dl.c revision 1.36
1 /* $NetBSD: dl.c,v 1.36 2006/10/01 19:28:44 elad 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 1.36 2006/10/01 19:28:44 elad 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 #include <sys/kauth.h> 129 130 #include <machine/bus.h> 131 132 #include <dev/qbus/ubavar.h> 133 134 #include <dev/qbus/dlreg.h> 135 136 #include "ioconf.h" 137 138 struct dl_softc { 139 struct device sc_dev; 140 struct evcnt sc_rintrcnt; 141 struct evcnt sc_tintrcnt; 142 bus_space_tag_t sc_iot; 143 bus_space_handle_t sc_ioh; 144 struct tty *sc_tty; 145 }; 146 147 static int dl_match (struct device *, struct cfdata *, void *); 148 static void dl_attach (struct device *, struct device *, void *); 149 static void dlrint (void *); 150 static void dlxint (void *); 151 static void dlstart (struct tty *); 152 static int dlparam (struct tty *, struct termios *); 153 static void dlbrk (struct dl_softc *, int); 154 155 CFATTACH_DECL(dl, sizeof(struct dl_softc), 156 dl_match, dl_attach, NULL, NULL); 157 158 dev_type_open(dlopen); 159 dev_type_close(dlclose); 160 dev_type_read(dlread); 161 dev_type_write(dlwrite); 162 dev_type_ioctl(dlioctl); 163 dev_type_stop(dlstop); 164 dev_type_tty(dltty); 165 dev_type_poll(dlpoll); 166 167 const struct cdevsw dl_cdevsw = { 168 dlopen, dlclose, dlread, dlwrite, dlioctl, 169 dlstop, dltty, dlpoll, nommap, ttykqfilter, D_TTY 170 }; 171 172 #define DL_READ_WORD(reg) \ 173 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 174 #define DL_WRITE_WORD(reg, val) \ 175 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 176 #define DL_WRITE_BYTE(reg, val) \ 177 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 178 179 /* Autoconfig handles: setup the controller to interrupt, */ 180 /* then complete the housecleaning for full operation */ 181 182 static int 183 dl_match (struct device *parent, struct cfdata *cf, void *aux) 184 { 185 struct uba_attach_args *ua = aux; 186 187 #ifdef DL_DEBUG 188 printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); 189 #endif 190 191 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); 192 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 193 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 194 #ifdef DL_DEBUG 195 printf("failed (step 1; XCSR = %.4b)\n", 196 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 197 DL_XCSR_BITS); 198 #endif 199 return 0; 200 } 201 202 /* 203 * We have to force an interrupt so the uba driver can work 204 * out where we are. Unfortunately, the only way to make a 205 * DL11 interrupt is to get it to send or receive a 206 * character. We'll send a NUL and hope it doesn't hurt 207 * anything. 208 */ 209 210 bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); 211 #if 0 /* This test seems to fail 2/3 of the time :-( */ 212 if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { 213 #ifdef DL_DEBUG 214 printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, 215 DL_XCSR_BITS); 216 #endif 217 return 0; 218 } 219 #endif 220 DELAY(100000); /* delay 1/10 s for character to transmit */ 221 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 222 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 223 #ifdef DL_DEBUG 224 printf("failed (step 3; XCSR = %.4b)\n", 225 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 226 DL_XCSR_BITS); 227 #endif 228 return 0; 229 } 230 231 232 /* What else do I need to do? */ 233 234 return 1; 235 236 } 237 238 static void 239 dl_attach (struct device *parent, struct device *self, void *aux) 240 { 241 struct dl_softc *sc = device_private(self); 242 struct uba_attach_args *ua = aux; 243 244 sc->sc_iot = ua->ua_iot; 245 sc->sc_ioh = ua->ua_ioh; 246 247 /* Tidy up the device */ 248 249 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 250 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 251 252 /* Initialize our softc structure. Should be done in open? */ 253 254 sc->sc_tty = ttymalloc(); 255 tty_attach(sc->sc_tty); 256 257 /* Now register the TX & RX interrupt handlers */ 258 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 259 dlxint, sc, &sc->sc_tintrcnt); 260 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 261 dlrint, sc, &sc->sc_rintrcnt); 262 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 263 sc->sc_dev.dv_xname, "rintr"); 264 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 265 sc->sc_dev.dv_xname, "tintr"); 266 267 printf("\n"); 268 } 269 270 /* Receiver Interrupt Handler */ 271 272 static void 273 dlrint(void *arg) 274 { 275 struct dl_softc *sc = arg; 276 277 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 278 struct tty *tp = sc->sc_tty; 279 unsigned c; 280 int cc; 281 282 c = DL_READ_WORD(DL_UBA_RBUF); 283 cc = c & 0xFF; 284 285 if (!