cd18xx.c revision 1.21
1 /* $NetBSD: cd18xx.c,v 1.21 2007/10/19 11:59:49 ad 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 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /*- 34 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 35 * All rights reserved. 36 * 37 * This code is derived from software contributed to The NetBSD Foundation 38 * by Charles M. Hannum. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by the NetBSD 51 * Foundation, Inc. and its contributors. 52 * 4. Neither the name of The NetBSD Foundation nor the names of its 53 * contributors may be used to endorse or promote products derived 54 * from this software without specific prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 57 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 58 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 59 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 60 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 61 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 62 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 63 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 64 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 65 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 66 * POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * Copyright (c) 1991 The Regents of the University of California. 71 * All rights reserved. 72 * 73 * Redistribution and use in source and binary forms, with or without 74 * modification, are permitted provided that the following conditions 75 * are met: 76 * 1. Redistributions of source code must retain the above copyright 77 * notice, this list of conditions and the following disclaimer. 78 * 2. Redistributions in binary form must reproduce the above copyright 79 * notice, this list of conditions and the following disclaimer in the 80 * documentation and/or other materials provided with the distribution. 81 * 3. Neither the name of the University nor the names of its contributors 82 * may be used to endorse or promote products derived from this software 83 * without specific prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 86 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 87 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 88 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 89 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 90 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 91 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * @(#)com.c 7.5 (Berkeley) 5/16/91 98 */ 99 100 /* 101 * cirrus logic CL-CD180/CD1864/CD1865 driver, based in (large) parts on 102 * the com and z8530 drivers. thanks charles. 103 */ 104 105 #include <sys/cdefs.h> 106 __KERNEL_RCSID(0, "$NetBSD: cd18xx.c,v 1.21 2007/10/19 11:59:49 ad Exp $"); 107 108 #include <sys/param.h> 109 #include <sys/conf.h> 110 #include <sys/device.h> 111 #include <sys/systm.h> 112 #include <sys/malloc.h> 113 #include <sys/proc.h> 114 #include <sys/kernel.h> 115 #include <sys/tty.h> 116 #include <sys/fcntl.h> 117 #include <sys/kauth.h> 118 #include <sys/intr.h> 119 120 #include <sys/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 dev_type_open(cdttyopen); 148 dev_type_close(cdttyclose); 149 dev_type_read(cdttyread); 150 dev_type_write(cdttywrite); 151 dev_type_ioctl(cdttyioctl); 152 dev_type_stop(cdttystop); 153 dev_type_tty(cdttytty); 154 dev_type_poll(cdttypoll); 155 156 const struct cdevsw cdtty_cdevsw = { 157 cdttyopen, cdttyclose, cdttyread, cdttywrite, cdttyioctl, 158 cdttystop, cdttytty, cdttypoll, nommap, ttykqfilter, D_TTY 159 }; 160 161 static void cdtty_shutdown(struct cd18xx_softc *, struct cdtty_port *); 162 static void cdttystart(struct tty *); 163 static int cdttyparam(struct tty *, struct termios *); 164 static void cdtty_break(struct cd18xx_softc *, struct cdtty_port *, int); 165 static void cdtty_modem(struct cd18xx_softc *, struct cdtty_port *, int); 166 static int cdttyhwiflow(struct tty *, int); 167 static void cdtty_hwiflow(struct cd18xx_softc *, struct cdtty_port *); 168 169 static void cdtty_loadchannelregs(struct cd18xx_softc *, 170 struct cdtty_port *); 171 172 /* default read buffer size */ 173 u_int cdtty_rbuf_size = CDTTY_RING_SIZE; 174 175 /* Stop input when 3/4 of the ring is full; restart when only 1/4 is full. */ 176 u_int cdtty_rbuf_hiwat = (CDTTY_RING_SIZE * 1) / 4; 177 u_int cdtty_rbuf_lowat = (CDTTY_RING_SIZE * 3) / 4; 178 179 #define CD18XXDEBUG 180 #ifdef CD18XXDEBUG 181 #define CDD_INFO 0x0001 182 #define CDD_INTR 0x0002 183 int cd18xx_debug = CDD_INTR|CDD_INFO; 184 # define DPRINTF(l, x) if (cd18xx_debug & l) printf x 185 #else 186 # define DPRINTF(l, x) /* nothing */ 187 #endif 188 189 /* Known supported revisions. */ 190 struct cd18xx_revs { 191 u_char revision; 192 u_char onehundred_pin; 193 char *name; 194 } cd18xx_revs[] = { 195 { CD180_GFRCR_REV_B, 0, "CL-CD180 rev. B" }, 196 { CD180_GFRCR_REV_C, 0, "CL-CD180 rev. C" }, 197 { CD1864_GFRCR_REVISION_A, 1, "CL-CD1864 rev. A" }, 198 { CD1865_GFRCR_REVISION_A, 1, "CL-CD1865 rev. A" }, 199 { CD1865_GFRCR_REVISION_B, 1, "CL-CD1865 rev. B" }, 200 { CD1865_GFRCR_REVISION_C, 1, "CL-CD1865 rev. C" }, 201 { 0, 0, 0 } 202 }; 203 204 /* wait for the CCR to go to zero */ 205 static inline int cd18xx_wait_ccr(struct cd18xx_softc *); 206 static inline int 207 cd18xx_wait_ccr(sc) 208 struct cd18xx_softc *sc; 209 { 210 int i = 100000; 211 212 while (--i && 213 bus_space_read_1(sc->sc_tag, sc->sc_handle, CD18xx_CCR) != 0) 214 ; 215 return (i == 0); 216 } 217 218 /* 219 * device attach routine, high-end portion 220 */ 221 void 222 cd18xx_attach(sc) 223 struct cd18xx_softc *sc; 224 { 225 static int chip_id_next = 1; 226 int onehundred_pin, revision, i, port; 227 228 /* read and print the revision */ 229 revision = cd18xx_read(sc, CD18xx_GFRCR); 230 onehundred_pin = ISSET(cd18xx_read(sc, CD18xx_SRCR),CD18xx_SRCR_PKGTYP); 231 for (i = 0; cd18xx_revs[i].name; i++) 232 if (revision == cd18xx_revs[i].revision || 233 onehundred_pin == cd18xx_revs[i].onehundred_pin) { 234 printf(": %s", cd18xx_revs[i].name); 235 break; 236 } 237 238 if (cd18xx_revs[i].name == NULL) { 239 printf("%s: unknown revision, bailing.\n", sc->sc_dev.dv_xname); 240 return; 241 } 242 243 /* prepare for reset */ 244 cd18xx_set_car(sc, 0); 245 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_CLEAR); 246 247 /* wait for CCR to go to zero */ 248 if (cd18xx_wait_ccr(sc)) { 249 printf("cd18xx_attach: reset change command timed out\n"); 250 return; 251 } 252 253 /* full reset of all channels */ 254 cd18xx_write(sc, CD18xx_CCR, 255 CD18xx_CCR_RESET|CD18xx_CCR_RESET_HARD); 256 257 /* loop until the GSVR is ready */ 258 i = 100000; 259 while (--i && cd18xx_read(sc, CD18xx_GSVR) == CD18xx_GSVR_READY) 260 ; 261 if (i == 0) { 262 printf("\n%s: did not reset!\n", sc->sc_dev.dv_xname); 263 return; 264 } 265 266 /* write the chip_id */ 267 sc->sc_chip_id = chip_id_next++; 268 #ifdef DIAGNOSTIC 269 if (sc->sc_chip_id > 31) 270 panic("more than 31 cd18xx's? help."); 271 #endif 272 cd18xx_write(sc, CD18xx_GSVR, CD18xx_GSVR_SETID(sc)); 273 274 /* rx/tx/modem service match vectors, initalised by higher level */ 275 cd18xx_write(sc, CD18xx_MSMR, sc->sc_msmr | 0x80); 276 cd18xx_write(sc, CD18xx_TSMR, sc->sc_tsmr | 0x80); 277 cd18xx_write(sc, CD18xx_RSMR, sc->sc_rsmr | 0x80); 278 279 printf(", gsvr %x msmr %x tsmr %x rsmr %x", 280 cd18xx_read(sc, CD18xx_GSVR), 281 cd18xx_read(sc, CD18xx_MSMR), 282 cd18xx_read(sc, CD18xx_TSMR), 283 cd18xx_read(sc, CD18xx_RSMR)); 284 285 /* prescale registers */ 286 sc->sc_pprh = 0xf0; 287 sc->sc_pprl = 0; 288 cd18xx_write(sc, CD18xx_PPRH, sc->sc_pprh); 289 cd18xx_write(sc, CD18xx_PPRL, sc->sc_pprl); 290 291 /* establish our soft interrupt. */ 292 sc->sc_si = softint_establish(SOFTINT_SERIAL, cd18xx_softintr, sc); 293 294 printf(", 8 ports ready (chip id %d)\n", sc->sc_chip_id); 295 296 /* 297 * finally, we loop over all 8 channels initialising them 298 */ 299 for (port = 0; port < 8; port++) 300 cdtty_attach(sc, port); 301 } 302 303 /* tty portion of the code */ 304 305 /* 306 * tty portion attach routine 307 */ 308 void 309 cdtty_attach(sc, port) 310 struct cd18xx_softc *sc; 311 int port; 312 { 313 struct cdtty_port *p = &sc->sc_ports[port]; 314 int i; 315 316 /* load CAR with channel number */ 317 cd18xx_set_car(sc, port); 318 319 /* wait for CCR to go to zero */ 320 if (cd18xx_wait_ccr(sc)) { 321 printf("cd18xx_attach: change command timed out setting " 322 "CAR for port %d\n", i); 323 return; 324 } 325 326 /* set the RPTR to (arbitrary) 8 */ 327 cd18xx_write(sc, CD18xx_RTPR, 8); 328 329 /* reset the modem signal value register */ 330 sc->sc_ports[port].p_msvr = CD18xx_MSVR_RESET; 331 332 /* zero the service request enable register */ 333 cd18xx_write(sc, CD18xx_SRER, 0); 334 335 /* enable the transmitter & receiver */ 336 SET(p->p_chanctl, CD18xx_CCR_CHANCTL | 337 CD18xx_CCR_CHANCTL_TxEN | 338 CD18xx_CCR_CHANCTL_RxEN); 339 340 /* XXX no console or kgdb support yet! */ 341 342 /* get a tty structure */ 343 p->p_tty = ttymalloc(); 344 p->p_tty->t_oproc = cdttystart; 345 p->p_tty->t_param = cdttyparam; 346 p->p_tty->t_hwiflow = cdttyhwiflow; 347 348 p->p_rbuf = malloc(cdtty_rbuf_size << 1, M_DEVBUF, M_WAITOK); 349 p->p_rbput = p->p_rbget = p->p_rbuf; 350 p->p_rbavail = cdtty_rbuf_size; 351 if (p->p_rbuf == NULL) { 352 printf("%s: unable to allocate ring buffer for tty %d\n", 353 sc->sc_dev.dv_xname, port); 354 return; 355 } 356 p->p_ebuf = p->p_rbuf + (cdtty_rbuf_size << 1); 357 358 tty_attach(p->p_tty); 359 } 360 361 /* 362 * cdtty_shutdown: called when the device is last closed. 363 */ 364 void 365 cdtty_shutdown(sc, p) 366 struct cd18xx_softc *sc; 367 struct cdtty_port *p; 368 { 369 struct tty *tp = p->p_tty; 370 int s; 371 372 s = splserial(); 373 374 /* If we were asserting flow control, then deassert it. */ 375 SET(p->p_rx_flags, RX_IBUF_BLOCKED); 376 cdtty_hwiflow(sc, p); 377 378 /* Clear any break condition set with TIOCSBRK. */ 379 cdtty_break(sc, p, 0); 380 381 /* 382 * Hang up if necessary. Wait a bit, so the other side has time to 383 * notice even if we immediately open the port again. 