ser.c revision 1.13
1 /* $NetBSD: ser.c,v 1.13 2001/04/11 14:45:07 leo Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Leo Weppelman. 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 * Copyright (c) 1993, 1994, 1995, 1996, 1997 40 * Charles M. Hannum. All rights reserved. 41 * 42 * Interrupt processing and hardware flow control partly based on code from 43 * Onno van der Linden and Gordon Ross. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by Charles M. Hannum. 56 * 4. The name of the author may not be used to endorse or promote products 57 * derived from this software without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 60 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 63 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 64 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 65 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 68 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 /* 72 * Copyright (c) 1991 The Regents of the University of California. 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by the University of 86 * California, Berkeley and its contributors. 87 * 4. Neither the name of the University nor the names of its contributors 88 * may be used to endorse or promote products derived from this software 89 * without specific prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * @(#)com.c 7.5 (Berkeley) 5/16/91 104 */ 105 106 #include "opt_ddb.h" 107 #include "opt_mbtype.h" 108 109 #include <sys/param.h> 110 #include <sys/systm.h> 111 #include <sys/ioctl.h> 112 #include <sys/select.h> 113 #include <sys/tty.h> 114 #include <sys/proc.h> 115 #include <sys/user.h> 116 #include <sys/conf.h> 117 #include <sys/file.h> 118 #include <sys/uio.h> 119 #include <sys/kernel.h> 120 #include <sys/syslog.h> 121 #include <sys/types.h> 122 #include <sys/device.h> 123 124 #include <m68k/asm_single.h> 125 126 #include <machine/iomap.h> 127 #include <machine/mfp.h> 128 #include <atari/atari/intr.h> 129 #include <atari/dev/serreg.h> 130 131 #if !defined(_MILANHW_) 132 #include <atari/dev/ym2149reg.h> 133 #else 134 /* MILAN has no ym2149 */ 135 #define ym2149_dtr(set) { \ 136 if (set) \ 137 single_inst_bset_b(MFP->mf_gpip, 0x08); \ 138 else single_inst_bclr_b(MFP->mf_gpip, 0x08); \ 139 } 140 141 #define ym2149_rts(set) { \ 142 if (set) \ 143 single_inst_bset_b(MFP->mf_gpip, 0x01); \ 144 else single_inst_bclr_b(MFP->mf_gpip, 0x01); \ 145 } 146 #endif /* _MILANHW_ */ 147 148 /* #define SER_DEBUG */ 149 150 #define SERUNIT(x) (minor(x) & 0x7ffff) 151 #define SERDIALOUT(x) (minor(x) & 0x80000) 152 153 /* XXX */ 154 #define CONSBAUD 9600 155 #define CONSCFLAG TTYDEF_CFLAG 156 /* end XXX */ 157 158 /* Macros to clear/set/test flags. */ 159 #define SET(t, f) (t) |= (f) 160 #define CLR(t, f) (t) &= ~(f) 161 #define ISSET(t, f) ((t) & (f)) 162 163 #define splserial() spl6() 164 165 /* Buffer size for character buffer */ 166 #define RXBUFSIZE 2048 /* More than enough.. */ 167 #define RXBUFMASK (RXBUFSIZE-1) /* Only iff previous is a power of 2 */ 168 #define RXHIWAT (RXBUFSIZE >> 2) 169 170 struct ser_softc { 171 struct device sc_dev; 172 struct tty *sc_tty; 173 174 struct callout sc_diag_ch; 175 176 int sc_overflows; 177 int sc_floods; 178 int sc_errors; 179 180 u_char sc_hwflags; 181 u_char sc_swflags; 182 183 int sc_ospeed; /* delay + timer-d data */ 184 u_char sc_imra; 185 u_char sc_imrb; 186 u_char sc_ucr; /* Uart control */ 187 u_char sc_msr; /* Modem status */ 188 u_char sc_tsr; /* Tranceiver status */ 189 u_char sc_rsr; /* Receiver status */ 190 u_char sc_mcr; /* (Pseudo) Modem ctrl. */ 191 192 u_char sc_msr_delta; 193 u_char sc_msr_mask; 194 u_char sc_mcr_active; 195 u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd; 196 197 int sc_r_hiwat; 198 volatile u_int sc_rbget; 199 volatile u_int sc_rbput; 200 volatile u_int sc_rbavail; 201 u_char sc_rbuf[RXBUFSIZE]; 202 u_char sc_lbuf[RXBUFSIZE]; 203 204 volatile u_char sc_rx_blocked; 205 volatile u_char sc_rx_ready; 206 volatile u_char sc_tx_busy; 207 volatile u_char sc_tx_done; 208 volatile u_char sc_tx_stopped; 209 volatile u_char sc_st_check; 210 211 u_char *sc_tba; 212 int sc_tbc; 213 int sc_heldtbc; 214 215 volatile u_char sc_heldchange; 216 }; 217 218 /* 219 * For sc_hwflags: 220 */ 221 #define SER_HW_CONSOLE 0x01 222 223 cdev_decl(ser); 224 225 void ser_break __P((struct ser_softc *, int)); 226 void ser_hwiflow __P((struct ser_softc *, int)); 227 void ser_iflush __P((struct ser_softc *)); 228 void ser_loadchannelregs __P((struct ser_softc *)); 229 void ser_modem __P((struct ser_softc *, int)); 230 void serdiag __P((void *)); 231 int serhwiflow __P((struct tty *, int)); 232 void serinit __P((int)); 233 void serinitcons __P((int)); 234 int baud; 235 int sermintr __P((void *)); 236 int sertrintr __P((void *)); 237 int serparam __P((struct tty *, struct termios *)); 238 void serstart __P((struct tty *)); 239 240 struct consdev; 241 void sercnprobe __P((struct consdev *)); 242 void sercninit __P((struct consdev *)); 243 int sercngetc __P((dev_t)); 244 void sercnputc __P((dev_t, int)); 245 void sercnpollc __P((dev_t, int)); 246 247 static void sermsrint __P((struct ser_softc *, struct tty*)); 248 static void serrxint __P((struct ser_softc *, struct tty*)); 249 static void ser_shutdown __P((struct ser_softc *)); 250 static int serspeed __P((long)); 251 static void sersoft __P((void *)); 252 static void sertxint __P((struct ser_softc *, struct tty*)); 253 254 static volatile int ser_softintr_scheduled = 0; 255 static int sermajor; 256 257 /* 258 * Autoconfig stuff 259 */ 260 static void serattach __P((struct device *, struct device *, void *)); 261 static int sermatch __P((struct device *, struct cfdata *, void *)); 262 263 struct cfattach ser_ca = { 264 sizeof(struct ser_softc), sermatch, serattach 265 }; 266 267 extern struct cfdriver ser_cd; 268 269 /*ARGSUSED*/ 270 static int 271 sermatch(pdp, cfp, auxp) 272 struct device *pdp; 273 struct cfdata *cfp; 274 void *auxp; 275 { 276 static int ser_matched = 0; 277 278 /* Match at most one ser unit */ 279 if (strcmp((char *)auxp, "ser") || ser_matched) 280 return 0; 281 282 ser_matched = 1; 283 return 1; 284 } 285 286 /*ARGSUSED*/ 287 static void 288 serattach(pdp, dp, auxp) 289 struct device *pdp, *dp; 290 void *auxp; 291 { 292 struct ser_softc *sc = (void *)dp; 293 294 if (intr_establish(1, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) 295 printf("serattach: Can't establish interrupt (1)\n"); 296 if (intr_establish(2, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) 297 printf("serattach: Can't establish interrupt (2)\n"); 298 if (intr_establish(14, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL) 299 printf("serattach: Can't establish interrupt (14)\n"); 300 if (intr_establish(9, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) 301 printf("serattach: Can't establish interrupt (9)\n"); 302 if (intr_establish(10, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) 303 printf("serattach: Can't establish interrupt (10)\n"); 304 if (intr_establish(11, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) 305 printf("serattach: Can't establish interrupt (11)\n"); 306 if (intr_establish(12, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL) 307 printf("serattach: Can't establish interrupt (12)\n"); 308 309 ym2149_rts(1); 310 ym2149_dtr(1); 311 312 /* 313 * Enable but mask interrupts... 314 * XXX: Look at edge-sensitivity for DCD/CTS interrupts. 315 */ 316 MFP->mf_ierb |= IB_SCTS|IB_SDCD; 317 MFP->mf_iera |= IA_RRDY|IA_RERR|IA_TRDY|IA_TERR; 318 MFP->mf_imrb &= ~(IB_SCTS|IB_SDCD); 319 MFP->mf_imra &= ~(IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); 320 321 callout_init(&sc->sc_diag_ch); 322 323 #ifdef SERCONSOLE 324 /* 325 * Activate serial console when DCD present... 326 */ 327 if (!(MFP->mf_gpip & MCR_DCD)) 328 SET(sc->sc_hwflags, SER_HW_CONSOLE); 329 #endif /* SERCONSOLE */ 330 331 printf("\n"); 332 if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { 333 serinit(CONSBAUD); 334 printf("%s: console\n", sc->sc_dev.dv_xname); 335 } 336 } 337 338 #ifdef SER_DEBUG 339 void serstatus __P((struct ser_softc *, char *)); 340 void 341 serstatus(sc, str) 342 struct ser_softc *sc; 343 char *str; 344 { 345 struct tty *tp = sc->sc_tty; 346 347 printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n", 348 sc->sc_dev.dv_xname, str, 349 ISSET(tp->t_cflag, CLOCAL) ? "+" : "-", 350 ISSET(sc->sc_msr, MCR_DCD) ? "+" : "-", 351 ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-", 352 ISSET(sc->sc_mcr, MCR_DTR) ? "+" : "-", 353 sc->sc_tx_stopped ? "+" : "-"); 354 355 printf("%s: %s %scrtscts %scts %sts_ttstop %srts %srx_blocked\n", 356 sc->sc_dev.dv_xname, str, 357 ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-", 358 ISSET(sc->sc_msr, MCR_CTS) ? "+" : "-", 359 ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-", 