cd18xx.c revision 1.15
1 /* $NetBSD: cd18xx.c,v 1.15 2006/06/08 21:04:16 simonb 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. Neither the name of the University nor the names of its contributors 80 * may be used to endorse or promote products derived from this software 81 * without specific prior written permission. 82 * 83 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 84 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 85 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 86 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 87 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 88 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 89 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 90 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 91 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 92 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 93 * SUCH DAMAGE. 94 * 95 * @(#)com.c 7.5 (Berkeley) 5/16/91 96 */ 97 98 /* 99 * cirrus logic CL-CD180/CD1864/CD1865 driver, based in (large) parts on 100 * the com and z8530 drivers. thanks charles. 101 */ 102 103 #include <sys/cdefs.h> 104 __KERNEL_RCSID(0, "$NetBSD: cd18xx.c,v 1.15 2006/06/08 21:04:16 simonb Exp $"); 105 106 #include <sys/param.h> 107 #include <sys/conf.h> 108 #include <sys/device.h> 109 #include <sys/systm.h> 110 #include <sys/malloc.h> 111 #include <sys/proc.h> 112 #include <sys/kernel.h> 113 #include <sys/tty.h> 114 #include <sys/fcntl.h> 115 #include <sys/kauth.h> 116 117 #include <machine/bus.h> 118 119 #include <dev/ic/cd18xxvar.h> 120 #include <dev/ic/cd18xxreg.h> 121 122 #include "ioconf.h" 123 124 /* 125 * some helpers 126 */ 127 128 /* macros to clear/set/test flags. */ 129 #define SET(t, f) (t) |= (f) 130 #define CLR(t, f) (t) &= ~(f) 131 #define ISSET(t, f) ((t) & (f)) 132 133 static void cdtty_attach(struct cd18xx_softc *, int); 134 135 static inline void cd18xx_rint(struct cd18xx_softc *, int *); 136 static inline void cd18xx_tint(struct cd18xx_softc *, int *); 137 static inline void cd18xx_mint(struct cd18xx_softc *, int *); 138 139 void cdtty_rxsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 140 void cdtty_txsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 141 void cdtty_stsoft(struct cd18xx_softc *, struct cdtty_port *, struct tty *); 142 void cd18xx_softintr(void *); 143 144 dev_type_open(cdttyopen); 145 dev_type_close(cdttyclose); 146 dev_type_read(cdttyread); 147 dev_type_write(cdttywrite); 148 dev_type_ioctl(cdttyioctl); 149 dev_type_stop(cdttystop); 150 dev_type_tty(cdttytty); 151 dev_type_poll(cdttypoll); 152 153 const struct cdevsw cdtty_cdevsw = { 154 cdttyopen, cdttyclose, cdttyread, cdttywrite, cdttyioctl, 155 cdttystop, cdttytty, cdttypoll, nommap, ttykqfilter, D_TTY 156 }; 157 158 static void cdtty_shutdown(struct cd18xx_softc *, struct cdtty_port *); 159 static void cdttystart(struct tty *); 160 static int cdttyparam(struct tty *, struct termios *); 161 static void cdtty_break(struct cd18xx_softc *, struct cdtty_port *, int); 162 static void cdtty_modem(struct cd18xx_softc *, struct cdtty_port *, int); 163 static int cdttyhwiflow(struct tty *, int); 164 static void cdtty_hwiflow(struct cd18xx_softc *, struct cdtty_port *); 165 166 static void cdtty_loadchannelregs(struct cd18xx_softc *, 167 struct cdtty_port *); 168 169 /* default read buffer size */ 170 u_int cdtty_rbuf_size = CDTTY_RING_SIZE; 171 172 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 173 u_int cdtty_rbuf_hiwat = (CDTTY_RING_SIZE * 1) / 4; 174 u_int cdtty_rbuf_lowat = (CDTTY_RING_SIZE * 3) / 4; 175 176 #define CD18XXDEBUG 177 #ifdef CD18XXDEBUG 178 #define CDD_INFO 0x0001 179 #define CDD_INTR 0x0002 180 int cd18xx_debug = CDD_INTR|CDD_INFO; 181 # define DPRINTF(l, x) if (cd18xx_debug & l) printf x 182 #else 183 # define DPRINTF(l, x) /* nothing */ 184 #endif 185 186 /* Known supported revisions. */ 187 struct cd18xx_revs { 188 u_char revision; 189 u_char onehundred_pin; 190 char *name; 191 } cd18xx_revs[] = { 192 { CD180_GFRCR_REV_B, 0, "CL-CD180 rev. B" }, 193 { CD180_GFRCR_REV_C, 0, "CL-CD180 rev. C" }, 194 { CD1864_GFRCR_REVISION_A, 1, "CL-CD1864 rev. A" }, 195 { CD1865_GFRCR_REVISION_A, 1, "CL-CD1865 rev. A" }, 196 { CD1865_GFRCR_REVISION_B, 1, "CL-CD1865 rev. B" }, 197 { CD1865_GFRCR_REVISION_C, 1, "CL-CD1865 rev. C" }, 198 { 0, 0, 0 } 199 }; 200 201 /* wait for the CCR to go to zero */ 202 static inline int cd18xx_wait_ccr(struct cd18xx_softc *); 203 static inline int 204 cd18xx_wait_ccr(sc) 205 struct cd18xx_softc *sc; 206 { 207 int i = 100000; 208 209 while (--i && 210 bus_space_read_1(sc->sc_tag, sc->sc_handle, CD18xx_CCR) != 0) 211 ; 212 return (i == 0); 213 } 214 215 /* 216 * device attach routine, high-end portion 217 */ 218 void 219 cd18xx_attach(sc) 220 struct cd18xx_softc *sc; 221 { 222 static int chip_id_next = 1; 223 int onehundred_pin, revision, i, port; 224 225 /* read and print the revision */ 226 revision = cd18xx_read(sc, CD18xx_GFRCR); 227 onehundred_pin = ISSET(cd18xx_read(sc, CD18xx_SRCR),CD18xx_SRCR_PKGTYP); 228 for (i = 0; cd18xx_revs[i].name; i++) 229 if (revision == cd18xx_revs[i].revision || 230 onehundred_pin == cd18xx_revs[i].onehundred_pin) { 231 printf(": %s", cd18xx_revs[i].name); 232 break; 233 } 234 235 if (cd18xx_revs[i].name == NULL) { 236 printf("%s: unknown revision, bailing.