cy.c revision 1.40.2.1
1 /* $NetBSD: cy.c,v 1.40.2.1 2006/03/08 01:44:48 elad Exp $ */ 2 3 /* 4 * cy.c 5 * 6 * Driver for Cyclades Cyclom-8/16/32 multiport serial cards 7 * (currently not tested with Cyclom-32 cards) 8 * 9 * Timo Rossi, 1996 10 * 11 * Supports both ISA and PCI Cyclom cards 12 * 13 * Lots of debug output can be enabled by defining CY_DEBUG 14 * Some debugging counters (number of receive/transmit interrupts etc.) 15 * can be enabled by defining CY_DEBUG1 16 */ 17 18 #include <sys/cdefs.h> 19 __KERNEL_RCSID(0, "$NetBSD: cy.c,v 1.40.2.1 2006/03/08 01:44:48 elad Exp $"); 20 21 #include <sys/param.h> 22 #include <sys/ioctl.h> 23 #include <sys/syslog.h> 24 #include <sys/fcntl.h> 25 #include <sys/tty.h> 26 #include <sys/proc.h> 27 #include <sys/conf.h> 28 #include <sys/user.h> 29 #include <sys/ioctl.h> 30 #include <sys/select.h> 31 #include <sys/device.h> 32 #include <sys/malloc.h> 33 #include <sys/systm.h> 34 #include <sys/callout.h> 35 #include <sys/kauth.h> 36 37 #include <machine/bus.h> 38 39 #include <dev/ic/cd1400reg.h> 40 #include <dev/ic/cyreg.h> 41 #include <dev/ic/cyvar.h> 42 43 int cyparam(struct tty *, struct termios *); 44 void cystart(struct tty *); 45 void cy_poll(void *); 46 int cy_modem_control(struct cy_softc *, struct cy_port *, int, int); 47 void cy_enable_transmitter(struct cy_softc *, struct cy_port *); 48 void cd1400_channel_cmd(struct cy_softc *, struct cy_port *, int); 49 int cy_speed(speed_t, int *, int *, int); 50 51 extern struct cfdriver cy_cd; 52 53 dev_type_open(cyopen); 54 dev_type_close(cyclose); 55 dev_type_read(cyread); 56 dev_type_write(cywrite); 57 dev_type_ioctl(cyioctl); 58 dev_type_stop(cystop); 59 dev_type_tty(cytty); 60 dev_type_poll(cypoll); 61 62 const struct cdevsw cy_cdevsw = { 63 cyopen, cyclose, cyread, cywrite, cyioctl, 64 cystop, cytty, cypoll, nommap, ttykqfilter, D_TTY 65 }; 66 67 static int cy_open = 0; 68 static int cy_events = 0; 69 70 int cy_attached_ttys; 71 72 struct callout cy_poll_callout = CALLOUT_INITIALIZER; 73 74 /* 75 * Common probe routine 76 */ 77 int 78 cy_find(struct cy_softc *sc) 79 { 80 int cy_chip, chip; 81 u_char firmware_ver; 82 bus_space_tag_t tag = sc->sc_memt; 83 bus_space_handle_t bsh = sc->sc_bsh; 84 int bustype = sc->sc_bustype; 85 86 /* Cyclom card hardware reset */ 87 bus_space_write_1(tag, bsh, CY16_RESET << bustype, 0); 88 DELAY(500); /* wait for reset to complete */ 89 bus_space_write_1(tag, bsh, CY_CLEAR_INTR << bustype, 0); 90 91 #ifdef CY_DEBUG 92 printf("cy: card reset done\n"); 93 #endif 94 sc->sc_nchips = 0; 95 96 for (cy_chip = 0, chip = 0; cy_chip < CY_MAX_CD1400s; 97 cy_chip++, chip += (CY_CD1400_MEMSPACING << bustype)) { 98 int i; 99 100 /* 101 * the last 4 nchips are 'interleaved' with the first 4 on 102 * 32-port boards 103 */ 104 if (cy_chip == 4) 105 chip -= (CY32_ADDR_FIX << bustype); 106 107 #ifdef CY_DEBUG 108 printf("%s probe chip %d offset 0x%x ... ", 109 sc->sc_dev.dv_xname, cy_chip, chip); 110 #endif 111 112 /* wait until the chip is ready for command */ 113 DELAY(1000); 114 if (bus_space_read_1(tag, bsh, chip + 115 ((CD1400_CCR << 1) << bustype)) != 0) { 116 #ifdef CY_DEBUG 117 printf("not ready for command\n"); 118 #endif 119 break; 120 } 121 /* clear the firmware version reg. */ 122 bus_space_write_1(tag, bsh, chip + 123 ((CD1400_GFRCR << 1) << bustype), 0); 124 125 /* 126 * On Cyclom-16 references to non-existent chip 4 127 * actually access chip 0 (address line 9 not decoded). 128 * Here we check if the clearing of chip 4 GFRCR actually 129 * cleared chip 0 GFRCR. In that case we have a 16 port card. 130 */ 131 if (cy_chip == 4 && 132 bus_space_read_1(tag, bsh, /* off for chip 0 (0) + */ 133 ((CD1400_GFRCR << 1) << bustype)) == 0) 134 break; 135 136 /* reset the chip */ 137 bus_space_write_1(tag, bsh, chip + 138 ((CD1400_CCR << 1) << bustype), 139 CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET); 140 141 /* wait for the chip to initialize itself */ 142 for (i = 0; i < 200; i++) { 143 DELAY(50); 144 firmware_ver = bus_space_read_1(tag, bsh, chip + 145 ((CD1400_GFRCR << 1) << bustype)); 146 if ((firmware_ver & 0xf0) == 0x40) /* found a CD1400 */ 147 break; 148 } 149 #ifdef CY_DEBUG 150 printf("firmware version 0x%x\n", firmware_ver); 151 #endif 152 153 if ((firmware_ver & 0xf0) != 0x40) 154 break; 155 156 /* firmware version OK, CD1400 found */ 157 sc->sc_nchips++; 158 } 159 160 if (sc->sc_nchips == 0) { 161 #ifdef CY_DEBUG 162 printf("no CD1400s found\n"); 163 #endif 164 return 0; 165 } 166 #ifdef CY_DEBUG 167 printf("found %d