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sys/dev/ic/cd18xx.c
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1 /* $NetBSD: cd18xx.c,v 1.26 2008/06/12 22:30:30 cegger Exp $ */ 2 3 /* XXXad does this even compile? */ 4 5 /* 6 * Copyright (c) 1998, 2001 Matthew R. Green 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 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 * 47 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 48 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 51 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 57 * POSSIBILITY OF SUCH DAMAGE. 58 */ 59 60 /* 61 * Copyright (c) 1991 The Regents of the University of California. 62 * All rights reserved. 63 * 64 * Redistribution and use in source and binary forms, with or without 65 * modification, are permitted provided that the following conditions 66 * are met: 67 * 1. Redistributions of source code must retain the above copyright 68 * notice, this list of conditions and the following disclaimer. 69 * 2. Redistributions in binary form must reproduce the above copyright 70 * notice, this list of conditions and the following disclaimer in the 71 * documentation and/or other materials provided with the distribution. 72 * 3. Neither the name of the University nor the names of its contributors 73 * may be used to endorse or promote products derived from this software 74 * without specific prior written permission. 75 * 76 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 77 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 78 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 79 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 80 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 81 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 82 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 83 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 84 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 85 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 86 * SUCH DAMAGE. 87 * 88 * @(#)com.c 7.5 (Berkeley) 5/16/91 89 */ 90 91 /* 92 * cirrus logic CL-CD180/CD1864/CD1865 driver, based in (large) parts on 93 * the com and z8530 drivers. thanks charles. 94 */ 95 96 #include <sys/cdefs.h> 97 __KERNEL_RCSID(0, "$NetBSD: cd18xx.c,v 1.26 2008/06/12 22:30:30 cegger Exp $"); 98 99 #include <sys/param.h> 100 #include <sys/conf.h> 101 #include <sys/device.h> 102 #include <sys/systm.h> 103 #include <sys/malloc.h> 104 #include <sys/proc.h> 105 #include <sys/kernel.h> 106 #include <sys/tty.h> 107 #include <sys/fcntl.h> 108 #include <sys/kauth.h> 109 #include <sys/intr.h> 110 111 #include <sys/bus.h> 112 113 #include <dev/ic/cd18xxvar.h> 114 #include <dev/ic/cd18xxreg.h> 115 116 #include "ioconf.h" 117 118 /* 119 * some helpers 120 */ 121 122 /* macros to clear/set/test flags. */ 123 #define SET(t, f) (t) |= (f) 124 #define CLR(t, f) (t) &= ~(f) 125 #define ISSET(t, f) ((t) & (f)) 126 127 static void cdtty_attach(struct cd18xx_softc *, int); 128 129 static inline void cd18xx_rint(struct cd18xx_softc *, int *); 130 static inline void cd18xx_tint(struct cd18xx_softc *, int *); 131 static inline void cd18xx_mint(struct cd18xx_softc *, int *); 132 133 void cdtty_rxsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 134 void cdtty_txsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 135 void cdtty_stsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 136 void cd18xx_softintr(void *); 137 138 dev_type_open(cdttyopen); 139 dev_type_close(cdttyclose); 140 dev_type_read(cdttyread); 141 dev_type_write(cdttywrite); 142 dev_type_ioctl(cdttyioctl); 143 dev_type_stop(cdttystop); 144 dev_type_tty(cdttytty); 145 dev_type_poll(cdttypoll); 146 147 const struct cdevsw cdtty_cdevsw = { 148 cdttyopen, cdttyclose, cdttyread, cdttywrite, cdttyioctl, 149 cdttystop, cdttytty, cdttypoll, nommap, ttykqfilter, D_TTY 150 }; 151 152 static void cdtty_shutdown(struct cd18xx_softc *, struct cdtty_port *); 153 static void cdttystart(struct tty *); 154 static int cdttyparam(struct tty *, struct termios *); 155 static void cdtty_break(struct cd18xx_softc *, struct cdtty_port *, int); 156 static void cdtty_modem(struct cd18xx_softc *, struct cdtty_port *, int); 157 static int cdttyhwiflow(struct tty *, int); 158 static void cdtty_hwiflow(struct cd18xx_softc *, struct cdtty_port *); 159 160 static void cdtty_loadchannelregs(struct cd18xx_softc *, 161 struct cdtty_port *); 162 163 /* default read buffer size */ 164 u_int cdtty_rbuf_size = CDTTY_RING_SIZE; 165 166 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 167 u_int cdtty_rbuf_hiwat = (CDTTY_RING_SIZE * 1) / 4; 168 u_int cdtty_rbuf_lowat = (CDTTY_RING_SIZE * 3) / 4; 169 170 #define CD18XXDEBUG 171 #ifdef CD18XXDEBUG 172 #define CDD_INFO 0x0001 173 #define CDD_INTR 0x0002 174 int cd18xx_debug = CDD_INTR|CDD_INFO; 175 # define DPRINTF(l, x) if (cd18xx_debug & l) printf x 176 #else 177 # define DPRINTF(l, x) /* nothing */ 178 #endif 179 180 /* Known supported revisions. */ 181 struct cd18xx_revs { 182 u_char revision; 183 u_char onehundred_pin; 