siotty.c revision 1.21
1 /* $NetBSD: siotty.c,v 1.21 2007/11/19 18:51:40 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 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 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 40 41 __KERNEL_RCSID(0, "$NetBSD: siotty.c,v 1.21 2007/11/19 18:51:40 ad Exp $"); 42 43 #include "opt_ddb.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 #include <sys/conf.h> 49 #include <sys/ioctl.h> 50 #include <sys/proc.h> 51 #include <sys/user.h> 52 #include <sys/tty.h> 53 #include <sys/uio.h> 54 #include <sys/callout.h> 55 #include <sys/fcntl.h> 56 #include <dev/cons.h> 57 #include <sys/kauth.h> 58 59 #include <machine/cpu.h> 60 61 #include <luna68k/dev/sioreg.h> 62 #include <luna68k/dev/siovar.h> 63 64 #define TIOCM_BREAK 01000 /* non standard use */ 65 66 static const u_int8_t ch0_regs[6] = { 67 WR0_RSTINT, /* reset E/S interrupt */ 68 WR1_RXALLS | WR1_TXENBL, /* Rx per char, Tx */ 69 0, /* */ 70 WR3_RX8BIT | WR3_RXENBL, /* Rx */ 71 WR4_BAUD96 | WR4_STOP1, /* Tx/Rx */ 72 WR5_TX8BIT | WR5_TXENBL | WR5_DTR | WR5_RTS, /* Tx */ 73 }; 74 75 static const struct speedtab siospeedtab[] = { 76 { 2400, WR4_BAUD24, }, 77 { 4800, WR4_BAUD48, }, 78 { 9600, WR4_BAUD96, }, 79 { -1, 0, }, 80 }; 81 82 struct siotty_softc { 83 struct device sc_dev; 84 struct tty *sc_tty; 85 struct sioreg *sc_ctl; 86 u_int sc_flags; 87 u_int8_t sc_wr[6]; 88 }; 89 90 #include "siotty.h" 91 static void siostart __P((struct tty *)); 92 static int sioparam __P((struct tty *, struct termios *)); 93 static void siottyintr __P((int)); 94 static int siomctl __P((struct siotty_softc *, int, int)); 95 96 static int siotty_match __P((struct device *, struct cfdata *, void *)); 97 static void siotty_attach __P((struct device *, struct device *, void *)); 98 99 CFATTACH_DECL(siotty, sizeof(struct siotty_softc), 100 siotty_match, siotty_attach, NULL, NULL); 101 extern struct cfdriver siotty_cd; 102 103 dev_type_open(sioopen); 104 dev_type_close(sioclose); 105 dev_type_read(sioread); 106 dev_type_write(siowrite); 107 dev_type_ioctl(sioioctl); 108 dev_type_stop(siostop); 109 dev_type_tty(siotty); 110 dev_type_poll(siopoll); 111 112 const struct cdevsw siotty_cdevsw = { 113 sioopen, sioclose, sioread, siowrite, sioioctl, 114 siostop, siotty, siopoll, nommap, ttykqfilter, D_TTY 115 }; 116 117 static int 118 siotty_match(parent, cf, aux) 119 struct device *parent; 120 struct cfdata *cf; 121 void *aux; 122 { 123 struct sio_attach_args *args = aux; 124 125 if (args->channel != 0) /* XXX allow tty on Ch.B XXX */ 126 return 0; 127 return 1; 128 } 129 130 static void 131 siotty_attach(parent, self, aux) 132 struct device *parent, *self; 133 void *aux; 134 { 135 struct sio_softc *scp = (void *)parent; 136 struct siotty_softc *sc = (void *)self; 137 struct sio_attach_args *args = aux; 138 139 sc->sc_ctl = (struct sioreg *)scp->scp_ctl + args->channel; 140 bcopy(ch0_regs, sc->sc_wr, sizeof(ch0_regs)); 141 scp->scp_intr[args->channel] = siottyintr; 142 143 if (args->hwflags == 1) { 144 printf(" (console)"); 145 sc->sc_flags = TIOCFLAG_SOFTCAR; 146 } 147 else { 148 setsioreg(sc->sc_ctl, WR0, WR0_CHANRST); 149 setsioreg(sc->sc_ctl, WR2A, WR2_VEC86 | WR2_INTR_1); 150 setsioreg(sc->sc_ctl, WR2B, 0); 151 setsioreg(sc->sc_ctl, WR0, sc->sc_wr[WR0]); 152 setsioreg(sc->sc_ctl, WR4, sc->sc_wr[WR4]); 153 setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]); 154 setsioreg(sc->sc_ctl, WR5, sc->sc_wr[WR5]); 155 setsioreg(sc->sc_ctl, WR0, sc->sc_wr[WR0]); 156 } 157 setsioreg(sc->sc_ctl, WR1, sc->sc_wr[WR1]); /* now interrupt driven */ 158 159 printf("\n"); 160 } 161 162 /*-------------------- low level routine --------------------*/ 163 164 static void 165 siottyintr(chan) 166 int chan; 167 { 168 struct siotty_softc *sc; 169 struct sioreg *sio; 170 struct tty *tp; 171 unsigned int code; 172 int rr; 173 174 if (chan >= siotty_cd.cd_ndevs) 175 return; 176 sc = siotty_cd.cd_devs[chan]; 177 tp = sc->sc_tty; 178 sio = sc->sc_ctl; 179 rr = getsiocsr(sio); 180 if (rr & RR_RXRDY) { 181 do { 182 code = sio->sio_data; 183 if (rr & (RR_FRAMING | RR_OVERRUN | RR_PARITY)) { 184 sio->sio_cmd = WR0_ERRRST; 185 if (sio->sio_stat & RR_FRAMING) 186 code |= TTY_FE; 187 else if (sio->sio_stat & RR_PARITY) 188 code |= TTY_PE; 189 } 190 if (tp == NULL || (tp->t_state & TS_ISOPEN) == 0) 191 continue; 192 #if 0 && defined(DDB) /* ?!?! fails to resume ?!?! */ 193 if ((rr & RR_BREAK) && tp->t_dev == cn_tab->cn_dev) { 194 cpu_Debugger(); 195 return; 196 } 197 #endif 198 (*tp->t_linesw->l_rint)(code, tp); 199 } while ((rr = getsiocsr(sio)) & RR_RXRDY); 200 } 201 if (rr & RR_TXRDY) { 202 sio->sio_cmd = WR0_RSTPEND; 203 if (tp != NULL) { 204 tp->t_state &= ~(TS_BUSY|TS_FLUSH); 205 (*tp->t_linesw->l_start)(tp); 206 } 207 } 208 } 209 210 static void 211 siostart(tp) 212 struct tty *tp; 213 { 214 struct siotty_softc *sc = siotty_cd.cd_devs[minor(tp->t_dev)]; 215 int s, c; 216 217 s = spltty(); 218 if (tp->t_state & (TS_BUSY|TS_TIMEOUT|TS_TTSTOP)) 219 goto out; 220 if (!ttypull(tp)) 221 goto out; 222 tp->t_state |= TS_BUSY; 223 while (getsiocsr(sc->sc_ctl) & RR_TXRDY) { 224 if ((c = getc(&tp->t_outq)) == -1) 225 break; 226 sc->sc_ctl->sio_data = c; 227 } 228 out: 229 splx(s); 230 } 231 232 void 233 siostop(tp, flag) 234 struct tty *tp; 235 int flag; 236 { 237 int s; 238 239 s = spltty(); 240 if (TS_BUSY == (tp->t_state & (TS_BUSY|TS_TTSTOP))) { 241 /* 242 * Device is transmitting; must stop it. 243 */ 244 tp->t_state |= TS_FLUSH; 245 } 246 splx(s); 247 } 248 249 static int 250 sioparam(tp, t) 251 struct tty *tp; 252 struct termios *t; 253 { 254 struct siotty_softc *sc = siotty_cd.cd_devs[minor(tp->t_dev)]; 255 int wr4, s; 256 257 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 258 return EINVAL; 259 wr4 = ttspeedtab(t->c_ospeed, siospeedtab); 260 if (wr4 < 0) 261 return EINVAL; 262 263 if (sc->sc_flags & TIOCFLAG_SOFTCAR) { 264 t->c_cflag |= CLOCAL; 265 t->c_cflag &= ~HUPCL; 266 } 267 if (sc->sc_flags & TIOCFLAG_CLOCAL) 268 t->c_cflag |= CLOCAL; 269 270 /* 271 * If there were no changes, don't do anything. This avoids dropping 272 * input and improves performance when all we did was frob things like 273 * VMIN and VTIME. 