1 /* $NetBSD: dl.c,v 1.28 2004/03/22 18:36:14 bjh21 Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1997 Ben Harris. All rights reserved. 41 * Copyright (c) 1982, 1986, 1990, 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * Ralph Campbell and Rick Macklem. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 */ 71 72 /* 73 * Copyright (c) 1996 Ken C. Wellsch. All rights reserved. 74 * 75 * This code is derived from software contributed to Berkeley by 76 * Ralph Campbell and Rick Macklem. 77 * 78 * Redistribution and use in source and binary forms, with or without 79 * modification, are permitted provided that the following conditions 80 * are met: 81 * 1. Redistributions of source code must retain the above copyright 82 * notice, this list of conditions and the following disclaimer. 83 * 2. Redistributions in binary form must reproduce the above copyright 84 * notice, this list of conditions and the following disclaimer in the 85 * documentation and/or other materials provided with the distribution. 86 * 3. All advertising materials mentioning features or use of this software 87 * must display the following acknowledgement: 88 * This product includes software developed by the University of 89 * California, Berkeley and its contributors. 90 * 4. Neither the name of the University nor the names of its contributors 91 * may be used to endorse or promote products derived from this software 92 * without specific prior written permission. 93 * 94 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 95 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 97 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 98 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 99 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 100 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 101 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 102 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 103 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 104 * SUCH DAMAGE. 105 */ 106 107 /* 108 * dl.c -- Device driver for the DL11 and DLV11 serial cards. 109 * 110 * OS-interface code derived from the dz and dca (hp300) drivers. 111 */ 112 113 #include <sys/cdefs.h> 114 __KERNEL_RCSID(0, "$NetBSD: dl.c,v 1.28 2004/03/22 18:36:14 bjh21 Exp $"); 115 116 #include <sys/param.h> 117 #include <sys/systm.h> 118 #include <sys/ioctl.h> 119 #include <sys/tty.h> 120 #include <sys/proc.h> 121 #include <sys/buf.h> 122 #include <sys/conf.h> 123 #include <sys/file.h> 124 #include <sys/uio.h> 125 #include <sys/kernel.h> 126 #include <sys/syslog.h> 127 #include <sys/device.h> 128 129 #include <machine/bus.h> 130 131 #include <dev/qbus/ubavar.h> 132 133 #include <dev/qbus/dlreg.h> 134 135 #include "ioconf.h" 136 137 struct dl_softc { 138 struct device sc_dev; 139 struct evcnt sc_rintrcnt; 140 struct evcnt sc_tintrcnt; 141 bus_space_tag_t sc_iot; 142 bus_space_handle_t sc_ioh; 143 struct tty *sc_tty; 144 }; 145 146 static int dl_match (struct device *, struct cfdata *, void *); 147 static void dl_attach (struct device *, struct device *, void *); 148 static void dlrint (void *); 149 static void dlxint (void *); 150 static void dlstart (struct tty *); 151 static int dlparam (struct tty *, struct termios *); 152 static void dlbrk (struct dl_softc *, int); 153 154 CFATTACH_DECL(dl, sizeof(struct dl_softc), 155 dl_match, dl_attach, NULL, NULL); 156 157 dev_type_open(dlopen); 158 dev_type_close(dlclose); 159 dev_type_read(dlread); 160 dev_type_write(dlwrite); 161 dev_type_ioctl(dlioctl); 162 dev_type_stop(dlstop); 163 dev_type_tty(dltty); 164 dev_type_poll(dlpoll); 165 166 const struct cdevsw dl_cdevsw = { 167 dlopen, dlclose, dlread, dlwrite, dlioctl, 168 dlstop, dltty, dlpoll, nommap, ttykqfilter, D_TTY 169 }; 170 171 #define DL_READ_WORD(reg) \ 172 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 173 #define DL_WRITE_WORD(reg, val) \ 174 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 175 #define DL_WRITE_BYTE(reg, val) \ 176 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 177 178 /* Autoconfig