360 ISSET(sc->sc_mcr, MCR_RTS) ? "+" : "-", 361 sc->sc_rx_blocked ? "+" : "-"); 362 } 363 #endif /* SER_DEBUG */ 364 365 int 366 seropen(dev, flag, mode, p) 367 dev_t dev; 368 int flag, mode; 369 struct proc *p; 370 { 371 int unit = SERUNIT(dev); 372 struct ser_softc *sc; 373 struct tty *tp; 374 int s, s2; 375 int error = 0; 376 377 if (unit >= ser_cd.cd_ndevs) 378 return (ENXIO); 379 sc = ser_cd.cd_devs[unit]; 380 if (!sc) 381 return (ENXIO); 382 383 if (!sc->sc_tty) { 384 tp = sc->sc_tty = ttymalloc(); 385 tty_attach(tp); 386 } else 387 tp = sc->sc_tty; 388 389 if (ISSET(tp->t_state, TS_ISOPEN) && 390 ISSET(tp->t_state, TS_XCLUDE) && 391 p->p_ucred->cr_uid != 0) 392 return (EBUSY); 393 394 s = spltty(); 395 396 /* 397 * Do the following if this is a first open. 398 */ 399 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 400 struct termios t; 401 402 /* Turn on interrupts. */ 403 sc->sc_imra = IA_RRDY|IA_RERR|IA_TRDY|IA_TERR; 404 sc->sc_imrb = IB_SCTS|IB_SDCD; 405 single_inst_bset_b(MFP->mf_imra, sc->sc_imra); 406 single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb); 407 408 /* Fetch the current modem control status, needed later. */ 409 sc->sc_msr = ~MFP->mf_gpip & (IO_SDCD|IO_SCTS|IO_SRI); 410 411 /* Add some entry points needed by the tty layer. */ 412 tp->t_oproc = serstart; 413 tp->t_param = serparam; 414 tp->t_hwiflow = serhwiflow; 415 tp->t_dev = dev; 416 417 /* 418 * Initialize the termios status to the defaults. Add in the 419 * sticky bits from TIOCSFLAGS. 420 */ 421 t.c_ispeed = 0; 422 if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { 423 t.c_ospeed = CONSBAUD; 424 t.c_cflag = CONSCFLAG; 425 } 426 else { 427 t.c_ospeed = TTYDEF_SPEED; 428 t.c_cflag = TTYDEF_CFLAG; 429 } 430 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) 431 SET(t.c_cflag, CLOCAL); 432 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) 433 SET(t.c_cflag, CRTSCTS); 434 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) 435 SET(t.c_cflag, MDMBUF); 436 tp->t_iflag = TTYDEF_IFLAG; 437 tp->t_oflag = TTYDEF_OFLAG; 438 tp->t_lflag = TTYDEF_LFLAG; 439 ttychars(tp); 440 (void) serparam(tp, &t); 441 ttsetwater(tp); 442 443 s2 = splserial(); 444 445 /* 446 * Turn on DTR. We must always do this, even if carrier is not 447 * present, because otherwise we'd have to use TIOCSDTR 448 * immediately after setting CLOCAL. We will drop DTR only on 449 * the next high-low transition of DCD, or by explicit request. 450 */ 451 ser_modem(sc, 1); 452 453 /* Clear the input ring, and unblock. */ 454 sc->sc_rbput = sc->sc_rbget = 0; 455 sc->sc_rbavail = RXBUFSIZE; 456 ser_iflush(sc); 457 sc->sc_rx_blocked = 0; 458 ser_hwiflow(sc, 0); 459 460 #ifdef SER_DEBUG 461 serstatus(sc, "seropen "); 462 #endif 463 464 splx(s2); 465 } 466 467 splx(s); 468 469 error = ttyopen(tp, SERDIALOUT(dev), ISSET(flag, O_NONBLOCK)); 470 if (error) 471 goto bad; 472 473 error = (*tp->t_linesw->l_open)(dev, tp); 474 if (error) 475 goto bad; 476 477 return (0); 478 479 bad: 480 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 481 /* 482 * We failed to open the device, and nobody else had it opened. 483 * Clean up the state as appropriate. 484 */ 485 ser_shutdown(sc); 486 } 487 488 return (error); 489 } 490 491 int 492 serclose(dev, flag, mode, p) 493 dev_t dev; 494 int flag, mode; 495 struct proc *p; 496 { 497 int unit = SERUNIT(dev); 498 struct ser_softc *sc = ser_cd.cd_devs[unit]; 499 struct tty *tp = sc->sc_tty; 500 501 /* XXX This is for cons.c. */ 502 if (!ISSET(tp->t_state, TS_ISOPEN)) 503 return (0); 504 505 (*tp->t_linesw->l_close)(tp, flag); 506 ttyclose(tp); 507 508 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 509 /* 510 * Although we got a last close, the device may still be in 511 * use; e.g. if this was the dialout node, and there are still 512 * processes waiting for carrier on the non-dialout node. 513 */ 514 ser_shutdown(sc); 515 } 516 517 return (0); 518 } 519 520 int 521 serread(dev, uio, flag) 522 dev_t dev; 523 struct uio *uio; 524 int flag; 525 { 526 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)]; 527 struct tty *tp = sc->sc_tty; 528 529 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 530 } 531 532 int 533 serwrite(dev, uio, flag) 534 dev_t dev; 535 struct uio *uio; 536 int flag; 537 { 538 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)]; 539 struct tty *tp = sc->sc_tty; 540 541 