ofcons.c revision 1.22
1 /* $NetBSD: ofcons.c,v 1.22 2005/02/04 02:10:44 perry 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 1.22 2005/02/04 02:10:44 perry 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, p) 121 dev_t dev; 122 int flag, mode; 123 struct proc *p; 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) && suser(p->p_ucred, &p->p_acflag)) 149 return EBUSY; 150 tp->t_state |= TS_CARR_ON; 151 152 if (!(sc->of_flags & OFPOLL)) { 153 sc->of_flags |= OFPOLL; 154 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 155 } 156 157 return (*tp->t_linesw->l_open)(dev, tp); 158 } 159 160 int 161 ofcons_close(dev, flag, mode, p) 162 dev_t dev; 163 int flag, mode; 164 struct proc *p; 165 { 166 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 167 struct tty *tp = sc->of_tty; 168 169 callout_stop(&sc->sc_poll_ch); 170 sc->of_flags &= ~OFPOLL; 171 (*tp->t_linesw->l_close)(tp, flag); 172 ttyclose(tp); 173 return 0; 174 } 175 176 int 177 ofcons_read(dev, uio, flag) 178 dev_t dev; 179 struct uio *uio; 180 int flag; 181 { 182 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 183 struct tty *tp = sc->of_tty; 184 185 return (*tp->t_linesw->l_read)(tp, uio, flag); 186 } 187 188 int 189 ofcons_write(dev, uio, flag) 190 dev_t dev; 191 struct uio *uio; 192 int flag; 193 { 194 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 195 struct tty *tp = sc->of_tty; 196 197 return (*tp->t_linesw->l_write)(tp, uio, flag); 198 } 199 200 int 201 ofcons_poll(dev, events, p) 202 dev_t dev; 203 int events; 204 struct proc *p; 205 { 206 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 207 struct tty *tp = sc->of_tty; 208 209 return ((*tp->t_linesw->l_poll)(tp, events, p)); 210 } 211 int 212 ofcons_ioctl(dev, cmd, data, flag, p) 213 dev_t dev; 214 u_long cmd; 215 caddr_t data; 216 int flag; 217 struct proc *p; 218 { 219 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 220 struct tty *tp = sc->of_tty; 221 int error; 222 223 if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p)) != EPASSTHROUGH) 224 return error; 225 return ttioctl(tp, cmd, data, flag, p); 226 } 227 228 struct tty * 229 ofcons_tty(dev) 230 dev_t dev; 231 { 232 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 233 234 return sc->of_tty; 235 } 236 237 static void 238 ofcons_start(tp) 239 struct tty *tp; 240 { 241 struct clist *cl; 242 int s, len; 243 u_char buf[OFBURSTLEN]; 244 245 s = spltty(); 246 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 247 splx(s); 248 return; 249 } 250 tp->t_state |= TS_BUSY; 251 splx(s); 252 cl = &tp->t_outq; 253 len = q_to_b(cl, buf, OFBURSTLEN); 254 OF_write(stdout, buf, len); 255 s = spltty(); 256 tp->t_state &= ~TS_BUSY; 257 if (cl->c_cc) { 258 tp->t_state |= TS_TIMEOUT; 259 callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp); 260 } 261 if (cl->c_cc <= tp->t_lowat) { 262 if (tp->t_state & TS_ASLEEP) { 263 tp->t_state &= ~TS_ASLEEP; 264 wakeup(cl); 265 } 266 selwakeup(&tp->t_wsel); 267 } 268 splx(s); 269 } 270 271 static int 272 ofcons_param(tp, t) 273 struct tty *tp; 274 struct termios *t; 275 { 276 tp->t_ispeed = t->c_ispeed; 277 tp->t_ospeed = t->c_ospeed; 278 tp->t_cflag = t->c_cflag; 279 return 0; 280 } 281 282 static void 283 ofcons_pollin(aux) 284 void *aux; 285 { 286 struct ofcons_softc *sc = aux; 287 struct tty *tp = sc->of_tty; 288 char ch; 289 290 while (OF_read(stdin, &ch, 1) > 0) { 291 if (tp && (tp->t_state & TS_ISOPEN)) 292 (*tp->t_linesw->l_rint)(ch, tp); 293 } 294 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 295 } 296 297 static int 298 ofcons_probe() 299 { 300 int chosen; 301 char stdinbuf[4], stdoutbuf[4]; 302 303 if (stdin) 304 return 1; 305 if ((chosen = OF_finddevice("/chosen")) == -1) 306 return 0; 307 if (OF_getprop(chosen, "stdin", stdinbuf, sizeof stdinbuf) != 308 sizeof stdinbuf || 309 OF_getprop(chosen, "stdout", stdoutbuf, sizeof stdoutbuf) != 310 sizeof stdoutbuf) 311 return 0; 312 313 /* Decode properties. */ 314 stdin = of_decode_int(stdinbuf); 315 stdout = of_decode_int(stdoutbuf); 316 317 return 1; 318 } 319 320 void 321 ofcons_cnprobe(cd) 322 struct consdev *cd; 323 { 324 int maj; 325 326 if (!ofcons_probe()) 327 return; 328 329 maj = cdevsw_lookup_major(&ofcons_cdevsw); 330 cd->cn_dev = makedev(maj, 0); 331 cd->cn_pri = CN_INTERNAL; 332 } 333 334 void 335 ofcons_cninit(cd) 336 struct consdev *cd; 337 { 338 } 339 340 int 341 ofcons_cngetc(dev) 342 dev_t dev; 343 { 344 unsigned char ch = '\0'; 345 int l; 346 347 while ((l = OF_read(stdin, &ch, 1)) != 1) 348 if (l != -2 && l != 0) 349 return -1; 350 return ch; 351 } 352 353 void 354 ofcons_cnputc(dev, c) 355 dev_t dev; 356 int c; 357 { 358 char ch = c; 359 360 OF_write(stdout, &ch, 1); 361 } 362 363 void 364 ofcons_cnpollc(dev, on) 365 dev_t dev; 366 int on; 367 { 368 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 369 370 if (!sc) 371 return; 372 if (on) { 373 if (sc->of_flags & OFPOLL) 374 callout_stop(&sc->sc_poll_ch); 375 sc->of_flags &= ~OFPOLL; 376 } else { 377 if (!(sc->of_flags & OFPOLL)) { 378 sc->of_flags |= OFPOLL; 379 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 380 } 381 } 382 } 383
Indexes created Wed Sep 24 05:09:52 GMT 2025