handles: setup the controller to interrupt, */ 179 /* then complete the housecleaning for full operation */ 180 181 static int 182 dl_match (struct device *parent, struct cfdata *cf, void *aux) 183 { 184 struct uba_attach_args *ua = aux; 185 186 #ifdef DL_DEBUG 187 printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); 188 #endif 189 190 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); 191 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 192 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 193 #ifdef DL_DEBUG 194 printf("failed (step 1; XCSR = %.4b)\n", 195 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 196 DL_XCSR_BITS); 197 #endif 198 return 0; 199 } 200 201 /* 202 * We have to force an interrupt so the uba driver can work 203 * out where we are. Unfortunately, the only way to make a 204 * DL11 interrupt is to get it to send or receive a 205 * character. We'll send a NUL and hope it doesn't hurt 206 * anything. 207 */ 208 209 bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); 210 #if 0 /* This test seems to fail 2/3 of the time :-( */ 211 if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { 212 #ifdef DL_DEBUG 213 printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, 214 DL_XCSR_BITS); 215 #endif 216 return 0; 217 } 218 #endif 219 DELAY(100000); /* delay 1/10 s for character to transmit */ 220 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 221 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 222 #ifdef DL_DEBUG 223 printf("failed (step 3; XCSR = %.4b)\n", 224 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 225 DL_XCSR_BITS); 226 #endif 227 return 0; 228 } 229 230 231 /* What else do I need to do? */ 232 233 return 1; 234 235 } 236 237 static void 238 dl_attach (struct device *parent, struct device *self, void *aux) 239 { 240 struct dl_softc *sc = (void *)self; 241 struct uba_attach_args *ua = aux; 242 243 sc->sc_iot = ua->ua_iot; 244 sc->sc_ioh = ua->ua_ioh; 245 246 /* Tidy up the device */ 247 248 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 249 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 250 251 /* Initialize our softc structure. Should be done in open? */ 252 253 sc->sc_tty = ttymalloc(); 254 tty_attach(sc->sc_tty); 255 256 /* Now register the TX & RX interrupt handlers */ 257 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 258 dlxint, sc, &sc->sc_tintrcnt); 259 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 260 dlrint, sc, &sc->sc_rintrcnt); 261 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 262 sc->sc_dev.dv_xname, "rintr"); 263 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 264 sc->sc_dev.dv_xname, "tintr"); 265 266 printf("\n"); 267 } 268 269 /* Receiver Interrupt Handler */ 270 271 static void 272 dlrint(void *arg) 273 { 274 struct dl_softc *sc = arg; 275 276 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 277 struct tty *tp = sc->sc_tty; 278 unsigned c; 279 int cc; 280 281 c = DL_READ_WORD(DL_UBA_RBUF); 282 cc = c & 0xFF; 283 284 if (!(tp->t_state & TS_ISOPEN)) { 285 wakeup((caddr_t)&tp->t_rawq); 286 return; 287 } 288 289 if (c & DL_RBUF_OVERRUN_ERR) { 290 /* 291 * XXX: This should really be logged somwhere 292 * else where we can afford the time. 293 */ 294 log(LOG_WARNING, "%s: rx overrun\n", 295 sc->sc_dev.dv_xname); 296 } 297 if (c & DL_RBUF_FRAMING_ERR) 298 cc |= TTY_FE; 299 if (c & DL_RBUF_PARITY_ERR) 300 cc |= TTY_PE; 301 302 (*tp->t_linesw->l_rint)(cc, tp); 303 #if defined(DIAGNOSTIC) 304 } else { 305 log(LOG_WARNING, "%s: stray rx interrupt\n", 306 sc->sc_dev.dv_xname); 307 #endif 308 } 309 } 310 311 /* Transmitter Interrupt Handler */ 312 313 static void 314 dlxint(void *arg) 315 { 316 struct dl_softc *sc = arg; 317 struct tty *tp = sc->sc_tty; 318 319 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 320 (*tp->t_linesw->l_start)(tp); 321 322 return; 323 } 324 325 int 326 dlopen(dev_t dev, int flag, int mode, struct proc *p) 327 { 328 struct tty *tp; 329 struct dl_softc *sc; 330 int unit; 331 332 unit = minor(dev); 333 334 if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL) 335 return ENXIO; 336 sc = dl_cd.cd_devs[unit]; 337 338 tp = sc->sc_tty; 339 if (tp == NULL) 340 return ENODEV; 341 tp->t_oproc = dlstart; 342 tp->t_param = dlparam; 343 tp->t_dev = dev; 344 345 if (!