ttycons.c revision 1.11
1 /* $NetBSD: ttycons.c,v 1.11 2011/12/12 17:07:42 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca> 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: ttycons.c,v 1.11 2011/12/12 17:07:42 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/conf.h> 34 #include <sys/proc.h> 35 #include <sys/systm.h> 36 #include <sys/device.h> 37 #include <sys/kauth.h> 38 #include <sys/termios.h> 39 #include <sys/tty.h> 40 41 #include <dev/cons.h> 42 43 #include <machine/mainbus.h> 44 #include <machine/thunk.h> 45 46 static int ttycons_match(device_t, cfdata_t, void *); 47 static void ttycons_attach(device_t, device_t, void *); 48 49 void ttycons_consinit(void); 50 51 struct ttycons_softc { 52 device_t sc_dev; 53 struct tty *sc_tty; 54 void *sc_rd_sih; 55 void *sc_ctrlc_sih; 56 }; 57 58 dev_type_cngetc(ttycons_cngetc); 59 dev_type_cnputc(ttycons_cnputc); 60 dev_type_cnpollc(ttycons_cnpollc); 61 62 static struct cnm_state ttycons_cnm_state; 63 struct consdev ttycons_consdev = { 64 .cn_getc = ttycons_cngetc, 65 .cn_putc = ttycons_cnputc, 66 .cn_pollc = ttycons_cnpollc, 67 .cn_dev = NODEV, 68 .cn_pri = CN_NORMAL, 69 }; 70 71 CFATTACH_DECL_NEW(ttycons, sizeof(struct ttycons_softc), 72 ttycons_match, ttycons_attach, NULL, NULL); 73 74 extern struct cfdriver ttycons_cd; 75 76 dev_type_open(ttycons_open); 77 dev_type_close(ttycons_close); 78 dev_type_read(ttycons_read); 79 dev_type_write(ttycons_write); 80 dev_type_ioctl(ttycons_ioctl); 81 dev_type_stop(ttycons_stop); 82 dev_type_tty(ttycons_tty); 83 dev_type_poll(ttycons_poll); 84 85 const struct cdevsw ttycons_cdevsw = { 86 .d_open = ttycons_open, 87 .d_close = ttycons_close, 88 .d_read = ttycons_read, 89 .d_write = ttycons_write, 90 .d_ioctl = ttycons_ioctl, 91 .d_stop = ttycons_stop, 92 .d_tty = ttycons_tty, 93 .d_poll = ttycons_poll, 94 .d_kqfilter = ttykqfilter, 95 .d_flag = D_TTY, 96 }; 97 98 static void ttycons_start(struct tty *); 99 static int ttycons_param(struct tty *, struct termios *); 100 101 static void ttycons_intr(int); 102 static void ttycons_softintr(void *); 103 104 static void ttycons_ctrlc(int); 105 static void ttycons_softctrlc(void *); 106 107 static int 108 ttycons_match(device_t parent, cfdata_t match, void *opaque) 109 { 110 struct thunkbus_attach_args *taa = opaque; 111 112 if (taa->taa_type != THUNKBUS_TYPE_TTYCONS) 113 return 0; 114 115 return 1; 116 } 117 118 static void 119 ttycons_attach(device_t parent, device_t self, void *opaque) 120 { 121 struct ttycons_softc *sc = device_private(self); 122 int maj; 123 124 aprint_naive("\n"); 125 aprint_normal(": console\n"); 126 127 sc->sc_dev = self; 128 sc->sc_tty = tty_alloc(); 129 tty_attach(sc->sc_tty); 130 sc->sc_tty->t_oproc = ttycons_start; 131 sc->sc_tty->t_param = ttycons_param; 132 133 maj = cdevsw_lookup_major(&ttycons_cdevsw); 134 cn_tab->cn_dev = makedev(maj, device_unit(self)); 135 sc->sc_tty->t_dev = cn_tab->cn_dev; 136 137 sc->sc_rd_sih = softint_establish(SOFTINT_SERIAL, 138 ttycons_softintr, sc); 139 if (sc->sc_rd_sih == NULL) 140 panic("couldn't establish ttycons intr handler\n"); 141 142 sc->sc_ctrlc_sih = softint_establish(SOFTINT_SERIAL, 143 ttycons_softctrlc, sc); 144 if (sc->sc_ctrlc_sih == NULL) 145 panic("couldn't establish ttycons ctrlc handler\n"); 146 147 thunk_signal(SIGIO, ttycons_intr); 148 thunk_signal(SIGINT, ttycons_ctrlc); 149 if (thunk_set_stdin_sigio(true) != 0) 150 panic("couldn't enable stdin async mode"); 151 } 152 153 void 154 ttycons_consinit(void) 155 { 156 struct thunk_termios t; 157 158 thunk_tcgetattr(0, &t); 159 t.c_lflag &= ~(ECHO|ICANON); 160 t.c_cc[VTIME] = 0; 161 t.c_cc[VMIN] = 1; 162 thunk_tcsetattr(0, TCSANOW, &t); 163 164 cn_tab = &ttycons_consdev; 165 cn_init_magic(&ttycons_cnm_state); 166 cn_set_magic("\047\001"); 167 } 168 169 int 170 ttycons_cngetc(dev_t dev) 171 { 172 return thunk_getchar(); 173 } 174 175 void 176 ttycons_cnputc(dev_t dev, int c) 177 { 178 thunk_putchar(c); 179 } 180 181 void 182 ttycons_cnpollc(dev_t dev, int on) 183 { 184 } 185 186 int 187 ttycons_open(dev_t dev, int flag, int mode, lwp_t *l) 188 { 189 struct ttycons_softc *sc; 190 struct tty *t; 191 192 sc = device_lookup_private(&ttycons_cd, minor(dev)); 193 if (sc == NULL) 194 return ENXIO; 195 t = sc->sc_tty; 196 197 if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, t)) 198 return EBUSY; 199 200 if ((t->t_state & TS_ISOPEN) == 0 && t->t_wopen == 0) { 201 t->t_dev = dev; 202 ttychars(t); 203 t->t_iflag = TTYDEF_IFLAG; 204 t->t_oflag = TTYDEF_OFLAG; 205 t->t_cflag = TTYDEF_CFLAG; 206 t->t_lflag = TTYDEF_LFLAG; 207 t->t_ispeed = t->t_ospeed = TTYDEF_SPEED; 208 ttycons_param(t, &t->t_termios); 209 ttsetwater(t); 210 } 211 t->t_state |= TS_CARR_ON; 212 213 return t->t_linesw->l_open(dev, t); 214 } 215 216 int 217 ttycons_close(dev_t dev, int flag, int mode, lwp_t *l) 218 { 219 struct ttycons_softc *sc; 220 struct tty *t; 221 222 sc = device_lookup_private(&ttycons_cd, minor(dev)); 223 t = sc->sc_tty; 224 225 if (t == NULL) 226 return 0; 227 228 t->t_linesw->l_close(t, flag); 229 ttyclose(t); 230 231 return 0; 232 } 233 234 int 235 ttycons_read(dev_t dev, struct uio *uio, int flag) 236 { 237 struct ttycons_softc *sc; 238 struct tty *t; 239 240 sc = device_lookup_private(&ttycons_cd, minor(dev)); 241 t = sc->sc_tty; 242 243 return t->t_linesw->l_read(t, uio, flag); 244 } 245 246 int 247 ttycons_write(dev_t dev, struct uio *uio, int flag) 248 { 249 struct ttycons_softc *sc; 250 struct tty *t; 251 252 sc = device_lookup_private(&ttycons_cd, minor(dev)); 253 t = sc->sc_tty; 254 255 return t->t_linesw->l_write(t, uio, flag); 256 } 257 258 int 259 ttycons_poll(dev_t dev, int events, lwp_t *l) 260 { 261 struct ttycons_softc *sc; 262 