\n", sc->sc_dev.dv_xname); 237 return; 238 } 239 240 /* prepare for reset */ 241 cd18xx_set_car(sc, 0); 242 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_CLEAR); 243 244 /* wait for CCR to go to zero */ 245 if (cd18xx_wait_ccr(sc)) { 246 printf("cd18xx_attach: reset change command timed out\n"); 247 return; 248 } 249 250 /* full reset of all channels */ 251 cd18xx_write(sc, CD18xx_CCR, 252 CD18xx_CCR_RESET|CD18xx_CCR_RESET_HARD); 253 254 /* loop until the GSVR is ready */ 255 i = 100000; 256 while (--i && cd18xx_read(sc, CD18xx_GSVR) == CD18xx_GSVR_READY) 257 ; 258 if (i == 0) { 259 printf("\n%s: did not reset!\n", sc->sc_dev.dv_xname); 260 return; 261 } 262 263 /* write the chip_id */ 264 sc->sc_chip_id = chip_id_next++; 265 #ifdef DIAGNOSTIC 266 if (sc->sc_chip_id > 31) 267 panic("more than 31 cd18xx's? help."); 268 #endif 269 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_SETID(sc)); 270 271 /* rx/tx/modem service match vectors, initalised by higher level */ 272 cd18xx_write(sc, CD18xx_MSMR, sc->sc_msmr | 0x80); 273 cd18xx_write(sc, CD18xx_TSMR, sc->sc_tsmr | 0x80); 274 cd18xx_write(sc, CD18xx_RSMR, sc->sc_rsmr | 0x80); 275 276 printf(", gsvr %x msmr %x tsmr %x rsmr %x", 277 cd18xx_read(sc, CD18xx_GSVR), 278 cd18xx_read(sc, CD18xx_MSMR), 279 cd18xx_read(sc, CD18xx_TSMR), 280 cd18xx_read(sc, CD18xx_RSMR)); 281 282 /* prescale registers */ 283 sc->sc_pprh = 0xf0; 284 sc->sc_pprl = 0; 285 cd18xx_write(sc, CD18xx_PPRH, sc->sc_pprh); 286 cd18xx_write(sc, CD18xx_PPRL, sc->sc_pprl); 287 288 /* establish our soft interrupt. */ 289 sc->sc_si = softintr_establish(IPL_SOFTSERIAL, cd18xx_softintr, sc); 290 291 printf(", 8 ports ready (chip id %d)\n", sc->sc_chip_id); 292 293 /* 294 * finally, we loop over all 8 channels initialising them 295 */ 296 for (port = 0; port < 8; port++) 297 cdtty_attach(sc, port); 298 } 299 300 /* tty portion of the code */ 301 302 /* 303 * tty portion attach routine 304 */ 305 void 306 cdtty_attach(sc, port) 307 struct cd18xx_softc *sc; 308 int port; 309 { 310 struct cdtty_port *p = &sc->sc_ports[port]; 311 int i; 312 313 /* load CAR with channel number */ 314 cd18xx_set_car(sc, port); 315 316 /* wait for CCR to go to zero */ 317 if (cd18xx_wait_ccr(sc)) { 318 printf("cd18xx_attach: change command timed out setting " 319 "CAR for port %d\n", i); 320 return; 321 } 322 323 /* set the RPTR to (arbitrary) 8 */ 324 cd18xx_write(sc, CD18xx_RTPR, 8); 325 326 /* reset the modem signal value register */ 327 sc->sc_ports[port].p_msvr = CD18xx_MSVR_RESET; 328 329 /* zero the service request enable register */ 330 cd18xx_write(sc, CD18xx_SRER, 0); 331 332 /* enable the transmitter & receiver */ 333 SET(p->p_chanctl, CD18xx_CCR_CHANCTL | 334 CD18xx_CCR_CHANCTL_TxEN | 335 CD18xx_CCR_CHANCTL_RxEN); 336 337 /* XXX no console or kgdb support yet! */ 338 339 /* get a tty structure */ 340 p->p_tty = ttymalloc(); 341 p->p_tty->t_oproc = cdttystart; 342 p->p_tty->t_param = cdttyparam; 343 p->p_tty->t_hwiflow = cdttyhwiflow; 344 345 p->p_rbuf = malloc(cdtty_rbuf_size << 1, M_DEVBUF, M_WAITOK); 346 p->p_rbput = p->p_rbget = p->p_rbuf; 347 p->p_rbavail = cdtty_rbuf_size; 348 if (p->p_rbuf == NULL) { 349 printf("%s: unable to allocate ring buffer for tty %d\n", 350 sc->sc_dev.dv_xname, port); 351 return; 352 } 353 p->p_ebuf = p->p_rbuf + (cdtty_rbuf_size << 1); 354 355 tty_attach(p->p_tty); 356 } 357 358 /* 359 * cdtty_shutdown: called when the device is last closed. 360 */ 361 void 362 cdtty_shutdown(sc, p) 363 struct cd18xx_softc *sc; 364 struct cdtty_port *p; 365 { 366 struct tty *tp = p->p_tty; 367 int s; 368 369 s = splserial(); 370 371 /* If we were asserting flow control, then deassert it. */ 372 SET(p->p_rx_flags, RX_IBUF_BLOCKED); 373 cdtty_hwiflow(sc, p); 374 375 /* Clear any break condition set with TIOCSBRK. */ 376 cdtty_break(sc, p, 0); 377 378 /* 379 * Hang up if necessary. Wait a bit, so the other side has time to 380 * notice even if we immediately open the port again. 381 * Avoid tsleeping above splhigh(). 382 */ 383 if (ISSET(tp->t_cflag, HUPCL)) { 384 cdtty_modem(sc, p, 0); 385 splx(s); 386 /* XXX tsleep will only timeout */ 387 (void) tsleep(sc, TTIPRI, ttclos, hz); 388 s = splserial(); 389 } 390 391 /* Turn off interrupts. */ 392 p->p_srer = 0; 393 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 394 395 splx(s); 396 } 397 398 /* 399 * cdttyopen: open syscall for cdtty terminals.. 