1 /* $NetBSD: dl.c,v 1.20 2002/03/17 19:41:01 atatat 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 1.20 2002/03/17 19:41:01 atatat 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 struct tty * dltty (dev_t); 125 126 cdev_decl(dl); 127 128 struct cfattach dl_ca = { 129 sizeof(struct dl_softc), dl_match, dl_attach 130 }; 131 132 #define DL_READ_WORD(reg) \ 133 bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) 134 #define DL_WRITE_WORD(reg, val) \ 135 bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) 136 #define DL_WRITE_BYTE(reg, val) \ 137 bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) 138 139 /* Autoconfig handles: setup the controller to interrupt, */ 140 /* then complete the housecleaning for full operation */ 141 142 static int 143 dl_match (struct device *parent, struct cfdata *cf, void *aux) 144 { 145 struct uba_attach_args *ua = aux; 146 147 #ifdef DL_DEBUG 148 printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); 149 #endif 150 151 bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); 152 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 153 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 154 #ifdef DL_DEBUG 155 printf("failed (step 1; XCSR = %.4b)\n", 156 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 157 DL_XCSR_BITS); 158 #endif 159 return 0; 160 } 161 162 /* 163 * We have to force an interrupt so the uba driver can work 164 * out where we are. Unfortunately, the only way to make a 165 * DL11 interrupt is to get it to send or receive a 166 * character. We'll send a NUL and hope it doesn't hurt 167 * anything. 168 */ 169 170 bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); 171 #if 0 /* This test seems to fail 2/3 of the time :-( */ 172 if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { 173 #ifdef DL_DEBUG 174 printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, 175 DL_XCSR_BITS); 176 #endif 177 return 0; 178 } 179 #endif 180 DELAY(100000); /* delay 1/10 s for character to transmit */ 181 if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != 182 (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { 183 #ifdef DL_DEBUG 184 printf("failed (step 3; XCSR = %.4b)\n", 185 bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), 186 DL_XCSR_BITS); 187 #endif 188 return 0; 189 } 190 191 192 /* What else do I need to do? */ 193 194 return 1; 195 196 } 197 198 static void 199 dl_attach (struct device *parent, struct device *self, void *aux) 200 { 201 struct dl_softc *sc = (void *)self; 202 struct uba_attach_args *ua = aux; 203 204 sc->sc_iot = ua->ua_iot; 205 sc->sc_ioh = ua->ua_ioh; 206 207 /* Tidy up the device */ 208 209 DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); 210 DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); 211 212 /* Initialize our softc structure. Should be done in open? */ 213 214 sc->sc_tty = ttymalloc(); 215 tty_attach(sc->sc_tty); 216 217 /* Now register the TX & RX interrupt handlers */ 218 uba_intr_establish(ua->ua_icookie, ua->ua_cvec, 219 dlxint, sc, &sc->sc_tintrcnt); 220 uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, 221 dlrint, sc, &sc->sc_rintrcnt); 222 evcnt_attach_dynamic(&sc->sc_rintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 223 sc->sc_dev.dv_xname, "rintr"); 224 evcnt_attach_dynamic(&sc->sc_tintrcnt, EVCNT_TYPE_INTR, ua->ua_evcnt, 225 sc->sc_dev.dv_xname, "tintr"); 226 227 printf("\n"); 228 } 229 230 /* Receiver Interrupt Handler */ 231 232 static void 233 dlrint(void *arg) 234 { 235 struct dl_softc *sc = arg; 236 237 if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { 238 struct tty *tp = sc->sc_tty; 239 unsigned c; 240 int cc; 241 242 c = DL_READ_WORD(DL_UBA_RBUF); 243 cc = c & 0xFF; 244 245 if (!(tp->t_state & TS_ISOPEN)) { 246 wakeup((caddr_t)&tp->t_rawq); 247 return; 248 } 249 250 if (c & DL_RBUF_OVERRUN_ERR) { 251 /* 252 * XXX: This should really be logged somwhere 253 * else where we can afford the time. 254 */ 255 log(LOG_WARNING, "%s: rx overrun\n", 256 sc->sc_dev.dv_xname); 257 } 258 if (c & DL_RBUF_FRAMING_ERR) 259 cc |= TTY_FE; 260 if (c & DL_RBUF_PARITY_ERR) 261 cc |= TTY_PE; 262 263 (*tp->t_linesw->l_rint)(cc, tp); 264 #if defined(DIAGNOSTIC) 265 } else { 266 log(LOG_WARNING, "%s: stray rx interrupt\n", 267 sc->sc_dev.dv_xname); 268 #endif 269 } 270 } 271 272 /* Transmitter Interrupt Handler */ 273 274 static void 275 dlxint(void *arg) 276 { 277 struct dl_softc *sc = arg; 278 struct tty *tp = sc->sc_tty; 279 280 tp->t_state &= ~(TS_BUSY | TS_FLUSH); 281 (*tp->t_linesw->l_start)(tp); 282 283 return; 284 } 285 286 int 287 dlopen(dev_t dev, int flag, int mode, struct proc *p) 288 { 289 struct tty *tp; 290 struct dl_softc *sc; 291 int unit; 292 293 unit = minor(dev); 294 295 if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL) 296 return ENXIO; 297 sc = dl_cd.cd_devs[unit]; 298 299 tp = sc->sc_tty; 300 if (tp == NULL) 301 return ENODEV; 302 tp->t_oproc = dlstart; 303 tp->t_param = dlparam; 304 tp->t_dev = dev; 305 306 if (!