cy.c revision 1.4
1 /* $NetBSD: cy.c,v 1.4 1996/10/13 01:37:21 christos 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 * Uses CD1400 automatic CTS flow control, and 14 * if CY_HW_RTS is defined, uses CD1400 automatic input flow control. 15 * This requires a special cable that exchanges the RTS and DTR lines. 16 * 17 * Lots of debug output can be enabled by defining CY_DEBUG 18 * Some debugging counters (number of receive/transmit interrupts etc.) 19 * can be enabled by defining CY_DEBUG1 20 * 21 * This version uses the bus_mem/io_??() stuff 22 * 23 */ 24 25 #include <sys/types.h> 26 #include <sys/param.h> 27 #include <sys/ioctl.h> 28 #include <sys/syslog.h> 29 #include <sys/fcntl.h> 30 #include <sys/tty.h> 31 #include <sys/proc.h> 32 #include <sys/conf.h> 33 #include <sys/user.h> 34 #include <sys/ioctl.h> 35 #include <sys/select.h> 36 #include <sys/device.h> 37 #include <sys/malloc.h> 38 #include <sys/systm.h> 39 #include <machine/bus.h> 40 41 #include <dev/ic/cd1400reg.h> 42 #include <dev/ic/cyreg.h> 43 #include <dev/ic/cyvar.h> 44 45 /* Macros to clear/set/test flags. */ 46 #define SET(t, f) (t) |= (f) 47 #define CLR(t, f) (t) &= ~(f) 48 #define ISSET(t, f) ((t) & (f)) 49 50 static int cyparam __P((struct tty *, struct termios *)); 51 static void cystart __P((struct tty *)); 52 static void cy_poll __P((void *)); 53 static int cy_modem_control __P((struct cy_softc *, 54 struct cy_port *, int, int)); 55 static void cy_enable_transmitter __P((struct cy_softc *, struct cy_port *)); 56 static void cd1400_channel_cmd __P((struct cy_softc *, struct cy_port *, int)); 57 static int cy_speed __P((speed_t, int *, int *)); 58 59 struct cfdriver cy_cd = { 60 NULL, "cy", DV_TTY 61 }; 62 63 static int cy_open = 0; 64 static int cy_events = 0; 65 66 cdev_decl(cy); 67 68 /* 69 * Common probe routine 70 */ 71 int 72 cy_find(sc) 73 struct cy_softc *sc; 74 { 75 int cy_chip, chip; 76 u_char firmware_ver; 77 bus_chipset_tag_t bc = sc->sc_bc; 78 bus_mem_handle_t memh = sc->sc_memh; 79 int bustype = sc->sc_bustype; 80 81 /* Cyclom card hardware reset */ 82 bus_mem_write_1(bc, memh, CY16_RESET << bustype, 0); 83 DELAY(500); /* wait for reset to complete */ 84 bus_mem_write_1(bc, memh, CY_CLEAR_INTR << bustype, 0); 85 86 #ifdef CY_DEBUG 87 printf("cy: card reset done\n"); 88 #endif 89 sc->sc_nchips = 0; 90 91 for (cy_chip = 0, chip = 0; cy_chip < CY_MAX_CD1400s; 92 cy_chip++, chip += (CY_CD1400_MEMSPACING << bustype)) { 93 int i; 94 95 /* 96 * the last 4 nchips are 'interleaved' with the first 4 on 97 * 32-port boards 98 */ 99 if (cy_chip == 4) 100 chip -= (CY32_ADDR_FIX << bustype); 101 102 #ifdef CY_DEBUG 103 printf("%s probe chip %d offset 0x%lx ... ", 104 sc->sc_dev.dv_xname, cy_chip, chip); 105 #endif 106 107 /* wait until the chip is ready for command */ 108 DELAY(1000); 109 if (bus_mem_read_1(bc, memh, chip + 110 ((CD1400_CCR << 1) << bustype)) != 0) { 111 #ifdef CY_DEBUG 112 printf("not ready for command\n"); 113 #endif 114 break; 115 } 116 /* clear the firmware version reg. */ 117 bus_mem_write_1(bc, memh, chip + 118 ((CD1400_GFRCR << 1) << bustype), 0); 119 120 /* 121 * On Cyclom-16 references to non-existent chip 4 122 * actually access chip 0 (address line 9 not decoded). 123 * Here we check if the clearing of chip 4 GFRCR actually 124 * cleared chip 0 GFRCR. In that case we have a 16 port card. 125 */ 126 if (cy_chip == 4 && 127 bus_mem_read_1(bc, memh, chip + 128 ((CD1400_GFRCR << 1) << bustype)) == 0) 129 break; 130 131 /* reset the chip */ 132 bus_mem_write_1(bc, memh, chip + 133 ((CD1400_CCR << 1) << bustype), 134 CD1400_CCR_CMDRESET | CD1400_CCR_FULLRESET); 135 136 /* wait for the chip to initialize itself */ 137 for (i = 0; i < 200; i++) { 138 DELAY(50); 139 firmware_ver = bus_mem_read_1(bc, memh, chip + 140 ((CD1400_GFRCR << 1) << bustype)); 141 if ((firmware_ver & 0xf0) == 0x40) /* found a CD1400 */ 142 break; 143 } 144 #ifdef CY_DEBUG 145 printf("firmware version 0x%x\n", firmware_ver); 146 #endif 147 148 if ((firmware_ver & 0xf0) != 0x40) 149 break; 150 151 /* firmware version OK, CD1400 found */ 152 sc->sc_nchips++; 153 } 154 155 if (sc->sc_nchips == 0) { 156 #ifdef CY_DEBUG 157 printf("no CD1400s found\n"); 158 #endif 159 return 0; 160 } 161 #ifdef CY_DEBUG 162 printf("found %d CD1400s\n", sc->sc_nchips); 163 #endif 164 165 return 1; 166 } 167 168 void 169 cy_attach(parent, self, aux) 170 struct device *parent, *self; 171 void *aux; 172 { 173 int port, cy_chip, num_chips, cdu, chip; 174 struct cy_softc *sc = (void *) self; 175 176 num_chips = sc->sc_nchips; 177 if (num_chips == 0) 178 return; 179 180 bzero(sc->sc_ports, sizeof(sc->sc_ports)); 181 182 port = 0; 183 for (cy_chip = 0, chip = 0; cy_chip < num_chips; cy_chip++, 184 chip += (CY_CD1400_MEMSPACING << sc->sc_bustype)) { 185 186 if (cy_chip == 4) 187 chip -= (CY32_ADDR_FIX << sc->sc_bustype); 188 189 #ifdef CY_DEBUG 190 printf("attach CD1400 #%d offset 0x%x\n", cy_chip, chip); 191 #endif 192 sc->sc_cd1400_offs[cy_chip] = chip; 193 194 /* 195 * configure port 0 as serial port (should already be after 196 * reset) 197 */ 198 cd_write_reg(sc, cy_chip, CD1400_GCR, 0); 199 200 /* set up a receive timeout period (1ms) */ 201 cd_write_reg(sc, cy_chip, CD1400_PPR, 202 (CY_CLOCK / CD1400_PPR_PRESCALER / 1000) + 1); 203 204 for (cdu = 0; cdu < CD1400_NO_OF_CHANNELS; cdu++) { 205 sc->sc_ports[port].cy_port_num = port; 206 sc->sc_ports[port].cy_chip = chip; 207 208 /* should we initialize anything else here? */ 209 port++; 210 } /* for(each port on one CD1400...) */ 211 212 } /* for(each CD1400 on a card... ) */ 213 214 printf(" (%d ports)\n", port); 215 216 /* ensure an edge for the next interrupt */ 217 bus_mem_write_1(sc->sc_bc, sc->sc_memh, 218 CY_CLEAR_INTR << sc->sc_bustype, 0); 219 } 220 221 /* 222 * open routine. returns zero if successfull, else error code 223 */ 224 int 225 cyopen(dev, flag, mode, p) 226 dev_t dev; 227 int flag, mode; 228 struct proc *p; 229 { 230 int card = CY_CARD(dev); 231 int port = CY_PORT(dev); 232 struct cy_softc *sc; 233 struct cy_port *cy; 234 struct tty *tp; 235 int s, error; 236 237 #ifdef CY_DEBUG 238 printf("cy%d open port %d flag 0x%x mode 0x%x\n", 239 card, port, flag, mode); 240 #endif 241 242 if (card >= cy_cd.cd_ndevs || (sc = cy_cd.cd_devs[card]) == NULL) 243 return ENXIO; 244 245 cy = &sc->sc_ports[port]; 246 247 s = spltty(); 248 if (cy->cy_tty == NULL) { 249 if ((cy->cy_tty = ttymalloc()) == NULL) { 250 splx(s); 251 printf("cy%d: port %d: can't allocate tty\n", 252 card, port); 253 return ENOMEM; 254 } 255 tty_attach(cy->cy_tty); 256 } 257 splx(s); 258 259 tp = cy->cy_tty; 260 tp->t_oproc = cystart; 261 tp->t_param = cyparam; 262 tp->t_dev = dev; 263 264 if (!ISSET(tp->t_state, TS_ISOPEN)) { 265 SET(tp->t_state, TS_WOPEN); 266 ttychars(tp); 267 tp->t_iflag = TTYDEF_IFLAG; 268 tp->t_oflag = TTYDEF_OFLAG; 269 tp->t_cflag = TTYDEF_CFLAG; 270 if (ISSET(cy->cy_openflags, TIOCFLAG_CLOCAL)) 271 SET(tp->t_cflag, CLOCAL); 272 if (ISSET(cy->cy_openflags, TIOCFLAG_CRTSCTS)) 273 SET(tp->t_cflag, CRTSCTS); 274 if (ISSET(cy->cy_openflags, TIOCFLAG_MDMBUF)) 275 SET(tp->t_cflag, MDMBUF); 276 tp->t_lflag = TTYDEF_LFLAG; 277 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 278 279 s = spltty(); 280 281 /* 282 * Allocate input ring buffer if we don't already have one 283 */ 284 if (cy->cy_ibuf == NULL) { 285 cy->cy_ibuf = malloc(CY_IBUF_SIZE, M_DEVBUF, M_NOWAIT); 286 if (cy->cy_ibuf == NULL) { 287 printf("%s: port %d: can't allocate input buffer\n", 288 sc->sc_dev.dv_xname, port); 289 splx(s); 290 return ENOMEM; 291 } 292 cy->cy_ibuf_end = cy->cy_ibuf + CY_IBUF_SIZE; 293 } 294 /* mark the ring buffer as empty */ 295 cy->cy_ibuf_rd_ptr = cy->cy_ibuf_wr_ptr = cy->cy_ibuf; 296 297 /* select CD1400 channel */ 298 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 299 port & CD1400_CAR_CHAN); 300 /* reset the channel */ 301 cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDRESET); 302 /* encode unit (port) number in LIVR */ 303 /* there is just enough space for 5 bits (32 ports) */ 304 cd_write_reg(sc, cy->cy_chip, CD1400_LIVR, port << 3); 305 306 cy->cy_channel_control = 0; 307 308 /* hmm... need spltty() here? */ 309 if (cy_open == 0) { 310 cy_open = 1; 311 timeout(cy_poll, NULL, 1); 312 } 313 /* this sets parameters and raises DTR */ 314 cyparam(tp, &tp->t_termios); 315 316 ttsetwater(tp); 317 318 /* raise RTS too */ 319 cy_modem_control(sc, cy, TIOCM_RTS, DMBIS); 320 321 cy->cy_carrier_stat = 322 cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); 323 324 /* enable receiver and modem change interrupts */ 325 cd_write_reg(sc, cy->cy_chip, CD1400_SRER, 326 CD1400_SRER_MDMCH | CD1400_SRER_RXDATA); 327 328 if (CY_DIALOUT(dev) || 329 ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR) || 330 ISSET(tp->t_cflag, MDMBUF) || 331 ISSET(cy->cy_carrier_stat, CD1400_MSVR2_CD)) 332 SET(tp->t_state, TS_CARR_ON); 333 else 334 CLR(tp->t_state, TS_CARR_ON); 335 } else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) { 336 return EBUSY; 337 } else { 338 s = spltty(); 339 } 340 341 /* wait for carrier if necessary */ 342 if (!ISSET(flag, O_NONBLOCK)) { 343 while (!ISSET(tp->t_cflag, CLOCAL) && 344 !ISSET(tp->t_state, TS_CARR_ON)) { 345 SET(tp->t_state, TS_WOPEN); 346 error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, 347 "cydcd", 0); 348 if (error != 0) { 349 splx(s); 350 return error; 351 } 352 } 353 } 354 splx(s); 355 356 return (*linesw[tp->t_line].l_open) (dev, tp); 357 } 358 359 /* 360 * close routine. returns zero if successfull, else error code 361 */ 362 int 363 cyclose(dev, flag, mode, p) 364 dev_t dev; 365 int flag, mode; 366 struct proc *p; 367 { 368 int card = CY_CARD(dev); 369 int port = CY_PORT(dev); 370 struct cy_softc *sc = cy_cd.cd_devs[card]; 371 struct cy_port *cy = &sc->sc_ports[port]; 372 struct tty *tp = cy->cy_tty; 373 int s; 374 375 #ifdef CY_DEBUG 376 printf("%s: close port %d, flag 0x%x, mode 0x%x\n", 377 sc->sc_dev.dv_xname, port, flag, mode); 378 #endif 379 380 (*linesw[tp->t_line].l_close) (tp, flag); 381 s = spltty(); 382 383 if (ISSET(tp->t_cflag, HUPCL) && 384 !ISSET(cy->cy_openflags, TIOCFLAG_SOFTCAR)) { 385 /* 386 * drop DTR and RTS (should we wait for output buffer to 387 * become empty first?) 388 */ 389 cy_modem_control(sc, cy, 0, DMSET); 390 } 391 /* 392 * XXX should we disable modem change and 393 * receive interrupts here or somewhere ? 394 */ 395 CLR(tp->t_state, TS_BUSY | TS_FLUSH); 396 397 splx(s); 398 ttyclose(tp); 399 400 return 0; 401 } 402 403 /* 404 * Read routine 405 */ 406 int 407 cyread(dev, uio, flag) 408 dev_t dev; 409 struct uio *uio; 410 int flag; 411 { 412 int card = CY_CARD(dev); 413 int port = CY_PORT(dev); 414 struct cy_softc *sc = cy_cd.cd_devs[card]; 415 struct cy_port *cy = &sc->sc_ports[port]; 416 struct tty *tp = cy->cy_tty; 417 418 #ifdef CY_DEBUG 419 printf("%s: read port %d uio 0x%x flag 0x%x\n", 420 sc->sc_dev.dv_xname, port, uio, flag); 421 #endif 422 423 return ((*linesw[tp->t_line].l_read) (tp, uio, flag)); 424 } 425 426 /* 427 * Write routine 428 */ 429 int 430 cywrite(dev, uio, flag) 431 dev_t dev; 432 struct uio *uio; 433 int flag; 434 { 435 int card = CY_CARD(dev); 436 int port = CY_PORT(dev); 437 struct cy_softc *sc = cy_cd.cd_devs[card]; 438 struct cy_port *cy = &sc->sc_ports[port]; 439 struct tty *tp = cy->cy_tty; 440 441 #ifdef CY_DEBUG 442 printf("%s: write port %d uio 0x%x flag 0x%x\n", 443 sc->sc_dev.dv_xname, port, uio, flag); 444 #endif 445 446 return ((*linesw[tp->t_line].l_write) (tp, uio, flag)); 447 } 448 449 /* 450 * return tty pointer 451 */ 452 struct tty * 453 cytty(dev) 454 dev_t dev; 455 { 456 int card = CY_CARD(dev); 457 int port = CY_PORT(dev); 458 struct cy_softc *sc = cy_cd.cd_devs[card]; 459 struct cy_port *cy = &sc->sc_ports[port]; 460 struct tty *tp = cy->cy_tty; 461 462 #ifdef CY_DEBUG 463 printf("%s: tty port %d tp 0x%x\n", sc->sc_dev.dv_xname, port, tp); 464 #endif 465 return tp; 466 } 467 468 /* 469 * ioctl routine 470 */ 471 int 472 cyioctl(dev, cmd, data, flag, p) 473 dev_t dev; 474 u_long cmd; 475 caddr_t data; 476 int flag; 477 struct proc *p; 478 { 479 int card = CY_CARD(dev); 480 int port = CY_PORT(dev); 481 struct cy_softc *sc = cy_cd.cd_devs[card]; 482 struct cy_port *cy = &sc->sc_ports[port]; 483 struct tty *tp = cy->cy_tty; 484 int error; 485 486 #ifdef CY_DEBUG 487 printf("%s: port %d ioctl cmd 0x%x data 0x%x flag 0x%x\n", 488 sc->sc_dev.dv_xname, port, cmd, data, flag); 489 #endif 490 491 error = (*linesw[tp->t_line].l_ioctl) (tp, cmd, data, flag, p); 492 if (error >= 0) 493 return error; 494 495 error = ttioctl(tp, cmd, data, flag, p); 496 if (error >= 0) 497 return error; 498 499 /* XXX should not allow dropping DTR when dialin? */ 500 501 switch (cmd) { 502 case TIOCSBRK: /* start break */ 503 SET(cy->cy_flags, CY_F_START_BREAK); 504 cy_enable_transmitter(sc, cy); 505 break; 506 507 case TIOCCBRK: /* stop break */ 508 SET(cy->cy_flags, CY_F_END_BREAK); 509 cy_enable_transmitter(sc, cy); 510 break; 511 512 case TIOCSDTR: /* DTR on */ 513 cy_modem_control(sc, cy, TIOCM_DTR, DMBIS); 514 break; 515 516 case TIOCCDTR: /* DTR off */ 517 cy_modem_control(sc, cy, TIOCM_DTR, DMBIC); 518 break; 519 520 case TIOCMSET: /* set new modem control line values */ 521 cy_modem_control(sc, cy, *((int *) data), DMSET); 522 break; 523 524 case TIOCMBIS: /* turn modem control bits on */ 525 cy_modem_control(sc, cy, *((int *) data), DMBIS); 526 break; 527 528 case TIOCMBIC: /* turn modem control bits off */ 529 cy_modem_control(sc, cy, *((int *) data), DMBIC); 530 break; 531 532 case TIOCMGET: /* get modem control/status line state */ 533 *((int *) data) = cy_modem_control(sc, cy, 0, DMGET); 534 break; 535 536 case TIOCGFLAGS: 537 *((int *) data) = cy->cy_openflags | 538 (CY_DIALOUT(dev) ? TIOCFLAG_SOFTCAR : 0); 539 break; 540 541 case TIOCSFLAGS: 542 error = suser(p->p_ucred, &p->p_acflag); 543 if (error != 0) 544 return EPERM; 545 546 cy->cy_openflags = *((int *) data) & 547 (TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | 548 TIOCFLAG_CRTSCTS | TIOCFLAG_MDMBUF); 549 break; 550 551 default: 552 return ENOTTY; 553 } 554 555 return 0; 556 } 557 558 /* 559 * start output 560 */ 561 void 562 cystart(tp) 563 struct tty *tp; 564 { 565 int card = CY_CARD(tp->t_dev); 566 int port = CY_PORT(tp->t_dev); 567 struct cy_softc *sc = cy_cd.cd_devs[card]; 568 struct cy_port *cy = &sc->sc_ports[port]; 569 int s; 570 571 #ifdef CY_DEBUG 572 printf("%s: port %d start, tty 0x%x\n", sc->sc_dev.dv_xname, port, tp); 573 #endif 574 575 576 s = spltty(); 577 578 #ifdef CY_DEBUG1 579 cy->cy_start_count++; 580 #endif 581 582 if (!ISSET(tp->t_state, TS_TTSTOP | TS_TIMEOUT | TS_BUSY)) { 583 if (tp->t_outq.c_cc <= tp->t_lowat) { 584 if (ISSET(tp->t_state, TS_ASLEEP)) { 585 CLR(tp->t_state, TS_ASLEEP); 586 wakeup(&tp->t_outq); 587 } 588 selwakeup(&tp->t_wsel); 589 590 if (tp->t_outq.c_cc == 0) 591 goto out; 592 } 593 SET(tp->t_state, TS_BUSY); 594 cy_enable_transmitter(sc, cy); 595 } 596 out: 597 598 splx(s); 599 } 600 601 /* 602 * stop output 603 */ 604 void 605 cystop(tp, flag) 606 struct tty *tp; 607 int flag; 608 { 609 int card = CY_CARD(tp->t_dev); 610 int port = CY_PORT(tp->t_dev); 611 struct cy_softc *sc = cy_cd.cd_devs[card]; 612 struct cy_port *cy = &sc->sc_ports[port]; 613 int s; 614 615 #ifdef CY_DEBUG 616 printf("%s: port %d stop tty 0x%x flag 0x%x\n", 617 sc->sc_dev.dv_xname, port, tp, flag); 618 #endif 619 620 s = spltty(); 621 622 if (ISSET(tp->t_state, TS_BUSY)) { 623 if (!ISSET(tp->t_state, TS_TTSTOP)) 624 SET(tp->t_state, TS_FLUSH); 625 626 /* 627 * the transmit interrupt routine will disable transmit when it 628 * notices that CY_F_STOP has been set. 629 */ 630 SET(cy->cy_flags, CY_F_STOP); 631 } 632 splx(s); 633 } 634 635 /* 636 * parameter setting routine. 637 * returns 0 if successfull, else returns error code 638 */ 639 static int 640 cyparam(tp, t) 641 struct tty *tp; 642 struct termios *t; 643 { 644 int card = CY_CARD(tp->t_dev); 645 int port = CY_PORT(tp->t_dev); 646 struct cy_softc *sc = cy_cd.cd_devs[card]; 647 struct cy_port *cy = &sc->sc_ports[port]; 648 int ibpr, obpr, i_clk_opt, o_clk_opt; 649 int s, opt; 650 651 #ifdef CY_DEBUG 652 printf("%s: port %d param tty 0x%x termios 0x%x\n", 653 sc->sc_dev.dv_xname, port, tp, t); 654 printf("ispeed %d ospeed %d\n", t->c_ispeed, t->c_ospeed); 655 #endif 656 657 if (t->c_ospeed != 0 && cy_speed(t->c_ospeed, &o_clk_opt, &obpr) < 0) 658 return EINVAL; 659 660 if (t->c_ispeed != 0 && cy_speed(t->c_ispeed, &i_clk_opt, &ibpr) < 0) 661 return EINVAL; 662 663 s = spltty(); 664 665 /* hang up the line is ospeed is zero, else turn DTR on */ 666 cy_modem_control(sc, cy, TIOCM_DTR, (t->c_ospeed == 0 ? DMBIC : DMBIS)); 667 668 /* channel was selected by the above call to cy_modem_control() */ 669 #if 0 670 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, port & CD1400_CAR_CHAN); 671 #endif 672 673 /* set transmit speed */ 674 if (t->c_ospeed != 0) { 675 cd_write_reg(sc, cy->cy_chip, CD1400_TCOR, o_clk_opt); 676 cd_write_reg(sc, cy->cy_chip, CD1400_TBPR, obpr); 677 } 678 /* set receive speed */ 679 if (t->c_ispeed != 0) { 680 cd_write_reg(sc, cy->cy_chip, CD1400_RCOR, i_clk_opt); 681 cd_write_reg(sc, cy->cy_chip, CD1400_RBPR, ibpr); 682 } 683 opt = CD1400_CCR_CMDCHANCTL | CD1400_CCR_XMTEN 684 | (ISSET(t->c_cflag, CREAD) ? CD1400_CCR_RCVEN : CD1400_CCR_RCVDIS); 685 686 if (opt != cy->cy_channel_control) { 687 cy->cy_channel_control = opt; 688 cd1400_channel_cmd(sc, cy, opt); 689 } 690 /* compute COR1 contents */ 691 opt = 0; 692 if (ISSET(t->c_cflag, PARENB)) { 693 if (ISSET(t->c_cflag, PARODD)) 694 opt |= CD1400_COR1_PARODD; 695 opt |= CD1400_COR1_PARNORMAL; 696 } 697 if (!ISSET(t->c_iflag, INPCK)) 698 opt |= CD1400_COR1_NOINPCK; /* no parity checking */ 699 700 if (ISSET(t->c_cflag, CSTOPB)) 701 opt |= CD1400_COR1_STOP2; 702 703 switch (t->c_cflag & CSIZE) { 704 case CS5: 705 opt |= CD1400_COR1_CS5; 706 break; 707 708 case CS6: 709 opt |= CD1400_COR1_CS6; 710 break; 711 712 case CS7: 713 opt |= CD1400_COR1_CS7; 714 break; 715 716 default: 717 opt |= CD1400_COR1_CS8; 718 break; 719 } 720 721 cd_write_reg(sc, cy->cy_chip, CD1400_COR1, opt); 722 723 #ifdef CY_DEBUG 