CD1400s\n", sc->sc_nchips); 168 #endif 169 170 return 1; 171 } 172 173 void 174 cy_attach(struct cy_softc *sc) 175 { 176 int port, cy_chip, num_chips, cdu, chip; 177 int cy_clock; 178 179 num_chips = sc->sc_nchips; 180 if (num_chips == 0) 181 return; 182 183 memset(sc->sc_ports, 0, sizeof(sc->sc_ports)); 184 185 port = 0; 186 for (cy_chip = 0, chip = 0; cy_chip < num_chips; cy_chip++, 187 chip += (CY_CD1400_MEMSPACING << sc->sc_bustype)) { 188 189 if (cy_chip == 4) 190 chip -= (CY32_ADDR_FIX << sc->sc_bustype); 191 192 #ifdef CY_DEBUG 193 aprint_debug("attach CD1400 #%d offset 0x%x\n", cy_chip, chip); 194 #endif 195 sc->sc_cd1400_offs[cy_chip] = chip; 196 197 /* 198 * configure port 0 as serial port (should already be after 199 * reset) 200 */ 201 cd_write_reg(sc, cy_chip, CD1400_GCR, 0); 202 203 if (cd_read_reg(sc, cy_chip, CD1400_GFRCR) <= 0x46) 204 cy_clock = CY_CLOCK; 205 else 206 cy_clock = CY_CLOCK_60; 207 208 /* set up a receive timeout period (1ms) */ 209 cd_write_reg(sc, cy_chip, CD1400_PPR, 210 (cy_clock / CD1400_PPR_PRESCALER / 1000) + 1); 211 212 for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; cdu++) { 213 sc->sc_ports[port].cy_softc = sc; 214 sc->sc_ports[port].cy_port_num = port; 215 sc->sc_ports[port].cy_chip = cy_chip; 216 sc->sc_ports[port].cy_clock = cy_clock; 217 218 /* should we initialize anything else here? */ 219 port++; 220 } /* for(each port on one CD1400...) */ 221 222 } /* for(each CD1400 on a card... ) */ 223 224 sc->sc_nchannels = port; 225 226 aprint_normal("%s: %d channels (ttyCY%03d..ttyCY%03d)\n", 227 sc->sc_dev.dv_xname, sc->sc_nchannels, cy_attached_ttys, 228 cy_attached_ttys + (sc->sc_nchannels - 1)); 229 230 cy_attached_ttys += sc->sc_nchannels; 231 232 /* ensure an edge for the next interrupt */ 233 bus_space_write_1(sc->sc_memt, sc->sc_bsh, 234 CY_CLEAR_INTR << sc->sc_bustype, 0); 235 } 236 237 #define CYDIALOUT_MASK 0x80000 238 #define CY_DIALOUT(dev) (minor(dev) & CYDIALOUT_MASK) 239 240 #define CY_PORT(dev) cy_getport((dev)) 241 #define CY_BOARD(cy) ((cy)->cy_softc) 242 243 static struct cy_port * 244 cy_getport(dev_t dev) 245 { 246 int i, j, k, u = minor(dev) & ~CYDIALOUT_MASK; 247 struct cy_softc *sc; 248 249 for (i = 0, j = 0; i < cy_cd.cd_ndevs; i++) { 250 k = j; 251 sc = device_lookup(&cy_cd, i); 252 if (sc == NULL) 253 continue; 254 if (sc->sc_nchannels == 0) 255 continue; 256 j += sc->sc_nchannels; 257 if (j > u) 258 return (&sc->sc_ports[u - k]); 259 } 260 261 return (NULL); 262 } 263 264 /* 265 * open routine. returns zero if successful, else error code 266 */ 267 int 268 cyopen(dev_t dev, int flag, int mode, struct lwp *l) 269 { 270 struct cy_softc *sc; 271 struct cy_port *cy; 272 struct tty *tp; 273 int s, error; 274 275 cy = CY_PORT(dev); 276 if (cy == NULL) 277 return (ENXIO); 278 sc = CY_BOARD(cy); 279 280 s = spltty(); 281 if (cy->cy_tty == NULL) { 282 if ((cy->cy_tty = ttymalloc()) == NULL) { 283 splx(s); 284 printf("%s: port %d: can't allocate tty\n", 285 sc->sc_dev.dv_xname, cy->cy_port_num); 286 return (ENOMEM); 287 } 288 tty_attach(cy->cy_tty); 289 } 290 splx(s); 291 292 tp = cy->cy_tty; 293 tp->t_oproc = cystart; 294 tp->t_param = cyparam; 295 tp->t_dev = dev; 296 297 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 298 ttychars(tp); 299 tp->t_iflag = TTYDEF_IFLAG; 300 tp->t_oflag = TTYDEF_OFLAG; 301 tp->t_cflag = TTYDEF_CFLAG; 302 if (ISSET(cy->cy_openflags, TIOCFLAG_CLOCAL)) 303 SET(tp->t_cflag, CLOCAL); 304 if (ISSET(cy->cy_openflags, TIOCFLAG_CRTSCTS)) 305 SET(tp->t_cflag, CRTSCTS); 306 if (ISSET(cy->cy_openflags, TIOCFLAG_MDMBUF)) 307 SET(tp->t_cflag, MDMBUF); 308 tp->t_lflag = TTYDEF_LFLAG; 309 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 310 311 s = spltty(); 312 313 /* 314 * Allocate input ring buffer if we don't already have one 315 */ 316 if (cy->cy_ibuf == NULL) { 317 cy->cy_ibuf = malloc(CY_IBUF_SIZE, M_DEVBUF, M_NOWAIT); 318 if (cy->cy_ibuf == NULL) { 319 printf("%s: port %d: can't allocate input buffer\n", 320 sc->sc_dev.dv_xname, cy->cy_port_num); 321 splx(s); 322 return ENOMEM; 323 } 324 cy->cy_ibuf_end = cy->cy_ibuf + CY_IBUF_SIZE; 325 } 326 /* mark the ring buffer as empty */ 327 cy->cy_ibuf_rd_ptr = cy->cy_ibuf_wr_ptr = cy->cy_ibuf; 328 329 /* select CD1400 channel */ 330 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 331 cy->cy_port_num & CD1400_CAR_CHAN); 332 /* reset the channel */ 333 cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDRESET); 334 /* encode unit (port) number in LIVR */ 335 /* there is just enough space for 5 bits (32 ports) */ 336 