400 */ 401 int 402 cdttyopen(dev, flag, mode, p) 403 dev_t dev; 404 int flag; 405 int mode; 406 struct proc *p; 407 { 408 struct tty *tp; 409 struct cd18xx_softc *sc; 410 struct cdtty_port *port; 411 int channel, instance, s, error; 412 413 channel = CD18XX_CHANNEL(dev); 414 instance = CD18XX_INSTANCE(dev); 415 416 /* ensure instance is valid */ 417 if (instance >= clcd_cd.cd_ndevs) 418 return (ENXIO); 419 420 /* get softc and port */ 421 sc = clcd_cd.cd_devs[instance]; 422 if (sc == NULL) 423 return (ENXIO); 424 port = &sc->sc_ports[channel]; 425 if (port == NULL || port->p_rbuf == NULL) 426 return (ENXIO); 427 428 /* kgdb support? maybe later... */ 429 430 tp = port->p_tty; 431 432 /* enforce exclude */ 433 if (tp == NULL || 434 (ISSET(tp->t_state, TS_ISOPEN) && 435 ISSET(tp->t_state, TS_XCLUDE) && 436 kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, 437 &p->p_acflag) != 0)) 438 return (EBUSY); 439 440 s = spltty(); 441 442 /* 443 * Do the following iff this is a first open. 444 */ 445 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 446 struct termios t; 447 448 /* set up things in tp as necessary */ 449 tp->t_dev = dev; 450 451 /* 452 * Initialize the termios status to the defaults. Add in the 453 * sticky bits from TIOCSFLAGS. 454 */ 455 t.c_ispeed = 0; 456 t.c_ospeed = TTYDEF_SPEED; 457 t.c_cflag = TTYDEF_CFLAG; 458 459 if (ISSET(port->p_swflags, TIOCFLAG_CLOCAL)) 460 SET(t.c_cflag, CLOCAL); 461 if (ISSET(port->p_swflags, TIOCFLAG_CRTSCTS)) 462 SET(t.c_cflag, CRTSCTS); 463 if (ISSET(port->p_swflags, TIOCFLAG_CDTRCTS)) 464 SET(t.c_cflag, CDTRCTS); 465 if (ISSET(port->p_swflags, TIOCFLAG_MDMBUF)) 466 SET(t.c_cflag, MDMBUF); 467 468 /* Make sure param will see changes. */ 469 tp->t_ospeed = 0; /* XXX set above ignored? */ 470 (void)cdttyparam(tp, &t); 471 472 tp->t_iflag = TTYDEF_IFLAG; 473 tp->t_oflag = TTYDEF_OFLAG; 474 tp->t_lflag = TTYDEF_LFLAG; 475 ttychars(tp); 476 ttsetwater(tp); 477 478 (void)splserial(); 479 480 /* turn on rx and modem interrupts */ 481 cd18xx_set_car(sc, CD18XX_CHANNEL(dev)); 482 SET(port->p_srer, CD18xx_SRER_Rx | 483 CD18xx_SRER_RxSC | 484 CD18xx_SRER_CD); 485 cd18xx_write(sc, CD18xx_SRER, port->p_srer); 486 487 /* always turn on DTR when open */ 488 cdtty_modem(sc, port, 1); 489 490 /* initialise ring buffer */ 491 port->p_rbget = port->p_rbput = port->p_rbuf; 492 port->p_rbavail = cdtty_rbuf_size; 493 CLR(port->p_rx_flags, RX_ANY_BLOCK); 494 cdtty_hwiflow(sc, port); 495 } 496 497 /* drop spl back before going into the line open */ 498 splx(s); 499 500 error = ttyopen(tp, CD18XX_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 501 if (error == 0) 502 error = (*tp->t_linesw->l_open)(dev, tp); 503 504 return (error); 505 } 506 507 /* 508 * cdttyclose: close syscall for cdtty terminals.. 509 */ 510 int 511 cdttyclose(dev, flag, mode, p) 512 dev_t dev; 513 int flag; 514 int mode; 515 struct proc *p; 516 { 517 struct cd18xx_softc *sc; 518 struct cdtty_port *port; 519 struct tty *tp; 520 int channel, instance; 521 522 channel = CD18XX_CHANNEL(dev); 523 instance = CD18XX_INSTANCE(dev); 524 525 /* ensure instance is valid */ 526 if (instance >= clcd_cd.cd_ndevs) 527 return (ENXIO); 528 529 /* get softc and port */ 530 sc = clcd_cd.cd_devs[instance]; 531 if (sc == NULL) 532 return (ENXIO); 533 port = &sc->sc_ports[channel]; 534 535 tp = port->p_tty; 536 537 (*tp->t_linesw->l_close)(tp, flag); 538 ttyclose(tp); 539 540 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 541 /* 542 * Although we got a last close, the device may still be in 543 * use; e.g. if this was the dialout node, and there are still 544 * processes waiting for carrier on the non-dialout node. 545 */ 546 cdtty_shutdown(sc, port); 547 } 548 549 return (0); 550 } 551 552 /* 553 * cdttyread: read syscall for cdtty terminals.. 554 */ 555 int 556 cdttyread(dev, uio, flag) 557 dev_t dev; 558 struct uio *uio; 559 int flag; 560 { 561 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 562 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 563 struct tty *tp = port->p_tty; 564 565 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 566 } 567 568 /* 569 * cdttywrite: write syscall for cdtty terminals.. 570 */ 571 int 572 cdttywrite(dev, uio, flag) 573 dev_t dev; 574 struct uio *uio; 575 int flag; 576 { 577 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 578 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 579 struct tty *tp = port->p_tty; 580 581 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 582 } 583 584 int 585 cdttypoll(dev, events, p) 586 dev_t dev; 587 int events; 588 struct proc *p; 589 { 590 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 591 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 592 struct tty *tp = port->p_tty; 593 594 return ((*tp->t_linesw->l_poll)(tp, events, p)); 595 } 596 597 /* 598 * cdttytty: return a pointer to our (cdtty) tp. 599 */ 600 struct tty * 601 cdttytty(dev) 602 dev_t dev; 603 { 604 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 605 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 606 607 return (port->p_tty); 608 } 609 610 /* 611 * cdttyioctl: ioctl syscall for cdtty terminals.. 