetch the current modem control status, needed later. */ 798 sc->sc_msr = bus_space_read_1(sc->sc_iot, sc->sc_ioh, com_msr); 799 800 /* Clear PPS capture state on first open. */ 801 sc->sc_ppsclearmask = 0; 802 sc->sc_ppsassertmask = 0; 803 sc->sc_ppsassert = 1; 804 sc->sc_ppsclear = 1; 805 806 splx(s2); 807 808 /* 809 * Initialize the termios status to the defaults. Add in the 810 * sticky bits from TIOCSFLAGS. 811 */ 812 t.c_ispeed = 0; 813 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 814 t.c_ospeed = comconsrate; 815 t.c_cflag = comconscflag; 816 } else { 817 t.c_ospeed = TTYDEF_SPEED; 818 t.c_cflag = TTYDEF_CFLAG; 819 } 820 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 821 SET(t.c_cflag, CLOCAL); 822 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 823 SET(t.c_cflag, CRTSCTS); 824 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 825 SET(t.c_cflag, MDMBUF); 826 /* Make sure comparam() will do something. */ 827 tp->t_ospeed = 0; 828 (void) comparam(tp, &t); 829 tp->t_iflag = TTYDEF_IFLAG; 830 tp->t_oflag = TTYDEF_OFLAG; 831 tp->t_lflag = TTYDEF_LFLAG; 832 ttychars(tp); 833 ttsetwater(tp); 834 835 s2 = splserial(); 836 837 /* 838 * Turn on DTR. We must always do this, even if carrier is not 839 * present, because otherwise we'd have to use TIOCSDTR 840 * immediately after setting CLOCAL, which applications do not 841 * expect. We always assert DTR while the device is open 842 * unless explicitly requested to deassert it. 843 */ 844 com_modem(sc, 1); 845 846 /* Clear the input ring, and unblock. */ 847 sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf; 848 sc->sc_rbavail = com_rbuf_size; 849 com_iflush(sc); 850 CLR(sc->sc_rx_flags, RX_ANY_BLOCK); 851 com_hwiflow(sc); 852 853 #ifdef COM_DEBUG 854 if (com_debug) 855 comstatus(sc, "comopen "); 856 #endif 857 858 splx(s2); 859 } 860 861 splx(s); 862 863 error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 864 if (error) 865 goto bad; 866 867 error = (*linesw[tp->t_line].l_open)(dev, tp); 868 if (error) 869 goto bad; 870 871 return (0); 872 873 bad: 874 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 875 /* 876 * We failed to open the device, and nobody else had it opened. 877 * Clean up the state as appropriate. 878 */ 879 com_shutdown(sc); 880 } 881 882 return (error); 883 } 884 885 int 886 comclose(dev, flag, mode, p) 887 dev_t dev; 888 int flag, mode; 889 struct proc *p; 890 { 891 struct com_softc *sc = com_cd.cd_devs[COMUNIT(dev)]; 892 struct tty *tp = sc->sc_tty; 893 894 /* XXX This is for cons.c. */ 895 if (!ISSET(tp->t_state, TS_ISOPEN)) 896 return (0); 897 898 (*linesw[tp->t_line].l_close)(tp, flag); 899 ttyclose(tp); 900 901 if (COM_ISALIVE(sc) == 0) 902 return (0); 903 904 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 905 /* 906 * Although we got a last close, the device may still be in 907 * use; e.g. if this was the dialout node, and there are still 908 * processes waiting for carrier on the non-dialout node. 909 */ 910 com_shutdown(sc); 911 } 912 913 return (0); 914 } 915 916 int 917 comread(dev, uio, flag) 918 dev_t dev; 919 struct uio *uio; 920 int flag; 921 { 922 struct com_softc *sc = com_cd.cd_devs[COMUNIT(dev)]; 923 struct tty *tp = sc->sc_tty; 924 925 if (COM_ISALIVE(sc) == 0) 926 return (EIO); 927 928 return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); 929 } 930 931 int 932 comwrite(dev, uio, flag) 933 dev_t dev; 934 struct uio *uio; 935 int flag; 936 { 937 struct com_softc *sc = com_cd.cd_devs[COMUNIT(dev)]; 938 struct tty *tp = sc->sc_tty; 939 940 if (COM_ISALIVE(sc) == 0) 941 return (EIO); 942 943 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 944 } 945 946 struct tty * 947 comtty(dev) 948 dev_t dev; 949 { 950 struct com_softc *sc = com_cd.cd_devs[COMUNIT(dev)]; 951 struct tty *tp = sc->sc_tty; 952 953 return (tp); 954 } 955 956 static u_char 957 tiocm_xxx2mcr(data) 958 int data; 959 { 960 u_char m = 0; 961 962 if (ISSET(data, TIOCM_DTR)) 963 SET(m, MCR_DTR); 964 if (ISSET(data, TIOCM_RTS)) 965 SET(m, MCR_RTS); 966 return m; 967 } 968 969 int 970 comioctl(dev, cmd, data, flag, p) 971 dev_t dev; 972 u_long cmd; 973 caddr_t data; 974 int flag; 975 struct proc *p; 976 { 977 struct com_softc *sc = com_cd.cd_devs[COMUNIT(dev)]; 978 struct tty *tp = sc->sc_tty; 979 int error; 980 int s; 981 982 if (COM_ISALIVE(sc) == 0) 983 return (EIO); 984 985 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 986 if (error >= 0) 987 return (error); 988 989 error = ttioctl(tp, cmd, data, flag, p); 990 if (error >= 0) 991 return (error); 992 993 error = 0; 994 995 s = splserial(); 996 997 switch (cmd) { 998 case