cd_write_reg(sc, cy->cy_chip, CD1400_LIVR, 337 cy->cy_port_num << 3); 338 339 cy->cy_channel_control = 0; 340 341 /* hmm... need spltty() here? */ 342 if (cy_open == 0) { 343 cy_open = 1; 344 callout_reset(&cy_poll_callout, 1, cy_poll, NULL); 345 } 346 /* this sets parameters and raises DTR */ 347 cyparam(tp, &tp->t_termios); 348 349 ttsetwater(tp); 350 351 /* raise RTS too */ 352 cy_modem_control(sc, cy, TIOCM_RTS, DMBIS); 353 354 cy->cy_carrier_stat = 355 cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); 356 357 /* enable receiver and modem change interrupts */ 358 cd_write_reg(sc, cy->cy_chip, CD1400_SRER, 359 CD1400_SRER_MDMCH | CD1400_SRER_RXDATA); 360 361 if (CY_DIALOUT(dev) || 362 ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR) || 363 ISSET(tp->t_cflag, MDMBUF) || 364 ISSET(cy->cy_carrier_stat, CD1400_MSVR2_CD)) 365 SET(tp->t_state, TS_CARR_ON); 366 else 367 CLR(tp->t_state, TS_CARR_ON); 368 } else if (ISSET(tp->t_state, TS_XCLUDE) && 369 generic_authorize(l->l_proc->p_cred, 370 KAUTH_GENERIC_ISSUSER, 371 &l->l_proc->p_acflag) != 0) { 372 return EBUSY; 373 } else { 374 s = spltty(); 375 } 376 377 /* wait for carrier if necessary */ 378 if (!ISSET(flag, O_NONBLOCK)) { 379 while (!ISSET(tp->t_cflag, CLOCAL) && 380 !ISSET(tp->t_state, TS_CARR_ON)) { 381 tp->t_wopen++; 382 error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, 383 "cydcd", 0); 384 tp->t_wopen--; 385 if (error != 0) { 386 splx(s); 387 return error; 388 } 389 } 390 } 391 splx(s); 392 393 return (*tp->t_linesw->l_open) (dev, tp); 394 } 395 396 /* 397 * close routine. returns zero if successful, else error code 398 */ 399 int 400 cyclose(dev_t dev, int flag, int mode, struct lwp *l) 401 { 402 struct cy_softc *sc; 403 struct cy_port *cy; 404 struct tty *tp; 405 int s; 406 407 cy = CY_PORT(dev); 408 sc = CY_BOARD(cy); 409 tp = cy->cy_tty; 410 411 (*tp->t_linesw->l_close) (tp, flag); 412 s = spltty(); 413 414 if (ISSET(tp->t_cflag, HUPCL) && 415 !ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR)) { 416 /* 417 * drop DTR and RTS (should we wait for output buffer to 418 * become empty first?) 419 */ 420 cy_modem_control(sc, cy, 0, DMSET); 421 } 422 /* 423 * XXX should we disable modem change and 424 * receive interrupts here or somewhere ? 425 */ 426 CLR(tp->t_state, TS_BUSY | TS_FLUSH); 427 428 splx(s); 429 ttyclose(tp); 430 431 return 0; 432 } 433 434 /* 435 * Read routine 436 */ 437 int 438 cyread(dev_t dev, struct uio *uio, int flag) 439 { 440 struct cy_port *cy; 441 struct tty *tp; 442 443 cy = CY_PORT(dev); 444 tp = cy->cy_tty; 445 446 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 447 } 448 449 /* 450 * Write routine 451 */ 452 int 453 cywrite(dev_t dev, struct uio *uio, int flag) 454 { 455 struct cy_port *cy; 456 struct tty *tp; 457 458 cy = CY_PORT(dev); 459 tp = cy->cy_tty; 460 461 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 462 } 463 464 /* 465 * Poll routine 466 */ 467 int 468 cypoll(dev_t dev, int events, struct lwp *l) 469 { 470 struct cy_port *cy; 471 struct tty *tp; 472 473 cy = CY_PORT(dev); 474 tp = cy->cy_tty; 475 476 return ((*tp->t_linesw->l_poll)(tp, events, l)); 477 } 478 479 /* 480 * return tty pointer 481 */ 482 struct tty * 483 cytty(dev_t dev) 484 { 485 struct cy_port *cy; 486 487 cy = CY_PORT(dev); 488 489 return (cy->cy_tty); 490 } 491 492 /* 493 * ioctl routine 494 */ 495 int 496 cyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l) 497 { 498 struct cy_softc *sc; 499 struct cy_port *cy; 500 struct proc *p; 501 struct tty *tp; 502 int error; 503 504 p = l ? l->l_proc : NULL; 505 cy = CY_PORT(dev); 506 sc = CY_BOARD(cy); 507 tp = cy->cy_tty; 508 509 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 510 if (error != EPASSTHROUGH) 511 return error; 512 513 error = ttioctl(tp, cmd, data, flag, l); 514 if (error != EPASSTHROUGH) 515 return error; 516 517 /* XXX should not allow dropping DTR when dialin? */ 518 519 switch (cmd) { 520 case TIOCSBRK: /* start break */ 521 SET(cy->cy_flags, CY_F_START_BREAK); 522 cy_enable_transmitter(sc, cy); 523 break; 524 525 case TIOCCBRK: /* stop break */ 526 SET(cy->cy_flags, CY_F_END_BREAK); 527 cy_enable_transmitter(sc, cy); 528 break; 529 530 case TIOCSDTR: /* DTR on */ 531 cy_modem_control(sc, cy, TIOCM_DTR, DMBIS); 532 break; 533 534 case TIOCCDTR: /* DTR off */ 535 cy_modem_control(sc, cy, TIOCM_DTR, DMBIC); 536 break; 537 538 case TIOCMSET: /* set new modem control line values */ 539 cy_modem_control(sc, cy, *((int *) data), DMSET); 540 break; 541 542 case TIOCMBIS: /* turn modem control