724 printf("cor1 = 0x%x...", opt); 725 #endif 726 727 /* 728 * use the CD1400 automatic CTS flow control if CRTSCTS is set 729 * 730 * CD1400_COR2_ETC is used because breaks are generated with 731 * embedded transmit commands 732 */ 733 cd_write_reg(sc, cy->cy_chip, CD1400_COR2, 734 CD1400_COR2_ETC | 735 (ISSET(t->c_cflag, CRTSCTS) ? CD1400_COR2_CCTS_OFLOW : 0)); 736 737 cd_write_reg(sc, cy->cy_chip, CD1400_COR3, CY_RX_FIFO_THRESHOLD); 738 739 cd1400_channel_cmd(sc, cy, CD1400_CCR_CMDCORCHG | 740 CD1400_CCR_COR1 | CD1400_CCR_COR2 | CD1400_CCR_COR3); 741 742 cd_write_reg(sc, cy->cy_chip, CD1400_COR4, CD1400_COR4_PFO_EXCEPTION); 743 cd_write_reg(sc, cy->cy_chip, CD1400_COR5, 0); 744 745 /* 746 * set modem change option registers to generate interrupts 747 * on carrier detect changes. 748 * 749 * if hardware RTS handshaking is used (CY_HW_RTS, DTR and RTS lines 750 * exchanged), also set the handshaking threshold. 751 */ 752 #ifdef CY_HW_RTS 753 cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd | 754 (ISSET(t->c_cflag, CRTSCTS) ? RX_DTR_THRESHOLD : 0)); 755 #else 756 cd_write_reg(sc, cy->cy_chip, CD1400_MCOR1, CD1400_MCOR1_CDzd); 757 #endif /* CY_HW_RTS */ 758 759 cd_write_reg(sc, cy->cy_chip, CD1400_MCOR2, CD1400_MCOR2_CDod); 760 761 /* 762 * set receive timeout to approx. 2ms 763 * could use more complex logic here... 764 * (but is it actually needed or even useful?) 765 */ 766 cd_write_reg(sc, cy->cy_chip, CD1400_RTPR, 2); 767 768 /* 769 * should do anything else here? 770 * XXX check MDMBUF handshaking like in com.c? 771 */ 772 773 splx(s); 774 return 0; 775 } 776 777 /* 778 * set/get modem line status 779 * 780 * bits can be: TIOCM_DTR, TIOCM_RTS, TIOCM_CTS, TIOCM_CD, TIOCM_RI, TIOCM_DSR 781 * 782 * RTS and DTR are exchanged if CY_HW_RTS is set 783 * 784 */ 785 static int 786 cy_modem_control(sc, cy, bits, howto) 787 struct cy_softc *sc; 788 struct cy_port *cy; 789 int bits; 790 int howto; 791 { 792 int s, msvr; 793 struct tty *tp = cy->cy_tty; 794 795 s = spltty(); 796 797 /* select channel */ 798 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 799 cy->cy_port_num & CD1400_CAR_CHAN); 800 801 /* does not manipulate RTS if it is used for flow control */ 802 switch (howto) { 803 case DMGET: 804 splx(s); 805 bits = 0; 806 if (cy->cy_channel_control & CD1400_CCR_RCVEN) 807 bits |= TIOCM_LE; 808 msvr = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); 809 #ifdef CY_HW_RTS 810 if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & 811 CD1400_MSVR1_RTS) 812 bits |= TIOCM_DTR; 813 if (msvr & CD1400_MSVR2_DTR) 814 bits |= TIOCM_RTS; 815 #else 816 if (cd_read_reg(sc, cy->cy_chip, CD1400_MSVR1) & 817 CD1400_MSVR1_RTS) 818 bits |= TIOCM_RTS; 819 if (msvr & CD1400_MSVR2_DTR) 820 bits |= TIOCM_DTR; 821 #endif /* CY_HW_RTS */ 822 if (msvr & CD1400_MSVR2_CTS) 823 bits |= TIOCM_CTS; 824 if (msvr & CD1400_MSVR2_CD) 825 bits |= TIOCM_CD; 826 if (msvr & CD1400_MSVR2_DSR) /* not connected on some 827 * Cyclom cards? */ 828 bits |= TIOCM_DSR; 829 if (msvr & CD1400_MSVR2_RI) /* not connected on Cyclom-8Y 830 * cards? */ 831 bits |= TIOCM_RI; 832 splx(s); 833 return bits; 834 835 case DMSET: /* replace old values with new ones */ 836 #ifdef CY_HW_RTS 837 if (!ISSET(tp->>t_cflag, CRTSCTS)) 838 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 839 ((bits & TIOCM_RTS) ? CD1400_MSVR2_DTR : 0)); 840 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 841 ((bits & TIOCM_DTR) ? CD1400_MSVR1_RTS : 0)); 842 #else 843 if (!ISSET(tp->t_cflag, CRTSCTS)) 844 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 845 ((bits & TIOCM_RTS) ? CD1400_MSVR1_RTS : 0)); 846 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 847 ((bits & TIOCM_DTR) ? CD1400_MSVR2_DTR : 0)); 848 #endif /* CY_HW_RTS */ 849 break; 850 851 case DMBIS: /* set bits */ 852 #ifdef CY_HW_RTS 853 if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0) 854 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 855 CD1400_MSVR2_DTR); 856 if (bits & TIOCM_DTR) 857 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 858 CD1400_MSVR1_RTS); 859 #else 860 if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS) != 0) 861 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 862 CD1400_MSVR1_RTS); 863 if (bits & TIOCM_DTR) 864 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 865 CD1400_MSVR2_DTR); 866 #endif /* CY_HW_RTS */ 867 break; 868 869 case DMBIC: /* clear bits */ 870 #ifdef CY_HW_RTS 871 if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) 872 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0); 873 if (bits & TIOCM_DTR) 874 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); 875 #else 876 if (!ISSET(tp->t_cflag, CRTSCTS) && (bits & TIOCM_RTS)) 877 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); 878 if (bits & TIOCM_DTR) 879 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR2, 0); 880 #endif /* CY_HW_RTS */ 881 break; 882 } 883 splx(s); 884 return 0; 885 } 886 887 /* 888 * Upper-level handler loop (called from timer interrupt?) 