dl.c revision 1.18
1 /* $NetBSD: dl.c,v 1.18 2001/05/26 21:24:38 ragge 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/param.h> 84 #include <sys/systm.h> 85 #include <sys/ioctl.h> 86 #include <sys/tty.h> 87 #include <sys/proc.h> 88 #include <sys/map.h> 89 #include <sys/buf.h> 90 #include <sys/conf.h> 91 #include <sys/file.h> 92 #include <sys/uio.h> 93 #include <sys/kernel.h> 94 #include <sys/syslog.h> 95 #include <sys/device.h> 96 97 #include <machine/bus.h> 98 99 #include <dev/qbus/ubavar.h> 100 101 #include <dev/qbus/dlreg.h> 102 103 #include "ioconf.h" 104 105 struct dl_softc { 106 struct device sc_dev; 107 struct evcnt sc_rintrcnt; 108 struct evcnt sc_tintrcnt; 109 bus_space_tag_t sc_iot; 110 bus_space_handle_t sc_ioh; 111 struct tty *sc_tty; 112 }; 113 114 static int dl_match (struct device *, struct cfdata *, void *); 115 static void dl_attach (struct device *, struct device *, void *); 116 static void dlrint (void *); 117 static void dlxint (void *); 118 static void dlstart (struct tty *); 119 static int dlparam (struct tty *, struct termios *); 120 static void dlbrk (struct dl_softc *, int); 121 struct tty * dltty (dev_t); 122 123 cdev_decl(dl); 124 125 struct cfattach dl_ca = { 126 sizeof(struct dl_softc), dl_match, dl_attach 127 }; 128 129 #define DL_READ_WORD(reg) \ 130 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 131 #define DL_WRITE_WORD(reg, val) \ 132 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 133 #define DL_WRITE_BYTE(reg, val) \ 134 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 135 136 /* Autoconfig handles: setup the controller to interrupt, */ 137 /* then complete the housecleaning for full operation */ 138 139 static int 140 dl_match (struct device *parent, struct cfdata *cf, void *aux) 141 { 142 struct uba_attach_args *ua = aux; 143 144 #ifdef DL_DEBUG 145 printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); 146 #endif 147 148 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); 149 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 150 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 151 #ifdef DL_DEBUG 152 printf("failed (step 1; XCSR = %.4b)\n", 153 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 154 DL_XCSR_BITS); 155 #endif 156 return 0; 157 } 158 159 /* 160 * We have to force an interrupt so the uba driver can work 161 * out where we are. Unfortunately, the only way to make a 162 * DL11 interrupt is to get it to send or receive a 163 * character. We'll send a NUL and hope it doesn't hurt 164 * anything. 165 */ 166 167 bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); 168 #if 0 /* This test seems to fail 2/3 of the time :-( */ 169 if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { 170 #ifdef DL_DEBUG 171 printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, 172 DL_XCSR_BITS); 173 #endif 174 return 0; 175 } 176 #endif 177 DELAY(100000); /* delay 1/10 s for character to transmit */ 178 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 179 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 180 #ifdef DL_DEBUG 181 printf("failed (step 3; XCSR = %.4b)\n", 182 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 183 DL_XCSR_BITS); 184 #endif 185 return 0; 186 } 187 188 189 /* What else do I need to do? */ 190 191 return 1; 192 193 } 194 195 static void 196 dl_attach (struct device *parent, struct device *self, void *aux) 197 { 198 struct dl_softc *sc = (void *)self; 199 struct uba_attach_args *ua = aux; 200 201 sc->sc_iot = ua->ua_iot; 202 sc->sc_ioh = ua->ua_ioh; 203 204 /* Tidy up the device */ 205 206 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 207 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 208 209 /* Initialize our softc structure. Should be done in open? */ 210 211 sc->sc_tty = ttymalloc(); 212 tty_attach(sc->sc_tty); 213 214 /* Now register the TX & RX interrupt handlers */ 215 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 216 dlxint, sc, &sc->sc_tintrcnt); 217 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 218 dlrint, sc, &sc->sc_rintrcnt); 219 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 220 sc->sc_dev.dv_xname, "rintr"); 221 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 222 sc->sc_dev.dv_xname, "tintr"); 223 224 printf("\n"); 225 } 226 227 /* Receiver Interrupt Handler */ 228 229 static void 230 dlrint(void *arg) 231 { 232 struct dl_softc *sc = arg; 233 234 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 235 struct tty *tp = sc->sc_tty; 236 unsigned c; 237 int cc; 238 239 c = DL_READ_WORD(DL_UBA_RBUF); 240 cc = c & 0xFF; 241 242 if (!