ofcons.c revision 1.24
1 /* $NetBSD: ofcons.c,v 1.24 2005/12/11 12:22:48 christos Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ofcons.c,v 1.24 2005/12/11 12:22:48 christos Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/proc.h> 41 #include <sys/systm.h> 42 #include <sys/callout.h> 43 #include <sys/tty.h> 44 45 #include <dev/cons.h> 46 47 #include <dev/ofw/openfirm.h> 48 49 struct ofcons_softc { 50 struct device of_dev; 51 struct tty *of_tty; 52 struct callout sc_poll_ch; 53 int of_flags; 54 }; 55 /* flags: */ 56 #define OFPOLL 1 57 58 #define OFBURSTLEN 128 /* max number of bytes to write in one chunk */ 59 60 cons_decl(ofcons_); 61 62 static int stdin, stdout; 63 64 static int ofcons_match(struct device *, struct cfdata *, void *); 65 static void ofcons_attach(struct device *, struct device *, void *); 66 67 CFATTACH_DECL(ofcons, sizeof(struct ofcons_softc), 68 ofcons_match, ofcons_attach, NULL, NULL); 69 70 extern struct cfdriver ofcons_cd; 71 72 dev_type_open(ofcons_open); 73 dev_type_close(ofcons_close); 74 dev_type_read(ofcons_read); 75 dev_type_write(ofcons_write); 76 dev_type_ioctl(ofcons_ioctl); 77 dev_type_tty(ofcons_tty); 78 dev_type_poll(ofcons_poll); 79 80 const struct cdevsw ofcons_cdevsw = { 81 ofcons_open, ofcons_close, ofcons_read, ofcons_write, ofcons_ioctl, 82 nostop, ofcons_tty, ofcons_poll, nommap, ttykqfilter, D_TTY 83 }; 84 85 static int ofcons_probe(void); 86 87 static int 88 ofcons_match(parent, match, aux) 89 struct device *parent; 90 struct cfdata *match; 91 void *aux; 92 { 93 struct ofbus_attach_args *oba = aux; 94 95 if (strcmp(oba->oba_busname, "ofw")) 96 return (0); 97 if (!ofcons_probe()) 98 return 0; 99 return OF_instance_to_package(stdin) == oba->oba_phandle 100 || OF_instance_to_package(stdout) == oba->oba_phandle; 101 } 102 103 static void 104 ofcons_attach(parent, self, aux) 105 struct device *parent, *self; 106 void *aux; 107 { 108 struct ofcons_softc *sc = (struct ofcons_softc *) self; 109 110 printf("\n"); 111 112 callout_init(&sc->sc_poll_ch); 113 } 114 115 static void ofcons_start(struct tty *); 116 static int ofcons_param(struct tty *, struct termios *); 117 static void ofcons_pollin(void *); 118 119 int 120 ofcons_open(dev, flag, mode, l) 121 dev_t dev; 122 int flag, mode; 123 struct lwp *l; 124 { 125 struct ofcons_softc *sc; 126 int unit = minor(dev); 127 struct tty *tp; 128 129 if (unit >= ofcons_cd.cd_ndevs) 130 return ENXIO; 131 sc = ofcons_cd.cd_devs[unit]; 132 if (!sc) 133 return ENXIO; 134 if (!(tp = sc->of_tty)) 135 sc->of_tty = tp = ttymalloc(); 136 tp->t_oproc = ofcons_start; 137 tp->t_param = ofcons_param; 138 tp->t_dev = dev; 139 if (!(tp->t_state & TS_ISOPEN)) { 140 ttychars(tp); 141 tp->t_iflag = TTYDEF_IFLAG; 142 tp->t_oflag = TTYDEF_OFLAG; 143 tp->t_cflag = TTYDEF_CFLAG; 144 tp->t_lflag = TTYDEF_LFLAG; 145 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 146 ofcons_param(tp, &tp->t_termios); 147 ttsetwater(tp); 148 } else if ((tp->t_state&TS_XCLUDE) && 149 suser(l->l_proc->p_ucred, &l->l_proc->p_acflag)) 150 return EBUSY; 151 tp->t_state |= TS_CARR_ON; 152 153 if (!(sc->of_flags & OFPOLL)) { 154 sc->of_flags |= OFPOLL; 155 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 156 } 157 158 return (*tp->t_linesw->l_open)(dev, tp); 159 } 160 161 int 162 ofcons_close(dev, flag, mode, l) 163 dev_t dev; 164 int flag, mode; 165 struct lwp *l; 166 { 167 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 168 struct tty *tp = sc->of_tty; 169 170 callout_stop(&sc->sc_poll_ch); 171 sc->of_flags &= ~OFPOLL; 172 (*tp->t_linesw->l_close)(tp, flag); 173 ttyclose(tp); 174 return 0; 175 } 176 177 int 178 ofcons_read(dev, uio, flag) 179 dev_t dev; 180 struct uio *uio; 181 int flag; 182 { 183 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 184 struct tty *tp = sc->of_tty; 185 186 return (*tp->t_linesw->l_read)(tp, uio, flag); 187 } 188 189 int 190 ofcons_write(dev, uio, flag) 