1 /* 2 * Copyright (C) 2001 Benno Rice. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef lint 27 static const char rcsid[] = 28 "$FreeBSD$"; 29 #endif /* not lint */ 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/conf.h> 36 #include <sys/cons.h> 37 #include <sys/consio.h> 38 #include <sys/tty.h> 39 40 #include <dev/ofw/openfirm.h> 41 42 #define OFW_POLL_HZ 4 43 44 static d_open_t ofw_dev_open; 45 static d_close_t ofw_dev_close; 46 static d_ioctl_t ofw_dev_ioctl; 47 48 #define CDEV_MAJOR 97 49 50 static struct cdevsw ofw_cdevsw = { 51 /* open */ ofw_dev_open, 52 /* close */ ofw_dev_close, 53 /* read */ ttyread, 54 /* write */ ttywrite, 55 /* ioctl */ ofw_dev_ioctl, 56 /* poll */ ttypoll, 57 /* mmap */ nommap, 58 /* strategy */ nostrategy, 59 /* name */ "ofw", 60 /* major */ CDEV_MAJOR, 61 /* dump */ nodump, 62 /* psize */ nopsize, 63 /* flags */ 0, 64 }; 65 66 static struct tty *ofw_tp = NULL; 67 static int polltime; 68 static struct callout_handle ofw_timeouthandle 69 = CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle); 70 71 static void ofw_tty_start(struct tty *); 72 static int ofw_tty_param(struct tty *, struct termios *); 73 static void ofw_tty_stop(struct tty *, int); 74 static void ofw_timeout(void *); 75 76 static cn_probe_t ofw_cons_probe; 77 static cn_init_t ofw_cons_init; 78 static cn_getc_t ofw_cons_getc; 79 static cn_checkc_t ofw_cons_checkc; 80 static cn_putc_t ofw_cons_putc; 81 82 CONS_DRIVER(ofw, ofw_cons_probe, ofw_cons_init, NULL, ofw_cons_getc, 83 ofw_cons_checkc, ofw_cons_putc, NULL); 84 85 static void 86 cn_drvinit(void *unused) 87 { 88 phandle_t options; 89 char output[32]; 90 91 if (ofw_consdev.cn_dev != NULL) { 92 if ((options = OF_finddevice("/options")) == -1 || 93 OF_getprop(options, "output-device", output, 94 sizeof(output)) == -1) 95 return; 96 make_dev(&ofw_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "%s", 97 output); 98 make_dev_alias(ofw_consdev.cn_dev, "ofwcons"); 99 } 100 } 101 102 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE + CDEV_MAJOR, cn_drvinit, NULL) 103 104 static int stdin; 105 static int stdout; 106 107 static int 108 ofw_dev_open(dev_t dev, int flag, int mode, struct thread *td) 109 { 110 struct tty *tp; 111 int unit; 112 int error, setuptimeout; 113 114 error = 0; 115 setuptimeout = 0; 116 unit = minor(dev); 117 118 tp = ofw_tp = dev->si_tty = ttymalloc(ofw_tp); 119 120 tp->t_oproc = ofw_tty_start; 121 tp->t_param = ofw_tty_param; 122 tp->t_stop = ofw_tty_stop; 123 tp->t_dev = dev; 124 125 if ((tp->t_state & TS_ISOPEN) == 0) { 126 tp->t_state |= TS_CARR_ON; 127 ttychars(tp); 128 tp->t_iflag = TTYDEF_IFLAG; 129 tp->t_oflag = TTYDEF_OFLAG; 130 tp->t_cflag = TTYDEF_CFLAG|CLOCAL; 131 tp->t_lflag = TTYDEF_LFLAG; 132 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 133 ttsetwater(tp); 134 135 setuptimeout = 1; 136 } else if ((tp->t_state & TS_XCLUDE) && suser(td)) { 137 return (EBUSY); 138 } 139 140 error = (*linesw[tp->t_line].l_open)(dev, tp); 141 142 if (error == 0 && setuptimeout) { 143 polltime = hz / OFW_POLL_HZ; 144 if (polltime < 1) { 145 polltime = 1; 146 } 