612 */ 613 int 614 cdttyioctl(dev, cmd, data, flag, p) 615 dev_t dev; 616 u_long cmd; 617 caddr_t data; 618 int flag; 619 struct proc *p; 620 { 621 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 622 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 623 struct tty *tp = port->p_tty; 624 int error, s; 625 626 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 627 if (error != EPASSTHROUGH) 628 return (error); 629 630 error = ttioctl(tp, cmd, data, flag, p); 631 if (error != EPASSTHROUGH) 632 return (error); 633 634 s = splserial(); 635 636 switch (cmd) { 637 case TIOCSBRK: 638 cdtty_break(sc, port, 1); 639 break; 640 641 case TIOCCBRK: 642 cdtty_break(sc, port, 0); 643 break; 644 645 case TIOCSDTR: 646 cdtty_modem(sc, port, 1); 647 break; 648 649 case TIOCCDTR: 650 cdtty_modem(sc, port, 0); 651 break; 652 653 case TIOCGFLAGS: 654 *(int *)data = port->p_swflags; 655 break; 656 657 case TIOCSFLAGS: 658 error = kauth_authorize_generic(p->p_cred, KAUTH_GENERIC_ISSUSER, 659 &p->p_acflag); 660 if (error) 661 return (error); 662 port->p_swflags = *(int *)data; 663 break; 664 665 case TIOCMSET: 666 case TIOCMBIS: 667 case TIOCMBIC: 668 case TIOCMGET: 669 default: 670 return (EPASSTHROUGH); 671 } 672 673 splx(s); 674 return (0); 675 } 676 677 /* 678 * Start or restart transmission. 679 */ 680 static void 681 cdttystart(tp) 682 struct tty *tp; 683 { 684 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 685 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 686 int s; 687 688 s = spltty(); 689 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 690 goto out; 691 if (p->p_tx_stopped) 692 goto out; 693 694 if (tp->t_outq.c_cc <= tp->t_lowat) { 695 if (ISSET(tp->t_state, TS_ASLEEP)) { 696 CLR(tp->t_state, TS_ASLEEP); 697 wakeup((caddr_t)&tp->t_outq); 698 } 699 selwakeup(&tp->t_wsel); 700 if (tp->t_outq.c_cc == 0) 701 goto out; 702 } 703 704 /* Grab the first contiguous region of buffer space. */ 705 { 706 u_char *tba; 707 int tbc; 708 709 tba = tp->t_outq.c_cf; 710 tbc = ndqb(&tp->t_outq, 0); 711 712 (void)splserial(); 713 714 p->p_tba = tba; 715 p->p_tbc = tbc; 716 } 717 718 SET(tp->t_state, TS_BUSY); 719 p->p_tx_busy = 1; 720 721 /* turn on tx interrupts */ 722 if ((p->p_srer & CD18xx_SRER_Tx) == 0) { 723 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 724 SET(p->p_srer, CD18xx_SRER_Tx); 725 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 726 } 727 728 /* 729 * Now bail; we can't actually transmit bytes until we're in a 730 * transmit interrupt service routine. 731 */ 732 out: 733 splx(s); 734 return; 735 } 736 737 /* 738 * cdttystop: handing ^S or other stop signals, for a cdtty 739 */ 740 void 741 cdttystop(tp, flag) 742 struct tty *tp; 743 int flag; 744 { 745 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 746 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 747 int s; 748 749 s = splserial(); 750 if (ISSET(tp->t_state, TS_BUSY)) { 751 /* Stop transmitting at the next chunk. */ 752 p->p_tbc = 0; 753 p->p_heldtbc = 0; 754 if (!ISSET(tp->t_state, TS_TTSTOP)) 755 SET(tp->t_state, TS_FLUSH); 756 } 757 splx(s); 758 } 759 760 /* 761 * load a channel's registers. 762 */ 763 void 764 cdtty_loadchannelregs(sc, p) 765 struct cd18xx_softc *sc; 766 struct cdtty_port *p; 767 { 768 769 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 770 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 771 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active = p->p_msvr); 772 cd18xx_write(sc, CD18xx_COR1, p->p_cor1); 773 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 774 cd18xx_write(sc, CD18xx_COR3, p->p_cor3); 775 /* 776 * COR2 and COR3 change commands are not required here for 777 * the CL-CD1865 but we do them anyway for simplicity. 778 */ 779 cd18xx_write(sc, CD18xx_CCR, CD18xx_CCR_CORCHG | 780 CD18xx_CCR_CORCHG_COR1 | 781 CD18xx_CCR_CORCHG_COR2 | 782 CD18xx_CCR_CORCHG_COR3); 783 cd18xx_write(sc, CD18xx_RBPRH, p->p_rbprh); 784 cd18xx_write(sc, CD18xx_RBPRL, p->p_rbprl); 785 cd18xx_write(sc, CD18xx_TBPRH, p->p_tbprh); 786 cd18xx_write(sc, CD18xx_TBPRL, p->p_tbprl); 787 if (cd18xx_wait_ccr(sc)) { 788 DPRINTF(CDD_INFO, 789 ("%s: cdtty_loadchannelregs ccr wait timed out\n", 790 sc->sc_dev.dv_xname)); 791 } 792 cd18xx_write(sc, CD18xx_CCR, p->p_chanctl); 793 } 794 795 /* 796 * Set tty parameters from termios. 797 * XXX - Should just copy the whole termios after 798 * making sure all the changes could be done. 799 */ 800 static int 801 cdttyparam(tp, t) 802 struct tty *tp; 803 struct termios *t; 804 { 805 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 806 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 807 int s; 808 809 /* Check requested parameters. */ 810 if (t->c_ospeed < 0) 811 return (EINVAL); 812 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 813 return (EINVAL); 814 815 /* 816 * For the console, always force CLOCAL and !HUPCL, so that the port 817 * is always active. 