TIOCSBRK: 999 com_break(sc, 1); 1000 break; 1001 1002 case TIOCCBRK: 1003 com_break(sc, 0); 1004 break; 1005 1006 case TIOCSDTR: 1007 com_modem(sc, 1); 1008 break; 1009 1010 case TIOCCDTR: 1011 com_modem(sc, 0); 1012 break; 1013 1014 case TIOCGFLAGS: 1015 *(int *)data = sc->sc_swflags; 1016 break; 1017 1018 case TIOCSFLAGS: 1019 error = suser(p->p_ucred, &p->p_acflag); 1020 if (error) 1021 break; 1022 sc->sc_swflags = *(int *)data; 1023 break; 1024 1025 case TIOCMSET: 1026 CLR(sc->sc_mcr, MCR_DTR | MCR_RTS); 1027 /*FALLTHROUGH*/ 1028 1029 case TIOCMBIS: 1030 SET(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data)); 1031 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_mcr, sc->sc_mcr); 1032 break; 1033 1034 case TIOCMBIC: 1035 CLR(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data)); 1036 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_mcr, sc->sc_mcr); 1037 break; 1038 1039 case TIOCMGET: { 1040 u_char m; 1041 int bits = 0; 1042 1043 m = sc->sc_mcr; 1044 if (ISSET(m, MCR_DTR)) 1045 SET(bits, TIOCM_DTR); 1046 if (ISSET(m, MCR_RTS)) 1047 SET(bits, TIOCM_RTS); 1048 m = sc->sc_msr; 1049 if (ISSET(m, MSR_DCD)) 1050 SET(bits, TIOCM_CD); 1051 if (ISSET(m, MSR_CTS)) 1052 SET(bits, TIOCM_CTS); 1053 if (ISSET(m, MSR_DSR)) 1054 SET(bits, TIOCM_DSR); 1055 if (ISSET(m, MSR_RI | MSR_TERI)) 1056 SET(bits, TIOCM_RI); 1057 if (bus_space_read_1(sc->sc_iot, sc->sc_ioh, com_ier)) 1058 SET(bits, TIOCM_LE); 1059 *(int *)data = bits; 1060 break; 1061 } 1062 1063 case PPS_CREATE: 1064 break; 1065 1066 case PPS_DESTROY: 1067 break; 1068 1069 case PPS_GETPARAMS: { 1070 pps_params_t *pp; 1071 pp = (pps_params_t *)data; 1072 *pp = sc->ppsparam; 1073 break; 1074 } 1075 1076 case PPS_SETPARAMS: { 1077 pps_params_t *pp; 1078 int mode; 1079 pp = (pps_params_t *)data; 1080 if (pp->mode & ~ppscap) { 1081 error = EINVAL; 1082 break; 1083 } 1084 sc->ppsparam = *pp; 1085 /* 1086 * Compute msr masks from user-specified timestamp state. 1087 */ 1088 mode = sc->ppsparam.mode; 1089 if (mode & PPS_HARDPPSONASSERT) { 1090 mode |= PPS_CAPTUREASSERT; 1091 /* XXX revoke any previous HARDPPS source */ 1092 } 1093 if (mode & PPS_HARDPPSONCLEAR) { 1094 mode |= PPS_CAPTURECLEAR; 1095 /* XXX revoke any previous HARDPPS source */ 1096 } 1097 switch (mode & PPS_CAPTUREBOTH) { 1098 case 0: 1099 sc->sc_ppsassertmask = 0; 1100 sc->sc_ppsassert = 1; 1101 sc->sc_ppsclearmask = 0; 1102 sc->sc_ppsclear = 1; 1103 break; 1104 1105 case PPS_CAPTUREASSERT: 1106 sc->sc_ppsassertmask = MSR_DCD; 1107 sc->sc_ppsassert = MSR_DCD; 1108 sc->sc_ppsclearmask = 0; 1109 sc->sc_ppsclear = 1; 1110 break; 1111 1112 case PPS_CAPTURECLEAR: 1113 sc->sc_ppsassertmask = 0; 1114 sc->sc_ppsassert = 1; 1115 sc->sc_ppsclearmask = MSR_DCD; 1116 sc->sc_ppsclear = 0; 1117 break; 1118 1119 case PPS_CAPTUREBOTH: 1120 sc->sc_ppsassertmask = MSR_DCD; 1121 sc->sc_ppsclearmask = MSR_DCD; 1122 sc->sc_ppsassert = MSR_DCD; 1123 sc->sc_ppsclear = 0; 1124 break; 1125 1126 default: 1127 error = EINVAL; 1128 break; 1129 } 1130 break; 1131 } 1132 1133 case PPS_GETCAP: 1134 *(int*)data = ppscap; 1135 break; 1136 1137 case PPS_FETCH: { 1138 pps_info_t *pi; 1139 pi = (pps_info_t *)data; 1140 *pi = sc->ppsinfo; 1141 break; 1142 } 1143 1144 case PPS_WAIT: 1145 /* XXX */ 1146 error = EOPNOTSUPP; 1147 break; 1148 1149 case TIOCDCDTIMESTAMP: /* XXX old, overloaded API used by xntpd v3 */ 1150 /* 1151 * Some GPS clocks models use the falling rather than 1152 * rising edge as the on-the-second signal. 1153 * The old API has no way to specify PPS polarity. 1154 */ 1155 #ifndef PPS_TRAILING_EDGE 1156 sc->sc_ppsassertmask = MSR_DCD; 1157 sc->sc_ppsassert = MSR_DCD; 1158 sc->sc_ppsclearmask = 0; 1159 sc->sc_ppsclear = 1; 1160 TIMESPEC_TO_TIMEVAL((struct timeval*)data, 1161 &sc->ppsinfo.assert_timestamp); 1162 #else 1163 sc->sc_ppsassertmask = 0; 1164 sc->sc_ppsassert = 1 1165 sc->sc_ppsclearmask = MSR_DCD; 1166 sc->sc_ppsclear = 0; 1167 TIMESPEC_TO_TIMEVAL((struct timeval*)data, 1168 &sc->ppsinfo.clear_timestamp); 1169 #endif 1170 break; 1171 1172 default: 1173 error = ENOTTY; 1174 break; 1175 } 1176 1177 splx(s); 1178 1179 #ifdef COM_DEBUG 1180 if (com_debug) 1181 comstatus(sc, "comioctl "); 1182 #endif 1183 1184 return (error); 1185 } 1186 1187 integrate void 1188 com_schedrx(sc) 1189 struct com_softc *sc; 1190 { 1191 1192 sc->sc_rx_ready = 1; 1193 1194 /* Wake up the poller. */ 1195 #ifdef __GENERIC_SOFT_INTERRUPTS 1196 softintr_schedule(sc->sc_si); 1197 #else 1198 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1199 setsoftserial(); 1200 #else 1201 if (!com_softintr_scheduled) { 1202 com_softintr_scheduled = 1; 