889 * This routine is common for multiple cards 890 */ 891 static void 892 cy_poll(arg) 893 void *arg; 894 { 895 int card, port; 896 struct cy_softc *sc; 897 struct cy_port *cy; 898 struct tty *tp; 899 static int counter = 0; 900 #ifdef CY_DEBUG1 901 int did_something; 902 #endif 903 int s = spltty(); 904 905 if (cy_events == 0 && ++counter < 200) { 906 splx(s); 907 goto out; 908 } 909 cy_events = 0; 910 splx(s); 911 912 for (card = 0; card < cy_cd.cd_ndevs; card++) { 913 sc = cy_cd.cd_devs[card]; 914 if (sc == NULL) 915 continue; 916 917 #ifdef CY_DEBUG1 918 sc->sc_poll_count1++; 919 did_something = 0; 920 #endif 921 922 for (port = 0; port < sc->sc_nchips * CD1400_NO_OF_CHANNELS; 923 port++) { 924 cy = &sc->sc_ports[port]; 925 if ((tp = cy->cy_tty) == NULL || cy->cy_ibuf == NULL || 926 !ISSET(tp->t_state, TS_ISOPEN | TS_WOPEN)) 927 continue; 928 929 /* 930 * handle received data 931 */ 932 while (cy->cy_ibuf_rd_ptr != cy->cy_ibuf_wr_ptr) { 933 u_char line_stat; 934 int chr; 935 936 line_stat = cy->cy_ibuf_rd_ptr[0]; 937 chr = cy->cy_ibuf_rd_ptr[1]; 938 939 if (line_stat & 940 (CD1400_RDSR_BREAK | CD1400_RDSR_FE)) 941 chr |= TTY_FE; 942 if (line_stat & CD1400_RDSR_PE) 943 chr |= TTY_PE; 944 945 /* 946 * on an overrun error the data is treated as 947 * good just as it should be. 948 */ 949 950 #ifdef CY_DEBUG 951 printf("%s: port %d ttyinput 0x%x\n", 952 sc->sc_dev.dv_xname, port, chr); 953 #endif 954 955 (*linesw[tp->t_line].l_rint) (chr, tp); 956 957 s = spltty(); /* really necessary? */ 958 if ((cy->cy_ibuf_rd_ptr += 2) == 959 cy->cy_ibuf_end) 960 cy->cy_ibuf_rd_ptr = cy->cy_ibuf; 961 splx(s); 962 963 #ifdef CY_DEBUG1 964 did_something = 1; 965 #endif 966 } 967 968 #ifndef CY_HW_RTS 969 /* 970 * If we don't have any received data in ibuf and 971 * CRTSCTS is on and RTS is turned off, it is time to 972 * turn RTS back on 973 */ 974 if (ISSET(tp->t_cflag, CRTSCTS)) { 975 /* 976 * we can't use cy_modem_control() here as it 977 * doesn't change RTS if RTSCTS is on 978 */ 979 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 980 port & CD1400_CAR_CHAN); 981 982 if ((cd_read_reg(sc, cy->cy_chip, 983 CD1400_MSVR1) & CD1400_MSVR1_RTS) == 0) { 984 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 985 CD1400_MSVR1_RTS); 986 #ifdef CY_DEBUG1 987 did_something = 1; 988 #endif 989 } 990 } 991 #endif /* CY_HW_RTS */ 992 993 /* 994 * handle carrier changes 995 */ 996 s = spltty(); 997 if (ISSET(cy->cy_flags, CY_F_CARRIER_CHANGED)) { 998 int carrier; 999 1000 CLR(cy->cy_flags, CY_F_CARRIER_CHANGED); 1001 splx(s); 1002 1003 carrier = ((cy->cy_carrier_stat & 1004 CD1400_MSVR2_CD) != 0); 1005 1006 #ifdef CY_DEBUG 1007 printf("cy_poll: carrier change " 1008 "(card %d, port %d, carrier %d)\n", 1009 card, port, carrier); 1010 #endif 1011 if (CY_DIALIN(tp->t_dev) && 1012 !(*linesw[tp->t_line].l_modem)(tp, carrier)) 1013 cy_modem_control(sc, cy, 1014 TIOCM_DTR, DMBIC); 1015 1016 #ifdef CY_DEBUG1 1017 did_something = 1; 1018 #endif 1019 } else 1020 splx(s); 1021 1022 s = spltty(); 1023 if (ISSET(cy->cy_flags, CY_F_START)) { 1024 CLR(cy->cy_flags, CY_F_START); 1025 splx(s); 1026 1027 (*linesw[tp->t_line].l_start) (tp); 1028 1029 #ifdef CY_DEBUG1 1030 did_something = 1; 1031 #endif 1032 } else 1033 splx(s); 1034 1035 /* could move this to even upper level... */ 1036 if (cy->cy_fifo_overruns) { 1037 cy->cy_fifo_overruns = 0; 1038 /* 1039 * doesn't report overrun count, but 1040 * shouldn't really matter 1041 */ 1042 log(LOG_WARNING, "%s: port %d fifo overrun\n", 1043 sc->sc_dev.dv_xname, port); 1044 } 1045 if (cy->cy_ibuf_overruns) { 1046 cy->cy_ibuf_overruns = 0; 1047 log(LOG_WARNING, "%s: port %d ibuf overrun\n", 1048 sc->sc_dev.dv_xname, port); 1049 } 1050 } /* for(port...) */ 1051 #ifdef CY_DEBUG1 1052 if (did_something && counter >= 200) 1053 sc->sc_poll_count2++; 1054 #endif 1055 } /* for(card...) */ 1056 1057 counter = 0; 1058 1059 out: 1060 timeout(cy_poll, NULL, 1); 1061 } 1062 1063 /* 1064 * hardware interrupt routine 1065 */ 1066 int 1067 cy_intr(arg) 1068 void *arg; 1069 { 1070 struct cy_softc *sc = arg; 1071 struct cy_port *cy; 1072 int cy_chip, stat; 1073 int int_serviced = 0; 1074 1075 /* 1076 * Check interrupt status of each CD1400 chip on this card 1077 * (multiple cards cannot share the same interrupt) 1078 */ 1079 for (cy_chip = 0; cy_chip < sc->sc_nchips; cy_chip++) { 1080 1081 stat = cd_read_reg(sc, cy_chip, CD1400_SVRR); 1082 if (stat == 0) 1083 continue; 1084 1085 if (ISSET(stat, CD1400_SVRR_RXRDY)) { 1086 u_char save_car, save_rir, serv_type; 1087 u_char line_stat, recv_data, n_chars; 1088 u_char *buf_p; 1089 1090 save_rir = cd_read_reg(sc, cy_chip, CD1400_RIR); 1091 save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); 1092 /* enter rx service */ 1093 cd_write_reg(sc, cy_chip, CD1400_CAR, save_rir); 1094 1095 serv_type = cd_read_reg(sc, cy_chip, CD1400_RIVR); 1096 cy = &sc->sc_ports[serv_type >> 3]; 1097 1098 #ifdef CY_DEBUG1 1099 cy->cy_rx_int_count++; 1100 #endif 1101 1102 if (cy->cy_tty == NULL || 1103 !ISSET(cy->cy_tty->t_state, TS_ISOPEN)) 1104 goto end_rx_serv; 1105 1106 buf_p = cy->cy_ibuf_wr_ptr; 1107 1108 if (ISSET(serv_type, CD1400_RIVR_EXCEPTION)) { 1109 line_stat = cd_read_reg(sc, cy->cy_chip, 1110 CD1400_RDSR); 1111 recv_data = cd_read_reg(sc, cy->cy_chip, 1112 CD1400_RDSR); 1113 1114 #ifdef CY_DEBUG 1115 printf("cy%d port %d recv exception, line_stat 0x%x, char 0x%x\n", 1116 card, cy->cy_port_num, line_stat, recv_data); 1117 #endif 1118 if (ISSET(line_stat, CD1400_RDSR_OE)) 1119 cy->cy_fifo_overruns++; 1120 1121 *buf_p++ = line_stat; 1122 *buf_p++ = recv_data; 1123 if (buf_p == cy->cy_ibuf_end) 1124 buf_p = cy->cy_ibuf; 1125 1126 if (buf_p == cy->cy_ibuf_rd_ptr) { 1127 if (buf_p == cy->cy_ibuf) 1128 buf_p = cy->cy_ibuf_end; 1129 buf_p -= 2; 1130 cy->cy_ibuf_overruns++; 1131 } 1132 cy_events = 1; 1133 } else {/* no exception, received data OK */ 1134 n_chars = cd_read_reg(sc, cy->cy_chip, 1135 CD1400_RDCR); 1136 #ifdef CY_DEBUG 1137 printf("cy%d port %d receive ok %d chars\n", 1138 card, cy->cy_port_num, n_chars); 1139 #endif 1140 while (n_chars--) { 1141 *buf_p++ = 0; /* status: OK */ 1142 /* data byte */ 1143 *buf_p++ = cd_read_reg(sc, 1144 cy->cy_chip, CD1400_RDSR); 1145 if (buf_p == cy->cy_ibuf_end) 1146 buf_p = cy->cy_ibuf; 1147 if (buf_p == cy->cy_ibuf_rd_ptr) { 1148 if (buf_p == cy->cy_ibuf) 1149 buf_p = cy->cy_ibuf_end; 1150 buf_p -= 2; 1151 cy->cy_ibuf_overruns++; 1152 break; 1153 } 1154 } 1155 cy_events = 1; 1156 } 1157 1158 cy->cy_ibuf_wr_ptr = buf_p; 1159 1160 #ifndef CY_HW_RTS 1161 /* RTS handshaking for incoming data */ 1162 if (ISSET(cy->cy_tty->t_cflag, CRTSCTS)) { 1163 int bf; 1164 1165 bf = buf_p - cy->cy_ibuf_rd_ptr; 1166 if (bf < 0) 1167 bf += CY_IBUF_SIZE; 1168 1169 if (bf > (CY_IBUF_SIZE / 2)) /* turn RTS off */ 1170 cd_write_reg(sc, cy->cy_chip, CD1400_MSVR1, 0); 1171 } 1172 #endif /* CY_HW_RTS */ 1173 1174 end_rx_serv: 1175 /* terminate service context */ 1176 cd_write_reg(sc, cy->cy_chip, CD1400_RIR, save_rir & 0x3f); 1177 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car); 1178 int_serviced = 1; 1179 } /* if(rx_service...) */ 1180 if (ISSET(stat, CD1400_SVRR_MDMCH)) { 1181 u_char save_car, save_mir, serv_type, modem_stat; 1182 1183 save_mir = cd_read_reg(sc, cy_chip, CD1400_MIR); 1184 save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); 1185 /* enter modem service */ 1186 cd_write_reg(sc, cy_chip, CD1400_CAR, save_mir); 1187 1188 serv_type = cd_read_reg(sc, cy_chip, CD1400_MIVR); 1189 cy = &sc->sc_ports[serv_type >> 3]; 1190 1191 #ifdef CY_DEBUG1 1192 cy->cy_modem_int_count++; 1193 #endif 1194 1195 modem_stat = cd_read_reg(sc, cy->cy_chip, CD1400_MSVR2); 1196 1197 #ifdef CY_DEBUG 1198 printf("cy%d port %d modem line change, new stat 0x%x\n", 1199 card, cy->cy_port_num, modem_stat); 1200 #endif 1201 if (ISSET((cy->cy_carrier_stat ^ modem_stat), CD1400_MSVR2_CD)) { 1202 SET(cy->cy_flags, CY_F_CARRIER_CHANGED); 1203 cy_events = 1; 1204 } 1205 cy->cy_carrier_stat = modem_stat; 1206 1207 /* terminate service context */ 1208 cd_write_reg(sc, cy->cy_chip, CD1400_MIR, save_mir & 0x3f); 1209 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car); 1210 int_serviced = 1; 1211 } /* if(modem_service...) */ 1212 if (ISSET(stat, CD1400_SVRR_TXRDY)) { 1213 u_char save_car, save_tir, serv_type, 1214 count, ch; 1215 struct tty *tp; 1216 1217 save_tir = cd_read_reg(sc, cy_chip, CD1400_TIR); 1218 save_car = cd_read_reg(sc, cy_chip, CD1400_CAR); 1219 /* enter tx service */ 1220 cd_write_reg(sc, cy_chip, CD1400_CAR, save_tir); 1221 1222 serv_type = cd_read_reg(sc, cy_chip, CD1400_TIVR); 