818 */ 819 if (ISSET(p->p_swflags, TIOCFLAG_SOFTCAR)) { 820 SET(t->c_cflag, CLOCAL); 821 CLR(t->c_cflag, HUPCL); 822 } 823 824 /* 825 * If there were no changes, don't do anything. This avoids dropping 826 * input and improves performance when all we did was frob things like 827 * VMIN and VTIME. 828 */ 829 if (tp->t_ospeed == t->c_ospeed && 830 tp->t_cflag == t->c_cflag) 831 return (0); 832 833 /* 834 * Block interrupts so that state will not 835 * be altered until we are done setting it up. 836 */ 837 s = splserial(); 838 839 /* 840 * Copy across the size, parity and stop bit info. 841 */ 842 switch (t->c_cflag & CSIZE) { 843 case CS5: 844 p->p_cor1 = CD18xx_COR1_CS5; 845 break; 846 case CS6: 847 p->p_cor1 = CD18xx_COR1_CS6; 848 break; 849 case CS7: 850 p->p_cor1 = CD18xx_COR1_CS7; 851 break; 852 default: 853 p->p_cor1 = CD18xx_COR1_CS8; 854 break; 855 } 856 if (ISSET(t->c_cflag, PARENB)) { 857 SET(p->p_cor1, CD18xx_COR1_PARITY_NORMAL); 858 if (ISSET(t->c_cflag, PARODD)) 859 SET(p->p_cor1, CD18xx_COR1_PARITY_ODD); 860 } 861 if (!ISSET(t->c_iflag, INPCK)) 862 SET(p->p_cor1, CD18xx_COR1_IGNORE); 863 if (ISSET(t->c_cflag, CSTOPB)) 864 SET(p->p_cor1, CD18xx_COR1_STOPBIT_2); 865 866 /* 867 * If we're not in a mode that assumes a connection is present, then 868 * ignore carrier changes. 869 */ 870 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 871 p->p_msvr_dcd = 0; 872 else 873 p->p_msvr_dcd = CD18xx_MSVR_CD; 874 875 /* 876 * Set the flow control pins depending on the current flow control 877 * mode. 878 */ 879 if (ISSET(t->c_cflag, CRTSCTS)) { 880 p->p_mcor1_dtr = CD18xx_MCOR1_DTR; 881 p->p_msvr_rts = CD18xx_MSVR_RTS; 882 p->p_msvr_cts = CD18xx_MSVR_CTS; 883 p->p_cor2 = CD18xx_COR2_RTSAOE|CD18xx_COR2_CTSAE; 884 } else if (ISSET(t->c_cflag, MDMBUF)) { 885 /* 886 * For DTR/DCD flow control, make sure we don't toggle DTR for 887 * carrier detection. 888 */ 889 p->p_mcor1_dtr = 0; 890 p->p_msvr_rts = CD18xx_MSVR_DTR; 891 p->p_msvr_cts = CD18xx_MSVR_CD; 892 p->p_cor2 = 0; 893 } else { 894 /* 895 * If no flow control, then always set RTS. This will make 896 * the other side happy if it mistakenly thinks we're doing 897 * RTS/CTS flow control. 898 */ 899 p->p_mcor1_dtr = CD18xx_MSVR_DTR; 900 p->p_msvr_rts = 0; 901 p->p_msvr_cts = 0; 902 p->p_cor2 = 0; 903 } 904 p->p_msvr_mask = p->p_msvr_cts | p->p_msvr_dcd; 905 906 /* 907 * Set the FIFO threshold based on the receive speed. 908 * 909 * * If it's a low speed, it's probably a mouse or some other 910 * interactive device, so set the threshold low. 911 * * If it's a high speed, trim the trigger level down to prevent 912 * overflows. 913 * * Otherwise set it a bit higher. 914 */ 915 p->p_cor3 = (t->c_ospeed <= 1200 ? 1 : t->c_ospeed <= 38400 ? 8 : 4); 916 917 #define PORT_RATE(o, s) \ 918 (((((o) + (s)/2) / (s)) + CD18xx_xBRPR_TPC/2) / CD18xx_xBRPR_TPC) 919 /* Compute BPS for the requested speeds */ 920 if (t->c_ospeed) { 921 u_int32_t tbpr = PORT_RATE(sc->sc_osc, t->c_ospeed); 922 923 if (tbpr == 0 || tbpr > 0xffff) 924 return (EINVAL); 925 926 p->p_tbprh = tbpr >> 8; 927 p->p_tbprl = tbpr & 0xff; 928 } 929 930 if (t->c_ispeed) { 931 u_int32_t rbpr = PORT_RATE(sc->sc_osc, t->c_ispeed); 932 933 if (rbpr == 0 || rbpr > 0xffff) 934 return (EINVAL); 935 936 p->p_rbprh = rbpr >> 8; 937 p->p_rbprl = rbpr & 0xff; 938 } 939 940 /* And copy to tty. */ 941 tp->t_ispeed = 0; 942 tp->t_ospeed = t->c_ospeed; 943 tp->t_cflag = t->c_cflag; 944 945 if (!p->p_heldchange) { 946 if (p->p_tx_busy) { 947 p->p_heldtbc = p->p_tbc; 948 p->p_tbc = 0; 949 p->p_heldchange = 1; 950 } else 951 cdtty_loadchannelregs(sc, p); 952 } 953 954 if (!ISSET(t->c_cflag, CHWFLOW)) { 955 /* Disable the high water mark. */ 956 p->p_r_hiwat = 0; 957 p->p_r_lowat = 0; 958 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 959 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 960 softintr_schedule(sc->sc_si); 961 } 962 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 963 CLR(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 964 cdtty_hwiflow(sc, p); 965 } 966 } else { 967 p->p_r_hiwat = cdtty_rbuf_hiwat; 968 p->p_r_lowat = cdtty_rbuf_lowat; 969 } 970 971 splx(s); 972 973 /* 974 * Update the tty layer's idea of the carrier bit, in case we changed 975 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 976 * explicit request. 977 */ 978 (void) (*tp->t_linesw->l_modem)(tp, ISSET(p->p_msvr, CD18xx_MSVR_CD)); 979 980 if (!ISSET(t->c_cflag, CHWFLOW)) { 981 if (p->p_tx_stopped) { 982 p->p_tx_stopped = 0; 983 cdttystart(tp); 984 } 985 } 986 987 return (0); 988 } 989 990 static void 991 cdtty_break(sc, p, onoff) 992 struct cd18xx_softc *sc; 993 struct cdtty_port *p; 994 int onoff; 995 { 996 997 /* tell tx intr handler we need a break */ 998 p->p_needbreak = !!onoff; 999 1000 /* turn on tx interrupts if break has changed */ 1001 if (p->p_needbreak != p->p_break) 1002 SET(p->p_srer, CD18xx_SRER_Tx); 1003 1004 if (!p->p_heldchange) { 1005 if (p->p_tx_busy) { 1006 p->p_heldtbc = p->p_tbc; 1007 p->p_tbc = 0; 1008 p->p_heldchange = 1; 1009 } else 1010 cdtty_loadchannelregs(sc, p); 1011 } 1012 } 1013 1014 /* 1015 * Raise or lower modem control (DTR/RTS) signals. If a character is 1016 * in transmission, the change is deferred. 