384 * Avoid tsleeping above splhigh(). 385 */ 386 if (ISSET(tp->t_cflag, HUPCL)) { 387 cdtty_modem(sc, p, 0); 388 splx(s); 389 /* XXX tsleep will only timeout */ 390 (void) tsleep(sc, TTIPRI, ttclos, hz); 391 s = splserial(); 392 } 393 394 /* Turn off interrupts. */ 395 p->p_srer = 0; 396 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 397 398 splx(s); 399 } 400 401 /* 402 * cdttyopen: open syscall for cdtty terminals.. 403 */ 404 int 405 cdttyopen(dev, flag, mode, p) 406 dev_t dev; 407 int flag; 408 int mode; 409 struct proc *p; 410 { 411 struct tty *tp; 412 struct cd18xx_softc *sc; 413 struct cdtty_port *port; 414 int channel, instance, s, error; 415 416 channel = CD18XX_CHANNEL(dev); 417 instance = CD18XX_INSTANCE(dev); 418 419 /* ensure instance is valid */ 420 if (instance >= clcd_cd.cd_ndevs) 421 return (ENXIO); 422 423 /* get softc and port */ 424 sc = clcd_cd.cd_devs[instance]; 425 if (sc == NULL) 426 return (ENXIO); 427 port = &sc->sc_ports[channel]; 428 if (port == NULL || port->p_rbuf == NULL) 429 return (ENXIO); 430 431 /* kgdb support? maybe later... */ 432 433 tp = port->p_tty; 434 435 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 436 return (EBUSY); 437 438 s = spltty(); 439 440 /* 441 * Do the following iff this is a first open. 442 */ 443 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 444 struct termios t; 445 446 /* set up things in tp as necessary */ 447 tp->t_dev = dev; 448 449 /* 450 * Initialize the termios status to the defaults. Add in the 451 * sticky bits from TIOCSFLAGS. 452 */ 453 t.c_ispeed = 0; 454 t.c_ospeed = TTYDEF_SPEED; 455 t.c_cflag = TTYDEF_CFLAG; 456 457 if (ISSET(port->p_swflags, TIOCFLAG_CLOCAL)) 458 SET(t.c_cflag, CLOCAL); 459 if (ISSET(port->p_swflags, TIOCFLAG_CRTSCTS)) 460 SET(t.c_cflag, CRTSCTS); 461 if (ISSET(port->p_swflags, TIOCFLAG_CDTRCTS)) 462 SET(t.c_cflag, CDTRCTS); 463 if (ISSET(port->p_swflags, TIOCFLAG_MDMBUF)) 464 SET(t.c_cflag, MDMBUF); 465 466 /* Make sure param will see changes. */ 467 tp->t_ospeed = 0; /* XXX set above ignored? */ 468 (void)cdttyparam(tp, &t); 469 470 tp->t_iflag = TTYDEF_IFLAG; 471 tp->t_oflag = TTYDEF_OFLAG; 472 tp->t_lflag = TTYDEF_LFLAG; 473 ttychars(tp); 474 ttsetwater(tp); 475 476 (void)splserial(); 477 478 /* turn on rx and modem interrupts */ 479 cd18xx_set_car(sc, CD18XX_CHANNEL(dev)); 480 SET(port->p_srer, CD18xx_SRER_Rx | 481 CD18xx_SRER_RxSC | 482 CD18xx_SRER_CD); 483 cd18xx_write(sc, CD18xx_SRER, port->p_srer); 484 485 /* always turn on DTR when open */ 486 cdtty_modem(sc, port, 1); 487 488 /* initialise ring buffer */ 489 port->p_rbget = port->p_rbput = port->p_rbuf; 490 port->p_rbavail = cdtty_rbuf_size; 491 CLR(port->p_rx_flags, RX_ANY_BLOCK); 492 cdtty_hwiflow(sc, port); 493 } 494 495 /* drop spl back before going into the line open */ 496 splx(s); 497 498 error = ttyopen(tp, CD18XX_DIALOUT(dev), ISSET(flag, O_NONBLOCK)); 499 if (error == 0) 500 error = (*tp->t_linesw->l_open)(dev, tp); 501 502 return (error); 503 } 504 505 /* 506 * cdttyclose: close syscall for cdtty terminals.. 507 */ 508 int 509 cdttyclose(dev, flag, mode, p) 510 dev_t dev; 511 int flag; 512 int mode; 513 struct proc *p; 514 { 515 struct cd18xx_softc *sc; 516 struct cdtty_port *port; 517 struct tty *tp; 518 int channel, instance; 519 520 channel = CD18XX_CHANNEL(dev); 521 instance = CD18XX_INSTANCE(dev); 522 523 /* ensure instance is valid */ 524 if (instance >= clcd_cd.cd_ndevs) 525 return (ENXIO); 526 527 /* get softc and port */ 528 sc = clcd_cd.cd_devs[instance]; 529 if (sc == NULL) 530 return (ENXIO); 531 port = &sc->sc_ports[channel]; 532 533 tp = port->p_tty; 534 535 (*tp->t_linesw->l_close)(tp, flag); 536 ttyclose(tp); 537 538 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { 539 /* 540 * Although we got a last close, the device may still be in 541 * use; e.g. if this was the dialout node, and there are still 542 * processes waiting for carrier on the non-dialout node. 543 */ 544 cdtty_shutdown(sc, port); 545 } 546 547 return (0); 548 } 549 550 /* 551 * cdttyread: read syscall for cdtty terminals.. 552 */ 553 int 554 cdttyread(dev, uio, flag) 555 dev_t dev; 556 struct uio *uio; 557 int flag; 558 { 559 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 560 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 561 struct tty *tp = port->p_tty; 562 563 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 564 } 565 566 /* 567 * cdttywrite: write syscall for cdtty terminals.. 568 */ 569 int 570 cdttywrite(dev, uio, flag) 571 dev_t dev; 572 struct uio *uio; 573 int flag; 574 { 575 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 576 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 577 struct tty *tp = port->p_tty; 578 579 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 580 } 581 582 int 583 cdttypoll(dev, events, p) 584 dev_t dev; 585 int events; 586 struct proc *p; 587 { 588 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 589 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 590 struct tty *tp = port->p_tty; 591 592 return ((*tp->t_linesw->l_poll)(tp, events, p)); 593 } 594 595 /* 596 * cdttytty: return a pointer to our (cdtty) tp. 597 */ 598 struct tty * 599 cdttytty(dev) 600 dev_t dev; 601 { 602 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 603 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 604 605 return (port->p_tty); 606 } 607 608 /* 609 * cdttyioctl: ioctl syscall for cdtty terminals.. 