(tp->t_state & TS_ISOPEN)) { 346 ttychars(tp); 347 tp->t_iflag = TTYDEF_IFLAG; 348 tp->t_oflag = TTYDEF_OFLAG; 349 /* No modem control, so set CLOCAL. */ 350 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 351 tp->t_lflag = TTYDEF_LFLAG; 352 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 353 354 dlparam(tp, &tp->t_termios); 355 ttsetwater(tp); 356 357 } else if ((tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0) 358 return EBUSY; 359 360 return ((*tp->t_linesw->l_open)(dev, tp)); 361 } 362 363 /*ARGSUSED*/ 364 int 365 dlclose(dev_t dev, int flag, int mode, struct proc *p) 366 { 367 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 368 struct tty *tp = sc->sc_tty; 369 370 (*tp->t_linesw->l_close)(tp, flag); 371 372 /* Make sure a BREAK state is not left enabled. */ 373 dlbrk(sc, 0); 374 375 return (ttyclose(tp)); 376 } 377 378 int 379 dlread(dev_t dev, struct uio *uio, int flag) 380 { 381 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 382 struct tty *tp = sc->sc_tty; 383 384 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 385 } 386 387 int 388 dlwrite(dev_t dev, struct uio *uio, int flag) 389 { 390 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 391 struct tty *tp = sc->sc_tty; 392 393 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 394 } 395 396 int 397 dlpoll(dev_t dev, int events, struct proc *p) 398 { 399 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 400 struct tty *tp = sc->sc_tty; 401 402 return ((*tp->t_linesw->l_poll)(tp, events, p)); 403 } 404 405 int 406 dlioctl(dev_t dev, unsigned long cmd, caddr_t data, int flag, struct proc *p) 407 { 408 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 409 struct tty *tp = sc->sc_tty; 410 int error; 411 412 413 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 414 if (error != EPASSTHROUGH) 415 return (error); 416 417 error = ttioctl(tp, cmd, data, flag, p); 418 if (error != EPASSTHROUGH) 419 return (error); 420 421 switch (cmd) { 422 423 case TIOCSBRK: 424 dlbrk(sc, 1); 425 break; 426 427 case TIOCCBRK: 428 dlbrk(sc, 0); 429 break; 430 431 case TIOCMGET: 432 /* No modem control, assume they're all low. */ 433 *(int *)data = 0; 434 break; 435 436 default: 437 return (EPASSTHROUGH); 438 } 439 return (0); 440 } 441 442 struct tty * 443 dltty(dev_t dev) 444 { 445 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 446 447 return sc->sc_tty; 448 } 449 450 void 451 dlstop(struct tty *tp, int flag) 452 { 453 int s = spltty(); 454 455 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 456 tp->t_state |= TS_FLUSH; 457 splx(s); 458 } 459 460 static void 461 dlstart(struct tty *tp) 462 { 463 struct dl_softc *sc = dl_cd.cd_devs[minor(tp->t_dev)]; 464 int s = spltty(); 465 466 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 467 goto out; 468 if (tp->t_outq.c_cc <= tp->t_lowat) { 469 if (tp->t_state & TS_ASLEEP) { 470 tp->t_state &= ~TS_ASLEEP; 471 wakeup((caddr_t)&tp->t_outq); 472 } 473 selwakeup(&tp->t_wsel); 474 } 475 if (tp->t_outq.c_cc == 0) 476 goto out; 477 478 479 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 480 tp->t_state |= TS_BUSY; 481 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 482 } 483 out: 484 splx(s); 485 return; 486 } 487 488 /*ARGSUSED*/ 489 static int 490 dlparam(struct tty *tp, struct termios *t) 491 { 492 /* 493 * All this kind of stuff (speed, character format, whatever) 494 * is set by jumpers on the card. Changing it is thus rather 495 * tricky for a mere device driver. 496 */ 497 return 0; 498 } 499 500 static void 501 dlbrk(struct dl_softc *sc, int state) 502 { 503 int s = spltty(); 504 505 if (state) { 506 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 507 DL_XCSR_TX_BREAK); 508 } else { 509 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 510 ~DL_XCSR_TX_BREAK); 511 } 512 splx(s); 513 } 514