ofcons.c revision 1.35
1 /* $NetBSD: ofcons.c,v 1.35 2009/01/03 03:43:22 yamt 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 1.35 2009/01/03 03:43:22 yamt 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 #include <sys/kauth.h> 45 46 #include <dev/cons.h> 47 48 #include <dev/ofw/openfirm.h> 49 50 struct ofcons_softc { 51 struct device of_dev; 52 struct tty *of_tty; 53 struct callout sc_poll_ch; 54 int of_flags; 55 }; 56 /* flags: */ 57 #define OFPOLL 1 58 59 #define OFBURSTLEN 128 /* max number of bytes to write in one chunk */ 60 61 cons_decl(ofcons_); 62 63 static int stdin, stdout; 64 65 static int ofcons_match(struct device *, struct cfdata *, void *); 66 static void ofcons_attach(struct device *, struct device *, void *); 67 68 CFATTACH_DECL(ofcons, sizeof(struct ofcons_softc), 69 ofcons_match, ofcons_attach, NULL, NULL); 70 71 extern struct cfdriver ofcons_cd; 72 73 dev_type_open(ofcons_open); 74 dev_type_close(ofcons_close); 75 dev_type_read(ofcons_read); 76 dev_type_write(ofcons_write); 77 dev_type_ioctl(ofcons_ioctl); 78 dev_type_tty(ofcons_tty); 79 dev_type_poll(ofcons_poll); 80 81 const struct cdevsw ofcons_cdevsw = { 82 ofcons_open, ofcons_close, ofcons_read, ofcons_write, ofcons_ioctl, 83 nostop, ofcons_tty, ofcons_poll, nommap, ttykqfilter, D_TTY 84 }; 85 86 static int ofcons_probe(void); 87 88 static int 89 ofcons_match(parent, match, aux) 90 struct device *parent; 91 struct cfdata *match; 92 void *aux; 93 { 94 struct ofbus_attach_args *oba = aux; 95 96 if (strcmp(oba->oba_busname, "ofw")) 97 return (0); 98 if (!ofcons_probe()) 99 return 0; 100 return OF_instance_to_package(stdin) == oba->oba_phandle 101 || OF_instance_to_package(stdout) == oba->oba_phandle; 102 } 103 104 static void 105 ofcons_attach(parent, self, aux) 106 struct device *parent, *self; 107 void *aux; 108 { 109 struct ofcons_softc *sc = device_private(self); 110 111 printf("\n"); 112 113 callout_init(&sc->sc_poll_ch, 0); 114 } 115 116 static void ofcons_start(struct tty *); 117 static int ofcons_param(struct tty *, struct termios *); 118 static void ofcons_pollin(void *); 119 120 int 121 ofcons_open(dev_t dev, int flag, int mode, struct lwp *l) 122 { 123 struct ofcons_softc *sc; 124 struct tty *tp; 125 126 sc = device_lookup_private(&ofcons_cd, minor(dev)); 127 if (!sc) 128 return ENXIO; 129 if (!(tp = sc->of_tty)) 130 sc->of_tty = tp = ttymalloc(); 131 tp->t_oproc = ofcons_start; 132 tp->t_param = ofcons_param; 133 tp->t_dev = dev; 134 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 135 return (EBUSY); 136 if (!(tp->t_state & TS_ISOPEN)) { 137 ttychars(tp); 138 tp->t_iflag = TTYDEF_IFLAG; 139 tp->t_oflag = TTYDEF_OFLAG; 140 tp->t_cflag = TTYDEF_CFLAG; 141 tp->t_lflag = TTYDEF_LFLAG; 142 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 143 ofcons_param(tp, &tp->t_termios); 144 ttsetwater(tp); 145 } 146 tp->t_state |= TS_CARR_ON; 147 148 if (!(sc->of_flags & OFPOLL)) { 149 sc->of_flags |= OFPOLL; 150 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 151 } 152 153 return (*tp->t_linesw->l_open)(dev, tp); 154 } 155 156 int 157 ofcons_close(dev_t dev, int flag, int mode, struct lwp *l) 158 { 159 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 160 struct tty *tp = sc->of_tty; 161 162 callout_stop(&sc->sc_poll_ch); 163 sc->of_flags &= ~OFPOLL; 164 (*tp->t_linesw->l_close)(tp, flag); 165 ttyclose(tp); 166 return 0; 167 } 168 169 int 170 ofcons_read(dev_t dev, struct uio *uio, int flag) 171 { 172 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 173 struct tty *tp = sc->of_tty; 174 175 return (*tp->t_linesw->l_read)(tp, uio, flag); 