1203 timeout(comsoft, NULL, 1); 1204 } 1205 #endif 1206 #endif 1207 } 1208 1209 void 1210 com_break(sc, onoff) 1211 struct com_softc *sc; 1212 int onoff; 1213 { 1214 1215 if (onoff) 1216 SET(sc->sc_lcr, LCR_SBREAK); 1217 else 1218 CLR(sc->sc_lcr, LCR_SBREAK); 1219 1220 if (!sc->sc_heldchange) { 1221 if (sc->sc_tx_busy) { 1222 sc->sc_heldtbc = sc->sc_tbc; 1223 sc->sc_tbc = 0; 1224 sc->sc_heldchange = 1; 1225 } else 1226 com_loadchannelregs(sc); 1227 } 1228 } 1229 1230 void 1231 com_modem(sc, onoff) 1232 struct com_softc *sc; 1233 int onoff; 1234 { 1235 1236 if (onoff) 1237 SET(sc->sc_mcr, sc->sc_mcr_dtr); 1238 else 1239 CLR(sc->sc_mcr, sc->sc_mcr_dtr); 1240 1241 if (!sc->sc_heldchange) { 1242 if (sc->sc_tx_busy) { 1243 sc->sc_heldtbc = sc->sc_tbc; 1244 sc->sc_tbc = 0; 1245 sc->sc_heldchange = 1; 1246 } else 1247 com_loadchannelregs(sc); 1248 } 1249 } 1250 1251 static u_char 1252 cflag2lcr(cflag) 1253 tcflag_t cflag; 1254 { 1255 u_char lcr = 0; 1256 1257 switch (ISSET(cflag, CSIZE)) { 1258 case CS5: 1259 SET(lcr, LCR_5BITS); 1260 break; 1261 case CS6: 1262 SET(lcr, LCR_6BITS); 1263 break; 1264 case CS7: 1265 SET(lcr, LCR_7BITS); 1266 break; 1267 case CS8: 1268 SET(lcr, LCR_8BITS); 1269 break; 1270 } 1271 if (ISSET(cflag, PARENB)) { 1272 SET(lcr, LCR_PENAB); 1273 if (!ISSET(cflag, PARODD)) 1274 SET(lcr, LCR_PEVEN); 1275 } 1276 if (ISSET(cflag, CSTOPB)) 1277 SET(lcr, LCR_STOPB); 1278 1279 return (lcr); 1280 } 1281 1282 int 1283 comparam(tp, t) 1284 struct tty *tp; 1285 struct termios *t; 1286 { 1287 struct com_softc *sc = com_cd.cd_devs[COMUNIT(tp->t_dev)]; 1288 int ospeed = comspeed(t->c_ospeed, sc->sc_frequency); 1289 u_char lcr; 1290 int s; 1291 1292 if (COM_ISALIVE(sc) == 0) 1293 return (EIO); 1294 1295 /* Check requested parameters. */ 1296 if (ospeed < 0) 1297 return (EINVAL); 1298 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 1299 return (EINVAL); 1300 1301 /* 1302 * For the console, always force CLOCAL and !HUPCL, so that the port 1303 * is always active. 1304 */ 1305 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 1306 ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1307 SET(t->c_cflag, CLOCAL); 1308 CLR(t->c_cflag, HUPCL); 1309 } 1310 1311 /* 1312 * If there were no changes, don't do anything. This avoids dropping 1313 * input and improves performance when all we did was frob things like 1314 * VMIN and VTIME. 1315 */ 1316 if (tp->t_ospeed == t->c_ospeed && 1317 tp->t_cflag == t->c_cflag) 1318 return (0); 1319 1320 lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); 1321 1322 s = splserial(); 1323 1324 sc->sc_lcr = lcr; 1325 1326 /* 1327 * If we're not in a mode that assumes a connection is present, then 1328 * ignore carrier changes. 1329 */ 1330 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 1331 sc->sc_msr_dcd = 0; 1332 else 1333 sc->sc_msr_dcd = MSR_DCD; 1334 /* 1335 * Set the flow control pins depending on the current flow control 1336 * mode. 1337 */ 1338 if (ISSET(t->c_cflag, CRTSCTS)) { 1339 sc->sc_mcr_dtr = MCR_DTR; 1340 sc->sc_mcr_rts = MCR_RTS; 1341 sc->sc_msr_cts = MSR_CTS; 1342 sc->sc_efr = EFR_AUTORTS | EFR_AUTOCTS; 1343 } else if (ISSET(t->c_cflag, MDMBUF)) { 1344 /* 1345 * For DTR/DCD flow control, make sure we don't toggle DTR for 1346 * carrier detection. 1347 */ 1348 sc->sc_mcr_dtr = 0; 1349 sc->sc_mcr_rts = MCR_DTR; 1350 sc->sc_msr_cts = MSR_DCD; 1351 sc->sc_efr = 0; 1352 } else { 1353 /* 1354 * If no flow control, then always set RTS. This will make 1355 * the other side happy if it mistakenly thinks we're doing 1356 * RTS/CTS flow control. 1357 */ 1358 sc->sc_mcr_dtr = MCR_DTR | MCR_RTS; 1359 sc->sc_mcr_rts = 0; 1360 sc->sc_msr_cts = 0; 1361 sc->sc_efr = 0; 1362 if (ISSET(sc->sc_mcr, MCR_DTR)) 1363 SET(sc->sc_mcr, MCR_RTS); 1364 else 1365 CLR(sc->sc_mcr, MCR_RTS); 1366 } 1367 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 1368 1369 #if 0 1370 if (ospeed == 0) 1371 CLR(sc->sc_mcr, sc->sc_mcr_dtr); 1372 else 1373 SET(sc->sc_mcr, sc->sc_mcr_dtr); 1374 #endif 1375 1376 sc->sc_dlbl = ospeed; 1377 sc->sc_dlbh = ospeed >> 8; 1378 1379 /* 1380 * Set the FIFO threshold based on the receive speed. 1381 * 1382 * * If it's a low speed, it's probably a mouse or some other 1383 * interactive device, so set the threshold low. 1384 * * If it's a high speed, trim the trigger level down to prevent 1385 * overflows. 1386 * * Otherwise set it a bit higher. 