bits on */ 543 cy_modem_control(sc, cy, *((int *) data), DMBIS); 544 break; 545 546 case TIOCMBIC: /* turn modem control bits off */ 547 cy_modem_control(sc, cy, *((int *) data), DMBIC); 548 break; 549 550 case TIOCMGET: /* get modem control/status line state */ 551 *((int *) data) = cy_modem_control(sc, cy, 0, DMGET); 552 break; 553 554 case TIOCGFLAGS: 555 *((int *) data) = cy->cy_openflags | 556 (CY_DIALOUT(dev) ? TIOCFLAG_SOFTCAR : 0); 557 break; 558 559 case TIOCSFLAGS: 560 error = generic_authorize(p->p_cred, 561 KAUTH_GENERIC_ISSUSER, &p->p_acflag); 562 if (error != 0) 563 return EPERM; 564 565 cy->cy_openflags = *((int *) data) & 566 (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | 567 TIOCFLAG_CRTSCTS | TIOCFLAG_MDMBUF); 568 break; 569 570 default: 571 return EPASSTHROUGH; 572 } 573 574 return 0; 575 } 576 577 /* 578 * start output 579 */ 580 void 581 cystart(struct tty *tp) 582 { 583 struct cy_softc *sc; 584 struct cy_port *cy; 585 int s; 586 587 cy = CY_PORT(tp->t_dev); 588 sc = cy->cy_softc; 589 590 s = spltty(); 591 592 #ifdef CY_DEBUG1 593 cy->cy_start_count++; 594 #endif 595 596 if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) { 597 if (tp->t_outq.c_cc <= tp->t_lowat) { 598 if (ISSET(tp->t_state, TS_ASLEEP)) { 599 CLR(tp->t_state, TS_ASLEEP); 600 wakeup(&tp->t_outq); 601 } 602 selwakeup(&tp->t_wsel); 603 604 if (tp->t_outq.c_cc == 0) 605 goto out; 606 } 607 SET(tp->t_state, TS_BUSY); 608 cy_enable_transmitter(sc, cy); 609 } 610 out: 611 612 splx(s); 613 } 614 615 /* 616 * stop output 617 */ 618 void 619 cystop(struct tty *tp, int flag) 620 { 621 struct cy_port *cy; 622 int s; 623 624 cy = CY_PORT(tp->t_dev); 625 626 s = spltty(); 627 if (ISSET(tp->t_state, TS_BUSY)) { 628 if (!ISSET(tp->t_state, TS_TTSTOP)) 629 SET(tp->t_state, TS_FLUSH); 630 631 /* 632 * the transmit interrupt routine will disable transmit when it 633 * notices that CY_F_STOP has been set. 634 */ 635 SET(cy->cy_flags, CY_F_STOP); 636 } 637 splx(s); 638 } 639 640 /* 641 * parameter setting routine. 642 * returns 0 if successful, else returns error code 643 */ 644 int 645 cyparam(struct tty *tp, struct termios *t) 646 { 647 struct cy_softc *sc; 648 struct cy_port *cy; 649 int ibpr, obpr, i_clk_opt, o_clk_opt, s, opt; 650 651 cy = CY_PORT(tp->t_dev); 652 sc = CY_BOARD(cy); 653 654 if (t->c_ospeed != 0 && cy_speed(t->c_ospeed, &o_clk_opt, &obpr, cy->cy_clock) < 0) 655 return EINVAL; 656 657 if (t->c_ispeed != 0 && cy_speed(t->c_ispeed, &i_clk_opt, &ibpr, cy->cy_clock) < 0) 658 return EINVAL; 659 660 s = spltty(); 661 662 /* hang up the line is ospeed is zero, else turn DTR on */ 663 cy_modem_control(sc, cy, TIOCM_DTR, (t->c_ospeed == 0 ? DMBIC : DMBIS)); 664 665 /* channel was selected by the above call to cy_modem_control() */ 666 #if 0 667 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, port & CD1400_CAR_CHAN); 668 #endif 669 670 /* set transmit speed */ 671 if (t->c_ospeed != 0) { 672 cd_write_reg(sc, cy->cy_chip, CD1400_TCOR, o_clk_opt); 673 cd_write_reg(sc, cy->cy_chip, CD1400_TBPR, obpr); 674 } 675 /* set receive speed */ 676 if (t->c_ispeed != 0) { 677 cd_write_reg(sc, cy->cy_chip, CD1400_RCOR, i_clk_opt); 678 cd_write_reg(sc, cy->cy_chip, CD1400_RBPR, ibpr); 679 } 680 opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN 681 | (ISSET(t->c_cflag, CREAD) ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS); 682 683 if (opt != cy->cy_channel_control) { 684 cy->cy_channel_control = opt; 685 cd1400_channel_cmd(sc, cy, opt); 686 } 687 /* compute COR1 contents */ 688 opt = 0; 689 if (ISSET(t->c_cflag, PARENB)) { 690 if (ISSET(t->c_cflag, PARODD)) 691 opt |= CD1400_COR1_PARODD; 692 opt |= CD1400_COR1_PARNORMAL; 693 } 694 if (!ISSET(t->c_iflag, INPCK)) 695 opt |= CD1400_COR1_NOINPCK; /* no parity checking */ 696 697 if (ISSET(t->c_cflag, CSTOPB)) 698 opt |= CD1400_COR1_STOP2; 699 700 switch (t->c_cflag & CSIZE) { 701 case CS5: 702 opt |= CD1400_COR1_CS5; 703 break; 704 705 case CS6: 706 opt |= CD1400_COR1_CS6; 707 break; 708 709 case CS7: 710 opt |= CD1400_COR1_CS7; 711 break; 712 713 default: 714 opt |= CD1400_COR1_CS8; 715 break; 716 } 717 718 cd_write_reg(sc, cy->cy_chip, CD1400_COR1, opt); 719 720 #ifdef CY_DEBUG 721 printf("cor1 = 0x%x...", opt); 722 #endif 723 724 /* 725 * use the CD1400 automatic CTS flow control if CRTSCTS is set 726 * 727 * CD1400_COR2_ETC is used because breaks are generated with 728 * embedded transmit commands 729 */ 730 cd_write_reg(sc, cy->cy_chip, CD1400_COR2, 731 CD1400_COR2_ETC | 732 (ISSET(t->c_cflag, CRTSCTS) ? CD1400_COR2_CCTS_OFLOW : 0)); 733 734 cd_write_reg(sc, cy->cy_chip, CD1400_COR3, CY_RX_FIFO_THRESHOLD); 735 736 cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDCORCHG | 737 CD1400_CCR_COR1 | CD1400_CCR_COR2 | CD1400_CCR_COR3); 738 739 cd_write_reg(sc, cy->cy_chip, CD1400_COR4, CD1400_COR4_PFO_EXCEPTION); 740 cd_write_reg(sc, cy->cy_chip, CD1400_COR5, 0); 741 742 /* 743 * set modem change option registers to generate interrupts 744 * on carrier detect changes. 