184 char *name; 185 } cd18xx_revs[] = { 186 { CD180_GFRCR_REV_B, 0, "CL-CD180 rev. B" }, 187 { CD180_GFRCR_REV_C, 0, "CL-CD180 rev. C" }, 188 { CD1864_GFRCR_REVISION_A, 1, "CL-CD1864 rev. A" }, 189 { CD1865_GFRCR_REVISION_A, 1, "CL-CD1865 rev. A" }, 190 { CD1865_GFRCR_REVISION_B, 1, "CL-CD1865 rev. B" }, 191 { CD1865_GFRCR_REVISION_C, 1, "CL-CD1865 rev. C" }, 192 { 0, 0, 0 } 193 }; 194 195 /* wait for the CCR to go to zero */ 196 static inline int cd18xx_wait_ccr(struct cd18xx_softc *); 197 static inline int 198 cd18xx_wait_ccr(sc) 199 struct cd18xx_softc *sc; 200 { 201 int i = 100000; 202 203 while (--i && 204 bus_space_read_1(sc->sc_tag, sc->sc_handle, CD18xx_CCR) != 0) 205 ; 206 return (i == 0); 207 } 208 209 /* 210 * device attach routine, high-end portion 211 */ 212 void 213 cd18xx_attach(sc) 214 struct cd18xx_softc *sc; 215 { 216 static int chip_id_next = 1; 217 int onehundred_pin, revision, i, port; 218 219 /* read and print the revision */ 220 revision = cd18xx_read(sc, CD18xx_GFRCR); 221 onehundred_pin = ISSET(cd18xx_read(sc, CD18xx_SRCR),CD18xx_SRCR_PKGTYP); 222 for (i = 0; cd18xx_revs[i].name; i++) 223 if (revision == cd18xx_revs[i].revision || 224 onehundred_pin == cd18xx_revs[i].onehundred_pin) { 225 printf(": %s", cd18xx_revs[i].name); 226 break; 227 } 228 229 if (cd18xx_revs[i].name == NULL) { 230 aprint_error_dev(&sc->sc_dev, "unknown revision, bailing.\n"); 231 return; 232 } 233 234 /* prepare for reset */ 235 cd18xx_set_car(sc, 0); 236 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_CLEAR); 237 238 /* wait for CCR to go to zero */ 239 if (cd18xx_wait_ccr(sc)) { 240 printf("cd18xx_attach: reset change command timed out\n"); 241 return; 242 } 243 244 /* full reset of all channels */ 245 cd18xx_write(sc, CD18xx_CCR, 246 CD18xx_CCR_RESET|CD18xx_CCR_RESET_HARD); 247 248 /* loop until the GSVR is ready */ 249 i = 100000; 250 while (--i && cd18xx_read(sc, CD18xx_GSVR) == CD18xx_GSVR_READY) 251 ; 252 if (i == 0) { 253 aprint_normal("\n"); 254 aprint_error_dev(&sc->sc_dev, "did not reset!\n"); 255 return; 256 } 257 258 /* write the chip_id */ 259 sc->sc_chip_id = chip_id_next++; 260 #ifdef DIAGNOSTIC 261 if (sc->sc_chip_id > 31) 262 panic("more than 31 cd18xx's? help."); 263 #endif 264 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_SETID(sc)); 265 266 /* rx/tx/modem service match vectors, initalised by higher level */ 267 cd18xx_write(sc, CD18xx_MSMR, sc->sc_msmr | 0x80); 268 cd18xx_write(sc, CD18xx_TSMR, sc->sc_tsmr | 0x80); 269 cd18xx_write(sc, CD18xx_RSMR, sc->sc_rsmr | 0x80); 270 271 printf(", gsvr %x msmr %x tsmr %x rsmr %x", 272 cd18xx_read(sc, CD18xx_GSVR), 273 cd18xx_read(sc, CD18xx_MSMR), 274 cd18xx_read(sc, CD18xx_TSMR), 275 cd18xx_read(sc, CD18xx_RSMR)); 276 277 /* prescale registers */ 278 sc->sc_pprh = 0xf0; 279 sc->sc_pprl = 0; 280 cd18xx_write(sc, CD18xx_PPRH, sc->sc_pprh); 281 cd18xx_write(sc, CD18xx_PPRL, sc->sc_pprl); 282 283 /* establish our soft interrupt. */ 284 sc->sc_si = softint_establish(SOFTINT_SERIAL, cd18xx_softintr, sc); 285 286 printf(", 8 ports ready (chip id %d)\n", sc->sc_chip_id); 287 288 /* 289 * finally, we loop over all 8 channels initialising them 290 */ 291 for (port = 0; port < 8; port++) 292 cdtty_attach(sc, port); 293 } 294 295 /* tty portion of the code */ 296 297 /* 298 * tty portion attach routine 299 */ 300 void 301 cdtty_attach(sc, port) 302 struct cd18xx_softc *sc; 303 int port; 304 { 305 struct cdtty_port *p = &sc->sc_ports[port]; 306 int i; 307 308 /* load CAR with channel number */ 309 cd18xx_set_car(sc, port); 310 311 /* wait for CCR to go to zero */ 312 if (cd18xx_wait_ccr(sc)) { 313 printf("cd18xx_attach: change command timed out setting " 314 "CAR for port %d\n", i); 315 return; 316 } 317 318 /* set the RPTR to (arbitrary) 8 */ 319 cd18xx_write(sc, CD18xx_RTPR, 8); 320 321 /* reset the modem signal value register */ 322 sc->sc_ports[port].p_msvr = CD18xx_MSVR_RESET; 323 324 /* zero the service request enable register */ 325 cd18xx_write(sc, CD18xx_SRER, 0); 326 327 /* enable the transmitter & receiver */ 328 SET(p->p_chanctl, CD18xx_CCR_CHANCTL | 329 CD18xx_CCR_CHANCTL_TxEN | 330 CD18xx_CCR_CHANCTL_RxEN); 331 332 /* XXX no console or kgdb support yet! */ 333 334 /* get a tty structure */ 335 p->p_tty = ttymalloc(); 336 p->p_tty->t_oproc = cdttystart; 337 p->p_tty->t_param = cdttyparam; 338 p->p_tty->t_hwiflow = cdttyhwiflow; 339 340 p->p_rbuf = malloc(cdtty_rbuf_size << 1, M_DEVBUF, M_WAITOK); 341 p->p_rbput = p->p_rbget = p->p_rbuf; 342 p->p_rbavail = cdtty_rbuf_size; 343 if (p->p_rbuf == NULL) { 344 aprint_error_dev(&sc->sc_dev, "unable to allocate ring buffer for tty %d\n", port); 345 return; 346 } 347 p->p_ebuf = p->p_rbuf + (cdtty_rbuf_size << 1); 348 349 tty_attach(p->p_tty); 350 } 351 352 /* 353 * cdtty_shutdown: called when the device is last closed. 