ofcons.c revision 1.10
1 /* $NetBSD: ofcons.c,v 1.10 2000/03/23 07:01:37 thorpej 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/param.h> 35 #include <sys/conf.h> 36 #include <sys/device.h> 37 #include <sys/proc.h> 38 #include <sys/systm.h> 39 #include <sys/callout.h> 40 #include <sys/tty.h> 41 42 #include <dev/cons.h> 43 44 #include <dev/ofw/openfirm.h> 45 46 struct ofcons_softc { 47 struct device of_dev; 48 struct tty *of_tty; 49 struct callout sc_poll_ch; 50 int of_flags; 51 }; 52 /* flags: */ 53 #define OFPOLL 1 54 55 #define OFBURSTLEN 128 /* max number of bytes to write in one chunk */ 56 57 static int stdin, stdout; 58 59 static int ofcons_match __P((struct device *, struct cfdata *, void *)); 60 static void ofcons_attach __P((struct device *, struct device *, void *)); 61 62 struct cfattach ofcons_ca = { 63 sizeof(struct ofcons_softc), ofcons_match, ofcons_attach 64 }; 65 66 extern struct cfdriver ofcons_cd; 67 68 static int ofcons_probe __P((void)); 69 70 static int 71 ofcons_match(parent, match, aux) 72 struct device *parent; 73 struct cfdata *match; 74 void *aux; 75 { 76 struct ofbus_attach_args *oba = aux; 77 78 if (strcmp(oba->oba_busname, "ofw")) 79 return (0); 80 if (!ofcons_probe()) 81 return 0; 82 return OF_instance_to_package(stdin) == oba->oba_phandle 83 || OF_instance_to_package(stdout) == oba->oba_phandle; 84 } 85 86 static void 87 ofcons_attach(parent, self, aux) 88 struct device *parent, *self; 89 void *aux; 90 { 91 printf("\n"); 92 93 callout_reset(&sc->sc_poll_ch); 94 } 95 96 static void ofcons_start __P((struct tty *)); 97 static int ofcons_param __P((struct tty *, struct termios *)); 98 static void ofcons_poll __P((void *)); 99 100 int 101 ofcons_open(dev, flag, mode, p) 102 dev_t dev; 103 int flag, mode; 104 struct proc *p; 105 { 106 struct ofcons_softc *sc; 107 int unit = minor(dev); 108 struct tty *tp; 109 110 if (unit >= ofcons_cd.cd_ndevs) 111 return ENXIO; 112 sc = ofcons_cd.cd_devs[unit]; 113 if (!sc) 114 return ENXIO; 115 if (!(tp = sc->of_tty)) 116 sc->of_tty = tp = ttymalloc(); 117 tp->t_oproc = ofcons_start; 118 tp->t_param = ofcons_param; 119 tp->t_dev = dev; 120 if (!(tp->t_state & TS_ISOPEN)) { 121 ttychars(tp); 122 tp->t_iflag = TTYDEF_IFLAG; 123 tp->t_oflag = TTYDEF_OFLAG; 124 tp->t_cflag = TTYDEF_CFLAG; 125 tp->t_lflag = TTYDEF_LFLAG; 126 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 127 ofcons_param(tp, &tp->t_termios); 128 ttsetwater(tp); 129 } else if ((tp->t_state&TS_XCLUDE) && suser(p->p_ucred, &p->p_acflag)) 130 return EBUSY; 131 tp->t_state |= TS_CARR_ON; 132 133 if (!(sc->of_flags & OFPOLL)) { 134 sc->of_flags |= OFPOLL; 135 callout_reset(&sc->sc_poll_ch, 1, ofcons_poll, 1); 136 } 137 138 return (*linesw[tp->t_line].l_open)(dev, tp); 139 } 140 141 int 142 ofcons_close(dev, flag, mode, p) 143 dev_t dev; 144 int flag, mode; 145 struct proc *p; 146 { 147 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 148 struct tty *tp = sc->of_tty; 149 150 callout_stop(&sc->sc_poll_ch); 151 sc->of_flags &= ~OFPOLL; 152 (*linesw[tp->t_line].l_close)(tp, flag); 153 ttyclose(tp); 154 return 0; 155 } 156 157 int 158 ofcons_read(dev, uio, flag) 159 dev_t dev; 160 struct uio *uio; 161 int flag; 162 { 163 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 164 struct tty *tp = sc->of_tty; 165 166 return (*linesw[tp->t_line].l_read)(tp, uio, flag); 167 } 168 169 int 170 ofcons_write(dev, uio, flag) 171 dev_t dev; 172 struct uio *uio; 173 int flag; 174 { 175 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 176 struct tty *tp = sc->of_tty; 177 178 return (*linesw[tp->t_line].l_write)(tp, uio, flag); 179 } 180 