1387 */ 1388 if (ISSET(sc->sc_hwflags, COM_HW_HAYESP)) 1389 sc->sc_fifo = FIFO_DMA_MODE | FIFO_ENABLE | FIFO_TRIGGER_8; 1390 else if (ISSET(sc->sc_hwflags, COM_HW_FIFO)) 1391 sc->sc_fifo = FIFO_ENABLE | 1392 (t->c_ospeed <= 1200 ? FIFO_TRIGGER_1 : 1393 t->c_ospeed <= 38400 ? FIFO_TRIGGER_8 : FIFO_TRIGGER_4); 1394 else 1395 sc->sc_fifo = 0; 1396 1397 /* And copy to tty. */ 1398 tp->t_ispeed = 0; 1399 tp->t_ospeed = t->c_ospeed; 1400 tp->t_cflag = t->c_cflag; 1401 1402 if (!sc->sc_heldchange) { 1403 if (sc->sc_tx_busy) { 1404 sc->sc_heldtbc = sc->sc_tbc; 1405 sc->sc_tbc = 0; 1406 sc->sc_heldchange = 1; 1407 } else 1408 com_loadchannelregs(sc); 1409 } 1410 1411 if (!ISSET(t->c_cflag, CHWFLOW)) { 1412 /* Disable the high water mark. */ 1413 sc->sc_r_hiwat = 0; 1414 sc->sc_r_lowat = 0; 1415 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1416 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1417 com_schedrx(sc); 1418 } 1419 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 1420 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 1421 com_hwiflow(sc); 1422 } 1423 } else { 1424 sc->sc_r_hiwat = com_rbuf_hiwat; 1425 sc->sc_r_lowat = com_rbuf_lowat; 1426 } 1427 1428 splx(s); 1429 1430 /* 1431 * Update the tty layer's idea of the carrier bit, in case we changed 1432 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 1433 * explicit request. 1434 */ 1435 (void) (*linesw[tp->t_line].l_modem)(tp, ISSET(sc->sc_msr, MSR_DCD)); 1436 1437 #ifdef COM_DEBUG 1438 if (com_debug) 1439 comstatus(sc, "comparam "); 1440 #endif 1441 1442 if (!ISSET(t->c_cflag, CHWFLOW)) { 1443 if (sc->sc_tx_stopped) { 1444 sc->sc_tx_stopped = 0; 1445 comstart(tp); 1446 } 1447 } 1448 1449 return (0); 1450 } 1451 1452 void 1453 com_iflush(sc) 1454 struct com_softc *sc; 1455 { 1456 bus_space_tag_t iot = sc->sc_iot; 1457 bus_space_handle_t ioh = sc->sc_ioh; 1458 #ifdef DIAGNOSTIC 1459 int reg; 1460 #endif 1461 int timo; 1462 1463 #ifdef DIAGNOSTIC 1464 reg = 0xffff; 1465 #endif 1466 timo = 50000; 1467 /* flush any pending I/O */ 1468 while (ISSET(bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY) 1469 && --timo) 1470 #ifdef DIAGNOSTIC 1471 reg = 1472 #else 1473 (void) 1474 #endif 1475 bus_space_read_1(iot, ioh, com_data); 1476 #ifdef DIAGNOSTIC 1477 if (!timo) 1478 printf("%s: com_iflush timeout %02x\n", sc->sc_dev.dv_xname, 1479 reg); 1480 #endif 1481 } 1482 1483 void 1484 com_loadchannelregs(sc) 1485 struct com_softc *sc; 1486 { 1487 bus_space_tag_t iot = sc->sc_iot; 1488 bus_space_handle_t ioh = sc->sc_ioh; 1489 1490 /* XXXXX necessary? */ 1491 com_iflush(sc); 1492 1493 bus_space_write_1(iot, ioh, com_ier, 0); 1494 1495 if (ISSET(sc->sc_hwflags, COM_HW_FLOW)) { 1496 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 1497 bus_space_write_1(iot, ioh, com_efr, sc->sc_efr); 1498 } 1499 bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr | LCR_DLAB); 1500 bus_space_write_1(iot, ioh, com_dlbl, sc->sc_dlbl); 1501 bus_space_write_1(iot, ioh, com_dlbh, sc->sc_dlbh); 1502 bus_space_write_1(iot, ioh, com_lcr, sc->sc_lcr); 1503 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active = sc->sc_mcr); 1504 bus_space_write_1(iot, ioh, com_fifo, sc->sc_fifo); 1505 1506 bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); 1507 } 1508 1509 int 1510 comhwiflow(tp, block) 1511 struct tty *tp; 1512 int block; 1513 { 1514 struct com_softc *sc = com_cd.cd_devs[COMUNIT(tp->t_dev)]; 1515 int s; 1516 1517 if (COM_ISALIVE(sc) == 0) 1518 return (0); 1519 1520 if (sc->sc_mcr_rts == 0) 1521 return (0); 1522 1523 s = splserial(); 1524 if (block) { 1525 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1526 SET(sc->sc_rx_flags, RX_TTY_BLOCKED); 1527 com_hwiflow(sc); 1528 } 1529 } else { 1530 if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) { 1531 CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1532 com_schedrx(sc); 1533 } 1534 if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1535 CLR(sc->sc_rx_flags, RX_TTY_BLOCKED); 1536 com_hwiflow(sc); 1537 } 1538 } 1539 splx(s); 1540 return (1); 1541 } 1542 1543 /* 1544 * (un)block input via hw flowcontrol 1545 */ 1546 void 1547 com_hwiflow(sc) 1548 struct com_softc *sc; 1549 { 1550 bus_space_tag_t iot = sc->sc_iot; 1551 bus_space_handle_t ioh = sc->sc_ioh; 1552 1553 if (sc->sc_mcr_rts == 0) 1554 return; 1555 1556 if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) { 1557 CLR(sc->sc_mcr, sc->sc_mcr_rts); 1558 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 1559 } else { 1560 SET(sc->sc_mcr, sc->sc_mcr_rts); 1561 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 1562 } 1563 bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); 1564 } 1565 1566 1567 void 1568 comstart(tp) 1569 struct tty *tp; 1570 { 1571 struct com_softc *sc = com_cd.cd_devs[COMUNIT(tp->t_dev)]; 1572 bus_space_tag_t iot = sc->sc_iot; 1573 bus_space_handle_t