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 542 } 543 544 struct tty * 545 sertty(dev) 546 dev_t dev; 547 { 548 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)]; 549 struct tty *tp = sc->sc_tty; 550 551 return (tp); 552 } 553 554 int 555 serioctl(dev, cmd, data, flag, p) 556 dev_t dev; 557 u_long cmd; 558 caddr_t data; 559 int flag; 560 struct proc *p; 561 { 562 int unit = SERUNIT(dev); 563 struct ser_softc *sc = ser_cd.cd_devs[unit]; 564 struct tty *tp = sc->sc_tty; 565 int error; 566 567 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 568 if (error >= 0) 569 return (error); 570 571 error = ttioctl(tp, cmd, data, flag, p); 572 if (error >= 0) 573 return (error); 574 575 switch (cmd) { 576 case TIOCSBRK: 577 ser_break(sc, 1); 578 break; 579 580 case TIOCCBRK: 581 ser_break(sc, 0); 582 break; 583 584 case TIOCSDTR: 585 ser_modem(sc, 1); 586 break; 587 588 case TIOCCDTR: 589 ser_modem(sc, 0); 590 break; 591 592 case TIOCGFLAGS: 593 *(int *)data = sc->sc_swflags; 594 break; 595 596 case TIOCSFLAGS: 597 error = suser(p->p_ucred, &p->p_acflag); 598 if (error) 599 return (error); 600 sc->sc_swflags = *(int *)data; 601 break; 602 603 case TIOCMSET: 604 case TIOCMBIS: 605 case TIOCMBIC: 606 case TIOCMGET: 607 default: 608 return (ENOTTY); 609 } 610 611 #ifdef SER_DEBUG 612 serstatus(sc, "serioctl "); 613 #endif 614 615 return (0); 616 } 617 618 void 619 ser_break(sc, onoff) 620 struct ser_softc *sc; 621 int onoff; 622 { 623 int s; 624 625 s = splserial(); 626 if (onoff) 627 SET(sc->sc_tsr, TSR_SBREAK); 628 else 629 CLR(sc->sc_tsr, TSR_SBREAK); 630 631 if (!sc->sc_heldchange) { 632 if (sc->sc_tx_busy) { 633 sc->sc_heldtbc = sc->sc_tbc; 634 sc->sc_tbc = 0; 635 sc->sc_heldchange = 1; 636 } else 637 ser_loadchannelregs(sc); 638 } 639 splx(s); 640 } 641 642 void 643 ser_modem(sc, onoff) 644 struct ser_softc *sc; 645 int onoff; 646 { 647 int s; 648 649 s = splserial(); 650 if (onoff) 651 SET(sc->sc_mcr, sc->sc_mcr_dtr); 652 else 653 CLR(sc->sc_mcr, sc->sc_mcr_dtr); 654 655 if (!sc->sc_heldchange) { 656 if (sc->sc_tx_busy) { 657 sc->sc_heldtbc = sc->sc_tbc; 658 sc->sc_tbc = 0; 659 sc->sc_heldchange = 1; 660 } else 661 ser_loadchannelregs(sc); 662 } 663 splx(s); 664 } 665 666 int 667 serparam(tp, t) 668 struct tty *tp; 669 struct termios *t; 670 { 671 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; 672 int ospeed = serspeed(t->c_ospeed); 673 u_char ucr; 674 int s; 675 676 /* check requested parameters */ 677 if (ospeed < 0) 678 return (EINVAL); 679 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 680 return (EINVAL); 681 682 sc->sc_rsr = RSR_ENAB; 683 sc->sc_tsr = TSR_ENAB; 684 685 ucr = UCR_CLKDIV; 686 687 switch (ISSET(t->c_cflag, CSIZE)) { 688 case CS5: 689 SET(ucr, UCR_5BITS); 690 break; 691 case CS6: 692 SET(ucr, UCR_6BITS); 693 break; 694 case CS7: 695 SET(ucr, UCR_7BITS); 696 break; 697 case CS8: 698 SET(ucr, UCR_8BITS); 699 break; 700 } 701 if (ISSET(t->c_cflag, PARENB)) { 702 SET(ucr, UCR_PENAB); 703 if (!ISSET(t->c_cflag, PARODD)) 704 SET(ucr, UCR_PEVEN); 705 } 706 if (ISSET(t->c_cflag, CSTOPB)) 707 SET(ucr, UCR_STOPB2); 708 else 709 SET(ucr, UCR_STOPB1); 710 711 s = splserial(); 712 713 sc->sc_ucr = ucr; 714 715 /* 716 * For the console, always force CLOCAL and !HUPCL, so that the port 717 * is always active. 718 */ 719 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || 720 ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) { 721 SET(t->c_cflag, CLOCAL); 722 CLR(t->c_cflag, HUPCL); 723 } 724 725 /* 726 * If we're not in a mode that assumes a connection is present, then 727 * ignore carrier changes. 728 */ 729 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 730 sc->sc_msr_dcd = 0; 731 else 732 sc->sc_msr_dcd = MCR_DCD; 733 /* 734 * Set the flow control pins depending on the current flow control 735 * mode. 736 */ 737 if (ISSET(t->c_cflag, CRTSCTS)) { 738 sc->sc_mcr_dtr = MCR_DTR; 739 sc->sc_mcr_rts = MCR_RTS; 740 sc->sc_msr_cts = MCR_CTS; 741 sc->sc_r_hiwat = RXHIWAT; 742 } else if (ISSET(t->c_cflag, MDMBUF)) { 743 /* 744 * For DTR/DCD flow control, make sure we don't toggle DTR for 745 * carrier detection. 746 */ 747 sc->sc_mcr_dtr = 0; 748 sc->sc_mcr_rts = MCR_DTR; 749 sc->sc_msr_cts = MCR_DCD; 750 sc->sc_r_hiwat = RXHIWAT; 751 } else { 752 /* 753 * If no flow control, then always set RTS. This will make 754 * the other side happy if it mistakenly thinks we're doing 755 * RTS/CTS flow control. 