181 int 182 ofcons_ioctl(dev, cmd, data, flag, p) 183 dev_t dev; 184 u_long cmd; 185 caddr_t data; 186 int flag; 187 struct proc *p; 188 { 189 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 190 struct tty *tp = sc->of_tty; 191 int error; 192 193 if ((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p)) >= 0) 194 return error; 195 if ((error = ttioctl(tp, cmd, data, flag, p)) >= 0) 196 return error; 197 return ENOTTY; 198 } 199 200 struct tty * 201 ofcons_tty(dev) 202 dev_t dev; 203 { 204 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 205 206 return sc->of_tty; 207 } 208 209 void 210 ofcons_stop(tp, flag) 211 struct tty *tp; 212 int flag; 213 { 214 } 215 216 static void 217 ofcons_start(tp) 218 struct tty *tp; 219 { 220 struct clist *cl; 221 int s, len; 222 u_char buf[OFBURSTLEN]; 223 224 s = spltty(); 225 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 226 splx(s); 227 return; 228 } 229 tp->t_state |= TS_BUSY; 230 splx(s); 231 cl = &tp->t_outq; 232 len = q_to_b(cl, buf, OFBURSTLEN); 233 OF_write(stdout, buf, len); 234 s = spltty(); 235 tp->t_state &= ~TS_BUSY; 236 if (cl->c_cc) { 237 tp->t_state |= TS_TIMEOUT; 238 callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp); 239 } 240 if (cl->c_cc <= tp->t_lowat) { 241 if (tp->t_state & TS_ASLEEP) { 242 tp->t_state &= ~TS_ASLEEP; 243 wakeup(cl); 244 } 245 selwakeup(&tp->t_wsel); 246 } 247 splx(s); 248 } 249 250 static int 251 ofcons_param(tp, t) 252 struct tty *tp; 253 struct termios *t; 254 { 255 tp->t_ispeed = t->c_ispeed; 256 tp->t_ospeed = t->c_ospeed; 257 tp->t_cflag = t->c_cflag; 258 return 0; 259 } 260 261 static void 262 ofcons_poll(aux) 263 void *aux; 264 { 265 struct ofcons_softc *sc = aux; 266 struct tty *tp = sc->of_tty; 267 char ch; 268 269 while (OF_read(stdin, &ch, 1) > 0) { 270 if (tp && (tp->t_state & TS_ISOPEN)) 271 (*linesw[tp->t_line].l_rint)(ch, tp); 272 } 273 callout_reset(&sc->sc_poll_ch, 1, ofcons_poll, 1); 274 } 275 276 static int 277 ofcons_probe() 278 { 279 int chosen; 280 char stdinbuf[4], stdoutbuf[4]; 281 282 if (stdin) 283 return 1; 284 if ((chosen = OF_finddevice("/chosen")) == -1) 285 return 0; 286 if (OF_getprop(chosen, "stdin", stdinbuf, sizeof stdinbuf) != 287 sizeof stdinbuf || 288 OF_getprop(chosen, "stdout", stdoutbuf, sizeof stdoutbuf) != 289 sizeof stdoutbuf) 290 return 0; 291 292 /* Decode properties. */ 293 stdin = of_decode_int(stdinbuf); 294 stdout = of_decode_int(stdoutbuf); 295 296 return 1; 297 } 298 299 void 300 ofcons_cnprobe(cd) 301 struct consdev *cd; 302 { 303 int maj; 304 305 if (!ofcons_probe()) 306 return; 307 308 for (maj = 0; maj < nchrdev; maj++) 309 if (cdevsw[maj].d_open == ofcons_open) 310 break; 311 cd->cn_dev = makedev(maj, 0); 312 cd->cn_pri = CN_INTERNAL; 313 } 314 315 void 316 ofcons_cninit(cd) 317 struct consdev *cd; 318 { 319 } 320 321 int 322 ofcons_cngetc(dev) 323 dev_t dev; 324 { 325 unsigned char ch = '\0'; 326 int l; 327 328 while ((l = OF_read(stdin, &ch, 1)) != 1) 329 if (l != -2 && l != 0) 330 return -1; 331 return ch; 332 } 333 334 void 335 ofcons_cnputc(dev, c) 336 dev_t dev; 337 int c; 338 { 339 char ch = c; 340 341 OF_write(stdout, &ch, 1); 342 } 343 344 void 345 ofcons_cnpollc(dev, on) 346 dev_t dev; 347 int on; 348 { 349 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 350 351 if (!sc) 352 return; 353 if (on) { 354 if (sc->of_flags & OFPOLL) 355 callout_stop(&sc->sc_poll_ch); 356 sc->of_flags &= ~OFPOLL; 357 } else { 358 if (!(sc->of_flags & OFPOLL)) { 359 sc->of_flags |= OFPOLL; 360 callout_reset(&sc->sc_poll_ch, 1, ofcons_poll, sc); 361 } 362 } 363 } 364
Indexes created Wed Sep 24 15:09:51 GMT 2025