dl.c revision 1.21
1 /* $NetBSD: dl.c,v 1.21 2002/09/06 13:18:43 gehenna 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) 1996 Ken C. Wellsch. All rights reserved. 42 * Copyright (c) 1982, 1986, 1990, 1992, 1993 43 * The Regents of the University of California. All rights reserved. 44 * 45 * This code is derived from software contributed to Berkeley by 46 * Ralph Campbell and Rick Macklem. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed by the University of 59 * California, Berkeley and its contributors. 60 * 4. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 */ 76 77 /* 78 * dl.c -- Device driver for the DL11 and DLV11 serial cards. 79 * 80 * OS-interface code derived from the dz and dca (hp300) drivers. 81 */ 82 83 #include <sys/cdefs.h> 84 __KERNEL_RCSID(0, "$NetBSD: dl.c,v 1.21 2002/09/06 13:18:43 gehenna Exp $"); 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/ioctl.h> 89 #include <sys/tty.h> 90 #include <sys/proc.h> 91 #include <sys/map.h> 92 #include <sys/buf.h> 93 #include <sys/conf.h> 94 #include <sys/file.h> 95 #include <sys/uio.h> 96 #include <sys/kernel.h> 97 #include <sys/syslog.h> 98 #include <sys/device.h> 99 100 #include <machine/bus.h> 101 102 #include <dev/qbus/ubavar.h> 103 104 #include <dev/qbus/dlreg.h> 105 106 #include "ioconf.h" 107 108 struct dl_softc { 109 struct device sc_dev; 110 struct evcnt sc_rintrcnt; 111 struct evcnt sc_tintrcnt; 112 bus_space_tag_t sc_iot; 113 bus_space_handle_t sc_ioh; 114 struct tty *sc_tty; 115 }; 116 117 static int dl_match (struct device *, struct cfdata *, void *); 118 static void dl_attach (struct device *, struct device *, void *); 119 static void dlrint (void *); 120 static void dlxint (void *); 121 static void dlstart (struct tty *); 122 static int dlparam (struct tty *, struct termios *); 123 static void dlbrk (struct dl_softc *, int); 124 125 struct cfattach dl_ca = { 126 sizeof(struct dl_softc), dl_match, dl_attach 127 }; 128 129 dev_type_open(dlopen); 130 dev_type_close(dlclose); 131 dev_type_read(dlread); 132 dev_type_write(dlwrite); 133 dev_type_ioctl(dlioctl); 134 dev_type_stop(dlstop); 135 dev_type_tty(dltty); 136 dev_type_poll(dlpoll); 137 138 const struct cdevsw dl_cdevsw = { 139 dlopen, dlclose, dlread, dlwrite, dlioctl, 140 dlstop, dltty, dlpoll, nommap, D_TTY 141 }; 142 143 #define DL_READ_WORD(reg) \ 144 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 145 #define DL_WRITE_WORD(reg, val) \ 146 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 147 #define DL_WRITE_BYTE(reg, val) \ 148 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 149 150 /* Autoconfig handles: setup the controller to interrupt, */ 151 /* then complete the housecleaning for full operation */ 152 153 static int 154 dl_match (struct device *parent, struct cfdata *cf, void *aux) 155 { 156 struct uba_attach_args *ua = aux; 157 158 #ifdef DL_DEBUG 159 printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); 160 #endif 161 162 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); 163 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 164 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 165 #ifdef DL_DEBUG 166 printf("failed (step 1; XCSR = %.4b)\n", 167 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 168 DL_XCSR_BITS); 169 #endif 170 return 0; 171 } 172 173 /* 174 * We have to force an interrupt so the uba driver can work 175 * out where we are. Unfortunately, the only way to make a 176 * DL11 interrupt is to get it to send or receive a 177 * character. We'll send a NUL and hope it doesn't hurt 178 * anything. 