cd18xx.c revision 1.2
1 /* $NetBSD: cd18xx.c,v 1.2 2001/11/13 13:14:35 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2001 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /*- 32 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 33 * All rights reserved. 34 * 35 * This code is derived from software contributed to The NetBSD Foundation 36 * by Charles M. Hannum. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the NetBSD 49 * Foundation, Inc. and its contributors. 50 * 4. Neither the name of The NetBSD Foundation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 55 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 56 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 57 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 58 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 59 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 60 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 61 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 62 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 63 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 64 * POSSIBILITY OF SUCH DAMAGE. 65 */ 66 67 /* 68 * Copyright (c) 1991 The Regents of the University of California. 69 * All rights reserved. 70 * 71 * Redistribution and use in source and binary forms, with or without 72 * modification, are permitted provided that the following conditions 73 * are met: 74 * 1. Redistributions of source code must retain the above copyright 75 * notice, this list of conditions and the following disclaimer. 76 * 2. Redistributions in binary form must reproduce the above copyright 77 * notice, this list of conditions and the following disclaimer in the 78 * documentation and/or other materials provided with the distribution. 79 * 3. All advertising materials mentioning features or use of this software 80 * must display the following acknowledgement: 81 * This product includes software developed by the University of 82 * California, Berkeley and its contributors. 83 * 4. Neither the name of the University nor the names of its contributors 84 * may be used to endorse or promote products derived from this software 85 * without specific prior written permission. 86 * 87 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 88 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 89 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 90 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 91 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 92 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 93 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 94 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 95 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 96 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 97 * SUCH DAMAGE. 98 * 99 * @(#)com.c 7.5 (Berkeley) 5/16/91 100 */ 101 102 /* 103 * cirrus logic CL-CD180/CD1864/CD1865 driver, based in (large) parts on 104 * the com and z8530 drivers. thanks charles. 105 */ 106 107 #include <sys/cdefs.h> 108 __KERNEL_RCSID(0, "$NetBSD: cd18xx.c,v 1.2 2001/11/13 13:14:35 lukem Exp $"); 109 110 #include <sys/param.h> 111 #include <sys/conf.h> 112 #include <sys/device.h> 113 #include <sys/systm.h> 114 #include <sys/malloc.h> 115 #include <sys/proc.h> 116 #include <sys/kernel.h> 117 #include <sys/tty.h> 118 #include <sys/fcntl.h> 119 120 #include <machine/bus.h> 121 122 #include <dev/ic/cd18xxvar.h> 123 #include <dev/ic/cd18xxreg.h> 124 125 #include "ioconf.h" 126 127 /* 128 * some helpers 129 */ 130 131 /* macros to clear/set/test flags. */ 132 #define SET(t, f) (t) |= (f) 133 #define CLR(t, f) (t) &= ~(f) 134 #define ISSET(t, f) ((t) & (f)) 135 136 static void cdtty_attach(struct cd18xx_softc *, int); 137 138 static __inline void cd18xx_rint(struct cd18xx_softc *, int *); 139 static __inline void cd18xx_tint(struct cd18xx_softc *, int *); 140 static __inline void cd18xx_mint(struct cd18xx_softc *, int *); 141 142 void cdtty_rxsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 143 void cdtty_txsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 144 void cdtty_stsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 145 void cd18xx_softintr(void *); 146 147 cdev_decl(cdtty); 148 149 static void cdtty_shutdown(struct cd18xx_softc *, struct cdtty_port*); 150 static void cdttystart(struct tty *); 151 static int cdttyparam(struct tty *, struct termios *); 152 static void cdtty_break(struct cd18xx_softc *, struct cdtty_port *, int); 153 static void cdtty_modem(struct cd18xx_softc *, struct cdtty_port *, int); 154 static int cdttyhwiflow(struct tty *, int); 155 static void cdtty_hwiflow(struct cd18xx_softc *, struct cdtty_port *); 156 157 static void cdtty_loadchannelregs(struct cd18xx_softc *, 158 struct cdtty_port *); 159 160 /* default read buffer size */ 161 u_int cdtty_rbuf_size = CDTTY_RING_SIZE; 162 163 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 164 u_int cdtty_rbuf_hiwat = (CDTTY_RING_SIZE * 1) / 4; 165 u_int cdtty_rbuf_lowat = (CDTTY_RING_SIZE * 3) / 4; 166 167 #define CD18XXDEBUG 168 #ifdef CD18XXDEBUG 169 #define CDD_INFO 0x0001 170 #define CDD_INTR 0x0002 