610 */ 611 int 612 cdttyioctl(dev, cmd, data, flag, p) 613 dev_t dev; 614 u_long cmd; 615 void *data; 616 int flag; 617 struct proc *p; 618 { 619 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(dev)]; 620 struct cdtty_port *port = &sc->sc_ports[CD18XX_CHANNEL(dev)]; 621 struct tty *tp = port->p_tty; 622 int error, s; 623 624 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 625 if (error != EPASSTHROUGH) 626 return (error); 627 628 error = ttioctl(tp, cmd, data, flag, p); 629 if (error != EPASSTHROUGH) 630 return (error); 631 632 s = splserial(); 633 634 switch (cmd) { 635 case TIOCSBRK: 636 cdtty_break(sc, port, 1); 637 break; 638 639 case TIOCCBRK: 640 cdtty_break(sc, port, 0); 641 break; 642 643 case TIOCSDTR: 644 cdtty_modem(sc, port, 1); 645 break; 646 647 case TIOCCDTR: 648 cdtty_modem(sc, port, 0); 649 break; 650 651 case TIOCGFLAGS: 652 *(int *)data = port->p_swflags; 653 break; 654 655 case TIOCSFLAGS: 656 error = kauth_authorize_device_tty(l->l_cred, 657 KAUTH_DEVICE_TTY_PRIVSET, tp); 658 if (error) 659 return (error); 660 port->p_swflags = *(int *)data; 661 break; 662 663 case TIOCMSET: 664 case TIOCMBIS: 665 case TIOCMBIC: 666 case TIOCMGET: 667 default: 668 return (EPASSTHROUGH); 669 } 670 671 splx(s); 672 return (0); 673 } 674 675 /* 676 * Start or restart transmission. 677 */ 678 static void 679 cdttystart(tp) 680 struct tty *tp; 681 { 682 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 683 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 684 int s; 685 686 s = spltty(); 687 if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) 688 goto out; 689 if (p->p_tx_stopped) 690 goto out; 691 692 if (tp->t_outq.c_cc <= tp->t_lowat) { 693 if (ISSET(tp->t_state, TS_ASLEEP)) { 694 CLR(tp->t_state, TS_ASLEEP); 695 wakeup((void *)&tp->t_outq); 696 } 697 selwakeup(&tp->t_wsel); 698 if (tp->t_outq.c_cc == 0) 699 goto out; 700 } 701 702 /* Grab the first contiguous region of buffer space. */ 703 { 704 u_char *tba; 705 int tbc; 706 707 tba = tp->t_outq.c_cf; 708 tbc = ndqb(&tp->t_outq, 0); 709 710 (void)splserial(); 711 712 p->p_tba = tba; 713 p->p_tbc = tbc; 714 } 715 716 SET(tp->t_state, TS_BUSY); 717 p->p_tx_busy = 1; 718 719 /* turn on tx interrupts */ 720 if ((p->p_srer & CD18xx_SRER_Tx) == 0) { 721 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 722 SET(p->p_srer, CD18xx_SRER_Tx); 723 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 724 } 725 726 /* 727 * Now bail; we can't actually transmit bytes until we're in a 728 * transmit interrupt service routine. 729 */ 730 out: 731 splx(s); 732 return; 733 } 734 735 /* 736 * cdttystop: handing ^S or other stop signals, for a cdtty 737 */ 738 void 739 cdttystop(tp, flag) 740 struct tty *tp; 741 int flag; 742 { 743 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 744 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 745 int s; 746 747 s = splserial(); 748 if (ISSET(tp->t_state, TS_BUSY)) { 749 /* Stop transmitting at the next chunk. */ 750 p->p_tbc = 0; 751 p->p_heldtbc = 0; 752 if (!ISSET(tp->t_state, TS_TTSTOP)) 753 SET(tp->t_state, TS_FLUSH); 754 } 755 splx(s); 756 } 757 758 /* 759 * load a channel's registers. 760 */ 761 void 762 cdtty_loadchannelregs(sc, p) 763 struct cd18xx_softc *sc; 764 struct cdtty_port *p; 765 { 766 767 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 768 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 769 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active = p->p_msvr); 770 cd18xx_write(sc, CD18xx_COR1, p->p_cor1); 771 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 772 cd18xx_write(sc, CD18xx_COR3, p->p_cor3); 773 /* 774 * COR2 and COR3 change commands are not required here for 775 * the CL-CD1865 but we do them anyway for simplicity. 776 */ 777 cd18xx_write(sc, CD18xx_CCR, CD18xx_CCR_CORCHG | 778 CD18xx_CCR_CORCHG_COR1 | 779 CD18xx_CCR_CORCHG_COR2 | 780 CD18xx_CCR_CORCHG_COR3); 781 cd18xx_write(sc, CD18xx_RBPRH, p->p_rbprh); 782 cd18xx_write(sc, CD18xx_RBPRL, p->p_rbprl); 783 cd18xx_write(sc, CD18xx_TBPRH, p->p_tbprh); 784 cd18xx_write(sc, CD18xx_TBPRL, p->p_tbprl); 785 if (cd18xx_wait_ccr(sc)) { 786 DPRINTF(CDD_INFO, 787 ("%s: cdtty_loadchannelregs ccr wait timed out\n", 788 sc->sc_dev.dv_xname)); 789 } 790 cd18xx_write(sc, CD18xx_CCR, p->p_chanctl); 791 } 792 793 /* 794 * Set tty parameters from termios. 795 * XXX - Should just copy the whole termios after 796 * making sure all the changes could be done. 797 */ 798 static int 799 cdttyparam(tp, t) 800 struct tty *tp; 801 struct termios *t; 802 { 803 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 804 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 805 int s; 806 807 /* Check requested parameters. */ 808 if (t->c_ospeed < 0) 809 return (EINVAL); 810 if (t->c_ispeed && t->c_ispeed != t->c_ospeed) 811 return (EINVAL); 812 813 /* 814 * For the console, always force CLOCAL and !HUPCL, so that the port 815 * is always active. 