179 */ 180 181 bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); 182 #if 0 /* This test seems to fail 2/3 of the time :-( */ 183 if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { 184 #ifdef DL_DEBUG 185 printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, 186 DL_XCSR_BITS); 187 #endif 188 return 0; 189 } 190 #endif 191 DELAY(100000); /* delay 1/10 s for character to transmit */ 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 3; 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 /* What else do I need to do? */ 204 205 return 1; 206 207 } 208 209 static void 210 dl_attach (struct device *parent, struct device *self, void *aux) 211 { 212 struct dl_softc *sc = (void *)self; 213 struct uba_attach_args *ua = aux; 214 215 sc->sc_iot = ua->ua_iot; 216 sc->sc_ioh = ua->ua_ioh; 217 218 /* Tidy up the device */ 219 220 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 221 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 222 223 /* Initialize our softc structure. Should be done in open? */ 224 225 sc->sc_tty = ttymalloc(); 226 tty_attach(sc->sc_tty); 227 228 /* Now register the TX & RX interrupt handlers */ 229 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 230 dlxint, sc, &sc->sc_tintrcnt); 231 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 232 dlrint, sc, &sc->sc_rintrcnt); 233 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 234 sc->sc_dev.dv_xname, "rintr"); 235 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 236 sc->sc_dev.dv_xname, "tintr"); 237 238 printf("\n"); 239 } 240 241 /* Receiver Interrupt Handler */ 242 243 static void 244 dlrint(void *arg) 245 { 246 struct dl_softc *sc = arg; 247 248 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 249 struct tty *tp = sc->sc_tty; 250 unsigned c; 251 int cc; 252 253 c = DL_READ_WORD(DL_UBA_RBUF); 254 cc = c & 0xFF; 255 256 if (!(tp->t_state & TS_ISOPEN)) { 257 wakeup((caddr_t)&tp->t_rawq); 258 return; 259 } 260 261 if (c & DL_RBUF_OVERRUN_ERR) { 262 /* 263 * XXX: This should really be logged somwhere 264 * else where we can afford the time. 265 */ 266 log(LOG_WARNING, "%s: rx overrun\n", 267 sc->sc_dev.dv_xname); 268 } 269 if (c & DL_RBUF_FRAMING_ERR) 270 cc |= TTY_FE; 271 if (c & DL_RBUF_PARITY_ERR) 272 cc |= TTY_PE; 273 274 (*tp->t_linesw->l_rint)(cc, tp); 275 #if defined(DIAGNOSTIC) 276 } else { 277 log(LOG_WARNING, "%s: stray rx interrupt\n", 278 sc->sc_dev.dv_xname); 279 #endif 280 } 281 } 282 283 /* Transmitter Interrupt Handler */ 284 285 static void 286 dlxint(void *arg) 287 { 288 struct dl_softc *sc = arg; 289 struct tty *tp = sc->sc_tty; 290 291 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 292 (*tp->t_linesw->l_start)(tp); 293 294 return; 295 } 296 297 int 298 dlopen(dev_t dev, int flag, int mode, struct proc *p) 299 { 300 struct tty *tp; 301 struct dl_softc *sc; 302 int unit; 303 304 unit = minor(dev); 305 306 if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL) 307 return ENXIO; 308 sc = dl_cd.cd_devs[unit]; 309 310 tp = sc->sc_tty; 311 if (tp == NULL) 312 return ENODEV; 313 tp->t_oproc = dlstart; 314 tp->t_param = dlparam; 315 tp->t_dev = dev; 316 317 if (!