ioh = sc->sc_ioh; 1574 int s; 1575 1576 if (COM_ISALIVE(sc) == 0) 1577 return; 1578 1579 s = spltty(); 1580 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 1581 goto out; 1582 if (sc->sc_tx_stopped) 1583 goto out; 1584 1585 if (tp->t_outq.c_cc <= tp->t_lowat) { 1586 if (ISSET(tp->t_state, TS_ASLEEP)) { 1587 CLR(tp->t_state, TS_ASLEEP); 1588 wakeup(&tp->t_outq); 1589 } 1590 selwakeup(&tp->t_wsel); 1591 if (tp->t_outq.c_cc == 0) 1592 goto out; 1593 } 1594 1595 /* Grab the first contiguous region of buffer space. */ 1596 { 1597 u_char *tba; 1598 int tbc; 1599 1600 tba = tp->t_outq.c_cf; 1601 tbc = ndqb(&tp->t_outq, 0); 1602 1603 (void)splserial(); 1604 1605 sc->sc_tba = tba; 1606 sc->sc_tbc = tbc; 1607 } 1608 1609 SET(tp->t_state, TS_BUSY); 1610 sc->sc_tx_busy = 1; 1611 1612 /* Enable transmit completion interrupts if necessary. */ 1613 if (!ISSET(sc->sc_ier, IER_ETXRDY)) { 1614 SET(sc->sc_ier, IER_ETXRDY); 1615 bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); 1616 } 1617 1618 /* Output the first chunk of the contiguous buffer. */ 1619 { 1620 int n; 1621 1622 n = sc->sc_tbc; 1623 if (n > sc->sc_fifolen) 1624 n = sc->sc_fifolen; 1625 bus_space_write_multi_1(iot, ioh, com_data, sc->sc_tba, n); 1626 sc->sc_tbc -= n; 1627 sc->sc_tba += n; 1628 } 1629 out: 1630 splx(s); 1631 return; 1632 } 1633 1634 /* 1635 * Stop output on a line. 1636 */ 1637 void 1638 comstop(tp, flag) 1639 struct tty *tp; 1640 int flag; 1641 { 1642 struct com_softc *sc = com_cd.cd_devs[COMUNIT(tp->t_dev)]; 1643 int s; 1644 1645 s = splserial(); 1646 if (ISSET(tp->t_state, TS_BUSY)) { 1647 /* Stop transmitting at the next chunk. */ 1648 sc->sc_tbc = 0; 1649 sc->sc_heldtbc = 0; 1650 if (!ISSET(tp->t_state, TS_TTSTOP)) 1651 SET(tp->t_state, TS_FLUSH); 1652 } 1653 splx(s); 1654 } 1655 1656 void 1657 comdiag(arg) 1658 void *arg; 1659 { 1660 struct com_softc *sc = arg; 1661 int overflows, floods; 1662 int s; 1663 1664 s = splserial(); 1665 overflows = sc->sc_overflows; 1666 sc->sc_overflows = 0; 1667 floods = sc->sc_floods; 1668 sc->sc_floods = 0; 1669 sc->sc_errors = 0; 1670 splx(s); 1671 1672 log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf flood%s\n", 1673 sc->sc_dev.dv_xname, 1674 overflows, overflows == 1 ? "" : "s", 1675 floods, floods == 1 ? "" : "s"); 1676 } 1677 1678 integrate void 1679 com_rxsoft(sc, tp) 1680 struct com_softc *sc; 1681 struct tty *tp; 1682 { 1683 int (*rint) __P((int c, struct tty *tp)) = linesw[tp->t_line].l_rint; 1684 u_char *get, *end; 1685 u_int cc, scc; 1686 u_char lsr; 1687 int code; 1688 int s; 1689 1690 end = sc->sc_ebuf; 1691 get = sc->sc_rbget; 1692 scc = cc = com_rbuf_size - sc->sc_rbavail; 1693 1694 if (cc == com_rbuf_size) { 1695 sc->sc_floods++; 1696 if (sc->sc_errors++ == 0) 1697 timeout(comdiag, sc, 60 * hz); 1698 } 1699 1700 while (cc) { 1701 code = get[0]; 1702 lsr = get[1]; 1703 if (ISSET(lsr, LSR_OE | LSR_BI | LSR_FE | LSR_PE)) { 1704 if (ISSET(lsr, LSR_OE)) { 1705 sc->sc_overflows++; 1706 if (sc->sc_errors++ == 0) 1707 timeout(comdiag, sc, 60 * hz); 1708 } 1709 if (ISSET(lsr, LSR_BI | LSR_FE)) 1710 SET(code, TTY_FE); 1711 if (ISSET(lsr, LSR_PE)) 1712 SET(code, TTY_PE); 1713 } 1714 if ((*rint)(code, tp) == -1) { 1715 /* 1716 * The line discipline's buffer is out of space. 1717 */ 1718 if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) { 1719 /* 1720 * We're either not using flow control, or the 1721 * line discipline didn't tell us to block for 1722 * some reason. Either way, we have no way to 1723 * know when there's more space available, so 1724 * just drop the rest of the data. 1725 */ 1726 get += cc << 1; 1727 if (get >= end) 1728 get -= com_rbuf_size << 1; 1729 cc = 0; 1730 } else { 1731 /* 1732 * Don't schedule any more receive processing 1733 * until the line discipline tells us there's 1734 * space available (through comhwiflow()). 1735 * Leave the rest of the data in the input 1736 * buffer. 1737 */ 1738 SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED); 1739 } 1740 break; 1741 } 1742 get += 2; 1743 if (get >= end) 1744 get = sc->sc_rbuf; 1745 cc--; 1746 } 1747 1748 if (cc != scc) { 1749 sc->sc_rbget = get; 1750 s = splserial(); 1751 cc = sc->sc_rbavail += scc - cc; 1752 /* Buffers should be ok again, release possible block. */ 1753 if (cc >= sc->sc_r_lowat) { 1754 if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1755 CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1756 SET(sc->sc_ier, IER_ERXRDY); 1757 bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_ier, sc->sc_ier); 1758 } 1759 if (ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED)) { 1760 