1 /* $NetBSD: ofcons.c,v 1.16 2002/03/17 19:40:59 atatat 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 1.16 2002/03/17 19:40:59 atatat 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 cdev_decl(ofcons_); 61 cons_decl(ofcons_); 62 63 static int stdin, stdout; 64 65 static int ofcons_match __P((struct device *, struct cfdata *, void *)); 66 static void ofcons_attach __P((struct device *, struct device *, void *)); 67 68 struct cfattach ofcons_ca = { 69 sizeof(struct ofcons_softc), ofcons_match, ofcons_attach 70 }; 71 72 extern struct cfdriver ofcons_cd; 73 74 static int ofcons_probe __P((void)); 75 76 static int 77 ofcons_match(parent, match, aux) 78 struct device *parent; 79 struct cfdata *match; 80 void *aux; 81 { 82 struct ofbus_attach_args *oba = aux; 83 84 if (strcmp(oba->oba_busname, "ofw")) 85 return (0); 86 if (!ofcons_probe()) 87 return 0; 88 return OF_instance_to_package(stdin) == oba->oba_phandle 89 || OF_instance_to_package(stdout) == oba->oba_phandle; 90 } 91 92 static void 93 ofcons_attach(parent, self, aux) 94 struct device *parent, *self; 95 void *aux; 96 { 97 struct ofcons_softc *sc = (struct ofcons_softc *) self; 98 99 printf("\n"); 100 101 callout_init(&sc->sc_poll_ch); 102 } 103 104 static void ofcons_start __P((struct tty *)); 105 static int ofcons_param __P((struct tty *, struct termios *)); 106 static void ofcons_pollin __P((void *)); 107 108 int 109 ofcons_open(dev, flag, mode, p) 110 dev_t dev; 111 int flag, mode; 112 struct proc *p; 113 { 114 struct ofcons_softc *sc; 115 int unit = minor(dev); 116 struct tty *tp; 117 118 if (unit >= ofcons_cd.cd_ndevs) 119 return ENXIO; 120 sc = ofcons_cd.cd_devs[unit]; 121 if (!sc) 122 return ENXIO; 123 if (!(tp = sc->of_tty)) 124 sc->of_tty = tp = ttymalloc(); 125 tp->t_oproc = ofcons_start; 126 tp->t_param = ofcons_param; 127 tp->t_dev = dev; 128 if (!(tp->t_state & TS_ISOPEN)) { 129 ttychars(tp); 130 tp->t_iflag = TTYDEF_IFLAG; 131 tp->t_oflag = TTYDEF_OFLAG; 132 tp->t_cflag = TTYDEF_CFLAG; 133 tp->t_lflag = TTYDEF_LFLAG; 134 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 135 ofcons_param(tp, &tp->t_termios); 136 ttsetwater(tp); 137 } else if ((tp->t_state&TS_XCLUDE) && suser(p->p_ucred, &p->p_acflag)) 138 return EBUSY; 139 tp->t_state |= TS_CARR_ON; 140 141 if (!(sc->of_flags & OFPOLL)) { 142 sc->of_flags |= OFPOLL; 143 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 144 } 145 146 return (*tp->t_linesw->l_open)(dev, tp); 147 } 148 149 int 150 ofcons_close(dev, flag, mode, p) 151 dev_t dev; 152 int flag, mode; 153 struct proc *p; 154 { 155 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 156 struct tty *tp = sc->of_tty; 157 158 callout_stop(&sc->sc_poll_ch); 159 sc->of_flags &= ~OFPOLL; 160 (*tp->t_linesw->l_close)(tp, flag); 161 ttyclose(tp); 162 return 0; 163 } 164 165 int 166 ofcons_read(dev, uio, flag) 167 dev_t dev; 168 struct uio *uio; 169 int flag; 170 { 171 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 172 struct tty *tp = sc->of_tty; 173 174 return (*tp->t_linesw->l_read)(tp, uio, flag); 175 } 176 177 int 178 ofcons_write(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_write)(tp, uio, flag); 187 } 188 189 int 190 ofcons_poll(dev, events, p) 191 dev_t dev; 192 int events; 193 struct proc *p; 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_poll)(tp, events, p)); 199 } 200 int 201 ofcons_ioctl(dev, cmd, data, flag, p) 202 dev_t dev; 203 u_long cmd; 204 caddr_t data; 