191 dev_t dev; 192 struct uio *uio; 193 int flag; 194 { 195 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 196 struct tty *tp = sc->of_tty; 197 198 return (*tp->t_linesw->l_write)(tp, uio, flag); 199 } 200 201 int 202 ofcons_poll(dev, events, l) 203 dev_t dev; 204 int events; 205 struct lwp *l; 206 { 207 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 208 struct tty *tp = sc->of_tty; 209 210 return ((*tp->t_linesw->l_poll)(tp, events, l)); 211 } 212 int 213 ofcons_ioctl(dev, cmd, data, flag, l) 214 dev_t dev; 215 u_long cmd; 216 caddr_t data; 217 int flag; 218 struct lwp *l; 219 { 220 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 221 struct tty *tp = sc->of_tty; 222 int error; 223 224 if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l)) != EPASSTHROUGH) 225 return error; 226 return ttioctl(tp, cmd, data, flag, l); 227 } 228 229 struct tty * 230 ofcons_tty(dev) 231 dev_t dev; 232 { 233 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 234 235 return sc->of_tty; 236 } 237 238 static void 239 ofcons_start(tp) 240 struct tty *tp; 241 { 242 struct clist *cl; 243 int s, len; 244 u_char buf[OFBURSTLEN]; 245 246 s = spltty(); 247 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 248 splx(s); 249 return; 250 } 251 tp->t_state |= TS_BUSY; 252 splx(s); 253 cl = &tp->t_outq; 254 len = q_to_b(cl, buf, OFBURSTLEN); 255 OF_write(stdout, buf, len); 256 s = spltty(); 257 tp->t_state &= ~TS_BUSY; 258 if (cl->c_cc) { 259 tp->t_state |= TS_TIMEOUT; 260 callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp); 261 } 262 if (cl->c_cc <= tp->t_lowat) { 263 if (tp->t_state & TS_ASLEEP) { 264 tp->t_state &= ~TS_ASLEEP; 265 wakeup(cl); 266 } 267 selwakeup(&tp->t_wsel); 268 } 269 splx(s); 270 } 271 272 static int 273 ofcons_param(tp, t) 274 struct tty *tp; 275 struct termios *t; 276 { 277 tp->t_ispeed = t->c_ispeed; 278 tp->t_ospeed = t->c_ospeed; 279 tp->t_cflag = t->c_cflag; 280 return 0; 281 } 282 283 static void 284 ofcons_pollin(aux) 285 void *aux; 286 { 287 struct ofcons_softc *sc = aux; 288 struct tty *tp = sc->of_tty; 289 char ch; 290 291 while (OF_read(stdin, &ch, 1) > 0) { 292 if (tp && (tp->t_state & TS_ISOPEN)) 293 (*tp->t_linesw->l_rint)(ch, tp); 294 } 295 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 296 } 297 298 static int 299 ofcons_probe() 300 { 301 int chosen; 302 char stdinbuf[4], stdoutbuf[4]; 303 304 if (stdin) 305 return 1; 306 if ((chosen = OF_finddevice("/chosen")) == -1) 307 return 0; 308 if (OF_getprop(chosen, "stdin", stdinbuf, sizeof stdinbuf) != 309 sizeof stdinbuf || 310 OF_getprop(chosen, "stdout", stdoutbuf, sizeof stdoutbuf) != 311 sizeof stdoutbuf) 312 return 0; 313 314 /* Decode properties. */ 315 stdin = of_decode_int(stdinbuf); 316 stdout = of_decode_int(stdoutbuf); 317 318 return 1; 319 } 320 321 void 322 ofcons_cnprobe(cd) 323 struct consdev *cd; 324 { 325 int maj; 326 327 if (!ofcons_probe()) 328 return; 329 330 maj = cdevsw_lookup_major(&ofcons_cdevsw); 331 cd->cn_dev = makedev(maj, 0); 332 cd->cn_pri = CN_INTERNAL; 333 } 334 335 void 336 ofcons_cninit(cd) 337 struct consdev *cd; 338 { 339 } 340 341 int 342 ofcons_cngetc(dev) 343 dev_t dev; 344 { 345 unsigned char ch = '\0'; 346 int l; 347 348 while ((l = OF_read(stdin, &ch, 1)) != 1) 349 if (l != -2 && l != 0) 350 return -1; 351 return ch; 352 } 353 354 void 355 ofcons_cnputc(dev, c) 356 dev_t dev; 357 int c; 358 { 359 char ch = c; 360 361 OF_write(stdout, &ch, 1); 362 } 363 364 void 365 ofcons_cnpollc(dev, on) 366 dev_t dev; 367 int on; 368 { 369 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 370 371 if (!sc) 372 return; 373 if (on) { 374 if (sc->of_flags & OFPOLL) 375 callout_stop(&sc->sc_poll_ch); 376 sc->of_flags &= ~OFPOLL; 377 } else { 378 if (!(sc->of_flags & OFPOLL)) { 379 sc->of_flags |= OFPOLL; 380 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 381 } 382 } 383 } 384
Indexes created Wed Sep 24 05:09:52 GMT 2025