745 * 746 * if hardware RTS handshaking is used 747 * also set the handshaking threshold. 748 */ 749 if (cy->cy_clock == CY_CLOCK_60) { 750 cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd | 751 (ISSET(t->c_cflag, CRTSCTS) ? CY_RX_DTR_THRESHOLD : 0)); 752 } else { 753 cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd); 754 } 755 756 cd_write_reg(sc, cy->cy_chip, CD1400_MCOR2, CD1400_MCOR2_CDod); 757 758 /* 759 * set receive timeout to approx. 2ms 760 * could use more complex logic here... 761 * (but is it actually needed or even useful?) 762 */ 763 cd_write_reg(sc, cy->cy_chip, CD1400_RTPR, 2); 764 765 /* 766 * should do anything else here? 767 * XXX check MDMBUF handshaking like in com.c? 768 */ 769 770 splx(s); 771 return 0; 772 } 773 774 /* 775 * set/get modem line status 776 * 777 * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR 778 */ 779 int 780 cy_modem_control(struct cy_softc *sc, struct cy_port *cy, int bits, int howto) 781 { 782 struct tty *tp = cy->cy_tty; 783 int s, msvr; 784 785 s = spltty(); 786 787 /* select channel */ 788 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 789 cy->cy_port_num & CD1400_CAR_CHAN); 790 791 /* Does not manipulate RTS if it is used for flow control. */ 792 switch (howto) { 793 case DMGET: 794 bits = 0; 795 if (cy->cy_channel_control & CD1400_CCR_RCVEN) 796 bits |= TIOCM_LE; 797 msvr = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); 798 if (cy->cy_clock == CY_CLOCK_60) { 799 if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & 800 CD1400_MSVR1_RTS) 801 bits |= TIOCM_DTR; 802 if (msvr & CD1400_MSVR2_DTR) 803 bits |= TIOCM_RTS; 804 } else { 805 if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & 806 CD1400_MSVR1_RTS) 807 bits |= TIOCM_RTS; 808 if (msvr & CD1400_MSVR2_DTR) 809 bits |= TIOCM_DTR; 810 } 811 if (msvr & CD1400_MSVR2_CTS) 812 bits |= TIOCM_CTS; 813 if (msvr & CD1400_MSVR2_CD) 814 bits |= TIOCM_CD; 815 /* Not connected on some Cyclom-Y boards? */ 816 if (msvr & CD1400_MSVR2_DSR) 817 bits |= TIOCM_DSR; 818 /* Not connected on some Cyclom-8Y boards? */ 819 if (msvr & CD1400_MSVR2_RI) 820 bits |= TIOCM_RI; 821 break; 822 823 case DMSET: /* replace old values with new ones */ 824 if (cy->cy_clock == CY_CLOCK_60) { 825 if (!ISSET(tp->t_cflag, CRTSCTS)) 826 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 827 ((bits & TIOCM_RTS) ? CD1400_MSVR2_DTR : 0)); 828 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 829 ((bits & TIOCM_DTR) ? CD1400_MSVR1_RTS : 0)); 830 } else { 831 if (!ISSET(tp->t_cflag, CRTSCTS)) 832 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 833 ((bits & TIOCM_RTS) ? CD1400_MSVR1_RTS : 0)); 834 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 835 ((bits & TIOCM_DTR) ? CD1400_MSVR2_DTR : 0)); 836 } 837 break; 838 839 case DMBIS: /* set bits */ 840 if (cy->cy_clock == CY_CLOCK_60) { 841 if (!ISSET(tp->t_cflag, CRTSCTS) && 842 (bits & TIOCM_RTS) != 0) 843 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 844 CD1400_MSVR2_DTR); 845 if (bits & TIOCM_DTR) 846 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 847 CD1400_MSVR1_RTS); 848 } else { 849 if (!ISSET(tp->t_cflag, CRTSCTS) && 850 (bits & TIOCM_RTS) != 0) 851 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 852 CD1400_MSVR1_RTS); 853 if (bits & TIOCM_DTR) 854 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 855 CD1400_MSVR2_DTR); 856 } 857 break; 858 859 case DMBIC: /* clear bits */ 860 if (cy->cy_clock == CY_CLOCK_60) { 861 if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) 862 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0); 863 if (bits & TIOCM_DTR) 864 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); 865 } else { 866 if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) 867 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); 868 if (bits & TIOCM_DTR) 869 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0); 870 } 871 break; 872 } 873 splx(s); 874 return ((howto == DMGET) ? bits : 0); 875 } 876 877 /* 878 * Upper-level handler loop (called from timer interrupt?) 