176 } 177 178 int 179 ofcons_write(dev_t dev, struct uio *uio, int flag) 180 { 181 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 182 struct tty *tp = sc->of_tty; 183 184 return (*tp->t_linesw->l_write)(tp, uio, flag); 185 } 186 187 int 188 ofcons_poll(dev_t dev, int events, struct lwp *l) 189 { 190 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 191 struct tty *tp = sc->of_tty; 192 193 return ((*tp->t_linesw->l_poll)(tp, events, l)); 194 } 195 int 196 ofcons_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 197 { 198 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 199 struct tty *tp = sc->of_tty; 200 int error; 201 202 if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l)) != EPASSTHROUGH) 203 return error; 204 return ttioctl(tp, cmd, data, flag, l); 205 } 206 207 struct tty * 208 ofcons_tty(dev_t dev) 209 { 210 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 211 212 return sc->of_tty; 213 } 214 215 static void 216 ofcons_start(tp) 217 struct tty *tp; 218 { 219 int s, len; 220 u_char buf[OFBURSTLEN]; 221 222 s = spltty(); 223 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 224 splx(s); 225 return; 226 } 227 tp->t_state |= TS_BUSY; 228 splx(s); 229 len = q_to_b(cl, buf, OFBURSTLEN); 230 OF_write(stdout, buf, len); 231 s = spltty(); 232 tp->t_state &= ~TS_BUSY; 233 if (ttypull(tp)) { 234 tp->t_state |= TS_TIMEOUT; 235 callout_schedule(&tp->t_rstrt_ch, 1); 236 } 237 splx(s); 238 } 239 240 static int 241 ofcons_param(tp, t) 242 struct tty *tp; 243 struct termios *t; 244 { 245 tp->t_ispeed = t->c_ispeed; 246 tp->t_ospeed = t->c_ospeed; 247 tp->t_cflag = t->c_cflag; 248 return 0; 249 } 250 251 static void 252 ofcons_pollin(aux) 253 void *aux; 254 { 255 struct ofcons_softc *sc = aux; 256 struct tty *tp = sc->of_tty; 257 char ch; 258 259 while (OF_read(stdin, &ch, 1) > 0) { 260 if (tp && (tp->t_state & TS_ISOPEN)) 261 (*tp->t_linesw->l_rint)(ch, tp); 262 } 263 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 264 } 265 266 static int 267 ofcons_probe() 268 { 269 int chosen; 270 char stdinbuf[4], stdoutbuf[4]; 271 272 if (stdin) 273 return 1; 274 if ((chosen = OF_finddevice("/chosen")) == -1) 275 return 0; 276 if (OF_getprop(chosen, "stdin", stdinbuf, sizeof stdinbuf) != 277 sizeof stdinbuf || 278 OF_getprop(chosen, "stdout", stdoutbuf, sizeof stdoutbuf) != 279 sizeof stdoutbuf) 280 return 0; 281 282 /* Decode properties. */ 283 stdin = of_decode_int(stdinbuf); 284 stdout = of_decode_int(stdoutbuf); 285 286 return 1; 287 } 288 289 void 290 ofcons_cnprobe(cd) 291 struct consdev *cd; 292 { 293 int maj; 294 295 if (!ofcons_probe()) 296 return; 297 298 maj = cdevsw_lookup_major(&ofcons_cdevsw); 299 cd->cn_dev = makedev(maj, 0); 300 cd->cn_pri = CN_INTERNAL; 301 } 302 303 void 304 ofcons_cninit(cd) 305 struct consdev *cd; 306 { 307 } 308 309 int 310 ofcons_cngetc(dev) 311 dev_t dev; 312 { 313 unsigned char ch = '\0'; 314 int l; 315 316 while ((l = OF_read(stdin, &ch, 1)) != 1) 317 if (l != -2 && l != 0) 318 return -1; 319 return ch; 320 } 321 322 void 323 ofcons_cnputc(dev, c) 324 dev_t dev; 325 int c; 326 { 327 char ch = c; 328 329 OF_write(stdout, &ch, 1); 330 } 331 332 void 333 ofcons_cnpollc(dev_t dev, int on) 334 { 335 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 336 337 if (!sc) 338 return; 339 if (on) { 340 if (sc->of_flags & OFPOLL) 341 callout_stop(&sc->sc_poll_ch); 342 sc->of_flags &= ~OFPOLL; 343 } else { 344 if (!(sc->of_flags & OFPOLL)) { 345 sc->of_flags |= OFPOLL; 346 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 347 } 348 } 349 } 350
Indexes created Fri Sep 26 08:10:20 GMT 2025