274 */ 275 if (tp->t_ospeed == t->c_ospeed && tp->t_cflag == t->c_cflag) 276 return 0; 277 278 tp->t_ispeed = t->c_ispeed; 279 tp->t_ospeed = t->c_ospeed; 280 tp->t_cflag = t->c_cflag; 281 282 sc->sc_wr[WR3] &= 0x3f; 283 sc->sc_wr[WR5] &= 0x9f; 284 switch (tp->t_cflag & CSIZE) { 285 case CS7: 286 sc->sc_wr[WR3] |= WR3_RX7BIT; sc->sc_wr[WR5] |= WR5_TX7BIT; 287 break; 288 case CS8: 289 sc->sc_wr[WR3] |= WR3_RX8BIT; sc->sc_wr[WR5] |= WR5_TX8BIT; 290 break; 291 } 292 if (tp->t_cflag & PARENB) { 293 wr4 |= WR4_PARENAB; 294 if ((tp->t_cflag & PARODD) == 0) 295 wr4 |= WR4_EPARITY; 296 } 297 wr4 |= (tp->t_cflag & CSTOPB) ? WR4_STOP2 : WR4_STOP1; 298 sc->sc_wr[WR4] = wr4; 299 300 s = spltty(); 301 setsioreg(sc->sc_ctl, WR4, sc->sc_wr[WR4]); 302 setsioreg(sc->sc_ctl, WR3, sc->sc_wr[WR3]); 303 setsioreg(sc->sc_ctl, WR5, sc->sc_wr[WR5]); 304 splx(s); 305 306 return 0; 307 } 308 309 static int 310 siomctl(sc, control, op) 311 struct siotty_softc *sc; 312 int control, op; 313 { 314 int val, s, wr5, rr; 315 316 val = 0; 317 if (control & TIOCM_BREAK) 318 val |= WR5_BREAK; 319 if (control & TIOCM_DTR) 320 val |= WR5_DTR; 321 if (control & TIOCM_RTS) 322 val |= WR5_RTS; 323 s = spltty(); 324 wr5 = sc->sc_wr[WR5]; 325 switch (op) { 326 case DMSET: 327 wr5 &= ~(WR5_BREAK|WR5_DTR|WR5_RTS); 328 /* FALLTHRU */ 329 case DMBIS: 330 wr5 |= val; 331 break; 332 case DMBIC: 333 wr5 &= ~val; 334 break; 335 case DMGET: 336 val = 0; 337 rr = getsiocsr(sc->sc_ctl); 338 if (wr5 & WR5_DTR) 339 val |= TIOCM_DTR; 340 if (wr5 & WR5_RTS) 341 val |= TIOCM_RTS; 342 if (rr & RR_CTS) 343 val |= TIOCM_CTS; 344 if (rr & RR_DCD) 345 val |= TIOCM_CD; 346 goto done; 347 } 348 sc->sc_wr[WR5] = wr5; 349 setsioreg(sc->sc_ctl, WR5, wr5); 350 val = 0; 351 done: 352 splx(s); 353 return val; 354 } 355 356 /*-------------------- cdevsw[] interface --------------------*/ 357 358 int 359 sioopen(dev, flag, mode, l) 360 dev_t dev; 361 int flag, mode; 362 struct lwp *l; 363 { 364 struct siotty_softc *sc; 365 struct tty *tp; 366 int error; 367 368 if ((sc = siotty_cd.cd_devs[minor(dev)]) == NULL) 369 return ENXIO; 370 if ((tp = sc->sc_tty) == NULL) { 371 tp = sc->sc_tty = ttymalloc(); 372 tty_attach(tp); 373 } 374 375 tp->t_oproc = siostart; 376 tp->t_param = sioparam; 377 tp->t_hwiflow = NULL /* XXX siohwiflow XXX */; 378 tp->t_dev = dev; 379 380 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 381 return (EBUSY); 382 383 if ((tp->t_state & TS_ISOPEN) == 0 && tp->t_wopen == 0) { 384 struct termios t; 385 386 t.c_ispeed = t.c_ospeed = TTYDEF_SPEED; 387 t.c_cflag = TTYDEF_CFLAG; 388 tp->t_ospeed = 0; /* force register update */ 389 (void)sioparam(tp, &t); 390 tp->t_iflag = TTYDEF_IFLAG; 391 tp->t_oflag = TTYDEF_OFLAG; 392 tp->t_lflag = TTYDEF_LFLAG; 393 ttychars(tp); 394 ttsetwater(tp); 395 /* raise RTS and DTR here; but, DTR