879 * This routine is common for multiple cards 880 */ 881 void 882 cy_poll(void *arg) 883 { 884 int card, port; 885 struct cy_softc *sc; 886 struct cy_port *cy; 887 struct tty *tp; 888 static int counter = 0; 889 #ifdef CY_DEBUG1 890 int did_something; 891 #endif 892 int s = spltty(); 893 894 if (cy_events == 0 && ++counter < 200) { 895 splx(s); 896 goto out; 897 } 898 cy_events = 0; 899 splx(s); 900 901 for (card = 0; card < cy_cd.cd_ndevs; card++) { 902 sc = device_lookup(&cy_cd, card); 903 if (sc == NULL) 904 continue; 905 906 #ifdef CY_DEBUG1 907 sc->sc_poll_count1++; 908 did_something = 0; 909 #endif 910 911 for (port = 0; port < sc->sc_nchannels; port++) { 912 cy = &sc->sc_ports[port]; 913 if ((tp = cy->cy_tty) == NULL || cy->cy_ibuf == NULL || 914 (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0)) 915 continue; 916 917 /* 918 * handle received data 919 */ 920 while (cy->cy_ibuf_rd_ptr != cy->cy_ibuf_wr_ptr) { 921 u_char line_stat; 922 int chr; 923 924 line_stat = cy->cy_ibuf_rd_ptr[0]; 925 chr = cy->cy_ibuf_rd_ptr[1]; 926 927 if (line_stat & 928 (CD1400_RDSR_BREAK | CD1400_RDSR_FE)) 929 chr |= TTY_FE; 930 if (line_stat & CD1400_RDSR_PE) 931 chr |= TTY_PE; 932 933 /* 934 * on an overrun error the data is treated as 935 * good just as it should be. 936 */ 937 938 #ifdef CY_DEBUG 939 printf("%s: port %d ttyinput 0x%x\n", 940 sc->sc_dev.dv_xname, port, chr); 941 #endif 942 943 (*tp->t_linesw->l_rint) (chr, tp); 944 945 s = spltty(); /* really necessary? */ 946 if ((cy->cy_ibuf_rd_ptr += 2) == 947 cy->cy_ibuf_end) 948 cy->cy_ibuf_rd_ptr = cy->cy_ibuf; 949 splx(s); 950 951 #ifdef CY_DEBUG1 952 did_something = 1; 953 #endif 954 } 955 956 /* 957 * If we don't have any received data in ibuf and 958 * CRTSCTS is on and RTS is turned off, it is time to 959 * turn RTS back on 960 */ 961 if (ISSET(tp->t_cflag, CRTSCTS)) { 962 /* 963 * we can't use cy_modem_control() here as it 964 * doesn't change RTS if RTSCTS is on 965 */ 966 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 967 port & CD1400_CAR_CHAN); 968 969 if (cy->cy_clock == CY_CLOCK_60) { 970 if ((cd_read_reg(sc, cy->cy_chip, 971 CD1400_MSVR2) & CD1400_MSVR2_DTR) == 0) { 972 cd_write_reg(sc, cy->cy_chip, 973 CD1400_MSVR2,CD1400_MSVR2_DTR); 974 #ifdef CY_DEBUG1 975 did_something = 1; 976 #endif 977 } 978 } else { 979 if ((cd_read_reg(sc, cy->cy_chip, 980 CD1400_MSVR1) & CD1400_MSVR1_RTS) == 0) { 981 cd_write_reg(sc, cy->cy_chip, 982 CD1400_MSVR1,CD1400_MSVR1_RTS); 983 #ifdef CY_DEBUG1 984 did_something = 1; 985 #endif 986 } 987 } 988 } 989 990 /* 991 * handle carrier changes 992 */ 993 s = spltty(); 994 if (ISSET(cy->cy_flags, CY_F_CARRIER_CHANGED)) { 995 int carrier; 996 997 CLR(cy->cy_flags, CY_F_CARRIER_CHANGED); 998 splx(s); 999 1000 carrier = ((cy->cy_carrier_stat & 1001 CD1400_MSVR2_CD) != 0); 1002 1003 #ifdef CY_DEBUG 1004 printf("cy_poll: carrier change " 1005 "(card %d, port %d, carrier %d)\n", 1006 card, port, carrier); 1007 #endif 1008 if (CY_DIALOUT(tp->t_dev) == 0 && 1009 !(*tp->t_linesw->l_modem)(tp, carrier)) 1010 cy_modem_control(sc, cy, 1011 TIOCM_DTR, DMBIC); 1012 1013 #ifdef CY_DEBUG1 1014 did_something = 1; 1015 #endif 1016 } else 1017 splx(s); 1018 1019 s = spltty(); 1020 if (ISSET(cy->cy_flags, CY_F_START)) { 1021 CLR(cy->cy_flags, CY_F_START); 1022 splx(s); 1023 1024 (*tp->t_linesw->l_start) (tp); 1025 1026 #ifdef CY_DEBUG1 1027 did_something = 1; 1028 #endif 1029 } else 1030 splx(s); 1031 1032 /* could move this to even upper level... */ 1033 if (cy->cy_fifo_overruns) { 1034 cy->cy_fifo_overruns = 0; 1035 /* 1036 * doesn't report overrun count, but 1037 * shouldn't really matter 1038 */ 1039 log(LOG_WARNING, "%s: port %d fifo overrun\n", 1040 sc->sc_dev.dv_xname, port); 1041 } 1042 if (cy->cy_ibuf_overruns) { 1043 cy->cy_ibuf_overruns = 0; 1044 log(LOG_WARNING, "%s: port %d ibuf overrun\n", 1045 sc->sc_dev.dv_xname, port); 1046 } 1047 } /* for(port...) */ 1048 #ifdef CY_DEBUG1 1049 if (did_something && counter >= 200) 1050 sc->sc_poll_count2++; 1051 #endif 1052 } /* for(card...) */ 1053 1054 counter = 0; 1055 1056 out: 1057 callout_reset(&cy_poll_callout, 1, cy_poll, NULL); 1058 } 1059 1060 /* 1061 * hardware interrupt routine 1062 */ 1063 int 1064 cy_intr(void *arg) 1065 { 1066 struct cy_softc *sc = arg; 1067 struct cy_port *cy; 1068 int cy_chip, stat; 1069 int int_serviced = 0; 1070 1071 /* 1072 * Check interrupt status of each CD1400 chip on this card 1073 * (multiple cards cannot share the same interrupt) 1074 */ 1075 for (cy_chip = 0; cy_chip < sc->sc_nchips; cy_chip++) { 1076 1077 stat = cd_read_reg(sc, cy_chip, CD1400_SVRR); 1078 if (stat == 0) 1079 continue; 1080 1081 if (ISSET(stat, CD1400_SVRR_RXRDY)) { 1082 u_char save_car, save_rir, serv_type; 1083 u_char line_stat, recv_data, n_chars; 1084 u_char *buf_p; 1085 1086 save_rir = cd_read_reg(sc, cy_chip, CD1400_RIR); 1087 save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); 1088 /* enter rx service */ 1089 cd_write_reg(sc, cy_chip, CD1400_CAR, save_rir); 1090 1091 serv_type = cd_read_reg(sc, cy_chip, CD1400_RIVR); 1092 cy = &sc->sc_ports[serv_type >> 3]; 1093 1094 #ifdef CY_DEBUG1 1095 cy->cy_rx_int_count++; 1096 #endif 1097 1098 buf_p = cy->cy_ibuf_wr_ptr; 1099 1100 if (ISSET(serv_type, CD1400_RIVR_EXCEPTION)) { 1101 line_stat = cd_read_reg(sc, cy->cy_chip, 1102 CD1400_RDSR); 1103 recv_data = cd_read_reg(sc, cy->cy_chip, 1104 CD1400_RDSR); 1105 1106 if (cy->cy_tty == NULL || 1107 !ISSET(cy->cy_tty->t_state, TS_ISOPEN)) 1108 goto end_rx_serv; 1109 1110 #ifdef CY_DEBUG 1111 printf("%s port %d recv exception, line_stat 0x%x, char 0x%x\n", 1112 sc->sc_dev.dv_xname, cy->cy_port_num, line_stat, recv_data); 1113 #endif 1114 if (ISSET(line_stat, CD1400_RDSR_OE)) 1115 cy->cy_fifo_overruns++; 1116 1117 *buf_p++ = line_stat; 1118 *buf_p++ = recv_data; 1119 if (buf_p == cy->cy_ibuf_end) 1120 buf_p = cy->cy_ibuf; 1121 1122 if (buf_p == cy->cy_ibuf_rd_ptr) { 1123 if (buf_p == cy->cy_ibuf) 1124 buf_p = cy->cy_ibuf_end; 1125 buf_p -= 2; 1126 cy->cy_ibuf_overruns++; 1127 } 1128 cy_events = 1; 1129 } else {/* no exception, received data OK */ 1130 n_chars = cd_read_reg(sc, cy->cy_chip, 1131 CD1400_RDCR); 1132 1133 /* If no tty or not open, discard data */ 1134 if (cy->cy_tty == NULL || 1135 !ISSET(cy->cy_tty->t_state, TS_ISOPEN)) { 1136 while (n_chars--) 1137 cd_read_reg(sc, cy->cy_chip, 1138 CD1400_RDSR); 1139 goto end_rx_serv; 1140 } 1141 1142 #ifdef CY_DEBUG 1143 printf("%s port %d receive ok %d chars\n", 1144 sc->sc_dev.dv_xname, cy->cy_port_num, n_chars); 1145 #endif 1146 while (n_chars--) { 1147 *buf_p++ = 0; /* status: OK */ 1148 /* data byte */ 1149 *buf_p++ = cd_read_reg(sc, 1150 cy->cy_chip, CD1400_RDSR); 1151 if (buf_p == cy->cy_ibuf_end) 1152 buf_p = cy->cy_ibuf; 1153 if (buf_p == cy->cy_ibuf_rd_ptr) { 1154 if (buf_p == cy->cy_ibuf) 1155 buf_p = cy->cy_ibuf_end; 1156 buf_p -= 2; 1157 cy->cy_ibuf_overruns++; 1158 break; 1159 } 1160 } 1161 cy_events = 1; 1162 } 1163 1164 cy->cy_ibuf_wr_ptr = buf_p; 1165 1166 /* RTS handshaking for incoming data */ 1167 if (ISSET(cy->cy_tty->t_cflag, CRTSCTS)) { 1168 int bf, msvr; 1169 1170 bf = buf_p - cy->cy_ibuf_rd_ptr; 1171 if (bf < 0) 1172 bf += CY_IBUF_SIZE; 1173 1174 if (bf > (CY_IBUF_SIZE / 2)) { 1175 /* turn RTS off */ 1176 if (cy->cy_clock == CY_CLOCK_60) 1177 msvr = CD1400_MSVR2; 1178 else 1179 msvr = CD1400_MSVR1; 1180 cd_write_reg(sc, cy->cy_chip, msvr, 0); 1181 } 1182 } 1183 1184 end_rx_serv: 1185 /* terminate service context */ 1186 cd_write_reg(sc, cy->cy_chip, CD1400_RIR, 1187 save_rir & 0x3f); 1188 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car); 1189 int_serviced = 1; 1190 } /* if (rx_service...) */ 1191 if (ISSET(stat, CD1400_SVRR_MDMCH)) { 1192 u_char save_car, save_mir, serv_type, modem_stat; 1193 1194 save_mir = cd_read_reg(sc, cy_chip, CD1400_MIR); 1195 save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); 1196 /* enter modem service */ 1197 cd_write_reg(sc, cy_chip, CD1400_CAR, save_mir); 1198 1199 serv_type = cd_read_reg(sc, cy_chip, CD1400_MIVR); 1200 cy = &sc->sc_ports[serv_type >> 3]; 1201 1202 #ifdef CY_DEBUG1 1203 cy->cy_modem_int_count++; 1204 #endif 1205 1206 modem_stat = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); 1207 1208 #ifdef CY_DEBUG 1209 printf("%s port %d modem line change, new stat 0x%x\n", 1210 sc->sc_dev.dv_xname, cy->cy_port_num, modem_stat); 1211 #endif 1212 if (ISSET((cy->cy_carrier_stat ^ modem_stat), CD1400_MSVR2_CD)) { 1213 SET(cy->cy_flags, CY_F_CARRIER_CHANGED); 1214 cy_events = 1; 1215 } 1216 cy->cy_carrier_stat = modem_stat; 1217 1218 /* terminate service context */ 1219 cd_write_reg(sc, cy->cy_chip, CD1400_MIR, save_mir & 0x3f); 1220 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car); 1221 int_serviced = 1; 1222 } /* if (modem_service...) */ 1223 if (ISSET(stat, CD1400_SVRR_TXRDY)) { 1224 u_char save_car, save_tir, serv_type, 1225 count, ch; 1226 struct tty *tp; 1227 1228 save_tir = cd_read_reg(sc, cy_chip, CD1400_TIR); 1229 save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); 1230 /* enter tx service */ 1231 cd_write_reg(sc, cy_chip, CD1400_CAR, save_tir); 1232 1233 