(tp->t_state & TS_ISOPEN)) { 318 ttychars(tp); 319 tp->t_iflag = TTYDEF_IFLAG; 320 tp->t_oflag = TTYDEF_OFLAG; 321 /* No modem control, so set CLOCAL. */ 322 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 323 tp->t_lflag = TTYDEF_LFLAG; 324 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 325 326 dlparam(tp, &tp->t_termios); 327 ttsetwater(tp); 328 329 } else if ((tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0) 330 return EBUSY; 331 332 return ((*tp->t_linesw->l_open)(dev, tp)); 333 } 334 335 /*ARGSUSED*/ 336 int 337 dlclose(dev_t dev, int flag, int mode, struct proc *p) 338 { 339 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 340 struct tty *tp = sc->sc_tty; 341 342 (*tp->t_linesw->l_close)(tp, flag); 343 344 /* Make sure a BREAK state is not left enabled. */ 345 dlbrk(sc, 0); 346 347 return (ttyclose(tp)); 348 } 349 350 int 351 dlread(dev_t dev, struct uio *uio, int flag) 352 { 353 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 354 struct tty *tp = sc->sc_tty; 355 356 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 357 } 358 359 int 360 dlwrite(dev_t dev, struct uio *uio, int flag) 361 { 362 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 363 struct tty *tp = sc->sc_tty; 364 365 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 366 } 367 368 int 369 dlpoll(dev_t dev, int events, struct proc *p) 370 { 371 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 372 struct tty *tp = sc->sc_tty; 373 374 return ((*tp->t_linesw->l_poll)(tp, events, p)); 375 } 376 377 int 378 dlioctl(dev_t dev, unsigned long cmd, caddr_t data, int flag, struct proc *p) 379 { 380 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 381 struct tty *tp = sc->sc_tty; 382 int error; 383 384 385 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 386 if (error != EPASSTHROUGH) 387 return (error); 388 389 error = ttioctl(tp, cmd, data, flag, p); 390 if (error != EPASSTHROUGH) 391 return (error); 392 393 switch (cmd) { 394 395 case TIOCSBRK: 396 dlbrk(sc, 1); 397 break; 398 399 case TIOCCBRK: 400 dlbrk(sc, 0); 401 break; 402 403 case TIOCMGET: 404 /* No modem control, assume they're all low. */ 405 *(int *)data = 0; 406 break; 407 408 default: 409 return (EPASSTHROUGH); 410 } 411 return (0); 412 } 413 414 struct tty * 415 dltty(dev_t dev) 416 { 417 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 418 419 return sc->sc_tty; 420 } 421 422 void 423 dlstop(struct tty *tp, int flag) 424 { 425 int s = spltty(); 426 427 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 428 tp->t_state |= TS_FLUSH; 429 splx(s); 430 } 431 432 static void 433 dlstart(struct tty *tp) 434 { 435 struct dl_softc *sc = dl_cd.cd_devs[minor(tp->t_dev)]; 436 int s = spltty(); 437 438 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 439 goto out; 440 if (tp->t_outq.c_cc <= tp->t_lowat) { 441 if (tp->t_state & TS_ASLEEP) { 442 tp->t_state &= ~TS_ASLEEP; 443 wakeup((caddr_t)&tp->t_outq); 444 } 445 selwakeup(&tp->t_wsel); 446 } 447 if (tp->t_outq.c_cc == 0) 448 goto out; 449 450 451 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 452 tp->t_state |= TS_BUSY; 453 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 454 } 455 out: 456 splx(s); 457 return; 458 } 459 460 /*ARGSUSED*/ 461 static int 462 dlparam(struct tty *tp, struct termios *t) 463 { 464 /* 465 * All this kind of stuff (speed, character format, whatever) 466 * is set by jumpers on the card. Changing it is thus rather 467 * tricky for a mere device driver. 468 */ 469 return 0; 470 } 471 472 static void 473 dlbrk(struct dl_softc *sc, int state) 474 { 475 int s = spltty(); 476 477 if (state) { 478 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 479 DL_XCSR_TX_BREAK); 480 } else { 481 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 482 ~DL_XCSR_TX_BREAK); 483 } 484 splx(s); 485 } 486
Indexes created Wed Sep 24 02:09:48 GMT 2025