lead is not wired */ 396 /* then check DCD condition; but, DCD lead is not wired */ 397 tp->t_state |= TS_CARR_ON; /* assume detected all the time */ 398 #if 0 399 if ((sc->sc_flags & TIOCFLAG_SOFTCAR) 400 || (tp->t_cflag & MDMBUF) 401 || (getsiocsr(sc->sc_ctl) & RR_DCD)) 402 tp->t_state |= TS_CARR_ON; 403 else 404 tp->t_state &= ~TS_CARR_ON; 405 #endif 406 } 407 408 error = ttyopen(tp, 0, (flag & O_NONBLOCK)); 409 if (error > 0) 410 return error; 411 return (*tp->t_linesw->l_open)(dev, tp); 412 } 413 414 int 415 sioclose(dev, flag, mode, l) 416 dev_t dev; 417 int flag, mode; 418 struct lwp *l; 419 { 420 struct siotty_softc *sc = siotty_cd.cd_devs[minor(dev)]; 421 struct tty *tp = sc->sc_tty; 422 int s; 423 424 (*tp->t_linesw->l_close)(tp, flag); 425 426 s = spltty(); 427 siomctl(sc, TIOCM_BREAK, DMBIC); 428 #if 0 /* because unable to feed DTR signal */ 429 if ((tp->t_cflag & HUPCL) 430 || tp->t_wopen || (tp->t_state & TS_ISOPEN) == 0) { 431 siomctl(sc, TIOCM_DTR, DMBIC); 432 /* Yield CPU time to others for 1 second, then ... */ 433 siomctl(sc, TIOCM_DTR, DMBIS); 434 } 435 #endif 436 splx(s); 437 return ttyclose(tp); 438 } 439 440 int 441 sioread(dev, uio, flag) 442 dev_t dev; 443 struct uio *uio; 444 int flag; 445 { 446 struct siotty_softc *sc = siotty_cd.cd_devs[minor(dev)]; 447 struct tty *tp = sc->sc_tty; 448 449 return (*tp->t_linesw->l_read)(tp, uio, flag); 450 } 451 452 int 453 siowrite(dev, uio, flag) 454 dev_t dev; 455 struct uio *uio; 456 int flag; 457 { 458 struct siotty_softc *sc = siotty_cd.cd_devs[minor(dev)]; 459 struct tty *tp = sc->sc_tty; 460 461 return (*tp->t_linesw->l_write)(tp, uio, flag); 462 } 463 464 int 465 siopoll(dev, events, l) 466 dev_t dev; 467 int events; 468 struct lwp *l; 469 { 470 struct siotty_softc *sc = siotty_cd.cd_devs[minor(dev)]; 471 struct tty *tp = sc->sc_tty; 472 473 return ((*tp->t_linesw->l_poll)(tp, events, l)); 474 } 475 476 int 477 sioioctl(dev, cmd, data, flag, l) 478 dev_t dev; 479 u_long cmd; 480 void *data; 481 int flag; 482 struct lwp *l; 483 { 484 struct siotty_softc *sc = siotty_cd.cd_devs[minor(dev)]; 485 struct tty *tp = sc->sc_tty; 486 int error; 487 488 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 489 if (error != EPASSTHROUGH) 490 return error; 491 492 error = ttioctl(tp, cmd, data, flag, l); 493 if (error != EPASSTHROUGH) 494 return error; 495 496 /* the last resort for TIOC ioctl tranversing */ 497 switch (cmd) { 498 case TIOCSBRK: /* Set the hardware into BREAK condition */ 499 siomctl(sc, TIOCM_BREAK, DMBIS); 500 break; 501 case TIOCCBRK: /* Clear the hardware BREAK condition */ 502 siomctl(sc, TIOCM_BREAK, DMBIC); 503 break; 504 case TIOCSDTR: /* Assert DTR signal */ 505 siomctl(sc, TIOCM_DTR|TIOCM_RTS, DMBIS); 506 break; 507 case TIOCCDTR: /* Clear DTR signal */ 508 siomctl(sc, TIOCM_DTR|TIOCM_RTS, DMBIC); 509 break; 510 case TIOCMSET: /* Set modem state replacing current one */ 511 siomctl(sc, *(int *)data, DMSET); 512 break; 513 case TIOCMGET: /* Return current modem