354 */ 355 void 356 cdtty_shutdown(sc, p) 357 struct cd18xx_softc *sc; 358 struct cdtty_port *p; 359 { 360 struct tty *tp = p->p_tty; 361 int s; 362 363 s = splserial(); 364 365 /* If we were asserting flow control, then deassert it. */ 366 SET(p->p_rx_flags, RX_IBUF_BLOCKED); 367 cdtty_hwiflow(sc, p); 368 369 /* Clear any break condition set with TIOCSBRK. */ 370 cdtty_break(sc, p, 0); 371 372 /* 373 * Hang up if necessary. Wait a bit, so the other side has time to 374 * notice even if we immediately open the port again. 375 * Avoid tsleeping above splhigh(). 376 */ 377 if (ISSET(tp->t_cflag, HUPCL)) { 378 cdtty_modem(sc, p, 0); 379 splx(s); 380 /* XXX tsleep will only timeout */ 381 (void) tsleep(sc, TTIPRI, ttclos, hz); 382 s = splserial(); 383 } 384 385 /* Turn off interrupts. */ 386 p->p_srer = 0; 387 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 388 389 splx(s); 390 } 391 392 /* 393 * cdttyopen: open syscall for cdtty terminals.. 394 */ 395 int 396 cdttyopen(dev, flag, mode, p) 397 dev_t dev; 398 int flag; 399 int mode; 400 struct proc *p; 401 { 402 struct tty *tp; 403 struct cd18xx_softc *sc; 404 struct cdtty_port *port; 405 int channel, instance, s, error; 406 407 channel = CD18XX_CHANNEL(dev); 408 instance = CD18XX_INSTANCE(dev); 409 410 /* ensure instance is valid */ 411 if (instance >= clcd_cd.cd_ndevs) 412 return (ENXIO); 413 414 /* get softc and port */ 415 sc = device_lookup_private(&clcd_cd, instance); 416 if (sc == NULL) 417 return (ENXIO); 418 port = &sc->sc_ports[channel]; 419 if (port == NULL || port->p_rbuf == NULL) 420 return (ENXIO); 421 422 /* kgdb support? maybe later... */ 423 424 tp = port->p_tty; 425 426 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 427 return (EBUSY); 428 429 s = spltty(); 430 431 /* 432 * Do the following iff this is a first open. 433 */ 434 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 435 struct termios t; 436 437 /* set up things in tp as necessary */ 438 tp->t_dev = dev; 439 440 /* 441 * Initialize the termios status to the defaults. Add in the 442 * sticky bits from TIOCSFLAGS. 443 */ 444 t.c_ispeed = 0; 445 t.c_ospeed = TTYDEF_SPEED; 446 t.c_cflag = TTYDEF_CFLAG; 447 448 if (ISSET(port->p_swflags, TIOCFLAG_CLOCAL)) 449 SET(t.c_cflag, CLOCAL); 450 if (ISSET(port->p_swflags, TIOCFLAG_CRTSCTS)) 451 SET(t.c_cflag, CRTSCTS); 452 if (ISSET(port->p_swflags, TIOCFLAG_CDTRCTS)) 453 SET(t.c_cflag, CDTRCTS); 454 if (ISSET(port->p_swflags, TIOCFLAG_MDMBUF)) 455 SET(t.c_cflag, MDMBUF); 456 457 /* Make sure param will see changes. */ 458 tp->t_ospeed = 0; /* XXX set above ignored? */ 459 (void)cdttyparam(tp, &t); 460 461 tp->t_iflag = TTYDEF_IFLAG; 462 tp->t_oflag = TTYDEF_OFLAG; 463 tp->t_lflag = TTYDEF_LFLAG; 464 ttychars(tp); 465 ttsetwater(tp); 466 467 (void)splserial(); 468 469 /* turn on rx and modem interrupts */ 470 cd18xx_set_car(sc, CD18XX_CHANNEL(dev)); 471 SET(port->p_srer, CD18xx_SRER_Rx | 472 CD18xx_SRER_RxSC | 473 CD18xx_SRER_CD); 474 cd18xx_write(sc, CD18xx_SRER, port->p_srer); 475 476 /* always turn on DTR when open */ 477 cdtty_modem(sc, port, 1); 478 479 /* initialise ring buffer */ 480 port->p_rbget = port->p_rbput = port->p_rbuf; 481 port->p_rbavail = cdtty_rbuf_size; 482 CLR(port->p_rx_flags, RX_ANY_BLOCK); 483 cdtty_hwiflow(sc, port); 484 } 485 486 /* drop spl back before going into the line open */ 487 splx(s); 488 489 error = ttyopen(tp, CD18XX_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 490 if (error == 0) 491 error = (*tp->t_linesw->l_open)(dev, tp); 492 493 return (error); 494 } 495 496 /* 497 * cdttyclose: close syscall for cdtty terminals.. 498 */ 499 int 500 cdttyclose(dev, flag, mode, p) 501 dev_t dev; 502 int flag; 503 int mode; 504 struct proc *p; 505 { 506 struct cd18xx_softc *sc; 507 struct cdtty_port *port; 508 struct tty *tp; 509 int channel, instance; 510 511 channel = CD18XX_CHANNEL(dev); 512 instance = CD18XX_INSTANCE(dev); 513 514 /* ensure instance is valid */ 515 if (instance >= clcd_cd.cd_ndevs) 516 return (ENXIO); 517 518 /* get softc and port */ 519 sc = device_lookup_private(&clcd_cd, instance); 520 if (sc == NULL) 521 return (ENXIO); 522 port = &sc->sc_ports[channel]; 523 524 tp = port->p_tty; 525 526 (*tp->t_linesw->l_close)(tp, flag); 527 ttyclose(tp); 528 529 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 530 /* 531 * Although we got a last close, the device may still be in 532 * use; e.g. if this was the dialout node, and there are still 533 * processes waiting for carrier on the non-dialout node. 534 */ 535 cdtty_shutdown(sc, port); 536 } 537 538 return (0); 539 } 540 541 /* 542 * cdttyread: read syscall for cdtty terminals.. 543 */ 544 int 545 cdttyread(dev_t dev, struct uio *uio, int flag) 546 { 547 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(dev)); 548 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 549 struct tty *tp = port->p_tty; 550 551 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 552 } 553 554 /* 555 * cdttywrite: write syscall for cdtty terminals.. 