1017 */ 1018 static void 1019 cdtty_modem(sc, p, onoff) 1020 struct cd18xx_softc *sc; 1021 struct cdtty_port *p; 1022 int onoff; 1023 { 1024 1025 if (p->p_mcor1_dtr == 0) 1026 return; 1027 1028 if (onoff) 1029 CLR(p->p_mcor1, p->p_mcor1_dtr); 1030 else 1031 SET(p->p_mcor1, p->p_mcor1_dtr); 1032 1033 if (!p->p_heldchange) { 1034 if (p->p_tx_busy) { 1035 p->p_heldtbc = p->p_tbc; 1036 p->p_tbc = 0; 1037 p->p_heldchange = 1; 1038 } else 1039 cdtty_loadchannelregs(sc, p); 1040 } 1041 } 1042 1043 /* 1044 * Try to block or unblock input using hardware flow-control. 1045 * This is called by kern/tty.c if MDMBUF|CRTSCTS is set, and 1046 * if this function returns non-zero, the TS_TBLOCK flag will 1047 * be set or cleared according to the "block" arg passed. 1048 */ 1049 int 1050 cdttyhwiflow(tp, block) 1051 struct tty *tp; 1052 int block; 1053 { 1054 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 1055 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 1056 int s; 1057 1058 if (p->p_msvr_rts == 0) 1059 return (0); 1060 1061 s = splserial(); 1062 if (block) { 1063 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1064 SET(p->p_rx_flags, RX_TTY_BLOCKED); 1065 cdtty_hwiflow(sc, p); 1066 } 1067 } else { 1068 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1069 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 1070 softintr_schedule(sc->sc_si); 1071 } 1072 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1073 CLR(p->p_rx_flags, RX_TTY_BLOCKED); 1074 cdtty_hwiflow(sc, p); 1075 } 1076 } 1077 splx(s); 1078 return (1); 1079 } 1080 1081 /* 1082 * Internal version of cdttyhwiflow, called at cdtty's priority. 1083 */ 1084 static void 1085 cdtty_hwiflow(sc, p) 1086 struct cd18xx_softc *sc; 1087 struct cdtty_port *p; 1088 { 1089 1090 if (p->p_msvr_rts == 0) 1091 return; 1092 1093 if (ISSET(p->p_rx_flags, RX_ANY_BLOCK)) { 1094 CLR(p->p_msvr, p->p_msvr_rts); 1095 CLR(p->p_msvr_active, p->p_msvr_rts); 1096 } else { 1097 SET(p->p_msvr, p->p_msvr_rts); 1098 SET(p->p_msvr_active, p->p_msvr_rts); 1099 } 1100 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 1101 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active); 1102 } 1103 1104 /* 1105 * indiviual interrupt routines. 1106 */ 1107 1108 /* 1109 * this is the number of interrupts allowed, total. set it to 0 1110 * to allow unlimited interrpts 1111 */ 1112 #define INTR_MAX_ALLOWED 0 1113 1114 #if INTR_MAX_ALLOWED == 0 1115 #define GOTINTR(sc, p) /* nothing */ 1116 #else 1117 int intrcount; 1118 #define GOTINTR(sc, p) \ 1119 do { \ 1120 if (intrcount++ == INTR_MAX_ALLOWED) { \ 1121 CLR(p->p_srer, CD18xx_SRER_Tx); \ 1122 cd18xx_write(sc, CD18xx_SRER, p->p_srer); \ 1123 } \ 1124 DPRINTF(CDD_INTR, (", intrcount %d srer %x", intrcount, p->p_srer)); \ 1125 } while (0) 1126 #endif 1127 1128 /* receiver interrupt */ 1129 static inline void 1130 cd18xx_rint(sc, ns) 1131 struct cd18xx_softc *sc; 1132 int *ns; 1133 { 1134 struct cdtty_port *p; 1135 u_int channel, count; 1136 u_char *put, *end; 1137 u_int cc; 1138 1139 /* work out the channel and softc */ 1140 channel = cd18xx_get_gscr1_channel(sc); 1141 p = &sc->sc_ports[channel]; 1142 DPRINTF(CDD_INTR, ("%s: rint: channel %d", sc->sc_dev.dv_xname, channel)); 1143 GOTINTR(sc, p); 1144 1145 end = p->p_ebuf; 1146 put = p->p_rbput; 1147 cc = p->p_rbavail; 1148 1149 /* read as many bytes as necessary */ 1150 count = cd18xx_read(sc, CD18xx_RDCR); 1151 DPRINTF(CDD_INTR, (", %d bytes available: ", count)); 1152 1153 while (cc > 0 && count > 0) { 1154 u_char rcsr = cd18xx_read(sc, CD18xx_RCSR); 1155 1156 put[0] = cd18xx_read(sc, CD18xx_RDR); 1157 put[1] = rcsr; 1158 1159 if (rcsr) 1160 *ns = 1; 1161 1162 put += 2; 1163 if (put >= end) 1164 put = p->p_rbuf; 1165 1166 DPRINTF(CDD_INTR, (".")); 1167 cc--; 1168 count--; 1169 } 1170 1171 DPRINTF(CDD_INTR, (" finished reading")); 1172 1173 /* 1174 * Current string of incoming characters ended because 1175 * no more data was available or we ran out of space. 1176 * If we're out of space, turn off receive interrupts. 1177 */ 1178 p->p_rbput = put; 1179 p->p_rbavail = cc; 1180 if (!ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1181 p->p_rx_ready = 1; 1182 } 1183 1184 /* 1185 * If we're out of space, disable receive interrupts 1186 * until the queue has drained a bit. 1187 */ 1188 if (!cc) { 1189 SET(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1190 CLR(p->p_srer, CD18xx_SRER_Rx | 1191 CD18xx_SRER_RxSC | 1192 CD18xx_SRER_CD); 1193 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1194 } 1195 1196 /* finish the interrupt transaction with the IC */ 1197 cd18xx_write(sc, CD18xx_EOSRR, 0); 1198 DPRINTF(CDD_INTR, (", done\n")); 1199 } 1200 1201 /* 1202 * transmitter interrupt 1203 * 1204 * note this relys on the fact that we allow the transmitter FIFO to 1205 * drain completely 1206 */ 1207 static inline void 1208 cd18xx_tint(sc, ns) 1209 struct cd18xx_softc *sc; 1210 int *ns; 1211 { 1212 struct cdtty_port *p; 1213 u_int channel; 1214 1215 /* work out the channel and softc */ 1216 channel = cd18xx_get_gscr1_channel(sc); 1217 p = &sc->sc_ports[channel]; 1218 DPRINTF(CDD_INTR, ("%s: tint: channel %d", sc->sc_dev.dv_xname, 1219 channel)); 1220 GOTINTR(sc, p); 1221 1222 /* if the current break condition is wrong, fix it */ 1223 if (p->p_break != p->p_needbreak) { 1224 u_char buf[2]; 1225 1226 DPRINTF(CDD_INTR, (", changing break to %d", p->p_needbreak)); 1227 1228 /* turn on ETC processing */ 1229 cd18xx_write(sc, CD18xx_COR2, p->p_cor2 | CD18xx_COR2_ETC); 1230 1231 buf[0] = CD18xx_TDR_ETC_BYTE; 1232 buf[1] = p->p_needbreak ? CD18xx_TDR_BREAK_BYTE : 1233 CD18xx_TDR_NOBREAK_BYTE; 1234 cd18xx_write_multi(sc, CD18xx_TDR, buf, 2); 1235 1236 p->p_break = p->p_needbreak; 1237 1238 /* turn off ETC processing */ 1239 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 1240 } 1241 1242 /* 1243 * If we've delayed a parameter change, do it now, and restart 1244 * output. 1245 */ 1246 if (p->p_heldchange) { 1247 cdtty_loadchannelregs(sc, p); 1248 p->p_heldchange = 0; 1249 p->p_tbc = p->p_heldtbc; 1250 p->p_heldtbc = 0; 1251 } 1252 1253 /* Output the next chunk of the contiguous buffer, if any. */ 1254 if (p->p_tbc > 0) { 1255 int n; 1256 1257 n = p->p_tbc; 1258 if (n > 8) /* write up to 8 entries */ 1259 n = 8; 1260 DPRINTF(CDD_INTR, (", writing %d bytes to TDR", n)); 1261 cd18xx_write_multi(sc, CD18xx_TDR, p->p_tba, n); 1262 p->p_tbc -= n; 1263 p->p_tba += n; 1264 } 1265 1266 /* Disable transmit completion interrupts if we ran out of bytes. */ 1267 if (p->p_tbc == 0) { 1268 /* Note that Tx interrupts should already be enabled */ 1269 if (ISSET(p->p_srer, CD18xx_SRER_Tx)) { 1270 DPRINTF(CDD_INTR, (", disabling tx interrupts")); 1271 CLR(p->p_srer, CD18xx_SRER_Tx); 1272 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1273 } 1274 if (p->p_tx_busy) { 1275 p->p_tx_busy = 0; 1276 p->p_tx_done = 1; 1277 } 1278 } 1279 *ns = 1; 1280 1281 /* finish the interrupt transaction with the IC */ 1282 cd18xx_write(sc, CD18xx_EOSRR, 0); 1283 DPRINTF(CDD_INTR, (", done\n")); 1284 } 1285 1286 /* modem signal change interrupt */ 1287 static inline void 1288 cd18xx_mint(sc, ns) 1289 struct cd18xx_softc *sc; 1290 int *ns; 1291 { 1292 struct cdtty_port *p; 1293 u_int channel; 1294 u_char msvr, delta; 1295 1296 /* work out the channel and softc */ 1297 channel = cd18xx_get_gscr1_channel(sc); 1298 p = &sc->sc_ports[channel]; 1299 DPRINTF(CDD_INTR, ("%s: mint: channel %d", sc->sc_dev.dv_xname, channel)); 1300 GOTINTR(sc, p); 1301 1302 /* 1303 * We ignore the MCR register, and handle detecting deltas 1304 * via software, like many other serial drivers. 1305 */ 1306 msvr = cd18xx_read(sc, CD18xx_MSVR); 1307 delta = msvr ^ p->p_msvr; 1308 DPRINTF(CDD_INTR, (", msvr %d", msvr)); 1309 1310 /* 1311 * Process normal status changes 1312 */ 1313 if (ISSET(delta, p->p_msvr_mask)) { 1314 SET(p->p_msvr_delta, delta); 1315 1316 DPRINTF(CDD_INTR, (", status changed delta %d", delta)); 1317 /* 1318 * Stop output immediately if we lose the output 1319 * flow control signal or carrier detect. 1320 */ 1321 if (ISSET(~msvr, p->p_msvr_mask)) { 1322 p->p_tbc = 0; 1323 p->p_heldtbc = 0; 1324 /* Stop modem interrupt processing */ 1325 } 1326 p->p_st_check = 1; 1327 *ns = 1; 1328 } 1329 1330 /* reset the modem signal register */ 1331 cd18xx_write(sc, CD18xx_MCR, 0); 1332 1333 /* finish the interrupt transaction with the IC */ 1334 cd18xx_write(sc, CD18xx_EOSRR, 0); 1335 DPRINTF(CDD_INTR, (", done\n")); 1336 } 1337 1338 /* 1339 * hardware interrupt routine. call the relevant interrupt routines until 1340 * no interrupts are pending. 1341 * 1342 * note: we do receive interrupts before all others (as we'd rather lose 1343 * a chance to transmit, than lose a character). and we do transmit 1344 * interrupts before modem interrupts. 1345 * 1346 * we have to traverse all of the cd18xx's attached, unfortunately. 1347 */ 1348 int 1349 cd18xx_hardintr(v) 1350 void *v; 1351 { 1352 int i, rv = 0; 1353 u_char ack; 1354 1355 DPRINTF(CDD_INTR, ("cd18xx_hardintr (ndevs %d):\n", clcd_cd.cd_ndevs)); 1356 for (i = 0; i < clcd_cd.cd_ndevs; i++) 1357 { 1358 struct cd18xx_softc *sc = clcd_cd.cd_devs[i]; 1359 int status, ns = 0; 1360 int count = 1; /* process only 1 interrupts at a time for now */ 1361 1362 if (sc == NULL) 1363 continue; 1364 1365 DPRINTF(CDD_INTR, ("%s:", sc->sc_dev.dv_xname)); 1366 while (count-- && 1367 (status = (cd18xx_read(sc, CD18xx_SRSR) & 1368 CD18xx_SRSR_PENDING))) { 1369 rv = 1; 1370 1371 DPRINTF(CDD_INTR, (" status %x:", status)); 1372 if (ISSET(status, CD18xx_SRSR_RxPEND)) { 1373 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1374 CD18xx_INTRACK_RxINT); 1375 DPRINTF(CDD_INTR, (" rx: ack1 %x\n", ack)); 1376 cd18xx_rint(sc, &ns); 1377 } 1378 if (ISSET(status, CD18xx_SRSR_TxPEND)) { 1379 