816 */ 817 if (ISSET(p->p_swflags, TIOCFLAG_SOFTCAR)) { 818 SET(t->c_cflag, CLOCAL); 819 CLR(t->c_cflag, HUPCL); 820 } 821 822 /* 823 * If there were no changes, don't do anything. This avoids dropping 824 * input and improves performance when all we did was frob things like 825 * VMIN and VTIME. 826 */ 827 if (tp->t_ospeed == t->c_ospeed && 828 tp->t_cflag == t->c_cflag) 829 return (0); 830 831 /* 832 * Block interrupts so that state will not 833 * be altered until we are done setting it up. 834 */ 835 s = splserial(); 836 837 /* 838 * Copy across the size, parity and stop bit info. 839 */ 840 switch (t->c_cflag & CSIZE) { 841 case CS5: 842 p->p_cor1 = CD18xx_COR1_CS5; 843 break; 844 case CS6: 845 p->p_cor1 = CD18xx_COR1_CS6; 846 break; 847 case CS7: 848 p->p_cor1 = CD18xx_COR1_CS7; 849 break; 850 default: 851 p->p_cor1 = CD18xx_COR1_CS8; 852 break; 853 } 854 if (ISSET(t->c_cflag, PARENB)) { 855 SET(p->p_cor1, CD18xx_COR1_PARITY_NORMAL); 856 if (ISSET(t->c_cflag, PARODD)) 857 SET(p->p_cor1, CD18xx_COR1_PARITY_ODD); 858 } 859 if (!ISSET(t->c_iflag, INPCK)) 860 SET(p->p_cor1, CD18xx_COR1_IGNORE); 861 if (ISSET(t->c_cflag, CSTOPB)) 862 SET(p->p_cor1, CD18xx_COR1_STOPBIT_2); 863 864 /* 865 * If we're not in a mode that assumes a connection is present, then 866 * ignore carrier changes. 867 */ 868 if (ISSET(t->c_cflag, CLOCAL | MDMBUF)) 869 p->p_msvr_dcd = 0; 870 else 871 p->p_msvr_dcd = CD18xx_MSVR_CD; 872 873 /* 874 * Set the flow control pins depending on the current flow control 875 * mode. 876 */ 877 if (ISSET(t->c_cflag, CRTSCTS)) { 878 p->p_mcor1_dtr = CD18xx_MCOR1_DTR; 879 p->p_msvr_rts = CD18xx_MSVR_RTS; 880 p->p_msvr_cts = CD18xx_MSVR_CTS; 881 p->p_cor2 = CD18xx_COR2_RTSAOE|CD18xx_COR2_CTSAE; 882 } else if (ISSET(t->c_cflag, MDMBUF)) { 883 /* 884 * For DTR/DCD flow control, make sure we don't toggle DTR for 885 * carrier detection. 886 */ 887 p->p_mcor1_dtr = 0; 888 p->p_msvr_rts = CD18xx_MSVR_DTR; 889 p->p_msvr_cts = CD18xx_MSVR_CD; 890 p->p_cor2 = 0; 891 } else { 892 /* 893 * If no flow control, then always set RTS. This will make 894 * the other side happy if it mistakenly thinks we're doing 895 * RTS/CTS flow control. 896 */ 897 p->p_mcor1_dtr = CD18xx_MSVR_DTR; 898 p->p_msvr_rts = 0; 899 p->p_msvr_cts = 0; 900 p->p_cor2 = 0; 901 } 902 p->p_msvr_mask = p->p_msvr_cts | p->p_msvr_dcd; 903 904 /* 905 * Set the FIFO threshold based on the receive speed. 906 * 907 * * If it's a low speed, it's probably a mouse or some other 908 * interactive device, so set the threshold low. 909 * * If it's a high speed, trim the trigger level down to prevent 910 * overflows. 911 * * Otherwise set it a bit higher. 912 */ 913 p->p_cor3 = (t->c_ospeed <= 1200 ? 1 : t->c_ospeed <= 38400 ? 8 : 4); 914 915 #define PORT_RATE(o, s) \ 916 (((((o) + (s)/2) / (s)) + CD18xx_xBRPR_TPC/2) / CD18xx_xBRPR_TPC) 917 /* Compute BPS for the requested speeds */ 918 if (t->c_ospeed) { 919 u_int32_t tbpr = PORT_RATE(sc->sc_osc, t->c_ospeed); 920 921 if (tbpr == 0 || tbpr > 0xffff) 922 return (EINVAL); 923 924 p->p_tbprh = tbpr >> 8; 925 p->p_tbprl = tbpr & 0xff; 926 } 927 928 if (t->c_ispeed) { 929 u_int32_t rbpr = PORT_RATE(sc->sc_osc, t->c_ispeed); 930 931 if (rbpr == 0 || rbpr > 0xffff) 932 return (EINVAL); 933 934 p->p_rbprh = rbpr >> 8; 935 p->p_rbprl = rbpr & 0xff; 936 } 937 938 /* And copy to tty. */ 939 tp->t_ispeed = 0; 940 tp->t_ospeed = t->c_ospeed; 941 tp->t_cflag = t->c_cflag; 942 943 if (!p->p_heldchange) { 944 if (p->p_tx_busy) { 945 p->p_heldtbc = p->p_tbc; 946 p->p_tbc = 0; 947 p->p_heldchange = 1; 948 } else 949 cdtty_loadchannelregs(sc, p); 950 } 951 952 if (!ISSET(t->c_cflag, CHWFLOW)) { 953 /* Disable the high water mark. */ 954 p->p_r_hiwat = 0; 955 p->p_r_lowat = 0; 956 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 957 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 958 softint_schedule(sc->sc_si); 959 } 960 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) { 961 CLR(p->p_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED); 962 cdtty_hwiflow(sc, p); 963 } 964 } else { 965 p->p_r_hiwat = cdtty_rbuf_hiwat; 966 p->p_r_lowat = cdtty_rbuf_lowat; 967 } 968 969 splx(s); 970 971 /* 972 * Update the tty layer's idea of the carrier bit, in case we changed 973 * CLOCAL or MDMBUF. We don't hang up here; we only do that by 974 * explicit request. 