556 */ 557 int 558 cdttywrite(dev_t dev, struct uio *uio, int flag) 559 { 560 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(dev)); 561 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 562 struct tty *tp = port->p_tty; 563 564 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 565 } 566 567 int 568 cdttypoll(dev_t dev, int events, struct proc *p) 569 { 570 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(dev)); 571 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 572 struct tty *tp = port->p_tty; 573 574 return ((*tp->t_linesw->l_poll)(tp, events, p)); 575 } 576 577 /* 578 * cdttytty: return a pointer to our (cdtty) tp. 579 */ 580 struct tty * 581 cdttytty(dev_t dev) 582 { 583 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(dev)); 584 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 585 586 return (port->p_tty); 587 } 588 589 /* 590 * cdttyioctl: ioctl syscall for cdtty terminals.. 591 */ 592 int 593 cdttyioctl(dev_t dev, u_long cmd, void *data, int flag, struct proc *p) 594 { 595 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(dev)); 596 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 597 struct tty *tp = port->p_tty; 598 int error, s; 599 600 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 601 if (error != EPASSTHROUGH) 602 return (error); 603 604 error = ttioctl(tp, cmd, data, flag, p); 605 if (error != EPASSTHROUGH) 606 return (error); 607 608 s = splserial(); 609 610 switch (cmd) { 611 case TIOCSBRK: 612 cdtty_break(sc, port, 1); 613 break; 614 615 case TIOCCBRK: 616 cdtty_break(sc, port, 0); 617 break; 618 619 case TIOCSDTR: 620 cdtty_modem(sc, port, 1); 621 break; 622 623 case TIOCCDTR: 624 cdtty_modem(sc, port, 0); 625 break; 626 627 case TIOCGFLAGS: 628 *(int *)data = port->p_swflags; 629 break; 630 631 case TIOCSFLAGS: 632 error = kauth_authorize_device_tty(l->l_cred, 633 KAUTH_DEVICE_TTY_PRIVSET, tp); 634 if (error) 635 return (error); 636 port->p_swflags = *(int *)data; 637 break; 638 639 case TIOCMSET: 640 case TIOCMBIS: 641 case TIOCMBIC: 642 case TIOCMGET: 643 default: 644 return (EPASSTHROUGH); 645 } 646 647 splx(s); 648 return (0); 649 } 650 651 /* 652 * Start or restart transmission. 653 */ 654 static void 655 cdttystart(struct tty *tp) 656 { 657 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(tp->t_dev)); 658 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 659 int s; 660 661 s = spltty(); 662 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 663 goto out; 664 if (p->p_tx_stopped) 665 goto out; 666 667 if (!ttypull(tp)) 668 goto out; 669 670 /* Grab the first contiguous region of buffer space. */ 671 { 672 u_char *tba; 673 int tbc; 674 675 tba = tp->t_outq.c_cf; 676 tbc = ndqb(&tp->t_outq, 0); 677 678 (void)splserial(); 679 680 p->p_tba = tba; 681 p->p_tbc = tbc; 682 } 683 684 SET(tp->t_state, TS_BUSY); 685 p->p_tx_busy = 1; 686 687 /* turn on tx interrupts */ 688 if ((p->p_srer & CD18xx_SRER_Tx) == 0) { 689 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 690 SET(p->p_srer, CD18xx_SRER_Tx); 691 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 692 } 693 694 /* 695 * Now bail; we can't actually transmit bytes until we're in a 696 * transmit interrupt service routine. 697 */ 698 out: 699 splx(s); 700 return; 701 } 702 703 /* 704 * cdttystop: handing ^S or other stop signals, for a cdtty 705 */ 706 void 707 cdttystop(struct tty *tp, int flag) 708 { 709 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(tp->t_dev)); 710 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 711 int s; 712 713 s = splserial(); 714 if (ISSET(tp->t_state, TS_BUSY)) { 715 /* Stop transmitting at the next chunk. */ 716 p->p_tbc = 0; 717 p->p_heldtbc = 0; 718 if (!ISSET(tp->t_state, TS_TTSTOP)) 719 SET(tp->t_state, TS_FLUSH); 720 } 721 splx(s); 722 } 723 724 /* 725 * load a channel's registers. 726 */ 727 void 728 cdtty_loadchannelregs(sc, p) 729 struct cd18xx_softc *sc; 730 struct cdtty_port *p; 731 { 732 733 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 734 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 735 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active = p->p_msvr); 736 cd18xx_write(sc, CD18xx_COR1, p->p_cor1); 737 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 738 cd18xx_write(sc, CD18xx_COR3, p->p_cor3); 739 /* 740 * COR2 and COR3 change commands are not required here for 741 * the CL-CD1865 but we do them anyway for simplicity. 742 */ 743 cd18xx_write(sc, CD18xx_CCR, CD18xx_CCR_CORCHG | 744 CD18xx_CCR_CORCHG_COR1 | 745 CD18xx_CCR_CORCHG_COR2 | 746 CD18xx_CCR_CORCHG_COR3); 747 cd18xx_write(sc, CD18xx_RBPRH, p->p_rbprh); 748 cd18xx_write(sc, CD18xx_RBPRL, p->p_rbprl); 749 cd18xx_write(sc, CD18xx_TBPRH, p->p_tbprh); 750 cd18xx_write(sc, CD18xx_TBPRL, p->p_tbprl); 751 if (cd18xx_wait_ccr(sc)) { 752 DPRINTF(CDD_INFO, 753 ("%s: cdtty_loadchannelregs ccr wait timed out\n", 754 device_xname(&sc->sc_dev))); 755 } 756 cd18xx_write(sc, CD18xx_CCR, p->p_chanctl); 757 } 758 759 /* 760 * Set tty parameters from termios. 761 * XXX - Should just copy the whole termios after 762 * making sure all the changes could be done. 763 */ 764 static int 765 cdttyparam(struct tty *tp, struct termios *t) 766 { 767 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(tp->t_dev)); 768 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 769 int s; 770 771 /* Check requested parameters. */ 772 if (t->c_ospeed < 0) 773 return (EINVAL); 774 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 775 return (EINVAL); 776 777 /* 778 * For the console, always force CLOCAL and !HUPCL, so that the port 779 * is always active. 