(tp->t_state & TS_ISOPEN)) { 307 ttychars(tp); 308 tp->t_iflag = TTYDEF_IFLAG; 309 tp->t_oflag = TTYDEF_OFLAG; 310 /* No modem control, so set CLOCAL. */ 311 tp->t_cflag = TTYDEF_CFLAG | CLOCAL; 312 tp->t_lflag = TTYDEF_LFLAG; 313 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 314 315 dlparam(tp, &tp->t_termios); 316 ttsetwater(tp); 317 318 } else if ((tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0) 319 return EBUSY; 320 321 return ((*tp->t_linesw->l_open)(dev, tp)); 322 } 323 324 /*ARGSUSED*/ 325 int 326 dlclose(dev_t dev, int flag, int mode, struct proc *p) 327 { 328 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 329 struct tty *tp = sc->sc_tty; 330 331 (*tp->t_linesw->l_close)(tp, flag); 332 333 /* Make sure a BREAK state is not left enabled. */ 334 dlbrk(sc, 0); 335 336 return (ttyclose(tp)); 337 } 338 339 int 340 dlread(dev_t dev, struct uio *uio, int flag) 341 { 342 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 343 struct tty *tp = sc->sc_tty; 344 345 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 346 } 347 348 int 349 dlwrite(dev_t dev, struct uio *uio, int flag) 350 { 351 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 352 struct tty *tp = sc->sc_tty; 353 354 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 355 } 356 357 int 358 dlpoll(dev_t dev, int events, struct proc *p) 359 { 360 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 361 struct tty *tp = sc->sc_tty; 362 363 return ((*tp->t_linesw->l_poll)(tp, events, p)); 364 } 365 366 int 367 dlioctl(dev_t dev, unsigned long cmd, caddr_t data, int flag, struct proc *p) 368 { 369 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 370 struct tty *tp = sc->sc_tty; 371 int error; 372 373 374 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); 375 if (error != EPASSTHROUGH) 376 return (error); 377 378 error = ttioctl(tp, cmd, data, flag, p); 379 if (error != EPASSTHROUGH) 380 return (error); 381 382 switch (cmd) { 383 384 case TIOCSBRK: 385 dlbrk(sc, 1); 386 break; 387 388 case TIOCCBRK: 389 dlbrk(sc, 0); 390 break; 391 392 case TIOCMGET: 393 /* No modem control, assume they're all low. */ 394 *(int *)data = 0; 395 break; 396 397 default: 398 return (EPASSTHROUGH); 399 } 400 return (0); 401 } 402 403 struct tty * 404 dltty(dev_t dev) 405 { 406 struct dl_softc *sc = dl_cd.cd_devs[minor(dev)]; 407 408 return sc->sc_tty; 409 } 410 411 void 412 dlstop(struct tty *tp, int flag) 413 { 414 int s = spltty(); 415 416 if ((tp->t_state & (TS_BUSY|TS_TTSTOP)) == TS_BUSY) 417 tp->t_state |= TS_FLUSH; 418 splx(s); 419 } 420 421 static void 422 dlstart(struct tty *tp) 423 { 424 struct dl_softc *sc = dl_cd.cd_devs[minor(tp->t_dev)]; 425 int s = spltty(); 426 427 if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) 428 goto out; 429 if (tp->t_outq.c_cc <= tp->t_lowat) { 430 if (tp->t_state & TS_ASLEEP) { 431 tp->t_state &= ~TS_ASLEEP; 432 wakeup((caddr_t)&tp->t_outq); 433 } 434 selwakeup(&tp->t_wsel); 435 } 436 if (tp->t_outq.c_cc == 0) 437 goto out; 438 439 440 if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { 441 tp->t_state |= TS_BUSY; 442 DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); 443 } 444 out: 445 splx(s); 446 return; 447 } 448 449 /*ARGSUSED*/ 450 static int 451 dlparam(struct tty *tp, struct termios *t) 452 { 453 /* 454 * All this kind of stuff (speed, character format, whatever) 455 * is set by jumpers on the card. Changing it is thus rather 456 * tricky for a mere device driver. 457 */ 458 return 0; 459 } 460 461 static void 462 dlbrk(struct dl_softc *sc, int state) 463 { 464 int s = spltty(); 465 466 if (state) { 467 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | 468 DL_XCSR_TX_BREAK); 469 } else { 470 DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & 471 ~DL_XCSR_TX_BREAK); 472 } 473 splx(s); 474 } 475