756 */ 757 sc->sc_mcr_dtr = MCR_DTR | MCR_RTS; 758 sc->sc_mcr_rts = 0; 759 sc->sc_msr_cts = 0; 760 sc->sc_r_hiwat = 0; 761 if (ISSET(sc->sc_mcr, MCR_DTR)) 762 SET(sc->sc_mcr, MCR_RTS); 763 else 764 CLR(sc->sc_mcr, MCR_RTS); 765 } 766 sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd; 767 768 #if 0 769 if (ospeed == 0) 770 CLR(sc->sc_mcr, sc->sc_mcr_dtr); 771 else 772 SET(sc->sc_mcr, sc->sc_mcr_dtr); 773 #endif 774 775 sc->sc_ospeed = ospeed; 776 777 /* and copy to tty */ 778 tp->t_ispeed = 0; 779 tp->t_ospeed = t->c_ospeed; 780 tp->t_cflag = t->c_cflag; 781 782 if (!sc->sc_heldchange) { 783 if (sc->sc_tx_busy) { 784 sc->sc_heldtbc = sc->sc_tbc; 785 sc->sc_tbc = 0; 786 sc->sc_heldchange = 1; 787 } else 788 ser_loadchannelregs(sc); 789 } 790 791 splx(s); 792 793 /* 794 * Update the tty layer's idea of the carrier bit, in case we changed 795 * CLOCAL or MDMBUF. We don't hang up here; we only do that if we 796 * lose carrier while carrier detection is on. 797 */ 798 (void) (*tp->t_linesw->l_modem)(tp, ISSET(sc->sc_msr, MCR_DCD)); 799 800 #ifdef SER_DEBUG 801 serstatus(sc, "serparam "); 802 #endif 803 804 /* XXXXX FIX ME */ 805 /* Block or unblock as needed. */ 806 if (!ISSET(t->c_cflag, CHWFLOW)) { 807 if (sc->sc_rx_blocked) { 808 sc->sc_rx_blocked = 0; 809 ser_hwiflow(sc, 0); 810 } 811 if (sc->sc_tx_stopped) { 812 sc->sc_tx_stopped = 0; 813 serstart(tp); 814 } 815 } else { 816 #if 0 817 sermsrint(sc, tp); 818 #endif 819 } 820 821 return (0); 822 } 823 824 void 825 ser_iflush(sc) 826 struct ser_softc *sc; 827 { 828 u_char tmp; 829 830 /* flush any pending I/O */ 831 while (ISSET(MFP->mf_rsr, RSR_CIP|RSR_BFULL)) 832 tmp = MFP->mf_udr; 833 } 834 835 void 836 ser_loadchannelregs(sc) 837 struct ser_softc *sc; 838 { 839 /* XXXXX necessary? */ 840 ser_iflush(sc); 841 842 /* 843 * No interrupts please... 844 */ 845 if((MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR)) != sc->sc_imra) { 846 printf("loadchannelregs: mf_imra: %x sc_imra: %x\n", (u_int)MFP->mf_imra, 847 (u_int)sc->sc_imra); 848 } 849 if((MFP->mf_imrb & (IB_SCTS|IB_SDCD)) != sc->sc_imrb) { 850 printf("loadchannelregs: mf_imrb: %x sc_imrb: %x\n", (u_int)MFP->mf_imrb, 851 (u_int)sc->sc_imrb); 852 } 853 single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); 854 single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD); 855 856 MFP->mf_ucr = sc->sc_ucr; 857 MFP->mf_rsr = sc->sc_rsr; 858 MFP->mf_tsr = sc->sc_tsr; 859 860 single_inst_bclr_b(MFP->mf_tcdcr, 0x07); 861 MFP->mf_tddr = sc->sc_ospeed; 862 single_inst_bset_b(MFP->mf_tcdcr, (sc->sc_ospeed >> 8) & 0x0f); 863 864 sc->sc_mcr_active = sc->sc_mcr; 865 866 if (machineid & ATARI_HADES) { 867 /* PCB fault, wires exchanged..... */ 868 ym2149_rts(!(sc->sc_mcr_active & MCR_DTR)); 869 ym2149_dtr(!(sc->sc_mcr_active & MCR_RTS)); 870 } 871 else { 872 ym2149_rts(!(sc->sc_mcr_active & MCR_RTS)); 873 ym2149_dtr(!(sc->sc_mcr_active & MCR_DTR)); 874 } 875 876 single_inst_bset_b(MFP->mf_imra, sc->sc_imra); 877 single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb); 878 } 879 880 int 881 serhwiflow(tp, block) 882 struct tty *tp; 883 int block; 884 { 885 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; 886 int s; 887 888 if (sc->sc_mcr_rts == 0) 889 return (0); 890 891 s = splserial(); 892 if (block) { 893 /* 894 * The tty layer is asking us to block input. 895 * If we already did it, just return TRUE. 896 */ 897 if (sc->sc_rx_blocked) 898 goto out; 899 sc->sc_rx_blocked = 1; 900 } else { 901 /* 902 * The tty layer is asking us to resume input. 903 * The input ring is always empty by now. 904 */ 905 sc->sc_rx_blocked = 0; 906 } 907 ser_hwiflow(sc, block); 908 out: 909 splx(s); 910 return (1); 911 } 912 913 /* 914 * (un)block input via hw flowcontrol 915 */ 916 void 917 ser_hwiflow(sc, block) 918 struct ser_softc *sc; 919 int block; 920 { 921 if (sc->sc_mcr_rts == 0) 922 return; 923 924 if (block) { 925 CLR(sc->sc_mcr, sc->sc_mcr_rts); 926 CLR(sc->sc_mcr_active, sc->sc_mcr_rts); 927 } else { 928 SET(sc->sc_mcr, sc->sc_mcr_rts); 929 SET(sc->sc_mcr_active, sc->sc_mcr_rts); 930 } 931 if (machineid & ATARI_HADES) { 932 /* PCB fault, wires exchanged..... */ 933 ym2149_dtr(sc->sc_mcr_active & MCR_RTS); 934 } 935 else { 936 ym2149_rts(sc->sc_mcr_active & MCR_RTS); 937 } 938 } 939 940 void 941 serstart(tp) 942 struct tty *tp; 943 { 944 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; 945 int s; 946 947 s = spltty(); 948 if (ISSET(tp->t_state, TS_BUSY)) 949 goto out; 950 if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP)) 951 goto stopped; 952 953 if (sc->sc_tx_stopped) 954 goto stopped; 955 956 if (tp->t_outq.c_cc <= tp->t_lowat) { 957 if (ISSET(tp->t_state, TS_ASLEEP)) { 958 CLR(tp->t_state, TS_ASLEEP); 959 wakeup(&tp->t_outq); 960 } 961 selwakeup(&tp->t_wsel); 962 if (tp->t_outq.c_cc == 0) 963 goto stopped; 964 } 965 966 /* Grab the first contiguous region of buffer space. */ 967 { 968 u_char *tba; 969 int tbc; 970 971 tba = tp->t_outq.c_cf; 972 tbc = ndqb(&tp->t_outq, 0); 973 974 (void)splserial(); 975 976 sc->sc_tba = tba; 977 sc->sc_tbc = tbc; 978 } 979 980 SET(tp->t_state, TS_BUSY); 981 sc->sc_tx_busy = 1; 982 983 /* Enable transmit completion interrupts if necessary. */ 984 if (!ISSET(sc->sc_imra, IA_TRDY)) { 985 SET(sc->sc_imra, IA_TRDY|IA_TERR); 986 single_inst_bset_b(MFP->mf_imra, IA_TRDY|IA_TERR); 987 } 988 989 /* Output the first char */ 990 MFP->mf_udr = *sc->sc_tba; 991 sc->sc_tbc --; 992 sc->sc_tba ++; 993 994 splx(s); 995 return; 996 997 stopped: 998 /* Disable transmit completion interrupts if necessary. */ 999 if (ISSET(sc->sc_imra, IA_TRDY)) { 1000 CLR(sc->sc_imra, IA_TRDY|IA_TERR); 1001 single_inst_bclr_b(MFP->mf_imra, IA_TRDY|IA_TERR); 1002 } 1003 out: 1004 splx(s); 1005 return; 1006 } 1007 1008 /* 1009 * Stop output on a line. 1010 */ 1011 void 1012 serstop(tp, flag) 1013 struct tty *tp; 1014 int flag; 1015 { 1016 struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)]; 1017 int s; 1018 1019 s = splserial(); 1020 if (ISSET(tp->t_state, TS_BUSY)) { 1021 /* Stop transmitting at the next chunk. */ 1022 sc->sc_tbc = 0; 1023 sc->sc_heldtbc = 0; 1024 if (!ISSET(tp->t_state, TS_TTSTOP)) 1025 SET(tp->t_state, TS_FLUSH); 1026 } 1027 splx(s); 1028 } 1029 1030 void 1031 serdiag(arg) 1032 void *arg; 1033 { 1034 struct ser_softc *sc = arg; 1035 int overflows, floods; 1036 int s; 1037 1038 s = splserial(); 1039 overflows = sc->sc_overflows; 1040 sc->sc_overflows = 0; 1041 floods = sc->sc_floods; 1042 sc->sc_floods = 0; 1043 sc->sc_errors = 0; 1044 splx(s); 1045 1046 log(LOG_WARNING, 1047 "%s: %d silo overflow%s, %d ibuf flood%s\n", 1048 sc->sc_dev.dv_xname, 1049 overflows, overflows == 1 ? "" : "s", 1050 floods, floods == 1 ? "" : "s"); 1051 } 1052 1053 static 1054 void ser_shutdown(sc) 1055 struct ser_softc *sc; 1056 { 1057 int s; 1058 struct tty *tp = sc->sc_tty; 1059 1060 1061 s = splserial(); 1062 1063 /* If we were asserting flow control, then deassert it. */ 1064 sc->sc_rx_blocked = 1; 1065 ser_hwiflow(sc, 1); 1066 1067 /* Clear any break condition set with TIOCSBRK. */ 1068 ser_break(sc, 0); 1069 1070 /* 1071 * Hang up if necessary. Wait a bit, so the other side has time to 1072 * notice even if we immediately open the port again. 1073 */ 1074 if (ISSET(tp->t_cflag, HUPCL)) { 1075 ser_modem(sc, 0); 1076 (void) tsleep(sc, TTIPRI, ttclos, hz); 1077 } 1078 1079 /* Turn off interrupts. */ 1080 CLR(sc->sc_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); 1081 CLR(sc->sc_imrb, IB_SCTS|IB_SDCD); 1082 single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD); 1083 single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); 1084 splx(s); 1085 } 1086 1087 static void 1088 serrxint(sc, tp) 1089 struct ser_softc *sc; 1090 struct tty *tp; 1091 { 1092 u_int get, cc, scc; 1093 int code; 1094 u_char rsr; 1095 int s; 1096 static int lsrmap[8] = { 1097 0, TTY_PE, 1098 TTY_FE, TTY_PE|TTY_FE, 1099 TTY_FE, TTY_PE|TTY_FE, 1100 TTY_FE, TTY_PE|TTY_FE 1101 }; 1102 1103 get = sc->sc_rbget; 1104 scc = cc = RXBUFSIZE - sc->sc_rbavail; 1105 1106 if (cc == RXBUFSIZE) { 1107 sc->sc_floods++; 1108 if (sc->sc_errors++ == 0) 1109 callout_reset(&sc->sc_diag_ch, 60 * hz, serdiag, sc); 1110 } 1111 1112 while (cc--) { 1113 rsr = sc->sc_lbuf[get]; 1114 if (ISSET(rsr, RSR_BREAK)) { 1115 #ifdef DDB 1116 if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) 1117 Debugger(); 1118 #endif 1119 } 1120 else if (ISSET(rsr, RSR_OERR)) { 1121 sc->sc_overflows++; 1122 if (sc->sc_errors++ == 0) 1123 callout_reset(&sc->sc_diag_ch, 60 * hz, 1124 serdiag, sc); 1125 } 1126 code = sc->sc_rbuf[get] | 1127 lsrmap[(rsr & (RSR_BREAK|RSR_FERR|RSR_PERR)) >> 3]; 1128 (*tp->t_linesw->l_rint)(code, tp); 1129 get = (get + 1) & RXBUFMASK; 1130 } 1131 1132 sc->sc_rbget = get; 1133 s = splserial(); 1134 sc->sc_rbavail += scc; 1135 /* 1136 * Buffers should be ok