780 */ 781 if (ISSET(p->p_swflags, TIOCFLAG_SOFTCAR)) { 782 SET(t->c_cflag, CLOCAL); 783 CLR(t->c_cflag, HUPCL); 784 } 785 786 /* 787 * If there were no changes, don't do anything. This avoids dropping 788 * input and improves performance when all we did was frob things like 789 * VMIN and VTIME. 790 */ 791 if (tp->t_ospeed == t->c_ospeed && 792 tp->t_cflag == t->c_cflag) 793 return (0); 794 795 /* 796 * Block interrupts so that state will not 797 * be altered until we are done setting it up. 798 */ 799 s = splserial(); 800 801 /* 802 * Copy across the size, parity and stop bit info. 803 */ 804 switch (t->c_cflag & CSIZE) { 805 case CS5: 806 p->p_cor1 = CD18xx_COR1_CS5; 807 break; 808 case CS6: 809 p->p_cor1 = CD18xx_COR1_CS6; 810 break; 811 case CS7: 812 p->p_cor1 = CD18xx_COR1_CS7; 813 break; 814 default: 815 p->p_cor1 = CD18xx_COR1_CS8; 816 break; 817 } 818 if (ISSET(t->c_cflag, PARENB)) { 819 SET(p->p_cor1, CD18xx_COR1_PARITY_NORMAL); 820 if (ISSET(t->c_cflag, PARODD)) 821 SET(p->p_cor1, CD18xx_COR1_PARITY_ODD); 822 } 823 if (!ISSET(t->c_iflag, INPCK)) 824 SET(p->p_cor1, CD18xx_COR1_IGNORE); 825 if (ISSET(t->c_cflag, CSTOPB)) 826 SET(p->p_cor1, CD18xx_COR1_STOPBIT_2); 827 828 /* 829 * If we're not in a mode that assumes a connection is present, then 830 * ignore carrier changes. 831 */ 832 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 833 p->p_msvr_dcd = 0; 834 else 835 p->p_msvr_dcd = CD18xx_MSVR_CD; 836 837 /* 838 * Set the flow control pins depending on the current flow control 839 * mode. 840 */ 841 if (ISSET(t->c_cflag, CRTSCTS)) { 842 p->p_mcor1_dtr = CD18xx_MCOR1_DTR; 843 p->p_msvr_rts = CD18xx_MSVR_RTS; 844 p->p_msvr_cts = CD18xx_MSVR_CTS; 845 p->p_cor2 = CD18xx_COR2_RTSAOE|CD18xx_COR2_CTSAE; 846 } else if (ISSET(t->c_cflag, MDMBUF)) { 847 /* 848 * For DTR/DCD flow control, make sure we don't toggle DTR for 849 * carrier detection. 850 */ 851 p->p_mcor1_dtr = 0; 852 p->p_msvr_rts = CD18xx_MSVR_DTR; 853 p->p_msvr_cts = CD18xx_MSVR_CD; 854 p->p_cor2 = 0; 855 } else { 856 /* 857 * If no flow control, then always set RTS. This will make 858 * the other side happy if it mistakenly thinks we're doing 859 * RTS/CTS flow control. 860 */ 861 p->p_mcor1_dtr = CD18xx_MSVR_DTR; 862 p->p_msvr_rts = 0; 863 p->p_msvr_cts = 0; 864 p->p_cor2 = 0; 865 } 866 p->p_msvr_mask = p->p_msvr_cts | p->p_msvr_dcd; 867 868 /* 869 * Set the FIFO threshold based on the receive speed. 870 * 871 * * If it's a low speed, it's probably a mouse or some other 872 * interactive device, so set the threshold low. 873 * * If it's a high speed, trim the trigger level down to prevent 874 * overflows. 875 * * Otherwise set it a bit higher. 876 */ 877 p->p_cor3 = (t->c_ospeed <= 1200 ? 1 : t->c_ospeed <= 38400 ? 8 : 4); 878 879 #define PORT_RATE(o, s) \ 880 (((((o) + (s)/2) / (s)) + CD18xx_xBRPR_TPC/2) / CD18xx_xBRPR_TPC) 881 /* Compute BPS for the requested speeds */ 882 if (t->c_ospeed) { 883 u_int32_t tbpr = PORT_RATE(sc->sc_osc, t->c_ospeed); 884 885 if (tbpr == 0 || tbpr > 0xffff) 886 return (EINVAL); 887 888 p->p_tbprh = tbpr >> 8; 889 p->p_tbprl = tbpr & 0xff; 890 } 891 892 if (t->c_ispeed) { 893 u_int32_t rbpr = PORT_RATE(sc->sc_osc, t->c_ispeed); 894 895 if (rbpr == 0 || rbpr > 0xffff) 896 return (EINVAL); 897 898 p->p_rbprh = rbpr >> 8; 899 p->p_rbprl = rbpr & 0xff; 900 } 901 902 /* And copy to tty. */ 903 tp->t_ispeed = 0; 904 tp->t_ospeed = t->c_ospeed; 905 tp->t_cflag = t->c_cflag; 906 907 if (!p->p_heldchange) { 908 if (p->p_tx_busy) { 909 p->p_heldtbc = p->p_tbc; 910 p->p_tbc = 0; 911 p->p_heldchange = 1; 912 } else 913 cdtty_loadchannelregs(sc, p); 914 } 915 916 if (!ISSET(t->c_cflag, CHWFLOW)) { 917 /* Disable the high water mark. */ 918 p->p_r_hiwat = 0; 919 p->p_r_lowat = 0; 920 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 921 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 922 softint_schedule(sc->sc_si); 923 } 924 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 925 CLR(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 926 cdtty_hwiflow(sc, p); 927 } 928 } else { 929 p->p_r_hiwat = cdtty_rbuf_hiwat; 930 p->p_r_lowat = cdtty_rbuf_lowat; 931 } 932 933 splx(s); 934 935 /* 936 * Update the tty layer's idea of the carrier bit, in case we changed 937 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 938 * explicit request. 939 */ 940 (void) (*tp->t_linesw->l_modem)(tp, ISSET(p->p_msvr, CD18xx_MSVR_CD)); 941 942 if (!ISSET(t->c_cflag, CHWFLOW)) { 943 if (p->p_tx_stopped) { 944 p->p_tx_stopped = 0; 945 cdttystart(tp); 946 } 947 } 948 949 return (0); 950 } 951 952 static void 953 cdtty_break(sc, p, onoff) 954 struct cd18xx_softc *sc; 955 struct cdtty_port *p; 956 int onoff; 957 { 958 959 /* tell tx intr handler we need a break */ 960 p->p_needbreak = !!onoff; 961 962 /* turn on tx interrupts if break has changed */ 963 if (p->p_needbreak != p->p_break) 964 SET(p->p_srer, CD18xx_SRER_Tx); 965 966 if (!p->p_heldchange) { 967 if (p->p_tx_busy) { 968 p->p_heldtbc = p->p_tbc; 969 p->p_tbc = 0; 970 p->p_heldchange = 1; 971 } else 972 cdtty_loadchannelregs(sc, p); 973 } 974 } 975 976 /* 977 * Raise or lower modem control (DTR/RTS) signals. If a character is 978 * in transmission, the change is deferred. 