975 */ 976 (void) (*tp->t_linesw->l_modem)(tp, ISSET(p->p_msvr, CD18xx_MSVR_CD)); 977 978 if (!ISSET(t->c_cflag, CHWFLOW)) { 979 if (p->p_tx_stopped) { 980 p->p_tx_stopped = 0; 981 cdttystart(tp); 982 } 983 } 984 985 return (0); 986 } 987 988 static void 989 cdtty_break(sc, p, onoff) 990 struct cd18xx_softc *sc; 991 struct cdtty_port *p; 992 int onoff; 993 { 994 995 /* tell tx intr handler we need a break */ 996 p->p_needbreak = !!onoff; 997 998 /* turn on tx interrupts if break has changed */ 999 if (p->p_needbreak != p->p_break) 1000 SET(p->p_srer, CD18xx_SRER_Tx); 1001 1002 if (!p->p_heldchange) { 1003 if (p->p_tx_busy) { 1004 p->p_heldtbc = p->p_tbc; 1005 p->p_tbc = 0; 1006 p->p_heldchange = 1; 1007 } else 1008 cdtty_loadchannelregs(sc, p); 1009 } 1010 } 1011 1012 /* 1013 * Raise or lower modem control (DTR/RTS) signals. If a character is 1014 * in transmission, the change is deferred. 1015 */ 1016 static void 1017 cdtty_modem(sc, p, onoff) 1018 struct cd18xx_softc *sc; 1019 struct cdtty_port *p; 1020 int onoff; 1021 { 1022 1023 if (p->p_mcor1_dtr == 0) 1024 return; 1025 1026 if (onoff) 1027 CLR(p->p_mcor1, p->p_mcor1_dtr); 1028 else 1029 SET(p->p_mcor1, p->p_mcor1_dtr); 1030 1031 if (!p->p_heldchange) { 1032 if (p->p_tx_busy) { 1033 p->p_heldtbc = p->p_tbc; 1034 p->p_tbc = 0; 1035 p->p_heldchange = 1; 1036 } else 1037 cdtty_loadchannelregs(sc, p); 1038 } 1039 } 1040 1041 /* 1042 * Try to block or unblock input using hardware flow-control. 1043 * This is called by kern/tty.c if MDMBUF|CRTSCTS is set, and 1044 * if this function returns non-zero, the TS_TBLOCK flag will 1045 * be set or cleared according to the "block" arg passed. 1046 */ 1047 int 1048 cdttyhwiflow(tp, block) 1049 struct tty *tp; 1050 int block; 1051 { 1052 struct cd18xx_softc *sc = clcd_cd.cd_devs[CD18XX_INSTANCE(tp->t_dev)]; 1053 struct cdtty_port *p = &sc->sc_ports[CD18XX_CHANNEL(tp->t_dev)]; 1054 int s; 1055 1056 if (p->p_msvr_rts == 0) 1057 return (0); 1058 1059 s = splserial(); 1060 if (block) { 1061 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1062 SET(p->p_rx_flags, RX_TTY_BLOCKED); 1063 cdtty_hwiflow(sc, p); 1064 } 1065 } else { 1066 if (ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1067 CLR(p->p_rx_flags, RX_TTY_OVERFLOWED); 1068 softint_schedule(sc->sc_si); 1069 } 1070 if (ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1071 CLR(p->p_rx_flags, RX_TTY_BLOCKED); 1072 cdtty_hwiflow(sc, p); 1073 } 1074 } 1075 splx(s); 1076 return (1); 1077 } 1078 1079 /* 1080 * Internal version of cdttyhwiflow, called at cdtty's priority. 1081 */ 1082 static void 1083 cdtty_hwiflow(sc, p) 1084 struct cd18xx_softc *sc; 1085 struct cdtty_port *p; 1086 { 1087 1088 if (p->p_msvr_rts == 0) 1089 return; 1090 1091 if (ISSET(p->p_rx_flags, RX_ANY_BLOCK)) { 1092 CLR(p->p_msvr, p->p_msvr_rts); 1093 CLR(p->p_msvr_active, p->p_msvr_rts); 1094 } else { 1095 SET(p->p_msvr, p->p_msvr_rts); 1096 SET(p->p_msvr_active, p->p_msvr_rts); 1097 } 1098 cd18xx_set_car(sc, CD18XX_CHANNEL(p->p_tty->t_dev)); 1099 cd18xx_write(sc, CD18xx_MSVR, p->p_msvr_active); 1100 } 1101 1102 /* 1103 * indiviual interrupt routines. 1104 */ 1105 1106 /* 1107 * this is the number of interrupts allowed, total. set it to 0 1108 * to allow unlimited interrpts 1109 */ 1110 #define INTR_MAX_ALLOWED 0 1111 1112 #if INTR_MAX_ALLOWED == 0 1113 #define GOTINTR(sc, p) /* nothing */ 1114 #else 1115 int intrcount; 1116 #define GOTINTR(sc, p) \ 1117 do { \ 1118 if (intrcount++ == INTR_MAX_ALLOWED) { \ 1119 CLR(p->p_srer, CD18xx_SRER_Tx); \ 1120 cd18xx_write(sc, CD18xx_SRER, p->p_srer); \ 1121 } \ 1122 DPRINTF(CDD_INTR, (", intrcount %d srer %x", intrcount, p->p_srer)); \ 1123 } while (0) 1124 #endif 1125 1126 /* receiver interrupt */ 1127 static inline void 1128 cd18xx_rint(sc, ns) 1129 struct cd18xx_softc *sc; 1130 int *ns; 1131 { 1132 struct cdtty_port *p; 1133 u_int channel, count; 1134 u_char *put, *end; 1135 u_int cc; 1136 1137 /* work out the channel and softc */ 1138 channel = cd18xx_get_gscr1_channel(sc); 1139 p = &sc->sc_ports[channel]; 1140 DPRINTF(CDD_INTR, ("%s: rint: channel %d", sc->sc_dev.dv_xname, channel)); 1141 GOTINTR(sc, p); 1142 1143 end = p->p_ebuf; 1144 put = p->p_rbput; 1145 cc = p->p_rbavail; 1146 1147 /* read as many bytes as necessary */ 1148 count = cd18xx_read(sc, CD18xx_RDCR); 1149 DPRINTF(CDD_INTR, (", %d bytes available: ", count)); 1150 1151 while (cc > 0 && count > 0) { 1152 u_char rcsr = cd18xx_read(sc, CD18xx_RCSR); 1153 1154 put[0] = cd18xx_read(sc, CD18xx_RDR); 1155 put[1] = rcsr; 1156 1157 if (rcsr) 1158 *ns = 1; 1159 1160 put += 2; 1161 if (put >= end) 1162 put = p->p_rbuf; 1163 1164 DPRINTF(CDD_INTR, (".")); 1165 cc--; 1166 count--; 1167 } 1168 1169 DPRINTF(CDD_INTR, (" finished reading")); 1170 1171 /* 1172 * Current string of incoming characters ended because 1173 * no more data was available or we ran out of space. 1174 * If we're out of space, turn off receive interrupts. 