171 int cd18xx_debug = CDD_INTR|CDD_INFO; 172 # define DPRINTF(l, x) if (cd18xx_debug & l) printf x 173 #else 174 # define DPRINTF(l, x) /* nothing */ 175 #endif 176 177 /* Known supported revisions. */ 178 struct cd18xx_revs { 179 u_char revision; 180 u_char onehundred_pin; 181 char *name; 182 } cd18xx_revs[] = { 183 { CD180_GFRCR_REV_B, 0, "CL-CD180 rev. B" }, 184 { CD180_GFRCR_REV_C, 0, "CL-CD180 rev. C" }, 185 { CD1864_GFRCR_REVISION_A, 1, "CL-CD1864 rev. A" }, 186 { CD1865_GFRCR_REVISION_A, 1, "CL-CD1865 rev. A" }, 187 { CD1865_GFRCR_REVISION_B, 1, "CL-CD1865 rev. B" }, 188 { CD1865_GFRCR_REVISION_C, 1, "CL-CD1865 rev. C" }, 189 { 0, 0, 0 } 190 }; 191 192 /* wait for the CCR to go to zero */ 193 static __inline int cd18xx_wait_ccr(struct cd18xx_softc *); 194 static __inline int 195 cd18xx_wait_ccr(sc) 196 struct cd18xx_softc *sc; 197 { 198 int i = 100000; 199 200 while (--i && 201 bus_space_read_1(sc->sc_tag, sc->sc_handle, CD18xx_CCR) == 0) 202 break; 203 return (i == 0); 204 } 205 206 /* 207 * device attach routine, high-end portion 208 */ 209 void 210 cd18xx_attach(sc) 211 struct cd18xx_softc *sc; 212 { 213 static int chip_id_next = 1; 214 int onehundred_pin, revision, i, port; 215 216 /* read and print the revision */ 217 revision = cd18xx_read(sc, CD18xx_GFRCR); 218 onehundred_pin = ISSET(cd18xx_read(sc, CD18xx_SRCR),CD18xx_SRCR_PKGTYP); 219 for (i = 0; cd18xx_revs[i].name; i++) 220 if (revision == cd18xx_revs[i].revision || 221 onehundred_pin == cd18xx_revs[i].onehundred_pin) { 222 printf(": %s", cd18xx_revs[i].name); 223 break; 224 } 225 226 if (cd18xx_revs[i].name == NULL) { 227 printf("%s: unknown revision, bailing.\n", sc->sc_dev.dv_xname); 228 return; 229 } 230 231 /* prepare for reset */ 232 cd18xx_set_car(sc, 0); 233 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_CLEAR); 234 235 /* wait for CCR to go to zero */ 236 if (cd18xx_wait_ccr(sc)) { 237 printf("cd18xx_attach: reset change command timed out\n"); 238 return; 239 } 240 241 /* full reset of all channels */ 242 cd18xx_write(sc, CD18xx_CCR, 243 CD18xx_CCR_RESET|CD18xx_CCR_RESET_HARD); 244 245 /* loop until the GSVR is ready */ 246 i = 100000; 247 while (--i && cd18xx_read(sc, CD18xx_GSVR) == CD18xx_GSVR_READY) 248 ; 249 if (i == 0) { 250 printf("\n%s: did not reset!\n", sc->sc_dev.dv_xname); 251 return; 252 } 253 254 /* write the chip_id */ 255 sc->sc_chip_id = chip_id_next++; 256 #ifdef DIAGNOSTIC 257 if (sc->sc_chip_id > 31) 258 panic("more than 31 cd18xx's? help."); 259 #endif 260 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_SETID(sc)); 261 262 /* rx/tx/modem service match vectors, initalised by higher level */ 263 cd18xx_write(sc, CD18xx_MSMR, sc->sc_msmr | 0x80); 264 cd18xx_write(sc, CD18xx_TSMR, sc->sc_tsmr | 0x80); 265 cd18xx_write(sc, CD18xx_RSMR, sc->sc_rsmr | 0x80); 266 267 printf(", gsvr %x msmr %x tsmr %x rsmr %x", 268 cd18xx_read(sc, CD18xx_GSVR), 269 cd18xx_read(sc, CD18xx_MSMR), 270 cd18xx_read(sc, CD18xx_TSMR), 271 cd18xx_read(sc, CD18xx_RSMR)); 272 273 /* prescale registers */ 274 sc->sc_pprh = 0xf0; 275 sc->sc_pprl = 0; 276 cd18xx_write(sc, CD18xx_PPRH, sc->sc_pprh); 277 cd18xx_write(sc, CD18xx_PPRL, sc->sc_pprl); 278 279 /* establish our soft interrupt. */ 280 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, cd18xx_softintr, sc); 281 282 printf(", 8 ports ready (chip id %d)\n", sc->sc_chip_id); 283 284 /* 285 * finally, we loop over all 8 channels initialising them 286 */ 287 for (port = 0; port < 8; port++) 288 cdtty_attach(sc, port); 289 } 290 291 /* tty portion of the code */ 292 293 /* 294 * tty portion attach routine 295 */ 296 void 297 cdtty_attach(sc, port) 298 struct cd18xx_softc *sc; 299 int port; 300 { 301 struct cdtty_port *p = &sc->sc_ports[port]; 302 int i; 303 304 /* load CAR with channel number */ 305 cd18xx_set_car(sc, port); 306 307 /* wait for CCR to go to zero */ 308 if (cd18xx_wait_ccr(sc)) { 309 printf("cd18xx_attach: change command timed out setting " 310 "CAR for port %d\n", i); 311 return; 312 } 313 314 /* set the RPTR to (arbitrary) 8 */ 315 cd18xx_write(sc, CD18xx_RTPR, 8); 316 317 /* reset the modem signal value register */ 318 sc->sc_ports[port].p_msvr = CD18xx_MSVR_RESET; 319 320 /* zero the service request enable register */ 321 cd18xx_write(sc, CD18xx_SRER, 0); 322 323 /* enable the transmitter & receiver */ 324 SET(p->p_chanctl, CD18xx_CCR_CHANCTL | 325 CD18xx_CCR_CHANCTL_TxEN | 326 CD18xx_CCR_CHANCTL_RxEN); 327 328 /* XXX no console or kgdb support yet! */ 329 330 /* get a tty structure */ 331 p->p_tty = ttymalloc(); 332 p->p_tty->t_oproc = cdttystart; 333 p->p_tty->t_param = cdttyparam; 334 p->p_tty->t_hwiflow = cdttyhwiflow; 335 336 p->p_rbuf = malloc(cdtty_rbuf_size << 1, M_DEVBUF, M_WAITOK); 337 p->p_rbput = p->p_rbget = p->p_rbuf; 338 p->p_rbavail = cdtty_rbuf_size; 339 if (p->p_rbuf == NULL) { 340 printf("%s: unable to allocate ring buffer for tty %d\n", 341 sc->sc_dev.dv_xname, port); 342 return; 343 } 344 p->p_ebuf = p->p_rbuf + (cdtty_rbuf_size << 1); 345 346 tty_attach(p->p_tty); 347 } 348 349 /* 350 * below here are the tty portion device routines. 