979 */ 980 static void 981 cdtty_modem(sc, p, onoff) 982 struct cd18xx_softc *sc; 983 struct cdtty_port *p; 984 int onoff; 985 { 986 987 if (p->p_mcor1_dtr == 0) 988 return; 989 990 if (onoff) 991 CLR(p->p_mcor1, p->p_mcor1_dtr); 992 else 993 SET(p->p_mcor1, p->p_mcor1_dtr); 994 995 if (!p->p_heldchange) { 996 if (p->p_tx_busy) { 997 p->p_heldtbc = p->p_tbc; 998 p->p_tbc = 0; 999 p->p_heldchange = 1; 1000 } else 1001 cdtty_loadchannelregs(sc, p); 1002 } 1003 } 1004 1005 /* 1006 * Try to block or unblock input using hardware flow-control. 1007 * This is called by kern/tty.c if MDMBUF|CRTSCTS is set, and 1008 * if this function returns non-zero, the TS_TBLOCK flag will 1009 * be set or cleared according to the "block" arg passed. 1010 */ 1011 int 1012 cdttyhwiflow(struct tty *tp, int block) 1013 { 1014 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, CD18XX_INSTANCE(tp->t_dev)); 1015 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 1016 int s; 1017 1018 if (p->p_msvr_rts == 0) 1019 return (0); 1020 1021 s = splserial(); 1022 if (block) { 1023 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1024 SET(p->p_rx_flags, RX_TTY_BLOCKED); 1025 cdtty_hwiflow(sc, p); 1026 } 1027 } else { 1028 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1029 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 1030 softint_schedule(sc->sc_si); 1031 } 1032 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1033 CLR(p->p_rx_flags, RX_TTY_BLOCKED); 1034 cdtty_hwiflow(sc, p); 1035 } 1036 } 1037 splx(s); 1038 return (1); 1039 } 1040 1041 /* 1042 * Internal version of cdttyhwiflow, called at cdtty's priority. 1043 */ 1044 static void 1045 cdtty_hwiflow(sc, p) 1046 struct cd18xx_softc *sc; 1047 struct cdtty_port *p; 1048 { 1049 1050 if (p->p_msvr_rts == 0) 1051 return; 1052 1053 if (ISSET(p->p_rx_flags, RX_ANY_BLOCK)) { 1054 CLR(p->p_msvr, p->p_msvr_rts); 1055 CLR(p->p_msvr_active, p->p_msvr_rts); 1056 } else { 1057 SET(p->p_msvr, p->p_msvr_rts); 1058 SET(p->p_msvr_active, p->p_msvr_rts); 1059 } 1060 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 1061 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active); 1062 } 1063 1064 /* 1065 * indiviual interrupt routines. 1066 */ 1067 1068 /* 1069 * this is the number of interrupts allowed, total. set it to 0 1070 * to allow unlimited interrpts 1071 */ 1072 #define INTR_MAX_ALLOWED 0 1073 1074 #if INTR_MAX_ALLOWED == 0 1075 #define GOTINTR(sc, p) /* nothing */ 1076 #else 1077 int intrcount; 1078 #define GOTINTR(sc, p) \ 1079 do { \ 1080 if (intrcount++ == INTR_MAX_ALLOWED) { \ 1081 CLR(p->p_srer, CD18xx_SRER_Tx); \ 1082 cd18xx_write(sc, CD18xx_SRER, p->p_srer); \ 1083 } \ 1084 DPRINTF(CDD_INTR, (", intrcount %d srer %x", intrcount, p->p_srer)); \ 1085 } while (0) 1086 #endif 1087 1088 /* receiver interrupt */ 1089 static inline void 1090 cd18xx_rint(sc, ns) 1091 struct cd18xx_softc *sc; 1092 int *ns; 1093 { 1094 struct cdtty_port *p; 1095 u_int channel, count; 1096 u_char *put, *end; 1097 u_int cc; 1098 1099 /* work out the channel and softc */ 1100 channel = cd18xx_get_gscr1_channel(sc); 1101 p = &sc->sc_ports[channel]; 1102 DPRINTF(CDD_INTR, ("%s: rint: channel %d", device_xname(&sc->sc_dev), channel)); 1103 GOTINTR(sc, p); 1104 1105 end = p->p_ebuf; 1106 put = p->p_rbput; 1107 cc = p->p_rbavail; 1108 1109 /* read as many bytes as necessary */ 1110 count = cd18xx_read(sc, CD18xx_RDCR); 1111 DPRINTF(CDD_INTR, (", %d bytes available: ", count)); 1112 1113 while (cc > 0 && count > 0) { 1114 u_char rcsr = cd18xx_read(sc, CD18xx_RCSR); 1115 1116 put[0] = cd18xx_read(sc, CD18xx_RDR); 1117 put[1] = rcsr; 1118 1119 if (rcsr) 1120 *ns = 1; 1121 1122 put += 2; 1123 if (put >= end) 1124 put = p->p_rbuf; 1125 1126 DPRINTF(CDD_INTR, (".")); 1127 cc--; 1128 count--; 1129 } 1130 1131 DPRINTF(CDD_INTR, (" finished reading")); 1132 1133 /* 1134 * Current string of incoming characters ended because 1135 * no more data was available or we ran out of space. 1136 * If we're out of space, turn off receive interrupts. 1137 */ 1138 p->p_rbput = put; 1139 p->p_rbavail = cc; 1140 if (!ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1141 p->p_rx_ready = 1; 1142 } 1143 1144 /* 1145 * If we're out of space, disable receive interrupts 1146 * until the queue has drained a bit. 1147 */ 1148 if (!cc) { 1149 SET(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1150 CLR(p->p_srer, CD18xx_SRER_Rx | 1151 CD18xx_SRER_RxSC | 1152 CD18xx_SRER_CD); 1153 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1154 } 1155 1156 /* finish the interrupt transaction with the IC */ 1157 cd18xx_write(sc, CD18xx_EOSRR, 0); 1158 DPRINTF(CDD_INTR, (", done\n")); 1159 } 1160 1161 /* 1162 * transmitter interrupt 1163 * 1164 * note this relys on the fact that we allow the transmitter FIFO to 1165 * drain completely 1166 */ 1167 static inline void 1168 cd18xx_tint(sc, ns) 1169 struct cd18xx_softc *sc; 1170 int *ns; 1171 { 1172 struct cdtty_port *p; 1173 u_int channel; 1174 1175 /* work out the channel and softc */ 1176 channel = cd18xx_get_gscr1_channel(sc); 1177 p = &sc->sc_ports[channel]; 1178 DPRINTF(CDD_INTR, ("%s: tint: channel %d", device_xname(&sc->sc_dev), 1179 channel)); 1180 GOTINTR(sc, p); 1181 1182 /* if the current break condition is wrong, fix it */ 1183 if (p->p_break != p->p_needbreak) { 1184 u_char buf[2]; 1185 1186 DPRINTF(CDD_INTR, (", changing break to %d", p->p_needbreak)); 1187 1188 /* turn on ETC processing */ 1189 cd18xx_write(sc, CD18xx_COR2, p->p_cor2 | CD18xx_COR2_ETC); 1190 1191 buf[0] = CD18xx_TDR_ETC_BYTE; 1192 buf[1] = p->p_needbreak ? CD18xx_TDR_BREAK_BYTE : 1193 CD18xx_TDR_NOBREAK_BYTE; 1194 cd18xx_write_multi(sc, CD18xx_TDR, buf, 2); 1195 1196 p->p_break = p->p_needbreak; 1197 1198 /* turn off ETC processing */ 1199 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 1200 } 1201 1202 /* 1203 * If we've delayed a parameter change, do it now, and restart 1204 * output. 1205 */ 1206 if (p->p_heldchange) { 1207 cdtty_loadchannelregs(sc, p); 1208 p->p_heldchange = 0; 1209 p->p_tbc = p->p_heldtbc; 1210 p->p_heldtbc = 0; 1211 } 1212 1213 /* Output the next chunk of the contiguous buffer, if any. */ 1214 if (p->p_tbc > 0) { 1215 int n; 1216 1217 n = p->p_tbc; 1218 if (n > 8) /* write up to 8 entries */ 1219 n = 8; 1220 DPRINTF(CDD_INTR, (", writing %d bytes to TDR", n)); 1221 cd18xx_write_multi(sc, CD18xx_TDR, p->p_tba, n); 1222 p->p_tbc -= n; 1223 p->p_tba += n; 1224 } 1225 1226 /* Disable transmit completion interrupts if we ran out of bytes. */ 1227 if (p->p_tbc == 0) { 1228 /* Note that Tx interrupts should already be enabled */ 1229 if (ISSET(p->p_srer, CD18xx_SRER_Tx)) { 1230 DPRINTF(CDD_INTR, (", disabling tx interrupts")); 1231 CLR(p->p_srer, CD18xx_SRER_Tx); 1232 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1233 } 1234 if (p->p_tx_busy) { 1235 p->p_tx_busy = 0; 1236 p->p_tx_done = 1; 1237 } 1238 } 1239 *ns = 1; 1240 1241 /* finish the interrupt transaction with the IC */ 1242 cd18xx_write(sc, CD18xx_EOSRR, 0); 1243 DPRINTF(CDD_INTR, (", done\n")); 1244 } 1245 1246 /* modem signal change interrupt */ 1247 static inline void 1248 cd18xx_mint(sc, ns) 1249 struct cd18xx_softc *sc; 1250 int *ns; 1251 { 1252 struct cdtty_port *p; 1253 u_int channel; 1254 u_char msvr, delta; 1255 1256 /* work out the channel and softc */ 1257 channel = cd18xx_get_gscr1_channel(sc); 1258 p = &sc->sc_ports[channel]; 1259 DPRINTF(CDD_INTR, ("%s: mint: channel %d", device_xname(&sc->sc_dev), channel)); 1260 GOTINTR(sc, p); 1261 1262 /* 1263 * We ignore the MCR register, and handle detecting deltas 1264 * via software, like many other serial drivers. 1265 */ 1266 msvr = cd18xx_read(sc, CD18xx_MSVR); 1267 delta = msvr ^ p->p_msvr; 1268 DPRINTF(CDD_INTR, (", msvr %d", msvr)); 1269 1270 /* 1271 * Process normal status changes 1272 */ 1273 if (ISSET(delta, p->p_msvr_mask)) { 1274 SET(p->p_msvr_delta, delta); 1275 1276 DPRINTF(CDD_INTR, (", status changed delta %d", delta)); 1277 /* 1278 * Stop output immediately if we lose the output 1279 * flow control signal or carrier detect. 1280 */ 1281 if (ISSET(~msvr, p->p_msvr_mask)) { 1282 p->p_tbc = 0; 1283 p->p_heldtbc = 0; 1284 /* Stop modem interrupt processing */ 1285 } 1286 p->p_st_check = 1; 1287 *ns = 1; 1288 } 1289 1290 /* reset the modem signal register */ 1291 cd18xx_write(sc, CD18xx_MCR, 0); 1292 1293 /* finish the interrupt transaction with the IC */ 1294 cd18xx_write(sc, CD18xx_EOSRR, 0); 1295 DPRINTF(CDD_INTR, (", done\n")); 1296 } 1297 1298 /* 1299 * hardware interrupt routine. call the relevant interrupt routines until 1300 * no interrupts are pending. 1301 * 1302 * note: we do receive interrupts before all others (as we'd rather lose 1303 * a chance to transmit, than lose a character). and we do transmit 1304 * interrupts before modem interrupts. 1305 * 1306 * we have to traverse all of the cd18xx's attached, unfortunately. 1307 */ 1308 int 1309 cd18xx_hardintr(void *v) 1310 { 1311 int i, rv = 0; 1312 u_char ack; 1313 1314 DPRINTF(CDD_INTR, ("cd18xx_hardintr (ndevs %d):\n", clcd_cd.cd_ndevs)); 1315 for (i = 0; i < clcd_cd.cd_ndevs; i++) 1316 { 1317 struct cd18xx_softc *sc = device_lookup_private(&clcd_cd, i); 1318 int status, ns = 0; 1319 int count = 1; /* process only 1 interrupts at a time for now */ 1320 1321 if (sc == NULL) 1322 continue; 1323 1324 DPRINTF(CDD_INTR, ("%s:", device_xname(&sc->sc_dev))); 1325 while (count-- && 1326 (status = (cd18xx_read(sc, CD18xx_SRSR) & 1327 CD18xx_SRSR_PENDING))) { 1328 rv = 1; 1329 1330 DPRINTF(CDD_INTR, (" status %x:", status)); 1331 if (ISSET(status, CD18xx_SRSR_RxPEND)) { 1332 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1333 CD18xx_INTRACK_RxINT); 1334 DPRINTF(CDD_INTR, (" rx: ack1 %x\n", ack)); 1335 cd18xx_rint(sc, &ns); 