CLR(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1761 com_hwiflow(sc); 1762 } 1763 } 1764 splx(s); 1765 } 1766 } 1767 1768 integrate void 1769 com_txsoft(sc, tp) 1770 struct com_softc *sc; 1771 struct tty *tp; 1772 { 1773 1774 CLR(tp->t_state, TS_BUSY); 1775 if (ISSET(tp->t_state, TS_FLUSH)) 1776 CLR(tp->t_state, TS_FLUSH); 1777 else 1778 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1779 (*linesw[tp->t_line].l_start)(tp); 1780 } 1781 1782 integrate void 1783 com_stsoft(sc, tp) 1784 struct com_softc *sc; 1785 struct tty *tp; 1786 { 1787 u_char msr, delta; 1788 int s; 1789 1790 s = splserial(); 1791 msr = sc->sc_msr; 1792 delta = sc->sc_msr_delta; 1793 sc->sc_msr_delta = 0; 1794 splx(s); 1795 1796 if (ISSET(delta, sc->sc_msr_dcd)) { 1797 /* 1798 * Inform the tty layer that carrier detect changed. 1799 */ 1800 (void) (*linesw[tp->t_line].l_modem)(tp, ISSET(msr, MSR_DCD)); 1801 } 1802 1803 if (ISSET(delta, sc->sc_msr_cts)) { 1804 /* Block or unblock output according to flow control. */ 1805 if (ISSET(msr, sc->sc_msr_cts)) { 1806 sc->sc_tx_stopped = 0; 1807 (*linesw[tp->t_line].l_start)(tp); 1808 } else { 1809 sc->sc_tx_stopped = 1; 1810 } 1811 } 1812 1813 #ifdef COM_DEBUG 1814 if (com_debug) 1815 comstatus(sc, "com_stsoft"); 1816 #endif 1817 } 1818 1819 #ifdef __GENERIC_SOFT_INTERRUPTS 1820 void 1821 comsoft(arg) 1822 void *arg; 1823 { 1824 struct com_softc *sc = arg; 1825 struct tty *tp; 1826 1827 if (COM_ISALIVE(sc) == 0) 1828 return; 1829 1830 { 1831 #else 1832 void 1833 #ifndef __NO_SOFT_SERIAL_INTERRUPT 1834 comsoft() 1835 #else 1836 comsoft(arg) 1837 void *arg; 1838 #endif 1839 { 1840 struct com_softc *sc; 1841 struct tty *tp; 1842 int unit; 1843 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1844 int s; 1845 1846 s = splsoftserial(); 1847 com_softintr_scheduled = 0; 1848 #endif 1849 1850 for (unit = 0; unit < com_cd.cd_ndevs; unit++) { 1851 sc = com_cd.cd_devs[unit]; 1852 if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK)) 1853 continue; 1854 1855 if (COM_ISALIVE(sc) == 0) 1856 continue; 1857 1858 tp = sc->sc_tty; 1859 if (tp == NULL) 1860 continue; 1861 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1862 continue; 1863 #endif 1864 tp = sc->sc_tty; 1865 1866 if (sc->sc_rx_ready) { 1867 sc->sc_rx_ready = 0; 1868 com_rxsoft(sc, tp); 1869 } 1870 1871 if (sc->sc_st_check) { 1872 sc->sc_st_check = 0; 1873 com_stsoft(sc, tp); 1874 } 1875 1876 if (sc->sc_tx_done) { 1877 sc->sc_tx_done = 0; 1878 com_txsoft(sc, tp); 1879 } 1880 } 1881 1882 #ifndef __GENERIC_SOFT_INTERRUPTS 1883 #ifdef __NO_SOFT_SERIAL_INTERRUPT 1884 splx(s); 1885 #endif 1886 #endif 1887 } 1888 1889 #ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS 1890 /* there has got to be a better way to do comsoft() */ 1891 }} 1892 #endif 1893 1894 int 1895 comintr(arg) 1896 void *arg; 1897 { 1898 struct com_softc *sc = arg; 1899 bus_space_tag_t iot = sc->sc_iot; 1900 bus_space_handle_t ioh = sc->sc_ioh; 1901 u_char *put, *end; 1902 u_int cc; 1903 u_char lsr, iir; 1904 1905 if (COM_ISALIVE(sc) == 0) 1906 return (0); 1907 1908 iir = bus_space_read_1(iot, ioh, com_iir); 1909 if (ISSET(iir, IIR_NOPEND)) 1910 return (0); 1911 1912 end = sc->sc_ebuf; 1913 put = sc->sc_rbput; 1914 cc = sc->sc_rbavail; 1915 1916 do { 1917 u_char msr, delta; 1918 1919 lsr = bus_space_read_1(iot, ioh, com_lsr); 1920 #if defined(DDB) || defined(KGDB) 1921 if (ISSET(lsr, LSR_BI)) { 1922 #ifdef DDB 1923 if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) { 1924 Debugger(); 1925 continue; 1926 } 1927 #endif 1928 #ifdef KGDB 1929 if (ISSET(sc->sc_hwflags, COM_HW_KGDB)) { 1930 kgdb_connect(1); 1931 continue; 1932 } 1933 #endif 1934 } 1935 #endif /* DDB || KGDB */ 1936 1937 if (ISSET(lsr, LSR_RCV_MASK) && 1938 !ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) { 1939 while (cc > 0) { 1940 put[0] = bus_space_read_1(iot, ioh, com_data); 1941 put[1] = lsr; 1942 put += 2; 1943 if (put >= end) 1944 put = sc->sc_rbuf; 1945 cc--; 1946 1947 lsr = bus_space_read_1(iot, ioh, com_lsr); 1948 if (!ISSET(lsr, LSR_RCV_MASK)) 1949 break; 1950 } 1951 1952 /* 1953 * Current string of incoming characters ended because 1954 * no more data was available or we ran out of space. 1955 * Schedule a receive event if any data was received. 1956 * If we're out of space, turn off receive interrupts. 1957 */ 1958 sc->sc_rbput = put; 1959 sc->sc_rbavail = cc; 1960 if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) 1961 sc->sc_rx_ready = 1; 1962 1963 /* 1964 * See if we are in danger of overflowing a buffer. If 1965 * so, use hardware flow control to ease the pressure. 