351 */ 352 void 353 cdtty_shutdown(sc, p) 354 struct cd18xx_softc *sc; 355 struct cdtty_port *p; 356 { 357 struct tty *tp = p->p_tty; 358 int s; 359 360 s = splserial(); 361 362 /* If we were asserting flow control, then deassert it. */ 363 SET(p->p_rx_flags, RX_IBUF_BLOCKED); 364 cdtty_hwiflow(sc, p); 365 366 /* Clear any break condition set with TIOCSBRK. */ 367 cdtty_break(sc, p, 0); 368 369 /* 370 * Hang up if necessary. Wait a bit, so the other side has time to 371 * notice even if we immediately open the port again. 372 * Avoid tsleeping above splhigh(). 373 */ 374 if (ISSET(tp->t_cflag, HUPCL)) { 375 cdtty_modem(sc, p, 0); 376 splx(s); 377 /* XXX tsleep will only timeout */ 378 (void) tsleep(sc, TTIPRI, ttclos, hz); 379 s = splserial(); 380 } 381 382 /* Turn off interrupts. */ 383 p->p_srer = 0; 384 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 385 386 splx(s); 387 } 388 389 /* 390 * cdttyopen: open syscall for cdtty terminals.. 391 */ 392 int 393 cdttyopen(dev, flag, mode, p) 394 dev_t dev; 395 int flag; 396 int mode; 397 struct proc *p; 398 { 399 struct tty *tp; 400 struct cd18xx_softc *sc; 401 struct cdtty_port *port; 402 int channel, instance, s, error; 403 404 channel = CD18XX_CHANNEL(dev); 405 instance = CD18XX_INSTANCE(dev); 406 407 /* ensure instance is valid */ 408 if (instance >= clcd_cd.cd_ndevs) 409 return (ENXIO); 410 411 /* get softc and port */ 412 sc = clcd_cd.cd_devs[instance]; 413 if (sc == NULL) 414 return (ENXIO); 415 port = &sc->sc_ports[channel]; 416 if (port == NULL || port->p_rbuf == NULL) 417 return (ENXIO); 418 419 /* kgdb support? maybe later... */ 420 421 tp = port->p_tty; 422 423 /* enforce exclude */ 424 if (tp == NULL || 425 (ISSET(tp->t_state, TS_ISOPEN) && 426 ISSET(tp->t_state, TS_XCLUDE) && 427 (p->p_ucred->cr_uid != 0))) 428 return (EBUSY); 429 430 s = spltty(); 431 432 /* 433 * Do the following iff this is a first open. 434 */ 435 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 436 struct termios t; 437 438 /* set up things in tp as necessary */ 439 tp->t_dev = dev; 440 441 /* 442 * Initialize the termios status to the defaults. Add in the 443 * sticky bits from TIOCSFLAGS. 444 */ 445 t.c_ispeed = 0; 446 t.c_ospeed = TTYDEF_SPEED; 447 t.c_cflag = TTYDEF_CFLAG; 448 449 if (ISSET(port->p_swflags, TIOCFLAG_CLOCAL)) 450 SET(t.c_cflag, CLOCAL); 451 if (ISSET(port->p_swflags, TIOCFLAG_CRTSCTS)) 452 SET(t.c_cflag, CRTSCTS); 453 if (ISSET(port->p_swflags, TIOCFLAG_CDTRCTS)) 454 SET(t.c_cflag, CDTRCTS); 455 if (ISSET(port->p_swflags, TIOCFLAG_MDMBUF)) 456 SET(t.c_cflag, MDMBUF); 457 458 /* Make sure param will see changes. */ 459 tp->t_ospeed = 0; 460 (void)cdttyparam(tp, &t); 461 462 tp->t_iflag = TTYDEF_IFLAG; 463 tp->t_oflag = TTYDEF_OFLAG; 464 tp->t_lflag = TTYDEF_LFLAG; 465 ttychars(tp); 466 ttsetwater(tp); 467 468 (void)splserial(); 469 470 /* turn on rx and modem interrupts */ 471 cd18xx_set_car(sc, CD18XX_CHANNEL(dev)); 472 SET(port->p_srer, CD18xx_SRER_Rx | 473 CD18xx_SRER_RxSC | 474 CD18xx_SRER_CD); 475 cd18xx_write(sc, CD18xx_SRER, port->p_srer); 476 477 /* always turn on DTR when open */ 478 cdtty_modem(sc, port, 1); 479 480 /* initialise ring buffer */ 481 port->p_rbget = port->p_rbput = port->p_rbuf; 482 port->p_rbavail = cdtty_rbuf_size; 483 CLR(port->p_rx_flags, RX_ANY_BLOCK); 484 cdtty_hwiflow(sc, port); 485 } 486 487 /* drop spl back before going into the line open */ 488 splx(s); 489 490 error = ttyopen(tp, CD18XX_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 491 if (error == 0) 492 error = (*tp->t_linesw->l_open)(dev, tp); 493 494 return (error); 495 } 496 497 /* 498 * cdttyclose: close syscall for cdtty terminals.. 499 */ 500 int 501 cdttyclose(dev, flag, mode, p) 502 dev_t dev; 503 int flag; 504 int mode; 505 struct proc *p; 506 { 507 struct cd18xx_softc *sc; 508 struct cdtty_port *port; 509 struct tty *tp; 510 int channel, instance; 511 512 channel = CD18XX_CHANNEL(dev); 513 instance = CD18XX_INSTANCE(dev); 514 515 /* ensure instance is valid */ 516 if (instance >= clcd_cd.cd_ndevs) 517 return (ENXIO); 518 519 /* get softc and port */ 520 sc = clcd_cd.cd_devs[instance]; 521 if (sc == NULL) 522 return (ENXIO); 523 port = &sc->sc_ports[channel]; 524 525 tp = port->p_tty; 526 527 (*tp->t_linesw->l_close)(tp, flag); 528 ttyclose(tp); 529 530 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 531 /* 532 * Although we got a last close, the device may still be in 533 * use; e.g. if this was the dialout node, and there are still 534 * processes waiting for carrier on the non-dialout node. 535 */ 536 cdtty_shutdown(sc, port); 537 } 538 539 return (0); 540 } 541 542 /* 543 * cdttyread: read syscall for cdtty terminals.. 544 */ 545 int 546 cdttyread(dev, uio, flag) 547 dev_t dev; 548 struct uio *uio; 549 int flag; 550 { 551 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 552 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 553 struct tty *tp = port->p_tty; 554 555 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 556 } 557 558 /* 559 * cdttywrite: write syscall for cdtty terminals.. 