1 /* $NetBSD: romcons.c,v 1.3 2014/07/25 08:10:34 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 * romcons.c - from sys/dev/ofw/ofcons.c 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: romcons.c,v 1.3 2014/07/25 08:10:34 dholland Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/conf.h> 42 #include <sys/device.h> 43 #include <sys/proc.h> 44 #include <sys/systm.h> 45 #include <sys/callout.h> 46 #include <sys/tty.h> 47 #include <sys/kauth.h> 48 49 #include <dev/cons.h> 50 51 #include <machine/autoconf.h> 52 #include <machine/romcall.h> 53 54 #include "ioconf.h" 55 56 struct romcons_softc { 57 device_t sc_dev; 58 struct tty *sc_tty; 59 struct callout sc_poll_ch; 60 int sc_flags; 61 #define CONS_POLL 1 62 }; 63 64 #define BURSTLEN 128 /* max number of bytes to write in one chunk */ 65 66 cons_decl(romcons_); 67 68 static int romcons_match(device_t, cfdata_t, void *); 69 static void romcons_attach(device_t, device_t, void *); 70 71 CFATTACH_DECL_NEW(romcons, sizeof(struct romcons_softc), 72 romcons_match, romcons_attach, NULL, NULL); 73 74 dev_type_open(romcons_open); 75 dev_type_close(romcons_close); 76 dev_type_read(romcons_read); 77 dev_type_write(romcons_write); 78 dev_type_ioctl(romcons_ioctl); 79 dev_type_tty(romcons_tty); 80 dev_type_poll(romcons_poll); 81 82 void romcons_kbdinput(int); 83 84 const struct cdevsw romcons_cdevsw = { 85 .d_open = romcons_open, 86 .d_close = romcons_close, 87 .d_read = romcons_read, 88 .d_write = romcons_write, 89 .d_ioctl = romcons_ioctl, 90 .d_stop = nostop, 91 .d_tty = romcons_tty, 92 .d_poll = romcons_poll, 93 .d_mmap = nommap, 94 .d_kqfilter = ttykqfilter, 95 .d_discard = nodiscard, 96 .d_flag = D_TTY 97 }; 98 99 struct consdev consdev_rom = cons_init(romcons_); 100 101 bool romcons_is_console; 102 103 static int 104 romcons_match(device_t parent, cfdata_t match, void *aux) 105 { 106 struct mainbus_attach_args *ma = aux; 107 static bool romcons_matched; 108 109 if (strcmp(ma->ma_name, "romcons")) 110 return 0; 111 112 if (!romcons_is_console) 113 return 0; 114 115 if (romcons_matched) 116 return 0; 117 118 romcons_matched = true; 119 return 1; 120 } 121 122 static void 123 romcons_attach(device_t parent, device_t self, void *aux) 124 { 125 struct romcons_softc *sc = device_private(self); 126 127 sc->sc_dev = self; 128 vectab[46] = romcallvec; /* XXX */ 129 aprint_normal("\n"); 130 131 callout_init(&sc->sc_poll_ch, 0); 132 } 133 134 static void romcons_start(struct tty *); 135 static int romcons_param(struct tty *, struct termios *); 136 static void romcons_pollin(void *); 137 138 int 139 romcons_open(dev_t dev, int flag, int mode, struct lwp *l) 140 { 141 struct romcons_softc *sc; 142 struct tty *tp; 143 144 sc = device_lookup_private(&romcons_cd, minor(dev)); 145 if (sc == NULL) 146 return ENXIO; 147 if ((tp = sc->sc_tty) == 0) 148 sc->sc_tty = tp = tty_alloc(); 149 tp->t_oproc = romcons_start; 150 tp->t_param = romcons_param; 151 tp->t_dev = dev; 152 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp)) 153 return EBUSY; 154 if ((tp->t_state & TS_ISOPEN) == 0) { 155 ttychars(tp); 156 tp->t_iflag = TTYDEF_IFLAG; 157 tp->t_oflag = TTYDEF_OFLAG; 158 tp->t_cflag = TTYDEF_CFLAG; 159 tp->t_lflag = TTYDEF_LFLAG; 160 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 161 romcons_param(tp, &tp->t_termios); 162 ttsetwater(tp); 163 } 164 tp->t_state |= TS_CARR_ON; 165 166 if ((sc->sc_flags & CONS_POLL) == 0) { 167 sc->sc_flags |= CONS_POLL; 168 callout_reset(&sc->sc_poll_ch, 1, romcons_pollin, sc); 169 } 170 171 return (*tp->t_linesw->l_open)(dev, tp); 172 } 173 174 int 175 romcons_close(dev_t dev, int flag, int mode, struct lwp *l) 176 { 177 struct romcons_softc *sc; 178 struct tty *tp; 179 180 sc = device_lookup_private(&romcons_cd, minor(dev)); 181 tp = sc->sc_tty; 182 callout_stop(&sc->sc_poll_ch); 183 sc->sc_flags &= ~CONS_POLL; 184 (*tp->t_linesw->l_close)(tp, flag); 185 ttyclose(tp); 186 return 0; 187 } 188 189 int 190 romcons_read(dev_t dev, struct uio *uio, int flag) 191 { 192 struct romcons_softc *sc; 193 struct tty *tp; 194 195 sc = device_lookup_private(&romcons_cd, minor(dev)); 196 tp = sc->sc_tty; 197 198 return (*tp->t_linesw->l_read)(tp, uio, flag); 199 } 200 201 int 202 romcons_write(dev_t dev, struct uio *uio, int flag) 203 { 204 struct romcons_softc *sc; 205 struct tty *tp; 206 207 sc = device_lookup_private(&romcons_cd, minor(dev)); 208 tp = sc->sc_tty; 209 return (*tp->t_linesw->l_write)(tp, uio, flag); 210 } 211 212 int 213 romcons_poll(dev_t dev, int events, struct lwp *l) 214 { 215 struct romcons_softc *sc; 216 struct tty *tp; 217 218 sc = device_lookup_private(&romcons_cd, minor(dev)); 219 tp = sc->sc_tty; 220 return (*tp->t_linesw->l_poll)(tp, events, l); 221 } 222 int 223 romcons_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 224 { 225 struct romcons_softc *sc; 226 struct tty *tp; 227 int error; 228 229 sc = device_lookup_private(&romcons_cd, minor(dev)); 230 tp = sc->sc_tty; 231 if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l)) != 232 EPASSTHROUGH) 233 return error; 234 return ttioctl(tp, cmd, data, flag, l); 235 } 236 237 struct tty * 238 romcons_tty(dev_t dev) 239 { 240 struct romcons_softc *sc; 241 242 sc = device_lookup_private(&romcons_cd, minor(dev)); 243 return sc->sc_tty; 244 } 245 246 static void 247 romcons_start(struct tty *tp) 248 { 249 int s, len; 250 uint8_t buf[BURSTLEN]; 251 252 s = spltty(); 253 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 254 splx(s); 255 return; 256 } 257 tp->t_state |= TS_BUSY; 258 splx(s); 259 len = q_to_b(&tp->t_outq, buf, BURSTLEN); 260 s = splhigh(); 261 rom_write(1, buf, len); 262 splx(s); 263 s = spltty(); 264 tp->t_state &= ~TS_BUSY; 265 if (ttypull(tp)) { 266 tp->t_state |= TS_TIMEOUT; 267 callout_schedule(&tp->t_rstrt_ch, 1); 268 } 269 splx(s); 270 } 271 272 static int 273 romcons_param(struct tty *tp, struct termios *t) 274 { 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 romcons_pollin(void *aux) 284 { 285 struct romcons_softc *sc = aux; 286 struct tty *tp = sc->sc_tty; 287 char ch; 288 int rv; 289 290 while (0 && (rv = rom_read(1, &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, romcons_pollin, sc); 295 } 296 297 void 298 romcons_kbdinput(int ks) 299 { 300 struct romcons_softc *sc; 301 struct tty *tp; 302 303 sc = device_lookup_private(&romcons_cd, 0); 304 tp = sc->sc_tty; 305 if (tp && (tp->t_state & TS_ISOPEN)) 306 (*tp->t_linesw->l_rint)(ks, tp); 307 } 308 309 void 310 romcons_cnprobe(struct consdev *cd) 311 { 312 } 313 314 void 315 romcons_cninit(struct consdev *cd) 316 { 317 int maj; 318 319 maj = cdevsw_lookup_major(&romcons_cdevsw); 320 cd->cn_dev = makedev(maj, 0); 321 romcons_is_console = true; 322 vectab[46] = romcallvec; /* XXX */ 323 } 324 325 int 326 romcons_cngetc(dev_t dev) 327 { 328 unsigned char ch = '\0'; 329 int l; 330 331 while ((l = rom_read(1, &ch, 1)) != 1) 332 if (l != -2 && l != 0) 333 return -1; 334 return ch; 335 } 336 337 void 338 romcons_cnputc(dev_t dev, int c) 339 { 340 char ch = c; 341 342 rom_write(1, &ch, 1); 343 } 344 345 void 346 romcons_cnpollc(dev_t dev, int on) 347 { 348 struct romcons_softc *sc; 349 350 sc = device_lookup_private(&romcons_cd, minor(dev)); 351 352 if (sc == NULL) 353 return; 354 if (on) { 355 if (sc->sc_flags & CONS_POLL) 356 callout_stop(&sc->sc_poll_ch); 357 sc->sc_flags &= ~CONS_POLL; 358 } else { 359 if ((sc->sc_flags & CONS_POLL) == 0) { 360 sc->sc_flags |= CONS_POLL; 361 callout_reset(&sc->sc_poll_ch, 1, romcons_pollin, sc); 362 } 363 } 364 } 365
Indexes created Sat Sep 20 22:09:52 GMT 2025