1336 } 1337 if (ISSET(status, CD18xx_SRSR_TxPEND)) { 1338 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1339 CD18xx_INTRACK_TxINT); 1340 DPRINTF(CDD_INTR, (" tx: ack1 %x\n", ack)); 1341 cd18xx_tint(sc, &ns); 1342 1343 } 1344 if (ISSET(status, CD18xx_SRSR_MxPEND)) { 1345 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1346 CD18xx_INTRACK_MxINT); 1347 DPRINTF(CDD_INTR, (" mx: ack1 %x\n", ack)); 1348 cd18xx_mint(sc, &ns); 1349 } 1350 } 1351 if (ns) 1352 softint_schedule(sc->sc_si); 1353 } 1354 1355 return (rv); 1356 } 1357 1358 /* 1359 * software interrupt 1360 */ 1361 1362 void 1363 cdtty_rxsoft(sc, p, tp) 1364 struct cd18xx_softc *sc; 1365 struct cdtty_port *p; 1366 struct tty *tp; 1367 { 1368 u_char *get, *end; 1369 u_int cc, scc; 1370 u_char rcsr; 1371 int code; 1372 int s; 1373 1374 end = p->p_ebuf; 1375 get = p->p_rbget; 1376 scc = cc = cdtty_rbuf_size - p->p_rbavail; 1377 1378 if (cc == cdtty_rbuf_size) { 1379 p->p_floods++; 1380 #if 0 1381 if (p->p_errors++ == 0) 1382 callout_reset(&p->p_diag_callout, 60 * hz, 1383 cdttydiag, p); 1384 #endif 1385 } 1386 1387 while (cc) { 1388 code = get[0]; 1389 rcsr = get[1]; 1390 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR | CD18xx_RCSR_BREAK | 1391 CD18xx_RCSR_FRAMERR | CD18xx_RCSR_PARITYERR)) { 1392 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR)) { 1393 p->p_overflows++; 1394 #if 0 1395 if (p->p_errors++ == 0) 1396 callout_reset(&p->p_diag_callout, 1397 60 * hz, cdttydiag, p); 1398 #endif 1399 } 1400 if (ISSET(rcsr, CD18xx_RCSR_BREAK|CD18xx_RCSR_FRAMERR)) 1401 SET(code, TTY_FE); 1402 if (ISSET(rcsr, CD18xx_RCSR_PARITYERR)) 1403 SET(code, TTY_PE); 1404 } 1405 if ((*tp->t_linesw->l_rint)(code, tp) == -1) { 1406 /* 1407 * The line discipline's buffer is out of space. 1408 */ 1409 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1410 /* 1411 * We're either not using flow control, or the 1412 * line discipline didn't tell us to block for 1413 * some reason. Either way, we have no way to 1414 * know when there's more space available, so 1415 * just drop the rest of the data. 1416 */ 1417 get += cc << 1; 1418 if (get >= end) 1419 get -= cdtty_rbuf_size << 1; 1420 cc = 0; 1421 } else { 1422 /* 1423 * Don't schedule any more receive processing 1424 * until the line discipline tells us there's 1425 * space available (through cdttyhwiflow()). 1426 * Leave the rest of the data in the input 1427 * buffer. 1428 */ 1429 SET(p->p_rx_flags, RX_TTY_OVERFLOWED); 1430 } 1431 break; 1432 } 1433 get += 2; 1434 if (get >= end) 1435 get = p->p_rbuf; 1436 cc--; 1437 } 1438 1439 if (cc != scc) { 1440 p->p_rbget = get; 1441 s = splserial(); 1442 1443 cc = p->p_rbavail += scc - cc; 1444 /* Buffers should be ok again, release possible block. */ 1445 if (cc >= p->p_r_lowat) { 1446 if (ISSET(p->p_rx_flags, RX_IBUF_OVERFLOWED)) { 1447 CLR(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1448 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 1449 SET(p->p_srer, CD18xx_SRER_Rx | 1450 CD18xx_SRER_RxSC | 1451 CD18xx_SRER_CD); 1452 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1453 } 1454 if (ISSET(p->p_rx_flags, RX_IBUF_BLOCKED)) { 1455 CLR(p->p_rx_flags, RX_IBUF_BLOCKED); 1456 cdtty_hwiflow(sc, p); 1457 } 1458 } 1459 splx(s); 1460 } 1461 } 1462 1463 void 1464 cdtty_txsoft(sc, p, tp) 1465 struct cd18xx_softc *sc; 1466 struct cdtty_port *p; 1467 struct tty *tp; 1468 { 1469 1470 CLR(tp->t_state, TS_BUSY); 1471 if (ISSET(tp->t_state, TS_FLUSH)) 1472 CLR(tp->t_state, TS_FLUSH); 1473 else 1474 ndflush(&tp->t_outq, (int)(p->p_tba - tp->t_outq.c_cf)); 1475 (*tp->t_linesw->l_start)(tp); 1476 } 1477 1478 void 1479 cdtty_stsoft(sc, p, tp) 1480 struct cd18xx_softc *sc; 1481 struct cdtty_port *p; 1482 struct tty *tp; 1483 { 1484 u_char msvr, delta; 1485 int s; 1486 1487 s = splserial(); 1488 msvr = p->p_msvr; 1489 delta = p->p_msvr_delta; 1490 p->p_msvr_delta = 0; 1491 splx(s); 1492 1493 if (ISSET(delta, p->p_msvr_dcd)) { 1494 /* 1495 * Inform the tty layer that carrier detect changed. 1496 */ 1497 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msvr, CD18xx_MSVR_CD)); 1498 } 1499 1500 if (ISSET(delta, p->p_msvr_cts)) { 1501 /* Block or unblock output according to flow control. */ 1502 if (ISSET(msvr, p->p_msvr_cts)) { 1503 p->p_tx_stopped = 0; 1504 (*tp->t_linesw->l_start)(tp); 1505 } else { 1506 p->p_tx_stopped = 1; 1507 } 1508 } 1509 } 1510 1511 void 1512 cd18xx_softintr(v) 1513 void *v; 1514 { 1515 struct cd18xx_softc *sc = v; 1516 struct cdtty_port *p; 1517 struct tty *tp; 1518 int i; 1519 1520 for (i = 0; i < 8; i++) { 1521 p = &sc->sc_ports[i]; 1522 1523 tp = p->p_tty; 1524 if (tp == NULL) 1525 continue; 1526 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1527 continue; 1528 1529 if (p->p_rx_ready) { 1530 p->p_rx_ready = 0; 1531 cdtty_rxsoft(sc, p, tp); 1532 } 1533 1534 if (p->p_st_check) { 1535 p->p_st_check = 0; 1536 cdtty_stsoft(sc, p, tp); 1537 } 1538 1539 if (p->p_tx_done) { 1540 p->p_tx_done = 0; 1541 cdtty_txsoft(sc, p, tp); 1542 } 1543 } 1544 }
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