560 */ 561 int 562 cdttywrite(dev, uio, flag) 563 dev_t dev; 564 struct uio *uio; 565 int flag; 566 { 567 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 568 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 569 struct tty *tp = port->p_tty; 570 571 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 572 } 573 574 int 575 cdttypoll(dev, events, p) 576 dev_t dev; 577 int events; 578 struct proc *p; 579 { 580 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 581 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 582 struct tty *tp = port->p_tty; 583 584 return ((*tp->t_linesw->l_poll)(tp, events, p)); 585 } 586 587 /* 588 * cdttytty: return a pointer to our (cdtty) tp. 589 */ 590 struct tty * 591 cdttytty(dev) 592 dev_t dev; 593 { 594 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 595 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 596 597 return (port->p_tty); 598 } 599 600 /* 601 * cdttyioctl: ioctl syscall for cdtty terminals.. 602 */ 603 int 604 cdttyioctl(dev, cmd, data, flag, p) 605 dev_t dev; 606 u_long cmd; 607 caddr_t data; 608 int flag; 609 struct proc *p; 610 { 611 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 612 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 613 struct tty *tp = port->p_tty; 614 int error, s; 615 616 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 617 if (error >= 0) 618 return (error); 619 620 error = ttioctl(tp, cmd, data, flag, p); 621 if (error >= 0) 622 return (error); 623 624 s = splserial(); 625 626 switch (cmd) { 627 case TIOCSBRK: 628 cdtty_break(sc, port, 1); 629 break; 630 631 case TIOCCBRK: 632 cdtty_break(sc, port, 0); 633 break; 634 635 case TIOCSDTR: 636 cdtty_modem(sc, port, 1); 637 break; 638 639 case TIOCCDTR: 640 cdtty_modem(sc, port, 0); 641 break; 642 643 case TIOCGFLAGS: 644 *(int *)data = port->p_swflags; 645 break; 646 647 case TIOCSFLAGS: 648 error = suser(p->p_ucred, &p->p_acflag); 649 if (error) 650 return (error); 651 port->p_swflags = *(int *)data; 652 break; 653 654 case TIOCMSET: 655 case TIOCMBIS: 656 case TIOCMBIC: 657 case TIOCMGET: 658 default: 659 return (ENOTTY); 660 } 661 662 splx(s); 663 return (0); 664 } 665 666 /* 667 * Start or restart transmission. 668 */ 669 static void 670 cdttystart(tp) 671 struct tty *tp; 672 { 673 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 674 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 675 int s; 676 677 s = spltty(); 678 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 679 goto out; 680 if (p->p_tx_stopped) 681 goto out; 682 683 if (tp->t_outq.c_cc <= tp->t_lowat) { 684 if (ISSET(tp->t_state, TS_ASLEEP)) { 685 CLR(tp->t_state, TS_ASLEEP); 686 wakeup((caddr_t)&tp->t_outq); 687 } 688 selwakeup(&tp->t_wsel); 689 if (tp->t_outq.c_cc == 0) 690 goto out; 691 } 692 693 /* Grab the first contiguous region of buffer space. */ 694 { 695 u_char *tba; 696 int tbc; 697 698 tba = tp->t_outq.c_cf; 699 tbc = ndqb(&tp->t_outq, 0); 700 701 (void)splserial(); 702 703 p->p_tba = tba; 704 p->p_tbc = tbc; 705 } 706 707 SET(tp->t_state, TS_BUSY); 708 p->p_tx_busy = 1; 709 710 /* turn on tx interrupts */ 711 if ((p->p_srer & CD18xx_SRER_Tx) == 0) { 712 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 713 SET(p->p_srer, CD18xx_SRER_Tx); 714 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 715 } 716 717 /* 718 * Now bail; we can't actually transmit bytes until we're in a 719 * transmit interrupt service routine. 720 */ 721 out: 722 splx(s); 723 return; 724 } 725 726 /* 727 * cdttystop: handing ^S or other stop signals, for a cdtty 728 */ 729 void 730 cdttystop(tp, flag) 731 struct tty *tp; 732 int flag; 733 { 734 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 735 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 736 int s; 737 738 s = splserial(); 739 if (ISSET(tp->t_state, TS_BUSY)) { 740 /* Stop transmitting at the next chunk. */ 741 p->p_tbc = 0; 742 p->p_heldtbc = 0; 743 if (!ISSET(tp->t_state, TS_TTSTOP)) 744 SET(tp->t_state, TS_FLUSH); 745 } 746 splx(s); 747 } 748 749 /* 750 * load a channel's registers. 751 */ 752 void 753 cdtty_loadchannelregs(sc, p) 754 struct cd18xx_softc *sc; 755 struct cdtty_port *p; 756 { 757 758 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 759 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 760 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active = p->p_msvr); 761 cd18xx_write(sc, CD18xx_COR1, p->p_cor1); 762 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 763 cd18xx_write(sc, CD18xx_COR3, p->p_cor3); 764 /* 765 * COR2 and COR3 change commands are not required here for 766 * the CL-CD1865 but we do them anyway for simplicity. 767 */ 768 cd18xx_write(sc, CD18xx_CCR, CD18xx_CCR_CORCHG | 769 CD18xx_CCR_CORCHG_COR1 | 770 CD18xx_CCR_CORCHG_COR2 | 771 CD18xx_CCR_CORCHG_COR3); 772 cd18xx_write(sc, CD18xx_RBPRH, p->p_rbprh); 773 cd18xx_write(sc, CD18xx_RBPRL, p->p_rbprl); 774 cd18xx_write(sc, CD18xx_TBPRH, p->p_tbprh); 775 cd18xx_write(sc, CD18xx_TBPRL, p->p_tbprl); 776 if (cd18xx_wait_ccr(sc)) { 777 DPRINTF(CDD_INFO, 778 ("%s: cdtty_loadchannelregs ccr wait timed out\n", 779 sc->sc_dev.dv_xname)); 780 } 781 cd18xx_write(sc, CD18xx_CCR, p->p_chanctl); 782 } 783 784 /* 785 * Set tty parameters from termios. 