dl.c revision 1.45
1 /* $NetBSD: dl.c,v 1.45 2009/05/12 14:43:33 cegger 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 1.45 2009/05/12 14:43:33 cegger 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 struct device 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(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_iot = ua->ua_iot; 238 sc->sc_ioh = ua->ua_ioh; 239 240 /* Tidy up the device */ 241 242 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 243 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 244 245 /* Initialize our softc structure. Should be done in open? */ 246 247 sc->sc_tty = ttymalloc(); 248 tty_attach(sc->sc_tty); 249 250 /* Now register the TX & RX interrupt handlers */ 251 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 252 dlxint, sc, &sc->sc_tintrcnt); 253 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 254 dlrint, sc, &sc->sc_rintrcnt); 255 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 256 device_xname(&sc->sc_dev), "rintr"); 257 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 258 device_xname(&sc->sc_dev), "tintr"); 259 260 printf("\n"); 261 } 262 263 /* Receiver Interrupt Handler */ 264 265 static void 266 dlrint(void *arg) 267 { 268 struct dl_softc *sc = arg; 269 270 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 271 struct tty *tp = sc->sc_tty; 272 unsigned c; 273 int cc; 274 275 c = DL_READ_WORD(DL_UBA_RBUF); 276 cc = c & 0xFF; 277 278 if (!(tp->t_state & TS_ISOPEN)) { 279 cv_broadcast(&tp->t_rawcv); 280 return; 281 } 282 283 if (c & DL_RBUF_OVERRUN_ERR) { 284 /* 285 * XXX: This should really be logged somwhere 286 * else where we can afford the time. 287 */ 288 log(LOG_WARNING, "%s: rx overrun\n", 289 device_xname(&sc->sc_dev)); 290 } 291 if (c & DL_RBUF_FRAMING_ERR) 292 cc |= TTY_FE; 293 if (c & DL_RBUF_PARITY_ERR) 294 cc |= TTY_PE; 295 296 (*tp->t_linesw->l_rint)(cc, tp); 297 #if defined(DIAGNOSTIC) 298 } else { 299 log(LOG_WARNING, "%s: stray rx interrupt\n", 300 device_xname(&sc->sc_dev)); 301 #endif 302 } 303 } 304 305 /* Transmitter Interrupt Handler */ 306 307 static void 308 dlxint(void *arg) 309 { 310 struct dl_softc *sc = arg; 311 struct tty *tp = sc->sc_tty; 312 313 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 314 (*tp->t_linesw->l_start)(tp); 315 316 return; 317 } 318 319 int 320 dlopen(dev_t dev, int flag, int mode, struct lwp *l) 321 { 322 struct tty *tp; 323 struct dl_softc *sc; 324 int unit; 325 326 unit = minor(dev); 327 328 sc = device_lookup_private(&dl_cd, unit); 329 if (!sc) 330 return ENXIO; 331 332 tp = sc->sc_tty; 333 if (tp == NULL) 334 return ENODEV; 335 tp->t_oproc = dlstart; 336 tp->t_param = dlparam; 337 tp->t_dev = dev; 338 339 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 340 return (EBUSY); 341 342 if (!(tp->t_state & TS_ISOPEN)) { 343 ttychars(tp); 344 tp->t_iflag = TTYDEF_IFLAG; 345 tp->t_oflag = TTYDEF_OFLAG; 346 /* No modem control, so set CLOCAL. */ 347 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 348 tp->t_lflag = TTYDEF_LFLAG; 349 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 350 351 dlparam(tp, &tp->t_termios); 352 ttsetwater(tp); 353 354 } 355 356 return ((*tp->t_linesw->l_open)(dev, tp)); 357 } 358 359 /*ARGSUSED*/ 360 int 361 dlclose(dev_t dev, int flag, int mode, struct lwp *l) 362 { 363 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 364 struct tty *tp = sc->sc_tty; 365 366 (*tp->t_linesw->l_close)(tp, flag); 367 368 /* Make sure a BREAK state is not left enabled. */ 369 dlbrk(sc, 0); 370 371 return (ttyclose(tp)); 372 } 373 374 int 375 dlread(dev_t dev, struct uio *uio, int flag) 376 { 377 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 378 struct tty *tp = sc->sc_tty; 379 380 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 381 } 382 383 int 384 dlwrite(dev_t dev, struct uio *uio, int flag) 385 { 386 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 387 struct tty *tp = sc->sc_tty; 388 389 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 390 } 391 392 int 393 dlpoll(dev_t dev, int events, struct lwp *l) 394 { 395 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 396 struct tty *tp = sc->sc_tty; 397 398 return ((*tp->t_linesw->l_poll)(tp, events, l)); 399 } 400 401 int 402 dlioctl(dev_t dev, unsigned long cmd, void *data, int flag, struct lwp *l) 403 { 404 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 405 struct tty *tp = sc->sc_tty; 406 int error; 407 408 409 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 410 if (error != EPASSTHROUGH) 411 return (error); 412 413 error = ttioctl(tp, cmd, data, flag, l); 414 if (error != EPASSTHROUGH) 415 return (error); 416 417 switch (cmd) { 418 419 case TIOCSBRK: 420 dlbrk(sc, 1); 421 break; 422 423 case TIOCCBRK: 424 dlbrk(sc, 0); 425 break; 426 427 case TIOCMGET: 428 /* No modem control, assume they're all low. */ 429 *(int *)data = 0; 430 break; 431 432 default: 433 return (EPASSTHROUGH); 434 } 435 return (0); 436 } 437 438 struct tty * 439 dltty(dev_t dev) 440 { 441 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(dev)); 442 443 return sc->sc_tty; 444 } 445 446 void 447 dlstop(struct tty *tp, int flag) 448 { 449 int s = spltty(); 450 451 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 452 tp->t_state |= TS_FLUSH; 453 splx(s); 454 } 455 456 static void 457 dlstart(struct tty *tp) 458 { 459 struct dl_softc *sc = device_lookup_private(&dl_cd, minor(tp->t_dev)); 460 int s = spltty(); 461 462 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 463 goto out; 464 if (!ttypull(tp)) 465 goto out; 466 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 467 tp->t_state |= TS_BUSY; 468 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 469 } 470 out: 471 splx(s); 472 return; 473 } 474 475 /*ARGSUSED*/ 476 static int 477 dlparam(struct tty *tp, struct termios *t) 478 { 479 /* 480 * All this kind of stuff (speed, character format, whatever) 481 * is set by jumpers on the card. Changing it is thus rather 482 * tricky for a mere device driver. 483 */ 484 return 0; 485 } 486 487 static void 488 dlbrk(struct dl_softc *sc, int state) 489 { 490 int s = spltty(); 491 492 if (state) { 493 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 494 DL_XCSR_TX_BREAK); 495 } else { 496 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 497 ~DL_XCSR_TX_BREAK); 498 } 499 splx(s); 500 } 501
Indexes created Wed Sep 24 05:09:52 GMT 2025