(tp->t_state & TS_ISOPEN)) { 243 wakeup((caddr_t)&tp->t_rawq); 244 return; 245 } 246 247 if (c & DL_RBUF_OVERRUN_ERR) { 248 /* 249 * XXX: This should really be logged somwhere 250 * else where we can afford the time. 251 */ 252 log(LOG_WARNING, "%s: rx overrun\n", 253 sc->sc_dev.dv_xname); 254 } 255 if (c & DL_RBUF_FRAMING_ERR) 256 cc |= TTY_FE; 257 if (c & DL_RBUF_PARITY_ERR) 258 cc |= TTY_PE; 259 260 (*tp->t_linesw->l_rint)(cc, tp); 261 #if defined(DIAGNOSTIC) 262 } else { 263 log(LOG_WARNING, "%s: stray rx interrupt\n", 264 sc->sc_dev.dv_xname); 265 #endif 266 } 267 } 268 269 /* Transmitter Interrupt Handler */ 270 271 static void 272 dlxint(void *arg) 273 { 274 struct dl_softc *sc = arg; 275 struct tty *tp = sc->sc_tty; 276 277 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 278 (*tp->t_linesw->l_start)(tp); 279 280 return; 281 } 282 283 int 284 dlopen(dev_t dev, int flag, int mode, struct proc *p) 285 { 286 struct tty *tp; 287 struct dl_softc *sc; 288 int unit; 289 290 unit = minor(dev); 291 292 if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL) 293 return ENXIO; 294 sc = dl_cd.cd_devs[unit]; 295 296 tp = sc->sc_tty; 297 if (tp == NULL) 298 return ENODEV; 299 tp->t_oproc = dlstart; 300 tp->t_param = dlparam; 301 tp->t_dev = dev; 302 303 if (!(tp->t_state & TS_ISOPEN)) { 304 ttychars(tp); 305 tp->t_iflag = TTYDEF_IFLAG; 306 tp->t_oflag = TTYDEF_OFLAG; 307 /* No modem control, so set CLOCAL. */ 308 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 309 tp->t_lflag = TTYDEF_LFLAG; 310 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 311 312 dlparam(tp, &tp->t_termios); 313 ttsetwater(tp); 314 315 } else if ((tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0) 316 return EBUSY; 317 318 return ((*tp->t_linesw->l_open)(dev, tp)); 319 } 320 321 /*ARGSUSED*/ 322 int 323 dlclose(dev_t dev, int flag, int mode, struct proc *p) 324 { 325 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 326 struct tty *tp = sc->sc_tty; 327 328 (*tp->t_linesw->l_close)(tp, flag); 329 330 /* Make sure a BREAK state is not left enabled. */ 331 dlbrk(sc, 0); 332 333 return (ttyclose(tp)); 334 } 335 336 int 337 dlread(dev_t dev, struct uio *uio, int flag) 338 { 339 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 340 struct tty *tp = sc->sc_tty; 341 342 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 343 } 344 345 int 346 dlwrite(dev_t dev, struct uio *uio, int flag) 347 { 348 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 349 struct tty *tp = sc->sc_tty; 350 351 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 352 } 353 354 int 355 dlpoll(dev_t dev, int events, struct proc *p) 356 { 357 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 358 struct tty *tp = sc->sc_tty; 359 360 return ((*tp->t_linesw->l_poll)(tp, events, p)); 361 } 362 363 int 364 dlioctl(dev_t dev, unsigned long cmd, caddr_t data, int flag, struct proc *p) 365 { 366 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 367 struct tty *tp = sc->sc_tty; 368 int error; 369 370 371 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 372 if (error >= 0) 373 return (error); 374 error = ttioctl(tp, cmd, data, flag, p); 375 if (error >= 0) 376 return (error); 377 378 switch (cmd) { 379 380 case TIOCSBRK: 381 dlbrk(sc, 1); 382 break; 383 384 case TIOCCBRK: 385 dlbrk(sc, 0); 386 break; 387 388 case TIOCMGET: 389 /* No modem control, assume they're all low. */ 390 *(int *)data = 0; 391 break; 392 393 default: 394 return (ENOTTY); 395 } 396 return (0); 397 } 398 399 struct tty * 400 dltty(dev_t dev) 401 { 402 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 403 404 return sc->sc_tty; 405 } 406 407 void 408 dlstop(struct tty *tp, int flag) 409 { 410 int s = spltty(); 411 412 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 413 tp->t_state |= TS_FLUSH; 414 splx(s); 415 } 416 417 static void 418 dlstart(struct tty *tp) 419 { 420 struct dl_softc *sc = dl_cd.cd_devs[minor(tp->t_dev)]; 421 int s = spltty(); 422 423 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 424 goto out; 425 if (tp->t_outq.c_cc <= tp->t_lowat) { 426 if (tp->t_state & TS_ASLEEP) { 427 tp->t_state &= ~TS_ASLEEP; 428 wakeup((caddr_t)&tp->t_outq); 429 } 430 selwakeup(&tp->t_wsel); 431 } 432 if (tp->t_outq.c_cc == 0) 433 goto out; 434 435 436 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 437 tp->t_state |= TS_BUSY; 438 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 439 } 440 out: 441 splx(s); 442 return; 443 } 444 445 /*ARGSUSED*/ 446 static int 447 dlparam(struct tty *tp, struct termios *t) 448 { 449 /* 450 * All this kind of stuff (speed, character format, whatever) 451 * is set by jumpers on the card. Changing it is thus rather 452 * tricky for a mere device driver. 453 */ 454 return 0; 455 } 456 457 static void 458 dlbrk(struct dl_softc *sc, int state) 459 { 460 int s = spltty(); 461 462 if (state) { 463 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 464 DL_XCSR_TX_BREAK); 465 } else { 466 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 467 ~DL_XCSR_TX_BREAK); 468 } 469 splx(s); 470 } 471
Indexes created Sun Oct 19 19:09:49 GMT 2025