786 * XXX - Should just copy the whole termios after 787 * making sure all the changes could be done. 788 */ 789 static int 790 cdttyparam(tp, t) 791 struct tty *tp; 792 struct termios *t; 793 { 794 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 795 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 796 int s; 797 798 /* Check requested parameters. */ 799 if (t->c_ospeed < 0) 800 return (EINVAL); 801 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 802 return (EINVAL); 803 804 /* 805 * For the console, always force CLOCAL and !HUPCL, so that the port 806 * is always active. 807 */ 808 if (ISSET(p->p_swflags, TIOCFLAG_SOFTCAR)) { 809 SET(t->c_cflag, CLOCAL); 810 CLR(t->c_cflag, HUPCL); 811 } 812 813 /* 814 * If there were no changes, don't do anything. This avoids dropping 815 * input and improves performance when all we did was frob things like 816 * VMIN and VTIME. 817 */ 818 if (tp->t_ospeed == t->c_ospeed && 819 tp->t_cflag == t->c_cflag) 820 return (0); 821 822 /* 823 * Block interrupts so that state will not 824 * be altered until we are done setting it up. 825 */ 826 s = splserial(); 827 828 /* 829 * Copy across the size, parity and stop bit info. 830 */ 831 switch (t->c_cflag & CSIZE) { 832 case CS5: 833 p->p_cor1 = CD18xx_COR1_CS5; 834 break; 835 case CS6: 836 p->p_cor1 = CD18xx_COR1_CS6; 837 break; 838 case CS7: 839 p->p_cor1 = CD18xx_COR1_CS7; 840 break; 841 default: 842 p->p_cor1 = CD18xx_COR1_CS8; 843 break; 844 } 845 if (ISSET(t->c_cflag, PARENB)) { 846 SET(p->p_cor1, CD18xx_COR1_PARITY_NORMAL); 847 if (ISSET(t->c_cflag, PARODD)) 848 SET(p->p_cor1, CD18xx_COR1_PARITY_ODD); 849 } 850 if (!ISSET(t->c_iflag, INPCK)) 851 SET(p->p_cor1, CD18xx_COR1_IGNORE); 852 if (ISSET(t->c_cflag, CSTOPB)) 853 SET(p->p_cor1, CD18xx_COR1_STOPBIT_2); 854 855 /* 856 * If we're not in a mode that assumes a connection is present, then 857 * ignore carrier changes. 858 */ 859 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 860 p->p_msvr_dcd = 0; 861 else 862 p->p_msvr_dcd = CD18xx_MSVR_CD; 863 864 /* 865 * Set the flow control pins depending on the current flow control 866 * mode. 867 */ 868 if (ISSET(t->c_cflag, CRTSCTS)) { 869 p->p_mcor1_dtr = CD18xx_MCOR1_DTR; 870 p->p_msvr_rts = CD18xx_MSVR_RTS; 871 p->p_msvr_cts = CD18xx_MSVR_CTS; 872 p->p_cor2 = CD18xx_COR2_RTSAOE|CD18xx_COR2_CTSAE; 873 } else if (ISSET(t->c_cflag, MDMBUF)) { 874 /* 875 * For DTR/DCD flow control, make sure we don't toggle DTR for 876 * carrier detection. 877 */ 878 p->p_mcor1_dtr = 0; 879 p->p_msvr_rts = CD18xx_MSVR_DTR; 880 p->p_msvr_cts = CD18xx_MSVR_CD; 881 p->p_cor2 = 0; 882 } else { 883 /* 884 * If no flow control, then always set RTS. This will make 885 * the other side happy if it mistakenly thinks we're doing 886 * RTS/CTS flow control. 887 */ 888 p->p_mcor1_dtr = CD18xx_MSVR_DTR; 889 p->p_msvr_rts = 0; 890 p->p_msvr_cts = 0; 891 p->p_cor2 = 0; 892 } 893 p->p_msvr_mask = p->p_msvr_cts | p->p_msvr_dcd; 894 895 /* 896 * Set the FIFO threshold based on the receive speed. 897 * 898 * * If it's a low speed, it's probably a mouse or some other 899 * interactive device, so set the threshold low. 900 * * If it's a high speed, trim the trigger level down to prevent 901 * overflows. 902 * * Otherwise set it a bit higher. 903 */ 904 p->p_cor3 = (t->c_ospeed <= 1200 ? 1 : 905 t->c_ospeed <= 38400 ? 8 : 4); 906 907 #define PORT_RATE(o, s) \ 908 (((((o) + (s)/2) / (s)) + CD18xx_xBRPR_TPC/2) / CD18xx_xBRPR_TPC) 909 /* Compute BPS for the requested speeds */ 910 if (t->c_ospeed) { 911 u_int32_t tbpr = PORT_RATE(sc->sc_osc, t->c_ospeed); 912 913 if (tbpr == 0 || tbpr > 0xffff) 914 return (EINVAL); 915 916 p->p_tbprh = tbpr >> 8; 917 p->p_tbprl = tbpr & 0xff; 918 } 919 920 if (t->c_ispeed) { 921 u_int32_t rbpr = PORT_RATE(sc->sc_osc, t->c_ispeed); 922 923 if (rbpr == 0 || rbpr > 0xffff) 924 return (EINVAL); 925 926 p->p_rbprh = rbpr >> 8; 927 p->p_rbprl = rbpr & 0xff; 928 } 929 930 /* And copy to tty. */ 931 tp->t_ispeed = 0; 932 tp->t_ospeed = t->c_ospeed; 933 tp->t_cflag = t->c_cflag; 934 935 if (!p->p_heldchange) { 936 if (p->p_tx_busy) { 937 p->p_heldtbc = p->p_tbc; 938 p->p_tbc = 0; 939 p->p_heldchange = 1; 940 } else 941 cdtty_loadchannelregs(sc, p); 942 } 943 944 if (!ISSET(t->c_cflag, CHWFLOW)) { 945 /* Disable the high water mark. */ 946 p->p_r_hiwat = 0; 947 p->p_r_lowat = 0; 948 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 949 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 950 softintr_schedule(sc->sc_si); 951 } 952 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 953 CLR(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 954 cdtty_hwiflow(sc, p); 955 } 956 } else { 957 p->p_r_hiwat = cdtty_rbuf_hiwat; 958 p->p_r_lowat = cdtty_rbuf_lowat; 959 } 960 961 splx(s); 962 963 /* 964 * Update the tty layer's idea of the carrier bit, in case we changed 965 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 966 * explicit request. 