1175 */ 1176 p->p_rbput = put; 1177 p->p_rbavail = cc; 1178 if (!ISSET(p->p_rx_flags, RX_TTY_OVERFLOWED)) { 1179 p->p_rx_ready = 1; 1180 } 1181 1182 /* 1183 * If we're out of space, disable receive interrupts 1184 * until the queue has drained a bit. 1185 */ 1186 if (!cc) { 1187 SET(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1188 CLR(p->p_srer, CD18xx_SRER_Rx | 1189 CD18xx_SRER_RxSC | 1190 CD18xx_SRER_CD); 1191 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1192 } 1193 1194 /* finish the interrupt transaction with the IC */ 1195 cd18xx_write(sc, CD18xx_EOSRR, 0); 1196 DPRINTF(CDD_INTR, (", done\n")); 1197 } 1198 1199 /* 1200 * transmitter interrupt 1201 * 1202 * note this relys on the fact that we allow the transmitter FIFO to 1203 * drain completely 1204 */ 1205 static inline void 1206 cd18xx_tint(sc, ns) 1207 struct cd18xx_softc *sc; 1208 int *ns; 1209 { 1210 struct cdtty_port *p; 1211 u_int channel; 1212 1213 /* work out the channel and softc */ 1214 channel = cd18xx_get_gscr1_channel(sc); 1215 p = &sc->sc_ports[channel]; 1216 DPRINTF(CDD_INTR, ("%s: tint: channel %d", sc->sc_dev.dv_xname, 1217 channel)); 1218 GOTINTR(sc, p); 1219 1220 /* if the current break condition is wrong, fix it */ 1221 if (p->p_break != p->p_needbreak) { 1222 u_char buf[2]; 1223 1224 DPRINTF(CDD_INTR, (", changing break to %d", p->p_needbreak)); 1225 1226 /* turn on ETC processing */ 1227 cd18xx_write(sc, CD18xx_COR2, p->p_cor2 | CD18xx_COR2_ETC); 1228 1229 buf[0] = CD18xx_TDR_ETC_BYTE; 1230 buf[1] = p->p_needbreak ? CD18xx_TDR_BREAK_BYTE : 1231 CD18xx_TDR_NOBREAK_BYTE; 1232 cd18xx_write_multi(sc, CD18xx_TDR, buf, 2); 1233 1234 p->p_break = p->p_needbreak; 1235 1236 /* turn off ETC processing */ 1237 cd18xx_write(sc, CD18xx_COR2, p->p_cor2); 1238 } 1239 1240 /* 1241 * If we've delayed a parameter change, do it now, and restart 1242 * output. 1243 */ 1244 if (p->p_heldchange) { 1245 cdtty_loadchannelregs(sc, p); 1246 p->p_heldchange = 0; 1247 p->p_tbc = p->p_heldtbc; 1248 p->p_heldtbc = 0; 1249 } 1250 1251 /* Output the next chunk of the contiguous buffer, if any. */ 1252 if (p->p_tbc > 0) { 1253 int n; 1254 1255 n = p->p_tbc; 1256 if (n > 8) /* write up to 8 entries */ 1257 n = 8; 1258 DPRINTF(CDD_INTR, (", writing %d bytes to TDR", n)); 1259 cd18xx_write_multi(sc, CD18xx_TDR, p->p_tba, n); 1260 p->p_tbc -= n; 1261 p->p_tba += n; 1262 } 1263 1264 /* Disable transmit completion interrupts if we ran out of bytes. */ 1265 if (p->p_tbc == 0) { 1266 /* Note that Tx interrupts should already be enabled */ 1267 if (ISSET(p->p_srer, CD18xx_SRER_Tx)) { 1268 DPRINTF(CDD_INTR, (", disabling tx interrupts")); 1269 CLR(p->p_srer, CD18xx_SRER_Tx); 1270 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1271 } 1272 if (p->p_tx_busy) { 1273 p->p_tx_busy = 0; 1274 p->p_tx_done = 1; 1275 } 1276 } 1277 *ns = 1; 1278 1279 /* finish the interrupt transaction with the IC */ 1280 cd18xx_write(sc, CD18xx_EOSRR, 0); 1281 DPRINTF(CDD_INTR, (", done\n")); 1282 } 1283 1284 /* modem signal change interrupt */ 1285 static inline void 1286 cd18xx_mint(sc, ns) 1287 struct cd18xx_softc *sc; 1288 int *ns; 1289 { 1290 struct cdtty_port *p; 1291 u_int channel; 1292 u_char msvr, delta; 1293 1294 /* work out the channel and softc */ 1295 channel = cd18xx_get_gscr1_channel(sc); 1296 p = &sc->sc_ports[channel]; 1297 DPRINTF(CDD_INTR, ("%s: mint: channel %d", sc->sc_dev.dv_xname, channel)); 1298 GOTINTR(sc, p); 1299 1300 /* 1301 * We ignore the MCR register, and handle detecting deltas 1302 * via software, like many other serial drivers. 1303 */ 1304 msvr = cd18xx_read(sc, CD18xx_MSVR); 1305 delta = msvr ^ p->p_msvr; 1306 DPRINTF(CDD_INTR, (", msvr %d", msvr)); 1307 1308 /* 1309 * Process normal status changes 1310 */ 1311 if (ISSET(delta, p->p_msvr_mask)) { 1312 SET(p->p_msvr_delta, delta); 1313 1314 DPRINTF(CDD_INTR, (", status changed delta %d", delta)); 1315 /* 1316 * Stop output immediately if we lose the output 1317 * flow control signal or carrier detect. 1318 */ 1319 if (ISSET(~msvr, p->p_msvr_mask)) { 1320 p->p_tbc = 0; 1321 p->p_heldtbc = 0; 1322 /* Stop modem interrupt processing */ 1323 } 1324 p->p_st_check = 1; 1325 *ns = 1; 1326 } 1327 1328 /* reset the modem signal register */ 1329 cd18xx_write(sc, CD18xx_MCR, 0); 1330 1331 /* finish the interrupt transaction with the IC */ 1332 cd18xx_write(sc, CD18xx_EOSRR, 0); 1333 DPRINTF(CDD_INTR, (", done\n")); 1334 } 1335 1336 /* 1337 * hardware interrupt routine. call the relevant interrupt routines until 1338 * no interrupts are pending. 1339 * 1340 * note: we do receive interrupts before all others (as we'd rather lose 1341 * a chance to transmit, than lose a character). and we do transmit 1342 * interrupts before modem interrupts. 1343 * 1344 * we have to traverse all of the cd18xx's attached, unfortunately. 1345 */ 1346 int 1347 cd18xx_hardintr(v) 1348 void *v; 1349 { 1350 int i, rv = 0; 1351 u_char ack; 1352 1353 DPRINTF(CDD_INTR, ("cd18xx_hardintr (ndevs %d):\n", clcd_cd.cd_ndevs)); 1354 for (i = 0; i < clcd_cd.cd_ndevs; i++) 1355 { 1356 struct cd18xx_softc *sc = clcd_cd.cd_devs[i]; 1357 int status, ns = 0; 1358 int count = 1; /* process only 1 interrupts at a time for now */ 1359 1360 if (sc == NULL) 1361 continue; 1362 1363 DPRINTF(CDD_INTR, ("%s:", sc->sc_dev.dv_xname)); 1364 while (count-- && 1365 (status = (cd18xx_read(sc, CD18xx_SRSR) & 1366 CD18xx_SRSR_PENDING))) { 1367 rv = 1; 1368 1369 DPRINTF(CDD_INTR, (" status %x:", status)); 1370 if (ISSET(status, CD18xx_SRSR_RxPEND)) { 1371 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1372 CD18xx_INTRACK_RxINT); 1373 