1966 */ 1967 if (!ISSET(sc->sc_rx_flags, RX_IBUF_BLOCKED) && 1968 cc < sc->sc_r_hiwat) { 1969 SET(sc->sc_rx_flags, RX_IBUF_BLOCKED); 1970 com_hwiflow(sc); 1971 } 1972 1973 /* 1974 * If we're out of space, disable receive interrupts 1975 * until the queue has drained a bit. 1976 */ 1977 if (!cc) { 1978 SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED); 1979 CLR(sc->sc_ier, IER_ERXRDY); 1980 bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); 1981 } 1982 } else { 1983 if ((iir & IIR_IMASK) == IIR_RXRDY) { 1984 bus_space_write_1(iot, ioh, com_ier, 0); 1985 delay(10); 1986 bus_space_write_1(iot, ioh, com_ier,sc->sc_ier); 1987 iir = IIR_NOPEND; 1988 continue; 1989 } 1990 } 1991 1992 msr = bus_space_read_1(iot, ioh, com_msr); 1993 delta = msr ^ sc->sc_msr; 1994 sc->sc_msr = msr; 1995 if (ISSET(delta, sc->sc_msr_mask)) { 1996 SET(sc->sc_msr_delta, delta); 1997 1998 /* 1999 * Pulse-per-second clock signal on edge of DCD? 2000 */ 2001 if (ISSET(delta, (sc->sc_ppsassertmask | 2002 sc->sc_ppsclearmask))) { 2003 struct timeval tv; 2004 if ((msr & sc->sc_ppsassertmask) == 2005 sc->sc_ppsassert) { 2006 2007 /* XXX nanotime() */ 2008 microtime(&tv); 2009 TIMEVAL_TO_TIMESPEC(&tv, 2010 &sc->ppsinfo.assert_timestamp); 2011 if (sc->ppsparam.mode & PPS_OFFSETASSERT) { 2012 timespecadd(&sc->ppsinfo.assert_timestamp, 2013 &sc->ppsparam.assert_offset, 2014 &sc->ppsinfo.assert_timestamp); 2015 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.assert_timestamp); 2016 } 2017 2018 #ifdef PPS_SYNC 2019 if (sc->ppsparam.mode & PPS_HARDPPSONASSERT) 2020 hardpps(&tv, tv.tv_usec); 2021 #endif 2022 sc->ppsinfo.assert_sequence++; 2023 sc->ppsinfo.current_mode = 2024 sc->ppsparam.mode; 2025 2026 } else if ((msr & sc->sc_ppsclearmask) == 2027 sc->sc_ppsclear) { 2028 /* XXX nanotime() */ 2029 2030 microtime(&tv); 2031 TIMEVAL_TO_TIMESPEC(&tv, 2032 &sc->ppsinfo.clear_timestamp); 2033 if (sc->ppsparam.mode & PPS_OFFSETCLEAR) { 2034 timespecadd(&sc->ppsinfo.clear_timestamp, 2035 &sc->ppsparam.clear_offset, 2036 &sc->ppsinfo.clear_timestamp); 2037 TIMESPEC_TO_TIMEVAL(&tv, &sc->ppsinfo.clear_timestamp); 2038 } 2039 2040 #ifdef PPS_SYNC 2041 if (sc->ppsparam.mode & PPS_HARDPPSONCLEAR) 2042 hardpps(&tv, tv.tv_usec); 2043 #endif 2044 sc->ppsinfo.clear_sequence++; 2045 sc->ppsinfo.current_mode = 2046 sc->ppsparam.mode; 2047 } 2048 } 2049 2050 /* 2051 * Stop output immediately if we lose the output 2052 * flow control signal or carrier detect. 2053 */ 2054 if (ISSET(~msr, sc->sc_msr_mask)) { 2055 sc->sc_tbc = 0; 2056 sc->sc_heldtbc = 0; 2057 #ifdef COM_DEBUG 2058 if (com_debug) 2059 comstatus(sc, "comintr "); 2060 #endif 2061 } 2062 2063 sc->sc_st_check = 1; 2064 } 2065 } while (!ISSET((iir = bus_space_read_1(iot, ioh, com_iir)), IIR_NOPEND)); 2066 2067 /* 2068 * Done handling any receive interrupts. See if data can be 2069 * transmitted as well. Schedule tx done event if no data left 2070 * and tty was marked busy. 2071 */ 2072 if (ISSET(lsr, LSR_TXRDY)) { 2073 /* 2074 * If we've delayed a parameter change, do it now, and restart 2075 * output. 2076 */ 2077 if (sc->sc_heldchange) { 2078 com_loadchannelregs(sc); 2079 sc->sc_heldchange = 0; 2080 sc->sc_tbc = sc->sc_heldtbc; 2081 sc->sc_heldtbc = 0; 2082 } 2083 2084 /* Output the next chunk of the contiguous buffer, if any. */ 2085 if (sc->sc_tbc > 0) { 2086 int n; 2087 2088 n = sc->sc_tbc; 2089 if (n > sc->sc_fifolen) 2090 n = sc->sc_fifolen; 2091 bus_space_write_multi_1(iot, ioh, com_data, sc->sc_tba, n); 2092 sc->sc_tbc -= n; 2093 sc->sc_tba += n; 2094 } else { 2095 /* Disable transmit completion interrupts if necessary. */ 2096 if (ISSET(sc->sc_ier, IER_ETXRDY)) { 2097 CLR(sc->sc_ier, IER_ETXRDY); 2098 bus_space_write_1(iot, ioh, com_ier, sc->sc_ier); 2099 } 2100 if (sc->sc_tx_busy) { 2101 sc->sc_tx_busy = 0; 2102 sc->sc_tx_done = 1; 2103 } 2104 } 2105 } 2106 2107 /* Wake up the poller. */ 2108 #ifdef __GENERIC_SOFT_INTERRUPTS 2109 softintr_schedule(sc->sc_si); 2110 #else 2111 #ifndef __NO_SOFT_SERIAL_INTERRUPT 2112 setsoftserial(); 2113 #else 2114 if (!com_softintr_scheduled) { 2115 com_softintr_scheduled = 1; 2116 timeout(comsoft, NULL, 1); 2117 } 2118 #endif 2119 #endif 2120 2121 #if NRND > 0 && defined(RND_COM) 2122 rnd_add_uint32(&sc->rnd_source, iir | lsr); 2123 #endif 2124 2125 return (1); 2126 } 2127 2128 /* 2129 * The following functions are polled getc and putc routines, shared 2130 * by the console and kgdb glue. 2131 */ 2132 2133 int 2134 com_common_getc(iot, ioh) 2135 bus_space_tag_t iot; 2136 bus_space_handle_t ioh; 2137 { 2138 int s = splserial(); 2139 u_char stat, c; 2140 2141 /* block until a character becomes available */ 