struct tty *t; 263 264 sc = device_lookup_private(&ttycons_cd, minor(dev)); 265 t = sc->sc_tty; 266 267 return t->t_linesw->l_poll(t, events, l); 268 } 269 270 struct tty * 271 ttycons_tty(dev_t dev) 272 { 273 struct ttycons_softc *sc; 274 275 sc = device_lookup_private(&ttycons_cd, minor(dev)); 276 277 return sc->sc_tty; 278 } 279 280 int 281 ttycons_ioctl(dev_t dev, u_long cmd, void *data, int flag, lwp_t *l) 282 { 283 struct ttycons_softc *sc; 284 struct tty *t; 285 int error; 286 287 sc = device_lookup_private(&ttycons_cd, minor(dev)); 288 t = sc->sc_tty; 289 290 error = t->t_linesw->l_ioctl(t, cmd, data, flag, l); 291 if (error != EPASSTHROUGH) 292 return error; 293 294 error = ttioctl(t, cmd, data, flag, l); 295 if (error != EPASSTHROUGH) 296 return error; 297 298 return EPASSTHROUGH; 299 } 300 301 static void 302 ttycons_start(struct tty *t) 303 { 304 u_char buf[64+1]; 305 int s, len, i; 306 307 s = spltty(); 308 if (t->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) { 309 splx(s); 310 return; 311 } 312 t->t_state |= TS_BUSY; 313 splx(s); 314 315 len = q_to_b(&t->t_outq, buf, sizeof(buf) - 1); 316 for (i = 0; i < len; i++) { 317 thunk_putchar(buf[i]); 318 } 319 320 s = spltty(); 321 t->t_state &= ~TS_BUSY; 322 if (ttypull(t)) { 323 t->t_state |= TS_TIMEOUT; 324 callout_schedule(&t->t_rstrt_ch, 1); 325 } 326 splx(s); 327 } 328 329 void 330 ttycons_stop(struct tty *t, int flag) 331 { 332 } 333 334 static int 335 ttycons_param(struct tty *t, struct termios *c) 336 { 337 t->t_ispeed = c->c_ispeed; 338 t->t_ospeed = c->c_ospeed; 339 t->t_cflag = c->c_cflag; 340 return 0; 341 } 342 343 static void 344 ttycons_intr(int sig) 345 { 346 struct ttycons_softc *sc; 347 348 curcpu()->ci_idepth++; 349 sc = device_lookup_private(&ttycons_cd, minor(cn_tab->cn_dev)); 350 if (sc) { 351 spl_intr(IPL_SERIAL, softint_schedule, sc->sc_rd_sih); 352 } 353 curcpu()->ci_idepth--; 354 355 } 356 357 static void 358 ttycons_softintr(void *priv) 359 { 360 struct ttycons_softc *sc = priv; 361 struct tty *t = sc->sc_tty; 362 unsigned char ch; 363 int c; 364 365 while ((c = thunk_pollchar()) >= 0) { 366 ch = (unsigned char)c; 367 cn_check_magic(t->t_dev, ch, ttycons_cnm_state); 368 t->t_linesw->l_rint(ch, t); 369 } 370 } 371 372 static void 373 ttycons_ctrlc(int sig) 374 { 375 struct ttycons_softc *sc; 376 377 curcpu()->ci_idepth++; 378 sc = device_lookup_private(&ttycons_cd, minor(cn_tab->cn_dev)); 379 if (sc) { 380 spl_intr(IPL_SERIAL, softint_schedule, sc->sc_ctrlc_sih); 381 } 382 curcpu()->ci_idepth--; 383 384 } 385 386 static void 387 ttycons_softctrlc(void *priv) 388 { 389 struct ttycons_softc *sc = priv; 390 struct tty *t = sc->sc_tty; 391 unsigned char ch = 3; /* ETX */ 392 393 cn_check_magic(t->t_dev, ch, ttycons_cnm_state); 394 t->t_linesw->l_rint(ch, t); 395 } 396
Indexes created Wed Sep 24 05:09:52 GMT 2025