dl.c revision 1.47
1 /* $NetBSD: dl.c,v 1.47 2012/10/27 17:18:37 chs 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997 Ben Harris. All rights reserved. 34 * Copyright (c) 1982, 1986, 1990, 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * Ralph Campbell and Rick Macklem. 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. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 /* 66 * Copyright (c) 1996 Ken C. Wellsch. All rights reserved. 67 * 68 * This code is derived from software contributed to Berkeley by 69 * Ralph Campbell and Rick Macklem. 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. All advertising materials mentioning features or use of this software 80 * must display the following acknowledgement: 81 * This product includes software developed by the University of 82 * California, Berkeley and its contributors. 83 * 4. Neither the name of the University nor the names of its contributors 84 * may be used to endorse or promote products derived from this software 85 * without specific prior written permission. 86 * 87 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 88 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 89 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 90 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 91 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 92 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 93 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 94 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 95 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 96 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 97 * SUCH DAMAGE. 98 */ 99 100 /* 101 * dl.c -- Device driver for the DL11 and DLV11 serial cards. 102 * 103 * OS-interface code derived from the dz and dca (hp300) drivers. 104 */ 105 106 #include <sys/cdefs.h> 107 __KERNEL_RCSID(0, "$NetBSD: dl.c,v 1.47 2012/10/27 17:18:37 chs Exp $"); 108 109 #include <sys/param.h> 110 #include <sys/systm.h> 111 #include <sys/ioctl.h> 112 #include <sys/tty.h> 113 #include <sys/proc.h> 114 #include <sys/buf.h> 115 #include <sys/conf.h> 116 #include <sys/file.h> 117 #include <sys/uio.h> 118 #include <sys/kernel.h> 119 #include <sys/syslog.h> 120 #include <sys/device.h> 121 #include <sys/kauth.h> 122 123 #include <sys/bus.h> 124 125 #include <dev/qbus/ubavar.h> 126 127 #include <dev/qbus/dlreg.h> 128 129 #include "ioconf.h" 130 131 struct dl_softc { 132 device_t sc_dev; 133 struct evcnt sc_rintrcnt; 134 struct evcnt sc_tintrcnt; 135 bus_space_tag_t sc_iot; 136 bus_space_handle_t sc_ioh; 137 struct tty *sc_tty; 138 }; 139 140 static int dl_match (device_t, cfdata_t, void *); 141 static void dl_attach (device_t, device_t, void *); 142 static void dlrint (void *); 143 static void dlxint (void *); 144 static void dlstart (struct tty *); 145 static int dlparam (struct tty *, struct termios *); 146 static void dlbrk (struct dl_softc *, int); 147 148 CFATTACH_DECL_NEW(dl, sizeof(struct dl_softc), 149 dl_match, dl_attach, NULL, NULL); 150 151 dev_type_open(dlopen); 152 dev_type_close(dlclose); 153 dev_type_read(dlread); 154 dev_type_write(dlwrite); 155 dev_type_ioctl(dlioctl); 156 dev_type_stop(dlstop); 157 dev_type_tty(dltty); 158 dev_type_poll(dlpoll); 159 160 const struct cdevsw dl_cdevsw = { 161 dlopen, dlclose, dlread, dlwrite, dlioctl, 162 dlstop, dltty, dlpoll, nommap, ttykqfilter, D_TTY 163 }; 164 165 #define DL_READ_WORD(reg) \ 166 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 167 #define DL_WRITE_WORD(reg, val) \ 168 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 169 #define DL_WRITE_BYTE(reg, val) \ 170 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 171 172 /* Autoconfig handles: setup the controller to interrupt, */ 173 /* then complete the housecleaning for full operation */ 174 175 static int 176 dl_match (device_t parent, cfdata_t cf, void *aux) 177 { 178 