again, release possible block, but only if the 1137 * tty layer isn't blocking too. 1138 */ 1139 if (sc->sc_rx_blocked && !ISSET(tp->t_state, TS_TBLOCK)) { 1140 sc->sc_rx_blocked = 0; 1141 ser_hwiflow(sc, 0); 1142 } 1143 splx(s); 1144 } 1145 1146 static void 1147 sertxint(sc, tp) 1148 struct ser_softc *sc; 1149 struct tty *tp; 1150 { 1151 1152 CLR(tp->t_state, TS_BUSY); 1153 if (ISSET(tp->t_state, TS_FLUSH)) 1154 CLR(tp->t_state, TS_FLUSH); 1155 else 1156 ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf)); 1157 (*tp->t_linesw->l_start)(tp); 1158 } 1159 1160 static void 1161 sermsrint(sc, tp) 1162 struct ser_softc *sc; 1163 struct tty *tp; 1164 { 1165 u_char msr, delta; 1166 int s; 1167 1168 s = splserial(); 1169 msr = sc->sc_msr; 1170 delta = sc->sc_msr_delta; 1171 sc->sc_msr_delta = 0; 1172 splx(s); 1173 1174 if (ISSET(delta, sc->sc_msr_dcd)) { 1175 /* 1176 * Inform the tty layer that carrier detect changed. 1177 */ 1178 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msr, MCR_DCD)); 1179 } 1180 1181 if (ISSET(delta, sc->sc_msr_cts)) { 1182 /* Block or unblock output according to flow control. */ 1183 if (ISSET(msr, sc->sc_msr_cts)) { 1184 sc->sc_tx_stopped = 0; 1185 (*tp->t_linesw->l_start)(tp); 1186 } else { 1187 sc->sc_tx_stopped = 1; 1188 serstop(tp, 0); 1189 } 1190 } 1191 1192 #ifdef SER_DEBUG 1193 serstatus(sc, "sermsrint"); 1194 #endif 1195 } 1196 1197 void 1198 sersoft(arg) 1199 void *arg; 1200 { 1201 struct ser_softc *sc = arg; 1202 struct tty *tp; 1203 1204 ser_softintr_scheduled = 0; 1205 1206 tp = sc->sc_tty; 1207 if (tp == NULL) 1208 return; 1209 1210 if (!ISSET(tp->t_state, TS_ISOPEN) && (tp->t_wopen == 0)) 1211 return; 1212 1213 if (sc->sc_rx_ready) { 1214 sc->sc_rx_ready = 0; 1215 serrxint(sc, tp); 1216 } 1217 1218 if (sc->sc_st_check) { 1219 sc->sc_st_check = 0; 1220 sermsrint(sc, tp); 1221 } 1222 1223 if (sc->sc_tx_done) { 1224 sc->sc_tx_done = 0; 1225 sertxint(sc, tp); 1226 } 1227 } 1228 1229 int 1230 sermintr(arg) 1231 void *arg; 1232 { 1233 struct ser_softc *sc = arg; 1234 u_char msr, delta; 1235 1236 msr = ~MFP->mf_gpip; 1237 delta = msr ^ sc->sc_msr; 1238 sc->sc_msr = sc->sc_msr & ~(MCR_CTS|MCR_DCD|MCR_RI); 1239 sc->sc_msr |= msr & (MCR_CTS|MCR_DCD|MCR_RI); 1240 1241 if (ISSET(delta, sc->sc_msr_mask)) { 1242 sc->sc_msr_delta |= delta; 1243 1244 /* 1245 * Stop output immediately if we lose the output 1246 * flow control signal or carrier detect. 1247 */ 1248 if (ISSET(~msr, sc->sc_msr_mask)) { 1249 sc->sc_tbc = 0; 1250 sc->sc_heldtbc = 0; 1251 #ifdef SER_DEBUG 1252 serstatus(sc, "sermintr "); 1253 #endif 1254 } 1255 1256 sc->sc_st_check = 1; 1257 } 1258 if (!ser_softintr_scheduled) 1259 add_sicallback((si_farg)sersoft, sc, 0); 1260 return 1; 1261 } 1262 1263 int 1264 sertrintr(arg) 1265 void *arg; 1266 { 1267 struct ser_softc *sc = arg; 1268 u_int put, cc; 1269 u_char rsr, tsr; 1270 1271 put = sc->sc_rbput; 1272 cc = sc->sc_rbavail; 1273 1274 rsr = MFP->mf_rsr; 1275 if (ISSET(rsr, RSR_BFULL|RSR_BREAK)) { 1276 for (; ISSET(rsr, RSR_BFULL|RSR_BREAK) && cc > 0; cc--) { 1277 sc->sc_rbuf[put] = MFP->mf_udr; 1278 sc->sc_lbuf[put] = rsr; 1279 put = (put + 1) & RXBUFMASK; 1280 if ((rsr & RSR_BREAK) && (MFP->mf_rsr & RSR_BREAK)) 1281 rsr = 0; 1282 else rsr = MFP->mf_rsr; 1283 } 1284 /* 1285 * Current string of incoming characters ended because 1286 * no more data was available. Schedule a receive event 1287 * if any data was received. Drop any characters that 1288 * we couldn't handle. 1289 */ 1290 sc->sc_rbput = put; 1291 sc->sc_rbavail = cc; 1292 sc->sc_rx_ready = 1; 1293 /* 1294 * See if we are in danger of overflowing a buffer. If 1295 * so, use hardware flow control to ease the pressure. 1296 */ 1297 if (sc->sc_rx_blocked == 0 && 1298 cc < sc->sc_r_hiwat) { 1299 sc->sc_rx_blocked = 1; 1300 ser_hwiflow(sc, 1); 1301 } 1302 /* 1303 * If we're out of space, throw away any further input. 1304 */ 1305 if (!cc) { 1306 while (ISSET(rsr, RSR_BFULL|RSR_BREAK)) { 1307 rsr = MFP->mf_udr; 1308 rsr = MFP->mf_rsr; 1309 } 1310 } 1311 } 1312 1313 /* 1314 * Done handling any receive interrupts. See if data can be 1315 * transmitted as well. Schedule tx done event if no data left 1316 * and tty was marked busy. 1317 */ 1318 tsr = MFP->mf_tsr; 1319 if (ISSET(tsr, TSR_BE)) { 1320 /* 1321 * If we've delayed a parameter change, do it now, and restart 1322 * output. 