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1380 CD18xx_INTRACK_TxINT); 1381 DPRINTF(CDD_INTR, (" tx: ack1 %x\n", ack)); 1382 cd18xx_tint(sc, &ns); 1383 1384 } 1385 if (ISSET(status, CD18xx_SRSR_MxPEND)) { 1386 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1387 CD18xx_INTRACK_MxINT); 1388 DPRINTF(CDD_INTR, (" mx: ack1 %x\n", ack)); 1389 cd18xx_mint(sc, &ns); 1390 } 1391 } 1392 if (ns) 1393 softintr_schedule(sc->sc_si); 1394 } 1395 1396 return (rv); 1397 } 1398 1399 /* 1400 * software interrupt 1401 */ 1402 1403 void 1404 cdtty_rxsoft(sc, p, tp) 1405 struct cd18xx_softc *sc; 1406 struct cdtty_port *p; 1407 struct tty *tp; 1408 { 1409 u_char *get, *end; 1410 u_int cc, scc; 1411 u_char rcsr; 1412 int code; 1413 int s; 1414 1415 end = p->p_ebuf; 1416 get = p->p_rbget; 1417 scc = cc = cdtty_rbuf_size - p->p_rbavail; 1418 1419 if (cc == cdtty_rbuf_size) { 1420 p->p_floods++; 1421 #if 0 1422 if (p->p_errors++ == 0) 1423 callout_reset(&p->p_diag_callout, 60 * hz, 1424 cdttydiag, p); 1425 #endif 1426 } 1427 1428 while (cc) { 1429 code = get[0]; 1430 rcsr = get[1]; 1431 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR | CD18xx_RCSR_BREAK | 1432 CD18xx_RCSR_FRAMERR | CD18xx_RCSR_PARITYERR)) { 1433 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR)) { 1434 p->p_overflows++; 1435 #if 0 1436 if (p->p_errors++ == 0) 1437 callout_reset(&p->p_diag_callout, 1438 60 * hz, cdttydiag, p); 1439 #endif 1440 } 1441 if (ISSET(rcsr, CD18xx_RCSR_BREAK|CD18xx_RCSR_FRAMERR)) 1442 SET(code, TTY_FE); 1443 if (ISSET(rcsr, CD18xx_RCSR_PARITYERR)) 1444 SET(code, TTY_PE); 1445 } 1446 if ((*tp->t_linesw->l_rint)(code, tp) == -1) { 1447 /* 1448 * The line discipline's buffer is out of space. 1449 */ 1450 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1451 /* 1452 * We're either not using flow control, or the 1453 * line discipline didn't tell us to block for 1454 * some reason. Either way, we have no way to 1455 * know when there's more space available, so 1456 * just drop the rest of the data. 1457 */ 1458 get += cc << 1; 1459 if (get >= end) 1460 get -= cdtty_rbuf_size << 1; 1461 cc = 0; 1462 } else { 1463 /* 1464 * Don't schedule any more receive processing 1465 * until the line discipline tells us there's 1466 * space available (through cdttyhwiflow()). 1467 * Leave the rest of the data in the input 1468 * buffer. 1469 */ 1470 SET(p->p_rx_flags, RX_TTY_OVERFLOWED); 1471 } 1472 break; 1473 } 1474 get += 2; 1475 if (get >= end) 1476 get = p->p_rbuf; 1477 cc--; 1478 } 1479 1480 if (cc != scc) { 1481 p->p_rbget = get; 1482 s = splserial(); 1483 1484 cc = p->p_rbavail += scc - cc; 1485 /* Buffers should be ok again, release possible block. */ 1486 if (cc >= p->p_r_lowat) { 1487 if (ISSET(p->p_rx_flags, RX_IBUF_OVERFLOWED)) { 1488 CLR(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1489 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 1490 SET(p->p_srer, CD18xx_SRER_Rx | 1491 CD18xx_SRER_RxSC | 1492 CD18xx_SRER_CD); 1493 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1494 } 1495 if (ISSET(p->p_rx_flags, RX_IBUF_BLOCKED)) { 1496 CLR(p->p_rx_flags, RX_IBUF_BLOCKED); 1497 cdtty_hwiflow(sc, p); 1498 } 1499 } 1500 splx(s); 1501 } 1502 } 1503 1504 void 1505 cdtty_txsoft(sc, p, tp) 1506 struct cd18xx_softc *sc; 1507 struct cdtty_port *p; 1508 struct tty *tp; 1509 { 1510 1511 CLR(tp->t_state, TS_BUSY); 1512 if (ISSET(tp->t_state, TS_FLUSH)) 1513 CLR(tp->t_state, TS_FLUSH); 1514 else 1515 ndflush(&tp->t_outq, (int)(p->p_tba - tp->t_outq.c_cf)); 1516 (*tp->t_linesw->l_start)(tp); 1517 } 1518 1519 void 1520 cdtty_stsoft(sc, p, tp) 1521 struct cd18xx_softc *sc; 1522 struct cdtty_port *p; 1523 struct tty *tp; 1524 { 1525 u_char msvr, delta; 1526 int s; 1527 1528 s = splserial(); 1529 msvr = p->p_msvr; 1530 delta = p->p_msvr_delta; 1531 p->p_msvr_delta = 0; 1532 splx(s); 1533 1534 if (ISSET(delta, p->p_msvr_dcd)) { 1535 /* 1536 * Inform the tty layer that carrier detect changed. 1537 */ 1538 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msvr, CD18xx_MSVR_CD)); 1539 } 1540 1541 if (ISSET(delta, p->p_msvr_cts)) { 1542 /* Block or unblock output according to flow control. */ 1543 if (ISSET(msvr, p->p_msvr_cts)) { 1544 p->p_tx_stopped = 0; 1545 (*tp->t_linesw->l_start)(tp); 1546 } else { 1547 p->p_tx_stopped = 1; 1548 } 1549 } 1550 } 1551 1552 void 1553 cd18xx_softintr(v) 1554 void *v; 1555 { 1556 struct cd18xx_softc *sc = v; 1557 struct cdtty_port *p; 1558 struct tty *tp; 1559 int i; 1560 1561 for (i = 0; i < 8; i++) { 1562 p = &sc->sc_ports[i]; 1563 1564 tp = p->p_tty; 1565 if (tp == NULL) 1566 continue; 1567 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1568 continue; 1569 1570 if (p->p_rx_ready) { 1571 p->p_rx_ready = 0; 1572 cdtty_rxsoft(sc, p, tp); 1573 } 1574 1575 if (p->p_st_check) { 1576 p->p_st_check = 0; 1577 cdtty_stsoft(sc, p, tp); 1578 } 1579 1580 if (p->p_tx_done) { 1581 p->p_tx_done = 0; 1582 cdtty_txsoft(sc, p, tp); 1583 } 1584 } 1585 } 1586
Indexes created Tue Sep 30 20:09:53 GMT 2025