DPRINTF(CDD_INTR, (" rx: ack1 %x\n", ack)); 1374 cd18xx_rint(sc, &ns); 1375 } 1376 if (ISSET(status, CD18xx_SRSR_TxPEND)) { 1377 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1378 CD18xx_INTRACK_TxINT); 1379 DPRINTF(CDD_INTR, (" tx: ack1 %x\n", ack)); 1380 cd18xx_tint(sc, &ns); 1381 1382 } 1383 if (ISSET(status, CD18xx_SRSR_MxPEND)) { 1384 ack = (*sc->sc_ackfunc)(sc->sc_ackfunc_arg, 1385 CD18xx_INTRACK_MxINT); 1386 DPRINTF(CDD_INTR, (" mx: ack1 %x\n", ack)); 1387 cd18xx_mint(sc, &ns); 1388 } 1389 } 1390 if (ns) 1391 softint_schedule(sc->sc_si); 1392 } 1393 1394 return (rv); 1395 } 1396 1397 /* 1398 * software interrupt 1399 */ 1400 1401 void 1402 cdtty_rxsoft(sc, p, tp) 1403 struct cd18xx_softc *sc; 1404 struct cdtty_port *p; 1405 struct tty *tp; 1406 { 1407 u_char *get, *end; 1408 u_int cc, scc; 1409 u_char rcsr; 1410 int code; 1411 int s; 1412 1413 end = p->p_ebuf; 1414 get = p->p_rbget; 1415 scc = cc = cdtty_rbuf_size - p->p_rbavail; 1416 1417 if (cc == cdtty_rbuf_size) { 1418 p->p_floods++; 1419 #if 0 1420 if (p->p_errors++ == 0) 1421 callout_reset(&p->p_diag_callout, 60 * hz, 1422 cdttydiag, p); 1423 #endif 1424 } 1425 1426 while (cc) { 1427 code = get[0]; 1428 rcsr = get[1]; 1429 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR | CD18xx_RCSR_BREAK | 1430 CD18xx_RCSR_FRAMERR | CD18xx_RCSR_PARITYERR)) { 1431 if (ISSET(rcsr, CD18xx_RCSR_OVERRUNERR)) { 1432 p->p_overflows++; 1433 #if 0 1434 if (p->p_errors++ == 0) 1435 callout_reset(&p->p_diag_callout, 1436 60 * hz, cdttydiag, p); 1437 #endif 1438 } 1439 if (ISSET(rcsr, CD18xx_RCSR_BREAK|CD18xx_RCSR_FRAMERR)) 1440 SET(code, TTY_FE); 1441 if (ISSET(rcsr, CD18xx_RCSR_PARITYERR)) 1442 SET(code, TTY_PE); 1443 } 1444 if ((*tp->t_linesw->l_rint)(code, tp) == -1) { 1445 /* 1446 * The line discipline's buffer is out of space. 1447 */ 1448 if (!ISSET(p->p_rx_flags, RX_TTY_BLOCKED)) { 1449 /* 1450 * We're either not using flow control, or the 1451 * line discipline didn't tell us to block for 1452 * some reason. Either way, we have no way to 1453 * know when there's more space available, so 1454 * just drop the rest of the data. 1455 */ 1456 get += cc << 1; 1457 if (get >= end) 1458 get -= cdtty_rbuf_size << 1; 1459 cc = 0; 1460 } else { 1461 /* 1462 * Don't schedule any more receive processing 1463 * until the line discipline tells us there's 1464 * space available (through cdttyhwiflow()). 1465 * Leave the rest of the data in the input 1466 * buffer. 1467 */ 1468 SET(p->p_rx_flags, RX_TTY_OVERFLOWED); 1469 } 1470 break; 1471 } 1472 get += 2; 1473 if (get >= end) 1474 get = p->p_rbuf; 1475 cc--; 1476 } 1477 1478 if (cc != scc) { 1479 p->p_rbget = get; 1480 s = splserial(); 1481 1482 cc = p->p_rbavail += scc - cc; 1483 /* Buffers should be ok again, release possible block. */ 1484 if (cc >= p->p_r_lowat) { 1485 if (ISSET(p->p_rx_flags, RX_IBUF_OVERFLOWED)) { 1486 CLR(p->p_rx_flags, RX_IBUF_OVERFLOWED); 1487 cd18xx_set_car(sc, CD18XX_CHANNEL(tp->t_dev)); 1488 SET(p->p_srer, CD18xx_SRER_Rx | 1489 CD18xx_SRER_RxSC | 1490 CD18xx_SRER_CD); 1491 cd18xx_write(sc, CD18xx_SRER, p->p_srer); 1492 } 1493 if (ISSET(p->p_rx_flags, RX_IBUF_BLOCKED)) { 1494 CLR(p->p_rx_flags, RX_IBUF_BLOCKED); 1495 cdtty_hwiflow(sc, p); 1496 } 1497 } 1498 splx(s); 1499 } 1500 } 1501 1502 void 1503 cdtty_txsoft(sc, p, tp) 1504 struct cd18xx_softc *sc; 1505 struct cdtty_port *p; 1506 struct tty *tp; 1507 { 1508 1509 CLR(tp->t_state, TS_BUSY); 1510 if (ISSET(tp->t_state, TS_FLUSH)) 1511 CLR(tp->t_state, TS_FLUSH); 1512 else 1513 ndflush(&tp->t_outq, (int)(p->p_tba - tp->t_outq.c_cf)); 1514 (*tp->t_linesw->l_start)(tp); 1515 } 1516 1517 void 1518 cdtty_stsoft(sc, p, tp) 1519 struct cd18xx_softc *sc; 1520 struct cdtty_port *p; 1521 struct tty *tp; 1522 { 1523 u_char msvr, delta; 1524 int s; 1525 1526 s = splserial(); 1527 msvr = p->p_msvr; 1528 delta = p->p_msvr_delta; 1529 p->p_msvr_delta = 0; 1530 splx(s); 1531 1532 if (ISSET(delta, p->p_msvr_dcd)) { 1533 /* 1534 * Inform the tty layer that carrier detect changed. 1535 */ 1536 (void) (*tp->t_linesw->l_modem)(tp, ISSET(msvr, CD18xx_MSVR_CD)); 1537 } 1538 1539 if (ISSET(delta, p->p_msvr_cts)) { 1540 /* Block or unblock output according to flow control. */ 1541 if (ISSET(msvr, p->p_msvr_cts)) { 1542 p->p_tx_stopped = 0; 1543 (*tp->t_linesw->l_start)(tp); 1544 } else { 1545 p->p_tx_stopped = 1; 1546 } 1547 } 1548 } 1549 1550 void 1551 cd18xx_softintr(v) 1552 void *v; 1553 { 1554 struct cd18xx_softc *sc = v; 1555 struct cdtty_port *p; 1556 struct tty *tp; 1557 int i; 1558 1559 for (i = 0; i < 8; i++) { 1560 p = &sc->sc_ports[i]; 1561 1562 tp = p->p_tty; 1563 if (tp == NULL) 1564 continue; 1565 if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) 1566 continue; 1567 1568 if (p->p_rx_ready) { 1569 p->p_rx_ready = 0; 1570 cdtty_rxsoft(sc, p, tp); 1571 } 1572 1573 if (p->p_st_check) { 1574 p->p_st_check = 0; 1575 cdtty_stsoft(sc, p, tp); 1576 } 1577 1578 if (p->p_tx_done) { 1579 p->p_tx_done = 0; 1580 cdtty_txsoft(sc, p, tp); 1581 } 1582 } 1583 } 1584
Indexes created Mon Sep 29 13:09:55 GMT 2025