1323 */ 1324 if (sc->sc_heldchange) { 1325 ser_loadchannelregs(sc); 1326 sc->sc_heldchange = 0; 1327 sc->sc_tbc = sc->sc_heldtbc; 1328 sc->sc_heldtbc = 0; 1329 } 1330 /* Output the next character, if any. */ 1331 if (sc->sc_tbc > 0) { 1332 MFP->mf_udr = *sc->sc_tba; 1333 sc->sc_tbc --; 1334 sc->sc_tba ++; 1335 } else if (sc->sc_tx_busy) { 1336 sc->sc_tx_busy = 0; 1337 sc->sc_tx_done = 1; 1338 } 1339 } 1340 1341 if (!ser_softintr_scheduled) 1342 add_sicallback((si_farg)sersoft, sc, 0); 1343 return 1; 1344 } 1345 1346 static int 1347 serspeed(speed) 1348 long speed; 1349 { 1350 #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ 1351 1352 int div, x, err; 1353 1354 if (speed <= 0) 1355 return (-1); 1356 1357 for (div = 4; div <= 64; div *= 4) { 1358 x = divrnd((SER_FREQ / div), speed); 1359 1360 /* 1361 * The value must fit in the timer-d dataregister. If 1362 * not, try another delay-mode. 1363 */ 1364 if ((x/2) > 255) 1365 continue; 1366 1367 /* 1368 * Baudrate to high for the interface or cannot be made 1369 * within tolerance. 1370 */ 1371 if (x <= 0) 1372 return (-1); 1373 1374 err = divrnd((SER_FREQ / div) * 1000, speed * x) - 1000; 1375 if (err < 0) 1376 err = -err; 1377 if (err > SER_TOLERANCE) 1378 continue; 1379 1380 /* 1381 * Translate 'div' to delay-code 1382 */ 1383 if (div == 4) 1384 div = 1; 1385 else if (div == 16) 1386 div = 3; 1387 else if (div == 64) 1388 div = 5; 1389 1390 return ((x/2) | (div << 8)); 1391 } 1392 return (-1); 1393 1394 #undef divrnd(n, q) 1395 } 1396 1397 /* 1398 * Following are all routines needed for SER to act as console 1399 */ 1400 #include <dev/cons.h> 1401 1402 void 1403 sercnprobe(cp) 1404 struct consdev *cp; 1405 { 1406 /* 1407 * Activate serial console when DCD present... 1408 */ 1409 if (MFP->mf_gpip & MCR_DCD) { 1410 cp->cn_pri = CN_DEAD; 1411 return; 1412 } 1413 for (sermajor = 0; sermajor < nchrdev; sermajor++) 1414 if (cdevsw[sermajor].d_open == seropen) 1415 break; 1416 1417 /* initialize required fields */ 1418 cp->cn_dev = makedev(sermajor, 0); /* XXX: LWP What unit? */ 1419 #ifdef SERCONSOLE 1420 cp->cn_pri = CN_REMOTE; /* Force a serial port console */ 1421 #else 1422 cp->cn_pri = CN_NORMAL; 1423 #endif 1424 } 1425 1426 void 1427 sercninit(cp) 1428 struct consdev *cp; 1429 { 1430 serinitcons(CONSBAUD); 1431 } 1432 1433 /* 1434 * Initialize UART to known state. 1435 */ 1436 void 1437 serinit(baud) 1438 int baud; 1439 { 1440 int ospeed = serspeed(baud); 1441 1442 MFP->mf_ucr = UCR_CLKDIV|UCR_8BITS|UCR_STOPB1; 1443 MFP->mf_rsr = RSR_ENAB; 1444 MFP->mf_tsr = TSR_ENAB; 1445 1446 single_inst_bclr_b(MFP->mf_tcdcr, 0x07); 1447 MFP->mf_tddr = ospeed; 1448 single_inst_bset_b(MFP->mf_tcdcr, (ospeed >> 8) & 0x0f); 1449 } 1450 1451 /* 1452 * Set UART for console use. Do normal init, then enable interrupts. 1453 */ 1454 void 1455 serinitcons(baud) 1456 int baud; 1457 { 1458 serinit(baud); 1459 1460 /* Set rts/dtr */ 1461 ym2149_rts(0); 1462 ym2149_dtr(0); 1463 1464 single_inst_bset_b(MFP->mf_imra, (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR)); 1465 } 1466 1467 int 1468 sercngetc(dev) 1469 dev_t dev; 1470 { 1471 u_char stat, c; 1472 int s; 1473 1474 s = splserial(); 1475 while (!ISSET(stat = MFP->mf_rsr, RSR_BFULL)) { 1476 if (!ISSET(stat, RSR_ENAB)) /* XXX */ 1477 MFP->mf_rsr |= RSR_ENAB; 1478 if (stat & (RSR_FERR|RSR_PERR|RSR_OERR)) 1479 c = MFP->mf_udr; 1480 } 1481 c = MFP->mf_udr; 1482 splx(s); 1483 return c; 1484 } 1485 1486 u_int s_imra; 1487 u_int s_stat1, s_stat2, s_stat3; 1488 void 1489 sercnputc(dev, c) 1490 dev_t dev; 1491 int c; 1492 { 1493 int timo; 1494 u_char stat, imra; 1495 1496 /* Mask serial interrupts */ 1497 imra = MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR); 1498 single_inst_bclr_b(MFP->mf_imra, imra); 1499 s_imra = imra; 1500 1501 /* wait for any pending transmission to finish */ 1502 timo = 50000; 1503 s_stat1 = MFP->mf_tsr; 1504 while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo) 1505 ; 1506 MFP->mf_udr = c; 1507 /* wait for this transmission to complete */ 1508 timo = 1500000; 1509 s_stat2 = MFP->mf_tsr; 1510 while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo) 1511 ; 1512 1513 s_stat3 = MFP->mf_tsr; 1514 /* Clear pending serial interrupts and re-enable */ 1515 MFP->mf_ipra = (u_int8_t)~imra; 1516 single_inst_bset_b(MFP->mf_imra, imra); 1517 } 1518 1519 void 1520 sercnpollc(dev, on) 1521 dev_t dev; 1522 int on; 1523 { 1524 1525 } 1526
Indexes created Thu Oct 02 14:10:14 GMT 2025