(tp->t_state & TS_ISOPEN)) { 286 wakeup((caddr_t)&tp->t_rawq); 287 return; 288 } 289 290 if (c & DL_RBUF_OVERRUN_ERR) { 291 /* 292 * XXX: This should really be logged somwhere 293 * else where we can afford the time. 294 */ 295 log(LOG_WARNING, "%s: rx overrun\n", 296 sc->sc_dev.dv_xname); 297 } 298 if (c & DL_RBUF_FRAMING_ERR) 299 cc |= TTY_FE; 300 if (c & DL_RBUF_PARITY_ERR) 301 cc |= TTY_PE; 302 303 (*tp->t_linesw->l_rint)(cc, tp); 304 #if defined(DIAGNOSTIC) 305 } else { 306 log(LOG_WARNING, "%s: stray rx interrupt\n", 307 sc->sc_dev.dv_xname); 308 #endif 309 } 310 } 311 312 /* Transmitter Interrupt Handler */ 313 314 static void 315 dlxint(void *arg) 316 { 317 struct dl_softc *sc = arg; 318 struct tty *tp = sc->sc_tty; 319 320 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 321 (*tp->t_linesw->l_start)(tp); 322 323 return; 324 } 325 326 int 327 dlopen(dev_t dev, int flag, int mode, struct lwp *l) 328 { 329 struct tty *tp; 330 struct dl_softc *sc; 331 int unit; 332 333 unit = minor(dev); 334 335 if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL) 336 return ENXIO; 337 sc = dl_cd.cd_devs[unit]; 338 339 tp = sc->sc_tty; 340 if (tp == NULL) 341 return ENODEV; 342 tp->t_oproc = dlstart; 343 tp->t_param = dlparam; 344 tp->t_dev = dev; 345 346 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 347 return (EBUSY); 348 349 if (!(tp->t_state & TS_ISOPEN)) { 350 ttychars(tp); 351 tp->t_iflag = TTYDEF_IFLAG; 352 tp->t_oflag = TTYDEF_OFLAG; 353 /* No modem control, so set CLOCAL. */ 354 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 355 tp->t_lflag = TTYDEF_LFLAG; 356 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 357 358 dlparam(tp, &tp->t_termios); 359 ttsetwater(tp); 360 361 } 362 363 return ((*tp->t_linesw->l_open)(dev, tp)); 364 } 365 366 /*ARGSUSED*/ 367 int 368 dlclose(dev_t dev, int flag, int mode, struct lwp *l) 369 { 370 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 371 struct tty *tp = sc->sc_tty; 372 373 (*tp->t_linesw->l_close)(tp, flag); 374 375 /* Make sure a BREAK state is not left enabled. */ 376 dlbrk(sc, 0); 377 378 return (ttyclose(tp)); 379 } 380 381 int 382 dlread(dev_t dev, struct uio *uio, int flag) 383 { 384 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 385 struct tty *tp = sc->sc_tty; 386 387 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 388 } 389 390 int 391 dlwrite(dev_t dev, struct uio *uio, int flag) 392 { 393 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 394 struct tty *tp = sc->sc_tty; 395 396 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 397 } 398 399 int 400 dlpoll(dev_t dev, int events, struct lwp *l) 401 { 402 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 403 struct tty *tp = sc->sc_tty; 404 405 return ((*tp->t_linesw->l_poll)(tp, events, l)); 406 } 407 408 int 409 dlioctl(dev_t dev, unsigned long cmd, caddr_t data, int flag, struct lwp *l) 410 { 411 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 412 struct tty *tp = sc->sc_tty; 413 int error; 414 415 416 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 417 if (error != EPASSTHROUGH) 418 return (error); 419 420 error = ttioctl(tp, cmd, data, flag, l); 421 if (error != EPASSTHROUGH) 422 return (error); 423 424 switch (cmd) { 425 426 case TIOCSBRK: 427 dlbrk(sc, 1); 428 break; 429 430 case TIOCCBRK: 431 dlbrk(sc, 0); 432 break; 433 434 case TIOCMGET: 435 /* No modem control, assume they're all low. */ 436 *(int *)data = 0; 437 break; 438 439 default: 440 return (EPASSTHROUGH); 441 } 442 return (0); 443 } 444 445 struct tty * 446 dltty(dev_t dev) 447 { 448 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 449 450 return sc->sc_tty; 451 } 452 453 void 454 dlstop(struct tty *tp, int flag) 455 { 456 int s = spltty(); 457 458 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 459 tp->t_state |= TS_FLUSH; 460 splx(s); 461 } 462 463 static void 464 dlstart(struct tty *tp) 465 { 466 struct dl_softc *sc = dl_cd.cd_devs[minor(tp->t_dev)]; 467 int s = spltty(); 468 469 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 470 goto out; 471 if (tp->t_outq.c_cc <= tp->t_lowat) { 472 if (tp->t_state & TS_ASLEEP) { 473 tp->t_state &= ~TS_ASLEEP; 474 wakeup((caddr_t)&tp->t_outq); 475 } 476 selwakeup(&tp->t_wsel); 477 } 478 if (tp->t_outq.c_cc == 0) 479 goto out; 480 481 482 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 483 tp->t_state |= TS_BUSY; 484 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 485 } 486 out: 487 splx(s); 488 return; 489 } 490 491 /*ARGSUSED*/ 492 static int 493 dlparam(struct tty *tp, struct termios *t) 494 { 495 /* 496 * All this kind of stuff (speed, character format, whatever) 497 * is set by jumpers on the card. Changing it is thus rather 498 * tricky for a mere device driver. 499 */ 500 return 0; 501 } 502 503 static void 504 dlbrk(struct dl_softc *sc, int state) 505 { 506 int s = spltty(); 507 508 if (state) { 509 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 510 DL_XCSR_TX_BREAK); 511 } else { 512 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 513 ~DL_XCSR_TX_BREAK); 514 } 515 splx(s); 516 } 517
Indexes created Thu Sep 25 08:09:54 GMT 2025