967 */ 968 (void) (*tp->t_linesw->l_modem)(tp, ISSET(p->p_msvr, CD18xx_MSVR_CD)); 969 970 if (!ISSET(t->c_cflag, CHWFLOW)) { 971 if (p->p_tx_stopped) { 972 p->p_tx_stopped = 0; 973 cdttystart(tp); 974 } 975 } 976 977 return (0); 978 } 979 980 static void 981 cdtty_break(sc, p, onoff) 982 struct cd18xx_softc *sc; 983 struct cdtty_port *p; 984 int onoff; 985 { 986 987 /* tell tx intr handler we need a break */ 988 p->p_needbreak = !!onoff; 989 990 /* turn on tx interrupts if break has changed */ 991 if (p->p_needbreak != p->p_break) 992 SET(p->p_srer, CD18xx_SRER_Tx); 993 994 if (!p->p_heldchange) { 995 if (p->p_tx_busy) { 996 p->p_heldtbc = p->p_tbc; 997 p->p_tbc = 0; 998 p->p_heldchange = 1; 999 } else 1000 cdtty_loadchannelregs(sc, p); 1001 } 1002 } 1003 1004 /* 1005 * Raise or lower modem control (DTR/RTS) signals. If a character is 1006 * in transmission, the change is deferred. 1007 */ 1008 static void 1009 cdtty_modem(sc, p, onoff) 1010 struct cd18xx_softc *sc; 1011 struct cdtty_port *p; 1012 int onoff; 1013 { 1014 1015 if (p->p_mcor1_dtr == 0) 1016 return; 1017 1018 if (onoff) 1019 CLR(p->p_mcor1, p->p_mcor1_dtr); 1020 else 1021 SET(p->p_mcor1, p->p_mcor1_dtr); 1022 1023 if (!p->p_heldchange) { 1024 if (p->p_tx_busy) { 1025 p->p_heldtbc = p->p_tbc; 1026 p->p_tbc = 0; 1027 p->p_heldchange = 1; 1028 } else 1029 cdtty_loadchannelregs(sc, p); 1030 } 1031 } 1032 1033 /* 1034 * Try to block or unblock input using hardware flow-control. 1035 * This is called by kern/tty.c if MDMBUF|CRTSCTS is set, and 1036 * if this function returns non-zero, the TS_TBLOCK flag will 1037 * be set or cleared according to the "block" arg passed. 1038 */ 1039 int 1040 cdttyhwiflow(tp, block) 1041 struct tty *tp; 1042 int block; 1043 { 1044 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 1045 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 1046 int s; 1047 1048 if (p->p_msvr_rts == 0) 1049 return (0); 1050 1051 s = splserial(); 1052 if (block) { 1053 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1054 SET(p->p_rx_flags, RX_TTY_BLOCKED); 1055 cdtty_hwiflow(sc, p); 1056 } 1057 } else { 1058 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1059 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 1060 softintr_schedule(sc->sc_si); 1061 } 1062 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1063 CLR(p->p_rx_flags, RX_TTY_BLOCKED); 1064 cdtty_hwiflow(sc, p); 1065 } 1066 } 1067 splx(s); 1068 return (1); 1069 } 1070 1071 /* 1072 * Internal version of cdttyhwiflow, called at cdtty's priority. 1073 */ 1074 static void 1075 cdtty_hwiflow(sc, p) 1076 struct cd18xx_softc *sc; 1077 struct cdtty_port *p; 1078 { 1079 1080 if (p->p_msvr_rts == 0) 1081 return; 1082 1083 if (ISSET(p->p_rx_flags, RX_ANY_BLOCK)) { 1084 CLR(p->p_msvr, p->p_msvr_rts); 1085 CLR(p->p_msvr_active, p->p_msvr_rts); 1086 } else { 1087 SET(p->p_msvr, p->p_msvr_rts); 1088 SET(p->p_msvr_active, p->p_msvr_rts); 1089 } 1090 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 1091 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active); 1092 } 1093 1094 /* 1095 * indiviual interrupt routines. 1096 */ 1097 1098 /* 1099 * this is the number of interrupts allowed, total. set it to 0 1100 * to allow unlimited interrpts 1101 */ 1102 #define INTR_MAX_ALLOWED 0 1103 1104 #if INTR_MAX_ALLOWED == 0 1105 #define GOTINTR(sc, p) /* nothing */ 1106 #else 1107 int intrcount; 1108 #define GOTINTR(sc, p) \ 1109 do { \ 1110 if (intrcount++ == INTR_MAX_ALLOWED) { \ 1111 CLR(p->p_srer, CD18xx_SRER_Tx); \ 1112 cd18xx_write(sc, CD18xx_SRER, p->p_srer); \ 1113 } \ 1114 DPRINTF(CDD_INTR, (", intrcount %d srer %x", intrcount, p->p_srer)); \ 1115 } while (0) 1116 #endif 1117 1118 /* receiver interrupt */ 1119 static __inline void 1120 cd18xx_rint(sc, ns) 1121 struct cd18xx_softc *sc; 1122 int *ns; 1123 { 1124 struct cdtty_port *p; 1125 u_int channel, count; 1126 u_char *put, *end; 1127 u_int cc; 1128 1129 /* work out the channel and softc */ 1130 channel = cd18xx_get_gscr1_channel(sc); 1131 p = &sc->sc_ports[channel]; 1132 DPRINTF(CDD_INTR, ("%s: rint: channel %d", sc->sc_dev.dv_xname, channel)); 1133 GOTINTR(sc, p); 1134 1135 end = p->p_ebuf; 1136 put = p->p_rbput; 1137 cc = p->p_rbavail; 1138 1139 /* read as many bytes as necessary */ 1140 count = cd18xx_read(sc, CD18xx_RDCR); 1141 DPRINTF(CDD_INTR, (", %d bytes available: ", count)); 1142 1143 while (cc > 0 && count > 0) { 1144 u_char rcsr = cd18xx_read(sc, CD18xx_RCSR); 1145 1146 put[0] = cd18xx_read(sc, CD18xx_RDR); 1147 put[1] = rcsr; 1148 1149 if (rcsr) 1150 *ns = 1; 1151 1152 put += 2; 1153 if (put >= end) 1154 put = p->p_rbuf; 1155 1156 DPRINTF(CDD_INTR, (".")); 1157 cc--; 1158 count--; 1159 } 1160 1161 DPRINTF(CDD_INTR, (" finished reading")); 1162 1163 /* 1164 * Current string of incoming characters ended because 1165 * no more data was available or we ran out of space. 1166 * If we're out of space, turn off receive interrupts. 1167 */ 1168 p->p_rbput = put; 1169 p->p_rbavail = cc; 1170 if (!ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1171 p->p_rx_ready = 1; 1172 } 1173 1174 /* 1175 * If we're out of space, disable receive interrupts 1176 * until the queue has drained a bit. 1177 */ 1178 if (!cc) { 1179 SET(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1180 CLR(p->p_srer, CD18xx_SRER_Rx | 1181 CD18xx_SRER_RxSC | 1182 CD18xx_SRER_CD); 1183 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1184 } 1185 1186 /* finish the interrupt transaction with the IC */ 1187 cd18xx_write(sc, CD18xx_EOSRR, 0); 1188 DPRINTF(CDD_INTR, (", done\n")); 1189 } 1190 1191 /* 1192 * transmitter interrupt 1193 * 1194 * note this relys on the fact that we allow the transmitter FIFO to 1195 * drain completely 1196 */ 1197 static __inline void 1198 cd18xx_tint(sc, ns) 1199 struct cd18xx_softc *sc; 1200 int *ns; 1201 { 1202 struct cdtty_port *p; 1203 u_int channel; 1204 1205 /* work out the channel and softc */ 1206 channel = cd18xx_get_gscr1_channel(sc); 1207 p = &sc->sc_ports[channel]; 1208 DPRINTF(CDD_INTR, ("%s: tint: channel %d", sc->sc_dev.dv_xname, 1209 channel)); 1210 GOTINTR(sc, p); 1211 1212 /* if the current break condition is wrong, fix it */ 1213 if (p->p_break != p->p_needbreak) { 1214 u_char buf[2]; 1215 1216 DPRINTF(CDD_INTR, (", changing break to %d", p->p_needbreak)); 1217 1218 /* turn on ETC processing */ 1219 cd18xx_write(sc, CD18xx_COR2, p->p_cor2 | CD18xx_COR2_ETC); 1220 1221 buf[0] = CD18xx_TDR_ETC_BYTE; 1222 buf[1] = p->p_needbreak ? CD18xx_TDR_BREAK_BYTE : 1223 CD18xx_TDR_NOBREAK_BYTE; 1224 cd18xx_write_multi(sc, CD18xx_TDR, buf, 2); 1225 1226 p->p_break = p->p_needbreak; 1227 1228 /* turn off ETC processing */ 1229 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 1230 } 1231 1232 /* 1233 * If we've delayed a parameter change, do it now, and restart 1234 * output. 1235 */ 1236 if (p->p_heldchange) { 1237 cdtty_loadchannelregs(sc, p); 1238 p->p_heldchange = 0; 1239 p->p_tbc = p->p_heldtbc; 1240 p->p_heldtbc = 0; 1241 } 1242 1243 /* Output the next chunk of the contiguous buffer, if any. */ 1244 if (p->p_tbc > 0) { 1245 int n; 1246 1247 n = p->p_tbc; 1248 if (n > 8) /* write up to 8 entries */ 1249 n = 8; 1250 DPRINTF(CDD_INTR, (", writing %d bytes to TDR", n)); 1251 cd18xx_write_multi(sc, CD18xx_TDR, p->p_tba, n); 1252 p->p_tbc -= n; 1253 p->p_tba += n; 1254 } 1255 1256 /* Disable transmit completion interrupts if we ran out of bytes. */ 1257 if (p->p_tbc == 0) { 1258 /* Note that Tx interupts should already be enabled */ 1259 if (ISSET(p->p_srer, CD18xx_SRER_Tx)) { 1260 DPRINTF(CDD_INTR, (", disabling tx interrupts")); 1261 CLR(p->p_srer, CD18xx_SRER_Tx); 1262 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1263 } 1264 if (p->p_tx_busy) { 1265 p->p_tx_busy = 0; 1266 p->p_tx_done = 1; 1267 } 1268 } 1269 *ns = 1; 1270 1271 /* finish the interrupt transaction with the IC */ 1272 cd18xx_write(sc, CD18xx_EOSRR, 0); 1273 DPRINTF(CDD_INTR, (", done\n")); 1274 } 1275 1276 /* modem signal change interrupt */ 1277 static __inline void 1278 cd18xx_mint(sc, ns) 1279 struct cd18xx_softc *sc; 1280 int *ns; 1281 { 1282 struct cdtty_port *p; 1283 u_int channel; 1284 u_char msvr, delta; 1285 1286 /* work out the channel and softc */ 1287 channel = cd18xx_get_gscr1_channel(sc); 1288 p = &sc->sc_ports[channel]; 1289 DPRINTF(CDD_INTR, ("%s: mint: channel %d", sc->sc_dev.dv_xname, channel)); 1290 GOTINTR(sc, p); 1291 1292 /* 1293 * We ignore the MCR register, and handle detecting deltas 1294 * via software, like many other serial drivers. 1295 */ 1296 msvr = cd18xx_read(sc, CD18xx_MSVR); 1297 delta = msvr ^ p->p_msvr; 1298 DPRINTF(CDD_INTR, (", msvr %d", msvr)); 1299 1300 /* 1301 * Process normal status changes 1302 */ 1303 if (ISSET(delta, p->p_msvr_mask)) { 1304 SET(p->p_msvr_delta, delta); 1305 1306 DPRINTF(CDD_INTR, (", status changed delta %d", delta)); 1307 /* 1308 * Stop output immediately if we lose the output 1309 * flow control signal or carrier detect. 1310 */ 1311 if (ISSET(~msvr, p->p_msvr_mask)) { 1312 p->p_tbc = 0; 1313 p->p_heldtbc = 0; 1314 /* Stop modem interrupt processing */ 1315 } 1316 p->p_st_check = 1; 1317 *ns = 1; 1318 } 1319 1320 /* reset the modem signal register */ 1321 cd18xx_write(sc, CD18xx_MCR, 0); 1322 1323 /* finish the interrupt transaction with the IC */ 1324 cd18xx_write(sc, CD18xx_EOSRR, 0); 1325 DPRINTF(CDD_INTR, (", done\n")); 1326 } 1327 1328 /* 1329 * hardware interrupt routine. call the relevant interrupt routines until 1330 * no interrupts are pending. 1331 * 1332 * note: we do receive interrupts before all others (as we'd rather lose 1333 * a chance to transmit, than lose a character). and we do transmit 1334 * interrupts before modem interrupts. 1335 * 1336 * we have to traverse all of the cd18xx's attached, unfortunately. 1337 */ 1338 int 1339 cd18xx_hardintr(v) 1340 void *v; 1341 { 1342 int i, rv = 0; 1343 u_char ack; 1344 1345 DPRINTF(CDD_INTR, ("cd18xx_hardintr (ndevs %d):\n", clcd_cd.cd_ndevs)); 1346 for (i = 0; i < clcd_cd.cd_ndevs; i++) 1347 { 1348 struct cd18xx_softc *sc = clcd_cd.cd_devs[i]; 1349 int status, ns = 0; 1350 int count = 1; /* process only 1 interrupts at a time for now */ 1351 1352 if (sc == NULL) 1353 continue; 1354 1355 DPRINTF(CDD_INTR, ("%s:", sc->sc_dev.dv_xname)); 1356 while (count-- && 1357 (status = (cd18xx_read(sc, CD18xx_SRSR) & 1358 CD18xx_SRSR_PENDING))) { 1359 rv = 1; 1360 1361 DPRINTF(CDD_INTR, (" status %x:", status)); 1362 if (ISSET(status, CD18xx_SRSR_RxPEND)) { 1363 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1364 CD18xx_INTRACK_RxINT); 