struct uba_attach_args *ua = aux; 179 180 #ifdef DL_DEBUG 181 printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); 182 #endif 183 184 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); 185 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 186 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 187 #ifdef DL_DEBUG 188 printf("failed (step 1; XCSR = %.4b)\n", 189 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 190 DL_XCSR_BITS); 191 #endif 192 return 0; 193 } 194 195 /* 196 * We have to force an interrupt so the uba driver can work 197 * out where we are. Unfortunately, the only way to make a 198 * DL11 interrupt is to get it to send or receive a 199 * character. We'll send a NUL and hope it doesn't hurt 200 * anything. 201 */ 202 203 bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); 204 #if 0 /* This test seems to fail 2/3 of the time :-( */ 205 if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { 206 #ifdef DL_DEBUG 207 printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, 208 DL_XCSR_BITS); 209 #endif 210 return 0; 211 } 212 #endif 213 DELAY(100000); /* delay 1/10 s for character to transmit */ 214 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 215 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 216 #ifdef DL_DEBUG 217 printf("failed (step 3; XCSR = %.4b)\n", 218 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 219 DL_XCSR_BITS); 220 #endif 221 return 0; 222 } 223 224 225 /* What else do I need to do? */ 226 227 return 1; 228 229 } 230 231 static void 232 dl_attach (device_t parent, device_t self, void *aux) 233 { 234 struct dl_softc *sc = device_private(self); 235 struct uba_attach_args *ua = aux; 236 237 sc->sc_dev = self; 238 sc->sc_iot = ua->ua_iot; 239 sc->sc_ioh = ua->ua_ioh; 240 241 /* Tidy up the device */ 242 243 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 244 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 245 246 /* Initialize our softc structure. Should be done in open? */ 247 248 sc->sc_tty = tty_alloc(); 249 tty_attach(sc->sc_tty); 250 251 /* Now register the TX & RX interrupt handlers */ 252 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 253 dlxint, sc, &sc->sc_tintrcnt); 254 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 255 dlrint, sc, &sc->sc_rintrcnt); 256 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 257 device_xname(sc->sc_dev), "rintr"); 258 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 259 device_xname(sc->sc_dev), "tintr"); 260 261 printf("\n"); 262 } 263 264 /* Receiver Interrupt Handler */ 265 266 static void 267 dlrint(void *arg) 268 { 269 struct dl_softc *sc = arg; 270 271 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 272 struct tty *tp = sc->sc_tty; 273 unsigned c; 274 int cc; 275 276 c = DL_READ_WORD(DL_UBA_RBUF); 277 cc = c & 0xFF; 278 279 if (!(tp->t_state & TS_ISOPEN)) { 280 cv_broadcast(&tp->t_rawcv); 281 return; 282 } 283 284 if (c & DL_RBUF_OVERRUN_ERR) { 285 /* 286 * XXX: This should really be logged somwhere 287 * else where we can afford the time. 288 */ 289 log(LOG_WARNING, "%s: rx overrun\n", 290 device_xname(sc->sc_dev)); 291 } 292 if (c & DL_RBUF_FRAMING_ERR) 293 cc |= TTY_FE; 294 if (c & DL_RBUF_PARITY_ERR) 295 cc |= TTY_PE; 296 297 (*tp->t_linesw->l_rint)(cc, tp); 298 #if defined(DIAGNOSTIC) 299 } else { 300 log(LOG_WARNING, "%s: stray rx interrupt\n", 301 device_xname(sc->sc_dev)); 302 #endif 303 } 304 } 305 306 /* Transmitter Interrupt Handler */ 307 308 static void 309 dlxint(void *arg) 310 { 311 struct dl_softc *sc = arg; 312 struct tty *tp = sc->sc_tty; 313 314 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 315 (*tp->t_linesw->l_start)(tp); 316 317 return; 318 } 319 320 int 321 dlopen(dev_t dev, int flag, int mode, struct lwp *l) 322 { 323 struct tty *tp; 324 struct dl_softc *sc; 325 int unit; 326 327 unit = minor(dev); 328 329 sc = device_lookup_private(&dl_cd, unit); 330 if (!sc) 331 return ENXIO; 332 333 tp = sc->sc_tty; 334 if (tp == NULL) 335 return ENODEV; 336 tp->t_oproc = dlstart; 337 tp->t_param = dlparam; 338 tp->t_dev = dev; 339 340 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 341 return (EBUSY); 342 343 if (!