1 /* $NetBSD: ofcons.c,v 1.45 2014/07/25 08:10:37 dholland 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 1.45 2014/07/25 08:10:37 dholland 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 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(device_t, cfdata_t, void *); 65 static void ofcons_attach(device_t, device_t, void *); 66 67 CFATTACH_DECL_NEW(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 .d_open = ofcons_open, 82 .d_close = ofcons_close, 83 .d_read = ofcons_read, 84 .d_write = ofcons_write, 85 .d_ioctl = ofcons_ioctl, 86 .d_stop = nostop, 87 .d_tty = ofcons_tty, 88 .d_poll = ofcons_poll, 89 .d_mmap = nommap, 90 .d_kqfilter = ttykqfilter, 91 .d_discard = nodiscard, 92 .d_flag = D_TTY 93 }; 94 95 static int ofcons_probe(void); 96 97 static int 98 ofcons_match(device_t parent, cfdata_t match, void *aux) 99 { 100 struct ofbus_attach_args *oba = aux; 101 102 if (strcmp(oba->oba_busname, "ofw")) 103 return (0); 104 if (!ofcons_probe()) 105 return 0; 106 return OF_instance_to_package(stdin) == oba->oba_phandle 107 || OF_instance_to_package(stdout) == oba->oba_phandle; 108 } 109 110 static void 111 ofcons_attach(device_t parent, device_t self, void *aux) 112 { 113 struct ofcons_softc *sc = device_private(self); 114 115 printf("\n"); 116 117 callout_init(&sc->sc_poll_ch, 0); 118 } 119 120 static void ofcons_start(struct tty *); 121 static int ofcons_param(struct tty *, struct termios *); 122 static void ofcons_pollin(void *); 123 124 int 125 ofcons_open(dev_t dev, int flag, int mode, struct lwp *l) 126 { 127 struct ofcons_softc *sc; 128 struct tty *tp; 129 130 sc = device_lookup_private(&ofcons_cd, minor(dev)); 131 if (!sc) 132 return ENXIO; 133 if (!(tp = sc->of_tty)) 134 sc->of_tty = tp = tty_alloc(); 135 tp->t_oproc = ofcons_start; 136 tp->t_param = ofcons_param; 137 tp->t_dev = dev; 138 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 139 return (EBUSY); 140 if (!(tp->t_state & TS_ISOPEN)) { 141 ttychars(tp); 142 tp->t_iflag = TTYDEF_IFLAG; 143 tp->t_oflag = TTYDEF_OFLAG; 144 tp->t_cflag = TTYDEF_CFLAG; 145 tp->t_lflag = TTYDEF_LFLAG; 146 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 147 ofcons_param(tp, &tp->t_termios); 148 ttsetwater(tp); 149 } 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_t dev, int flag, int mode, struct lwp *l) 162 { 163 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 164 struct tty *tp = sc->of_tty; 165 166 callout_stop(&sc->sc_poll_ch); 167 sc->of_flags &= ~OFPOLL; 168 (*tp->t_linesw->l_close)(tp, flag); 169 ttyclose(tp); 170 return 0; 171 } 172 173 int 174 ofcons_read(dev_t dev, struct uio *uio, int flag) 175 { 176 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 177 struct tty *tp = sc->of_tty; 178 179 return (*tp->t_linesw->l_read)(tp, uio, flag); 180 } 181 182 int 183 ofcons_write(dev_t dev, struct uio *uio, int flag) 184 { 185 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 186 struct tty *tp = sc->of_tty; 187 188 return (*tp->t_linesw->l_write)(tp, uio, flag); 189 } 190 191 int 192 ofcons_poll(dev_t dev, int events, struct lwp *l) 193 { 194 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 195 struct tty *tp = sc->of_tty; 196 197 return ((*tp->t_linesw->l_poll)(tp, events, l)); 198 } 199 int 200 ofcons_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 201 { 202 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 203 struct tty *tp = sc->of_tty; 204 int error; 205 206 if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l)) != EPASSTHROUGH) 207 return error; 208 return ttioctl(tp, cmd, data, flag, l); 209 } 210 211 struct tty * 212 ofcons_tty(dev_t dev) 213 { 214 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 215 216 return sc->of_tty; 217 } 218 219 static void 220 ofcons_start(struct tty *tp) 221 { 222 int s, len; 223 u_char buf[OFBURSTLEN]; 224 225 s = spltty(); 226 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 227 splx(s); 228 return; 229 } 230 tp->t_state |= TS_BUSY; 231 splx(s); 232 len = q_to_b(&tp->t_outq, buf, OFBURSTLEN); 233 OF_write(stdout, buf, len); 234 s = spltty(); 235 tp->t_state &= ~TS_BUSY; 236 if (ttypull(tp)) { 237 tp->t_state |= TS_TIMEOUT; 238 callout_schedule(&tp->t_rstrt_ch, 1); 239 } 240 splx(s); 241 } 242 243 static int 244 ofcons_param(struct tty *tp, struct termios *t) 245 { 246 tp->t_ispeed = t->c_ispeed; 247 tp->t_ospeed = t->c_ospeed; 248 tp->t_cflag = t->c_cflag; 249 return 0; 250 } 251 252 static void 253 ofcons_pollin(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(void) 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(struct consdev *cd) 291 { 292 int maj; 293 294 if (!ofcons_probe()) 295 return; 296 297 maj = cdevsw_lookup_major(&ofcons_cdevsw); 298 cd->cn_dev = makedev(maj, 0); 299 cd->cn_pri = CN_INTERNAL; 300 } 301 302 void 303 ofcons_cninit(struct consdev *cd) 304 { 305 } 306 307 int 308 ofcons_cngetc(dev_t dev) 309 { 310 unsigned char ch = '\0'; 311 int l; 312 313 while ((l = OF_read(stdin, &ch, 1)) != 1) 314 if (l != -2 && l != 0) 315 return -1; 316 return ch; 317 } 318 319 void 320 ofcons_cnputc(dev_t dev, int c) 321 { 322 char ch = c; 323 324 OF_write(stdout, &ch, 1); 325 } 326 327 void 328 ofcons_cnpollc(dev_t dev, int on) 329 { 330 struct ofcons_softc *sc = device_lookup_private(&ofcons_cd, minor(dev)); 331 332 if (!sc) 333 return; 334 if (on) { 335 if (sc->of_flags & OFPOLL) 336 callout_stop(&sc->sc_poll_ch); 337 sc->of_flags &= ~OFPOLL; 338 } else { 339 if (!(sc->of_flags & OFPOLL)) { 340 sc->of_flags |= OFPOLL; 341 callout_reset(&sc->sc_poll_ch, 1, ofcons_pollin, sc); 342 } 343 } 344 } 345
Indexes created Sat Sep 20 22:09:52 GMT 2025