147 148 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime); 149 } 150 151 return (error); 152 } 153 154 static int 155 ofw_dev_close(dev_t dev, int flag, int mode, struct thread *td) 156 { 157 int unit; 158 struct tty *tp; 159 160 unit = minor(dev); 161 tp = ofw_tp; 162 163 if (unit != 0) { 164 return (ENXIO); 165 } 166 167 (*linesw[tp->t_line].l_close)(tp, flag); 168 ttyclose(tp); 169 170 return (0); 171 } 172 173 static int 174 ofw_dev_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 175 { 176 int unit; 177 struct tty *tp; 178 int error; 179 180 unit = minor(dev); 181 tp = ofw_tp; 182 183 if (unit != 0) { 184 return (ENXIO); 185 } 186 187 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); 188 if (error != ENOIOCTL) { 189 return (error); 190 } 191 192 error = ttioctl(tp, cmd, data, flag); 193 if (error != ENOIOCTL) { 194 return (error); 195 } 196 197 return (ENOTTY); 198 } 199 200 static int 201 ofw_tty_param(struct tty *tp, struct termios *t) 202 { 203 204 return (0); 205 } 206 207 static void 208 ofw_tty_start(struct tty *tp) 209 { 210 211 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 212 ttwwakeup(tp); 213 return; 214 } 215 216 tp->t_state |= TS_BUSY; 217 while (tp->t_outq.c_cc != 0) { 218 ofw_cons_putc(tp->t_dev, getc(&tp->t_outq)); 219 } 220 tp->t_state &= ~TS_BUSY; 221 222 ttwwakeup(tp); 223 } 224 225 static void 226 ofw_tty_stop(struct tty *tp, int flag) 227 { 228 229 if (tp->t_state & TS_BUSY) { 230 if ((tp->t_state & TS_TTSTOP) == 0) { 231 tp->t_state |= TS_FLUSH; 232 } 233 } 234 } 235 236 static void 237 ofw_timeout(void *v) 238 { 239 struct tty *tp; 240 int c; 241 242 tp = (struct tty *)v; 243 244 while ((c = ofw_cons_checkc(tp->t_dev)) != -1) { 245 if (tp->t_state & TS_ISOPEN) { 246 (*linesw[tp->t_line].l_rint)(c, tp); 247 } 248 } 249 250 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime); 251 } 252 253 static void 254 ofw_cons_probe(struct consdev *cp) 255 { 256 int chosen; 257 258 if ((chosen = OF_finddevice("/chosen")) == -1) { 259 cp->cn_pri = CN_DEAD; 260 return; 261 } 262 263 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) { 264 cp->cn_pri = CN_DEAD; 265 return; 266 } 267 268 if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) { 269 cp->cn_pri = CN_DEAD; 270 return; 271 } 272 273 cp->cn_dev = NULL; 274 cp->cn_pri = CN_INTERNAL; 275 } 276 277 static void 278 ofw_cons_init(struct consdev *cp) 279 { 280 281 cp->cn_dev = makedev(CDEV_MAJOR, 0); 282 cp->cn_tp = ofw_tp; 283 } 284 285 static int 286 ofw_cons_getc(dev_t dev) 287 { 288 unsigned char ch; 289 int l; 290 291 ch = '\0'; 292 293 while ((l = OF_read(stdin, &ch, 1)) != 1) { 294 if (l != -2 && l != 0) { 295 return (-1); 296 } 297 } 298 299 return (ch); 300 } 301 302 static int 303 ofw_cons_checkc(dev_t dev) 304 { 305 unsigned char ch; 306 307 if (OF_read(stdin, &ch, 1) > 0) { 308 return (ch); 309 } 310 311 return (-1); 312 } 313 314 static void 315 ofw_cons_putc(dev_t dev, int c) 316 { 317 char cbuf; 318 319 if (c == '\n') { 320 cbuf = '\r'; 321 OF_write(stdout, &cbuf, 1); 322 } 323 324 cbuf = c; 325 OF_write(stdout, &cbuf, 1); 326 } 327