1223 cy = &sc->sc_ports[serv_type >> 3]; 1224 1225 #ifdef CY_DEBUG1 1226 cy->cy_tx_int_count++; 1227 #endif 1228 #ifdef CY_DEBUG 1229 printf("cy%d port %d tx service\n", card, 1230 cy->cy_port_num); 1231 #endif 1232 1233 /* stop transmitting if no tty or CY_F_STOP set */ 1234 tp = cy->cy_tty; 1235 if (tp == NULL || ISSET(cy->cy_flags, CY_F_STOP)) 1236 goto txdone; 1237 1238 count = 0; 1239 if (ISSET(cy->cy_flags, CY_F_SEND_NUL)) { 1240 cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); 1241 cd_write_reg(sc, cy->cy_chip, CD1400_TDR, 0); 1242 count += 2; 1243 CLR(cy->cy_flags, CY_F_SEND_NUL); 1244 } 1245 if (tp->t_outq.c_cc > 0) { 1246 SET(tp->t_state, TS_BUSY); 1247 while (tp->t_outq.c_cc > 0 && 1248 count < CD1400_TX_FIFO_SIZE) { 1249 ch = getc(&tp->t_outq); 1250 /* 1251 * remember to double NUL characters 1252 * because embedded transmit commands 1253 * are enabled 1254 */ 1255 if (ch == 0) { 1256 if (count >= CD1400_TX_FIFO_SIZE - 2) { 1257 SET(cy->cy_flags, CY_F_SEND_NUL); 1258 break; 1259 } 1260 cd_write_reg(sc, cy->cy_chip, 1261 CD1400_TDR, ch); 1262 count++; 1263 } 1264 cd_write_reg(sc, cy->cy_chip, 1265 CD1400_TDR, ch); 1266 count++; 1267 } 1268 } else { 1269 /* 1270 * no data to send -- check if we should 1271 * start/stop a break 1272 */ 1273 /* 1274 * XXX does this cause too much delay before 1275 * breaks? 1276 */ 1277 if (ISSET(cy->cy_flags, CY_F_START_BREAK)) { 1278 cd_write_reg(sc, cy->cy_chip, 1279 CD1400_TDR, 0); 1280 cd_write_reg(sc, cy->cy_chip, 1281 CD1400_TDR, 0x81); 1282 CLR(cy->cy_flags, CY_F_START_BREAK); 1283 } 1284 if (ISSET(cy->cy_flags, CY_F_END_BREAK)) { 1285 cd_write_reg(sc, cy->cy_chip, 1286 CD1400_TDR, 0); 1287 cd_write_reg(sc, cy->cy_chip, 1288 CD1400_TDR, 0x83); 1289 CLR(cy->cy_flags, CY_F_END_BREAK); 1290 } 1291 } 1292 1293 if (tp->t_outq.c_cc == 0) { 1294 txdone: 1295 /* 1296 * No data to send or requested to stop. 1297 * Disable transmit interrupt 1298 */ 1299 cd_write_reg(sc, cy->cy_chip, CD1400_SRER, 1300 cd_read_reg(sc, cy->cy_chip, CD1400_SRER) 1301 & ~CD1400_SRER_TXRDY); 1302 CLR(cy->cy_flags, CY_F_STOP); 1303 CLR(tp->t_state, TS_BUSY); 1304 } 1305 if (tp->t_outq.c_cc <= tp->t_lowat) { 1306 SET(cy->cy_flags, CY_F_START); 1307 cy_events = 1; 1308 } 1309 /* terminate service context */ 1310 cd_write_reg(sc, cy->cy_chip, CD1400_TIR, save_tir & 0x3f); 1311 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, save_car); 1312 int_serviced = 1; 1313 } /* if(tx_service...) */ 1314 } /* for(...all CD1400s on a card) */ 1315 1316 /* ensure an edge for next interrupt */ 1317 bus_mem_write_1(sc->sc_bc, sc->sc_memh, 1318 CY_CLEAR_INTR << sc->sc_bustype, 0); 1319 return int_serviced; 1320 } 1321 1322 /* 1323 * subroutine to enable CD1400 transmitter 1324 */ 1325 static void 1326 cy_enable_transmitter(sc, cy) 1327 struct cy_softc *sc; 1328 struct cy_port *cy; 1329 { 1330 int s = spltty(); 1331 cd_write_reg(sc, cy->cy_chip, CD1400_CAR, 1332 cy->cy_port_num & CD1400_CAR_CHAN); 1333 cd_write_reg(sc, cy->cy_chip, CD1400_SRER, 1334 cd_read_reg(sc, cy->cy_chip, CD1400_SRER) | CD1400_SRER_TXRDY); 1335 splx(s); 1336 } 1337 1338 /* 1339 * Execute a CD1400 channel command 1340 */ 1341 static void 1342 cd1400_channel_cmd(sc, cy, cmd) 1343 struct cy_softc *sc; 1344 struct cy_port *cy; 1345 int cmd; 1346 { 1347 u_int waitcnt = 5 * 8 * 1024; /* approx 5 ms */ 1348 1349 #ifdef CY_DEBUG 1350 printf("c1400_channel_cmd cy 0x%x command 0x%x\n", cy, cmd); 1351 #endif 1352 1353 /* wait until cd1400 is ready to process a new command */ 1354 while (cd_read_reg(sc, cy->cy_chip, CD1400_CCR) != 0 && waitcnt-- > 0); 1355 1356 if (waitcnt == 0) 1357 log(LOG_ERR, "%s: channel command timeout\n", 1358 sc->sc_dev.dv_xname); 1359 1360 cd_write_reg(sc, cy->cy_chip, CD1400_CCR, cmd); 1361 } 1362 1363 /* 1364 * Compute clock option register and baud rate register values 1365 * for a given speed. Return 0 on success, -1 on failure. 1366 * 1367 * The error between requested and actual speed seems 1368 * to be well within allowed limits (less than 3%) 1369 * with every speed value between 50 and 150000 bps. 1370 */ 1371 static int 1372 cy_speed(speed, cor, bpr) 1373 speed_t speed; 1374 int *cor, *bpr; 1375 { 1376 int c, co, br; 1377 1378 if (speed < 50 || speed > 150000) 1379 return -1; 1380 1381 for (c = 0, co = 8; co <= 2048; co <<= 2, c++) { 1382 br = (CY_CLOCK + (co * speed) / 2) / (co * speed); 1383 if (br < 0x100) { 1384 *bpr = br; 1385 *cor = c; 1386 return 0; 1387 } 1388 } 1389 1390 return -1; 1391 } 1392
Indexes created Mon Sep 22 10:09:38 GMT 2025