(tp->t_state & TS_ISOPEN)) { 344 ttychars(tp); 345 tp->t_iflag = TTYDEF_IFLAG; 346 tp->t_oflag = TTYDEF_OFLAG; 347 /* No modem control, so set CLOCAL. */ 348 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 349 tp->t_lflag = TTYDEF_LFLAG; 350 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 351 352 dlparam(tp, &tp->t_termios); 353 ttsetwater(tp); 354 355 } 356 357 return ((*tp->t_linesw->l_open)(dev, tp)); 358 } 359 360 /*ARGSUSED*/ 361 int 362 dlclose(dev_t dev, int flag, int mode, struct lwp *l) 363 { 364 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 365 struct tty *tp = sc->sc_tty; 366 367 (*tp->t_linesw->l_close)(tp, flag); 368 369 /* Make sure a BREAK state is not left enabled. */ 370 dlbrk(sc, 0); 371 372 return (ttyclose(tp)); 373 } 374 375 int 376 dlread(dev_t dev, struct uio *uio, int flag) 377 { 378 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 379 struct tty *tp = sc->sc_tty; 380 381 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 382 } 383 384 int 385 dlwrite(dev_t dev, struct uio *uio, int flag) 386 { 387 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 388 struct tty *tp = sc->sc_tty; 389 390 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 391 } 392 393 int 394 dlpoll(dev_t dev, int events, struct lwp *l) 395 { 396 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 397 struct tty *tp = sc->sc_tty; 398 399 return ((*tp->t_linesw->l_poll)(tp, events, l)); 400 } 401 402 int 403 dlioctl(dev_t dev, unsigned long cmd, void *data, int flag, struct lwp *l) 404 { 405 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 406 struct tty *tp = sc->sc_tty; 407 int error; 408 409 410 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 411 if (error != EPASSTHROUGH) 412 return (error); 413 414 error = ttioctl(tp, cmd, data, flag, l); 415 if (error != EPASSTHROUGH) 416 return (error); 417 418 switch (cmd) { 419 420 case TIOCSBRK: 421 dlbrk(sc, 1); 422 break; 423 424 case TIOCCBRK: 425 dlbrk(sc, 0); 426 break; 427 428 case TIOCMGET: 429 /* No modem control, assume they're all low. */ 430 *(int *)data = 0; 431 break; 432 433 default: 434 return (EPASSTHROUGH); 435 } 436 return (0); 437 } 438 439 struct tty * 440 dltty(dev_t dev) 441 { 442 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 443 444 return sc->sc_tty; 445 } 446 447 void 448 dlstop(struct tty *tp, int flag) 449 { 450 int s = spltty(); 451 452 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 453 tp->t_state |= TS_FLUSH; 454 splx(s); 455 } 456 457 static void 458 dlstart(struct tty *tp) 459 { 460 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(tp->t_dev)); 461 int s = spltty(); 462 463 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 464 goto out; 465 if (!ttypull(tp)) 466 goto out; 467 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 468 tp->t_state |= TS_BUSY; 469 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 470 } 471 out: 472 splx(s); 473 return; 474 } 475 476 /*ARGSUSED*/ 477 static int 478 dlparam(struct tty *tp, struct termios *t) 479 { 480 /* 481 * All this kind of stuff (speed, character format, whatever) 482 * is set by jumpers on the card. Changing it is thus rather 483 * tricky for a mere device driver. 484 */ 485 return 0; 486 } 487 488 static void 489 dlbrk(struct dl_softc *sc, int state) 490 { 491 int s = spltty(); 492 493 if (state) { 494 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 495 DL_XCSR_TX_BREAK); 496 } else { 497 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 498 ~DL_XCSR_TX_BREAK); 499 } 500 splx(s); 501 } 502
Indexes created Tue Sep 30 07:10:03 GMT 2025