pcons.c revision 1.2
1 /* $NetBSD: pcons.c,v 1.2 2000/06/24 16:51:36 eeh Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Eduardo E. Horvath 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * Default console driver. Uses the PROM or whatever 33 * driver(s) are appropriate. 34 */ 35 36 #include "opt_ddb.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/conf.h> 41 #include <sys/device.h> 42 #include <sys/file.h> 43 #include <sys/ioctl.h> 44 #include <sys/kernel.h> 45 #include <sys/proc.h> 46 #include <sys/tty.h> 47 #include <sys/time.h> 48 #include <sys/syslog.h> 49 50 #include <machine/autoconf.h> 51 #include <machine/openfirm.h> 52 #include <machine/bsd_openprom.h> 53 #include <machine/conf.h> 54 #include <machine/cpu.h> 55 #include <machine/eeprom.h> 56 #include <machine/psl.h> 57 #include <machine/z8530var.h> 58 59 #include <dev/cons.h> 60 61 #include <sparc64/dev/cons.h> 62 63 static int pconsmatch __P((struct device *, struct cfdata *, void *)); 64 static void pconsattach __P((struct device *, struct device *, void *)); 65 66 struct cfattach pcons_ca = { 67 sizeof(struct pconssoftc), pconsmatch, pconsattach 68 }; 69 70 extern struct cfdriver pcons_cd; 71 72 static int pconsprobe __P((void)); 73 74 static int 75 pconsmatch(parent, match, aux) 76 struct device *parent; 77 struct cfdata *match; 78 void *aux; 79 { 80 struct mainbus_attach_args *ma = aux; 81 extern struct consdev *cn_tab; 82 extern int prom_cngetc __P((dev_t)); 83 84 /* Only attach if no other console has attached. */ 85 return ((strcmp("pcons", ma->ma_name) == 0) && 86 (cn_tab->cn_getc == prom_cngetc)); 87 88 } 89 90 static void 91 pconsattach(parent, self, aux) 92 struct device *parent, *self; 93 void *aux; 94 { 95 struct pconssoftc *sc = (struct pconssoftc *) self; 96 97 printf("\n"); 98 if (!pconsprobe()) 99 return; 100 101 callout_init(&sc->sc_poll_ch); 102 } 103 104 static void pconsstart __P((struct tty *)); 105 static int pconsparam __P((struct tty *, struct termios *)); 106 static void pcons_poll __P((void *)); 107 108 int 109 pconsopen(dev, flag, mode, p) 110 dev_t dev; 111 int flag, mode; 112 struct proc *p; 113 { 114 struct pconssoftc *sc; 115 int unit = minor(dev); 116 struct tty *tp; 117 118 if (unit >= pcons_cd.cd_ndevs) 119 return ENXIO; 120 sc = pcons_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 = pconsstart; 126 tp->t_param = pconsparam; 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 pconsparam(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, pcons_poll, sc); 144 } 145 146 return (*linesw[tp->t_line].l_open)(dev, tp); 147 } 148 149 int 150 pconsclose(dev, flag, mode, p) 151 dev_t dev; 152 int flag, mode; 153 struct proc *p; 154 { 155 struct pconssoftc *sc = pcons_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 (*linesw[tp->t_line].l_close)(tp, flag); 161 ttyclose(tp); 162 return 0; 163 } 164 165 int 166 pconsread(dev, uio, flag) 167 dev_t dev; 168 struct uio *uio; 169 int flag; 170 { 171 struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)]; 172 struct tty *tp = sc->of_tty; 173 174 return (*linesw[tp->t_line].l_read)(tp, uio, flag); 175 } 176 177 int 178 pconswrite(dev, uio, flag) 179 dev_t dev; 180 struct uio *uio; 181 int flag; 182 { 183 struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)]; 184 struct tty *tp = sc->of_tty; 185 186 return (*linesw[tp->t_line].l_write)(tp, uio, flag); 187 } 188 189 int 190 pconsioctl(dev, cmd, data, flag, p) 191 dev_t dev; 192 u_long cmd; 193 caddr_t data; 194 int flag; 195 struct proc *p; 196 { 197 struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)]; 198 struct tty *tp = sc->of_tty; 199 int error; 200 201 if ((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p)) >= 0) 202 return error; 203 if ((error = ttioctl(tp, cmd, data, flag, p)) >= 0) 204 return error; 205 return ENOTTY; 206 } 207 208 struct tty * 209 pconstty(dev) 210 dev_t dev; 211 { 212 struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)]; 213 214 return sc->of_tty; 215 } 216 217 void 218 pconsstop(tp, flag) 219 struct tty *tp; 220 int flag; 221 { 222 } 223 224 static void 225 pconsstart(tp) 226 struct tty *tp; 227 { 228 struct clist *cl; 229 int s, len; 230 u_char buf[OFBURSTLEN]; 231 232 s = spltty(); 233 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) { 234 splx(s); 235 return; 236 } 237 tp->t_state |= TS_BUSY; 238 splx(s); 239 cl = &tp->t_outq; 240 len = q_to_b(cl, buf, OFBURSTLEN); 241 OF_write(stdout, buf, len); 242 s = spltty(); 243 tp->t_state &= ~TS_BUSY; 244 if (cl->c_cc) { 245 tp->t_state |= TS_TIMEOUT; 246 callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp); 247 } 248 if (cl->c_cc <= tp->t_lowat) { 249 if (tp->t_state & TS_ASLEEP) { 250 tp->t_state &= ~TS_ASLEEP; 251 wakeup(cl); 252 } 253 selwakeup(&tp->t_wsel); 254 } 255 splx(s); 256 } 257 258 static int 259 pconsparam(tp, t) 260 struct tty *tp; 261 struct termios *t; 262 { 263 tp->t_ispeed = t->c_ispeed; 264 tp->t_ospeed = t->c_ospeed; 265 tp->t_cflag = t->c_cflag; 266 return 0; 267 } 268 269 static void 270 pcons_poll(aux) 271 void *aux; 272 { 273 struct pconssoftc *sc = aux; 274 struct tty *tp = sc->of_tty; 275 char ch; 276 static int nas = 0; 277 278 279 while (OF_read(stdin, &ch, 1) > 0) { 280 if (ch == 'a') { 281 if (nas++ > 3) Debugger(); 282 } else nas = 0; 283 if (tp && (tp->t_state & TS_ISOPEN)) 284 (*linesw[tp->t_line].l_rint)(ch, tp); 285 } 286 callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc); 287 } 288 289 int 290 pconsprobe() 291 { 292 if (!stdin) stdin = OF_stdin(); 293 if (!stdout) stdout = OF_stdout(); 294 295 return (stdin && stdout); 296 } 297 298 void 299 pcons_cnpollc(dev, on) 300 dev_t dev; 301 int on; 302 { 303 struct pconssoftc *sc = NULL; 304 305 if (pcons_cd.cd_devs) 306 sc = pcons_cd.cd_devs[minor(dev)]; 307 308 if (on) { 309 if (!sc) return; 310 if (sc->of_flags & OFPOLL) 311 callout_stop(&sc->sc_poll_ch); 312 sc->of_flags &= ~OFPOLL; 313 } else { 314 /* Resuming kernel. */ 315 if (sc && !(sc->of_flags & OFPOLL)) { 316 sc->of_flags |= OFPOLL; 317 callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc); 318 } 319 } 320 } 321
Indexes created Tue Sep 23 23:09:58 GMT 2025