2142 while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_RXRDY)) 2143 ; 2144 2145 c = bus_space_read_1(iot, ioh, com_data); 2146 stat = bus_space_read_1(iot, ioh, com_iir); 2147 splx(s); 2148 return (c); 2149 } 2150 2151 void 2152 com_common_putc(iot, ioh, c) 2153 bus_space_tag_t iot; 2154 bus_space_handle_t ioh; 2155 int c; 2156 { 2157 int s = splserial(); 2158 u_char stat; 2159 int timo; 2160 2161 /* wait for any pending transmission to finish */ 2162 timo = 50000; 2163 while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) 2164 && --timo) 2165 ; 2166 2167 bus_space_write_1(iot, ioh, com_data, c); 2168 /* wait for this transmission to complete */ 2169 timo = 1500000; 2170 while (!ISSET(stat = bus_space_read_1(iot, ioh, com_lsr), LSR_TXRDY) 2171 && --timo) 2172 ; 2173 2174 /* clear any interrupts generated by this transmission */ 2175 stat = bus_space_read_1(iot, ioh, com_iir); 2176 splx(s); 2177 } 2178 2179 /* 2180 * Initialize UART to known state. 2181 */ 2182 int 2183 cominit(iot, iobase, rate, frequency, cflag, iohp) 2184 bus_space_tag_t iot; 2185 int iobase; 2186 int rate, frequency; 2187 tcflag_t cflag; 2188 bus_space_handle_t *iohp; 2189 { 2190 bus_space_handle_t ioh; 2191 2192 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) 2193 return (ENOMEM); /* ??? */ 2194 2195 bus_space_write_1(iot, ioh, com_lcr, LCR_EERS); 2196 bus_space_write_1(iot, ioh, com_efr, 0); 2197 bus_space_write_1(iot, ioh, com_lcr, LCR_DLAB); 2198 rate = comspeed(rate, frequency); 2199 bus_space_write_1(iot, ioh, com_dlbl, rate); 2200 bus_space_write_1(iot, ioh, com_dlbh, rate >> 8); 2201 bus_space_write_1(iot, ioh, com_lcr, cflag2lcr(cflag)); 2202 bus_space_write_1(iot, ioh, com_mcr, 0); 2203 bus_space_write_1(iot, ioh, com_fifo, 2204 FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1); 2205 bus_space_write_1(iot, ioh, com_ier, 0); 2206 2207 *iohp = ioh; 2208 return (0); 2209 } 2210 2211 /* 2212 * Following are all routines needed for COM to act as console 2213 */ 2214 2215 int 2216 comcnattach(iot, iobase, rate, frequency, cflag) 2217 bus_space_tag_t iot; 2218 int iobase; 2219 int rate, frequency; 2220 tcflag_t cflag; 2221 { 2222 int res; 2223 static struct consdev comcons = { 2224 NULL, NULL, comcngetc, comcnputc, comcnpollc, NODEV, CN_NORMAL 2225 }; 2226 2227 res = cominit(iot, iobase, rate, frequency, cflag, &comconsioh); 2228 if (res) 2229 return (res); 2230 2231 cn_tab = &comcons; 2232 2233 comconstag = iot; 2234 comconsaddr = iobase; 2235 comconsrate = rate; 2236 comconscflag = cflag; 2237 2238 return (0); 2239 } 2240 2241 int 2242 comcngetc(dev) 2243 dev_t dev; 2244 { 2245 2246 return (com_common_getc(comconstag, comconsioh)); 2247 } 2248 2249 /* 2250 * Console kernel output character routine. 2251 */ 2252 void 2253 comcnputc(dev, c) 2254 dev_t dev; 2255 int c; 2256 { 2257 2258 com_common_putc(comconstag, comconsioh, c); 2259 } 2260 2261 void 2262 comcnpollc(dev, on) 2263 dev_t dev; 2264 int on; 2265 { 2266 2267 } 2268 2269 #ifdef KGDB 2270 int 2271 com_kgdb_attach(iot, iobase, rate, frequency, cflag) 2272 bus_space_tag_t iot; 2273 int iobase; 2274 int rate, frequency; 2275 tcflag_t cflag; 2276 { 2277 int res; 2278 2279 if (iot == comconstag && iobase == comconsaddr) 2280 return (EBUSY); /* cannot share with console */ 2281 2282 res = cominit(iot, iobase, rate, frequency, cflag, &com_kgdb_ioh); 2283 if (res) 2284 return (res); 2285 2286 kgdb_attach(com_kgdb_getc, com_kgdb_putc, NULL); 2287 kgdb_dev = 123; /* unneeded, only to satisfy some tests */ 2288 2289 com_kgdb_iot = iot; 2290 com_kgdb_addr = iobase; 2291 2292 return (0); 2293 } 2294 2295 /* ARGSUSED */ 2296 int 2297 com_kgdb_getc(arg) 2298 void *arg; 2299 { 2300 2301 return (com_common_getc(com_kgdb_iot, com_kgdb_ioh)); 2302 } 2303 2304 /* ARGSUSED */ 2305 void 2306 com_kgdb_putc(arg, c) 2307 void *arg; 2308 int c; 2309 { 2310 2311 return (com_common_putc(com_kgdb_iot, com_kgdb_ioh, c)); 2312 } 2313 #endif /* KGDB */ 2314 2315 /* helper function to identify the com ports used by 2316 console or KGDB (and not yet autoconf attached) */ 2317 int 2318 com_is_console(iot, iobase, ioh) 2319 bus_space_tag_t iot; 2320 int iobase; 2321 bus_space_handle_t *ioh; 2322 { 2323 bus_space_handle_t help; 2324 2325 if (!comconsattached && 2326 iot == comconstag && iobase == comconsaddr) 2327 help = comconsioh; 2328 #ifdef KGDB 2329 else if (!com_kgdb_attached && 2330 iot == com_kgdb_iot && iobase == com_kgdb_addr) 2331 help = com_kgdb_ioh; 2332 #endif 2333 else 2334 return (0); 2335 2336 if (ioh) 2337 *ioh = help; 2338 return (1); 2339 } 2340
Indexes created Wed Sep 24 05:09:52 GMT 2025