serv_type = cd_read_reg(sc, cy_chip, CD1400_TIVR); 1234 cy = &sc->sc_ports[serv_type >> 3]; 1235 1236 #ifdef CY_DEBUG1 1237 cy->cy_tx_int_count++; 1238 #endif 1239 #ifdef CY_DEBUG 1240 printf("%s port %d tx service\n", sc->sc_dev.dv_xname, 1241 cy->cy_port_num); 1242 #endif 1243 1244 /* stop transmitting if no tty or CY_F_STOP set */ 1245 tp = cy->cy_tty; 1246 if (tp == NULL || ISSET(cy->cy_flags, CY_F_STOP)) 1247 goto txdone; 1248 1249 count = 0; 1250 if (ISSET(cy->cy_flags, CY_F_SEND_NUL)) { 1251 cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); 1252 cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); 1253 count += 2; 1254 CLR(cy->cy_flags, CY_F_SEND_NUL); 1255 } 1256 if (tp->t_outq.c_cc > 0) { 1257 SET(tp->t_state, TS_BUSY); 1258 while (tp->t_outq.c_cc > 0 && 1259 count < CD1400_TX_FIFO_SIZE) { 1260 ch = getc(&tp->t_outq); 1261 /* 1262 * remember to double NUL characters 1263 * because embedded transmit commands 1264 * are enabled 1265 */ 1266 if (ch == 0) { 1267 if (count >= CD1400_TX_FIFO_SIZE - 2) { 1268 SET(cy->cy_flags, CY_F_SEND_NUL); 1269 break; 1270 } 1271 cd_write_reg(sc, cy->cy_chip, 1272 CD1400_TDR, ch); 1273 count++; 1274 } 1275 cd_write_reg(sc, cy->cy_chip, 1276 CD1400_TDR, ch); 1277 count++; 1278 } 1279 } else { 1280 /* 1281 * no data to send -- check if we should 1282 * start/stop a break 1283 */ 1284 /* 1285 * XXX does this cause too much delay before 1286 * breaks? 1287 */ 1288 if (ISSET(cy->cy_flags, CY_F_START_BREAK)) { 1289 cd_write_reg(sc, cy->cy_chip, 1290 CD1400_TDR, 0); 1291 cd_write_reg(sc, cy->cy_chip, 1292 CD1400_TDR, 0x81); 1293 CLR(cy->cy_flags, CY_F_START_BREAK); 1294 } 1295 if (ISSET(cy->cy_flags, CY_F_END_BREAK)) { 1296 cd_write_reg(sc, cy->cy_chip, 1297 CD1400_TDR, 0); 1298 cd_write_reg(sc, cy->cy_chip, 1299 CD1400_TDR, 0x83); 1300 CLR(cy->cy_flags, CY_F_END_BREAK); 1301 } 1302 } 1303 1304 if (tp->t_outq.c_cc == 0) { 1305 txdone: 1306 /* 1307 * No data to send or requested to stop. 1308 * Disable transmit interrupt 1309 */ 1310 cd_write_reg(sc, cy->cy_chip, CD1400_SRER, 1311 cd_read_reg(sc, cy->cy_chip, CD1400_SRER) 1312 & ~CD1400_SRER_TXRDY); 1313 CLR(cy->cy_flags, CY_F_STOP); 1314 CLR(tp->t_state, TS_BUSY); 1315 } 1316 if (tp->t_outq.c_cc <= tp->t_lowat) { 1317 SET(cy->cy_flags, CY_F_START); 1318 cy_events = 1; 1319 } 1320 /* terminate service context */ 1321 cd_write_reg(sc, cy->cy_chip, CD1400_TIR, save_tir & 0x3f); 1322 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car); 1323 int_serviced = 1; 1324 } /* if (tx_service...) */ 1325 } /* for(...all CD1400s on a card) */ 1326 1327 /* ensure an edge for next interrupt */ 1328 bus_space_write_1(sc->sc_memt, sc->sc_bsh, 1329 CY_CLEAR_INTR << sc->sc_bustype, 0); 1330 return int_serviced; 1331 } 1332 1333 /* 1334 * subroutine to enable CD1400 transmitter 1335 */ 1336 void 1337 cy_enable_transmitter(struct cy_softc *sc, struct cy_port *cy) 1338 { 1339 int s = spltty(); 1340 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 1341 cy->cy_port_num & CD1400_CAR_CHAN); 1342 cd_write_reg(sc, cy->cy_chip, CD1400_SRER, 1343 cd_read_reg(sc, cy->cy_chip, CD1400_SRER) | CD1400_SRER_TXRDY); 1344 splx(s); 1345 } 1346 1347 /* 1348 * Execute a CD1400 channel command 1349 */ 1350 void 1351 cd1400_channel_cmd(struct cy_softc *sc, struct cy_port *cy, int cmd) 1352 { 1353 u_int waitcnt = 5 * 8 * 1024; /* approx 5 ms */ 1354 1355 #ifdef CY_DEBUG 1356 printf("c1400_channel_cmd cy %p command 0x%x\n", cy, cmd); 1357 #endif 1358 1359 /* wait until cd1400 is ready to process a new command */ 1360 while (cd_read_reg(sc, cy->cy_chip, CD1400_CCR) != 0 && waitcnt-- > 0); 1361 1362 if (waitcnt == 0) 1363 log(LOG_ERR, "%s: channel command timeout\n", 1364 sc->sc_dev.dv_xname); 1365 1366 cd_write_reg(sc, cy->cy_chip, CD1400_CCR, cmd); 1367 } 1368 1369 /* 1370 * Compute clock option register and baud rate register values 1371 * for a given speed. Return 0 on success, -1 on failure. 1372 * 1373 * The error between requested and actual speed seems 1374 * to be well within allowed limits (less than 3%) 1375 * with every speed value between 50 and 150000 bps. 1376 */ 1377 int 1378 cy_speed(speed_t speed, int *cor, int *bpr, int cy_clock) 1379 { 1380 int c, co, br; 1381 1382 if (speed < 50 || speed > 150000) 1383 return -1; 1384 1385 for (c = 0, co = 8; co <= 2048; co <<= 2, c++) { 1386 br = (cy_clock + (co * speed) / 2) / (co * speed); 1387 if (br < 0x100) { 1388 *bpr = br; 1389 *cor = c; 1390 return 0; 1391 } 1392 } 1393 1394 return -1; 1395 } 1396
Indexes created Mon Oct 20 20:10:13 GMT 2025