205 int flag; 206 struct proc *p; 207 { 208 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 209 struct tty *tp = sc->of_tty; 210 int error; 211 212 if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p)) != EPASSTHROUGH) 213 return error; 214 return ttioctl(tp, cmd, data, flag, p); 215 } 216 217 struct tty * 218 ofcons_tty(dev) 219 dev_t dev; 220 { 221 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 222 223 return sc->of_tty; 224 } 225 226 void 227 ofcons_stop(tp, flag) 228 struct tty *tp; 229 int flag; 230 { 231 } 232 233 static void 234 ofcons_start(tp) 235 struct tty *tp; 236 { 237 struct clist *cl; 238 int s, len; 239 u_char buf[OFBURSTLEN]; 240 241 s = spltty(); 242 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 243 splx(s); 244 return; 245 } 246 tp->t_state |= TS_BUSY; 247 splx(s); 248 cl = &tp->t_outq; 249 len = q_to_b(cl, buf, OFBURSTLEN); 250 OF_write(stdout, buf, len); 251 s = spltty(); 252 tp->t_state &= ~TS_BUSY; 253 if (cl->c_cc) { 254 tp->t_state |= TS_TIMEOUT; 255 callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp); 256 } 257 if (cl->c_cc <= tp->t_lowat) { 258 if (tp->t_state & TS_ASLEEP) { 259 tp->t_state &= ~TS_ASLEEP; 260 wakeup(cl); 261 } 262 selwakeup(&tp->t_wsel); 263 } 264 splx(s); 265 } 266 267 static int 268 ofcons_param(tp, t) 269 struct tty *tp; 270 struct termios *t; 271 { 272 tp->t_ispeed = t->c_ispeed; 273 tp->t_ospeed = t->c_ospeed; 274 tp->t_cflag = t->c_cflag; 275 return 0; 276 } 277 278 static void 279 ofcons_pollin(aux) 280 void *aux; 281 { 282 struct ofcons_softc *sc = aux; 283 struct tty *tp = sc->of_tty; 284 char ch; 285 286 while (OF_read(stdin, &ch, 1) > 0) { 287 if (tp && (tp->t_state & TS_ISOPEN)) 288 (*tp->t_linesw->l_rint)(ch, tp); 289 } 290 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 291 } 292 293 static int 294 ofcons_probe() 295 { 296 int chosen; 297 char stdinbuf[4], stdoutbuf[4]; 298 299 if (stdin) 300 return 1; 301 if ((chosen = OF_finddevice("/chosen")) == -1) 302 return 0; 303 if (OF_getprop(chosen, "stdin", stdinbuf, sizeof stdinbuf) != 304 sizeof stdinbuf || 305 OF_getprop(chosen, "stdout", stdoutbuf, sizeof stdoutbuf) != 306 sizeof stdoutbuf) 307 return 0; 308 309 /* Decode properties. */ 310 stdin = of_decode_int(stdinbuf); 311 stdout = of_decode_int(stdoutbuf); 312 313 return 1; 314 } 315 316 void 317 ofcons_cnprobe(cd) 318 struct consdev *cd; 319 { 320 int maj; 321 322 if (!ofcons_probe()) 323 return; 324 325 for (maj = 0; maj < nchrdev; maj++) 326 if (cdevsw[maj].d_open == ofcons_open) 327 break; 328 cd->cn_dev = makedev(maj, 0); 329 cd->cn_pri = CN_INTERNAL; 330 } 331 332 void 333 ofcons_cninit(cd) 334 struct consdev *cd; 335 { 336 } 337 338 int 339 ofcons_cngetc(dev) 340 dev_t dev; 341 { 342 unsigned char ch = '\0'; 343 int l; 344 345 while ((l = OF_read(stdin, &ch, 1)) != 1) 346 if (l != -2 && l != 0) 347 return -1; 348 return ch; 349 } 350 351 void 352 ofcons_cnputc(dev, c) 353 dev_t dev; 354 int c; 355 { 356 char ch = c; 357 358 OF_write(stdout, &ch, 1); 359 } 360 361 void 362 ofcons_cnpollc(dev, on) 363 dev_t dev; 364 int on; 365 { 366 struct ofcons_softc *sc = ofcons_cd.cd_devs[minor(dev)]; 367 368 if (!sc) 369 return; 370 if (on) { 371 if (sc->of_flags & OFPOLL) 372 callout_stop(&sc->sc_poll_ch); 373 sc->of_flags &= ~OFPOLL; 374 } else { 375 if (!(sc->of_flags & OFPOLL)) { 376 sc->of_flags |= OFPOLL; 377 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 378 } 379 } 380 } 381