1365 DPRINTF(CDD_INTR, (" rx: ack1 %x\n", ack)); 1366 cd18xx_rint(sc, &ns); 1367 } 1368 if (ISSET(status, CD18xx_SRSR_TxPEND)) { 1369 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1370 CD18xx_INTRACK_TxINT); 1371 DPRINTF(CDD_INTR, (" tx: ack1 %x\n", ack)); 1372 cd18xx_tint(sc, &ns); 1373 1374 } 1375 if (ISSET(status, CD18xx_SRSR_MxPEND)) { 1376 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1377 CD18xx_INTRACK_MxINT); 1378 DPRINTF(CDD_INTR, (" mx: ack1 %x\n", ack)); 1379 cd18xx_mint(sc, &ns); 1380 } 1381 } 1382 if (ns) 1383 softintr_schedule(sc->sc_si); 1384 } 1385 1386 return (rv); 1387 } 1388 1389 /* 1390 * software interrupt 1391 */ 1392 1393 void 1394 cdtty_rxsoft(sc, p, tp) 1395 struct cd18xx_softc *sc; 1396 struct cdtty_port *p; 1397 struct tty *tp; 1398 { 1399 u_char *get, *end; 1400 u_int cc, scc; 1401 u_char rcsr; 1402 int code; 1403 int s; 1404 1405 end = p->p_ebuf; 1406 get = p->p_rbget; 1407 scc = cc = cdtty_rbuf_size - p->p_rbavail; 1408 1409 if (cc == cdtty_rbuf_size) { 1410 p->p_floods++; 1411 #if 0 1412 if (p->p_errors++ == 0) 1413 callout_reset(&p->p_diag_callout, 60 * hz, 1414 cdttydiag, p); 1415 #endif 1416 } 1417 1418 while (cc) { 1419 code = get[0]; 1420 rcsr = get[1]; 1421 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR | CD18xx_RCSR_BREAK | 1422 CD18xx_RCSR_FRAMERR | CD18xx_RCSR_PARITYERR)) { 1423 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR)) { 1424 p->p_overflows++; 1425 #if 0 1426 if (p->p_errors++ == 0) 1427 callout_reset(&p->p_diag_callout, 1428 60 * hz, cdttydiag, p); 1429 #endif 1430 } 1431 if (ISSET(rcsr, CD18xx_RCSR_BREAK|CD18xx_RCSR_FRAMERR)) 1432 SET(code, TTY_FE); 1433 if (ISSET(rcsr, CD18xx_RCSR_PARITYERR)) 1434 SET(code, TTY_PE); 1435 } 1436 if ((*tp->t_linesw->l_rint)(code, tp) == -1) { 1437 /* 1438 * The line discipline's buffer is out of space. 1439 */ 1440 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1441 /* 1442 * We're either not using flow control, or the 1443 * line discipline didn't tell us to block for 1444 * some reason. Either way, we have no way to 1445 * know when there's more space available, so 1446 * just drop the rest of the data. 1447 */ 1448 get += cc << 1; 1449 if (get >= end) 1450 get -= cdtty_rbuf_size << 1; 1451 cc = 0; 1452 } else { 1453 /* 1454 * Don't schedule any more receive processing 1455 * until the line discipline tells us there's 1456 * space available (through cdttyhwiflow()). 1457 * Leave the rest of the data in the input 1458 * buffer. 1459 */ 1460 SET(p->p_rx_flags, RX_TTY_OVERFLOWED); 1461 } 1462 break; 1463 } 1464 get += 2; 1465 if (get >= end) 1466 get = p->p_rbuf; 1467 cc--; 1468 } 1469 1470 if (cc != scc) { 1471 p->p_rbget = get; 1472 s = splserial(); 1473 1474 cc = p->p_rbavail += scc - cc; 1475 /* Buffers should be ok again, release possible block. */ 1476 if (cc >= p->p_r_lowat) { 1477 if (ISSET(p->p_rx_flags, RX_IBUF_OVERFLOWED)) { 1478 CLR(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1479 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 1480 SET(p->p_srer, CD18xx_SRER_Rx | 1481 CD18xx_SRER_RxSC | 1482 CD18xx_SRER_CD); 1483 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1484 } 1485 if (ISSET(p->p_rx_flags, RX_IBUF_BLOCKED)) { 1486 CLR(p->p_rx_flags, RX_IBUF_BLOCKED); 1487 cdtty_hwiflow(sc, p); 1488 } 1489 } 1490 splx(s); 1491 } 1492 } 1493 1494 void 1495 cdtty_txsoft(sc, p, tp) 1496 struct cd18xx_softc *sc; 1497 struct cdtty_port *p; 1498 struct tty *tp; 1499 { 1500 1501 CLR(tp->t_state, TS_BUSY); 1502 if (ISSET(tp->t_state, TS_FLUSH)) 1503 CLR(tp->t_state, TS_FLUSH); 1504 else 1505 ndflush(&tp->t_outq, (int)(p->p_tba - tp->t_outq.c_cf)); 1506 (*tp->t_linesw->l_start)(tp); 1507 } 1508 1509 void 1510 cdtty_stsoft(sc, p, tp) 1511 struct cd18xx_softc *sc; 1512 struct cdtty_port *p; 1513 struct tty *tp; 1514 { 1515 u_char msvr, delta; 1516 int s; 1517 1518 s = splserial(); 1519 msvr = p->p_msvr; 1520 delta = p->p_msvr_delta; 1521 p->p_msvr_delta = 0; 1522 splx(s); 1523 1524 if (ISSET(delta, p->p_msvr_dcd)) { 1525 /* 1526 * Inform the tty layer that carrier detect changed. 1527 */ 1528 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msvr, CD18xx_MSVR_CD)); 1529 } 1530 1531 if (ISSET(delta, p->p_msvr_cts)) { 1532 /* Block or unblock output according to flow control. */ 1533 if (ISSET(msvr, p->p_msvr_cts)) { 1534 p->p_tx_stopped = 0; 1535 (*tp->t_linesw->l_start)(tp); 1536 } else { 1537 p->p_tx_stopped = 1; 1538 } 1539 } 1540 } 1541 1542 void 1543 cd18xx_softintr(v) 1544 void *v; 1545 { 1546 struct cd18xx_softc *sc = v; 1547 struct cdtty_port *p; 1548 struct tty *tp; 1549 int i; 1550 1551 for (i = 0; i < 8; i++) { 1552 p = &sc->sc_ports[i]; 1553 1554 tp = p->p_tty; 1555 if (tp == NULL) 1556 continue; 1557 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1558 continue; 1559 1560 if (p->p_rx_ready) { 1561 p->p_rx_ready = 0; 1562 cdtty_rxsoft(sc, p, tp); 1563 } 1564 1565 if (p->p_st_check) { 1566 p->p_st_check = 0; 1567 cdtty_stsoft(sc, p, tp); 1568 } 1569 1570 if (p->p_tx_done) { 1571 p->p_tx_done = 0; 1572 cdtty_txsoft(sc, p, tp); 1573 } 1574 } 1575 } 1576
Indexes created Mon Sep 29 03:10:08 GMT 2025