state */ 514 *(int *)data = siomctl(sc, 0, DMGET); 515 break; 516 case TIOCMBIS: /* Set individual bits of modem state */ 517 siomctl(sc, *(int *)data, DMBIS); 518 break; 519 case TIOCMBIC: /* Clear individual bits of modem state */ 520 siomctl(sc, *(int *)data, DMBIC); 521 break; 522 case TIOCSFLAGS: /* Instruct how serial port behaves */ 523 sc->sc_flags = *(int *)data; 524 break; 525 case TIOCGFLAGS: /* Return current serial port state */ 526 *(int *)data = sc->sc_flags; 527 break; 528 default: 529 return EPASSTHROUGH; 530 } 531 return 0; 532 } 533 534 /* ARSGUSED */ 535 struct tty * 536 siotty(dev) 537 dev_t dev; 538 { 539 struct siotty_softc *sc = siotty_cd.cd_devs[minor(dev)]; 540 541 return sc->sc_tty; 542 } 543 544 /*-------------------- miscelleneous routine --------------------*/ 545 546 /* EXPORT */ void 547 setsioreg(sio, regno, val) 548 struct sioreg *sio; 549 int regno, val; 550 { 551 if (regno != 0) 552 sio->sio_cmd = regno; /* DELAY(); */ 553 sio->sio_cmd = val; /* DELAY(); */ 554 } 555 556 /* EXPORT */ int 557 getsiocsr(sio) 558 struct sioreg *sio; 559 { 560 int val; 561 562 val = sio->sio_stat << 8; /* DELAY(); */ 563 sio->sio_cmd = 1; /* DELAY(); */ 564 val |= sio->sio_stat; /* DELAY(); */ 565 return val; 566 } 567 568 /*--------------------- console interface ----------------------*/ 569 570 void syscnattach __P((int)); 571 int syscngetc __P((dev_t)); 572 void syscnputc __P((dev_t, int)); 573 574 struct consdev syscons = { 575 NULL, 576 NULL, 577 syscngetc, 578 syscnputc, 579 nullcnpollc, 580 NULL, 581 NULL, 582 NULL, 583 NODEV, 584 CN_REMOTE, 585 }; 586 587 /* EXPORT */ void 588 syscnattach(channel) 589 int channel; 590 { 591 /* 592 * Channel A is immediately initialized with 9600N1 right after cold 593 * boot/reset/poweron. ROM monitor emits one line message on CH.A. 594 */ 595 struct sioreg *sio; 596 sio = (struct sioreg *)0x51000000 + channel; 597 598 syscons.cn_dev = makedev(cdevsw_lookup_major(&siotty_cdevsw), 599 channel); 600 cn_tab = &syscons; 601 602 setsioreg(sio, WR0, WR0_CHANRST); 603 setsioreg(sio, WR2A, WR2_VEC86 | WR2_INTR_1); 604 setsioreg(sio, WR2B, 0); 605 setsioreg(sio, WR0, ch0_regs[WR0]); 606 setsioreg(sio, WR4, ch0_regs[WR4]); 607 setsioreg(sio, WR3, ch0_regs[WR3]); 608 setsioreg(sio, WR5, ch0_regs[WR5]); 609 setsioreg(sio, WR0, ch0_regs[WR0]); 610 } 611 612 /* EXPORT */ int 613 syscngetc(dev) 614 dev_t dev; 615 { 616 struct sioreg *sio; 617 int s, c; 618 619 sio = (struct sioreg *)0x51000000 + ((int)dev & 0x1); 620 s = splhigh(); 621 while ((getsiocsr(sio) & RR_RXRDY) == 0) 622 ; 623 c = sio->sio_data; 624 splx(s); 625 626 return c; 627 } 628 629 /* EXPORT */ void 630 syscnputc(dev, c) 631 dev_t dev; 632 int c; 633 { 634 struct sioreg *sio; 635 int s; 636 637 sio = (struct sioreg *)0x51000000 + ((int)dev & 0x1); 638 s = splhigh(); 639 while ((getsiocsr(sio) & RR_TXRDY) == 0) 640 ; 641 sio->sio_cmd = WR0_RSTPEND; 642 sio->sio_data = c; 643 splx(s); 644 } 645
Indexes created Fri Sep 26 20:09:58 GMT 2025