kd.c revision 1.10
1 /* $NetBSD: kd.c,v 1.10 2000/03/21 10:56:23 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Keyboard/Display device. 41 * 42 * This driver exists simply to provide a tty device that 43 * the indirect console driver can point to. 44 * The kbd driver sends its input here. 45 * Output goes to the screen via PROM printf. 46 */ 47 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/systm.h> 51 #include <sys/ioctl.h> 52 #include <sys/tty.h> 53 #include <sys/file.h> 54 #include <sys/conf.h> 55 #include <sys/device.h> 56 57 #include <machine/openfirm.h> 58 #include <machine/eeprom.h> 59 #include <machine/psl.h> 60 #include <machine/cpu.h> 61 #include <machine/kbd.h> 62 #include <machine/autoconf.h> 63 #include <machine/conf.h> 64 65 #ifdef RASTERCONSOLE 66 #include <machine/fbio.h> 67 #include <machine/fbvar.h> 68 #endif 69 70 71 #include <dev/cons.h> 72 #include <dev/sun/event_var.h> 73 #include <dev/sun/kbd_xlate.h> 74 #include <dev/sun/kbdvar.h> 75 #include <sparc64/dev/cons.h> 76 77 struct tty *fbconstty = 0; /* tty structure for frame buffer console */ 78 79 #define KDMAJOR 1 80 #define PUT_WSIZE 64 81 82 struct kd_softc { 83 struct device kd_dev; /* required first: base device */ 84 struct tty *kd_tty; 85 int rows, cols; 86 87 /* Console input hook */ 88 struct cons_channel *kd_in; 89 }; 90 91 /* 92 * There is no point in pretending there might be 93 * more than one keyboard/display device. 94 */ 95 static struct kd_softc kd_softc; 96 static int kd_is_console; 97 98 static int kdparam(struct tty *, struct termios *); 99 static void kdstart(struct tty *); 100 static void kd_init __P((struct kd_softc *)); 101 static void kd_cons_input __P((int)); 102 103 int cons_ocount; /* output byte count */ 104 105 /* 106 * This is called by kbd_attach() 107 * XXX - Make this a proper child of kbd? 108 */ 109 void 110 kd_init(kd) 111 struct kd_softc *kd; 112 { 113 struct tty *tp; 114 int i; 115 char *prop; 116 117 kd = &kd_softc; /* XXX */ 118 119 tp = ttymalloc(); 120 tp->t_oproc = kdstart; 121 tp->t_param = kdparam; 122 tp->t_dev = makedev(KDMAJOR, 0); 123 124 tty_attach(tp); 125 kd->kd_tty = tp; 126 127 /* 128 * get the console struct winsize. 129 */ 130 if (kd_is_console) { 131 fbconstty = tp; 132 #ifdef RASTERCONSOLE 133 kd->rows = fbrcons_rows(); 134 kd->cols = fbrcons_cols(); 135 rcons_ttyinit(tp); 136 #endif 137 } 138 139 if (kd->rows == 0 && 140 (prop = getpropstring(optionsnode, "screen-#rows"))) { 141 i = 0; 142 while (*prop != '\0') 143 i = i * 10 + *prop++ - '0'; 144 kd->rows = (unsigned short)i; 145 } 146 if (kd->cols == 0 && 147 (prop = getpropstring(optionsnode, "screen-#columns"))) { 148 i = 0; 149 while (*prop != '\0') 150 i = i * 10 + *prop++ - '0'; 151 kd->cols = (unsigned short)i; 152 } 153 return; 154 } 155 156 struct tty * 157 kdtty(dev) 158 dev_t dev; 159 { 160 struct kd_softc *kd; 161 162 kd = &kd_softc; /* XXX */ 163 return (kd->kd_tty); 164 } 165 166 int 167 kdopen(dev, flag, mode, p) 168 dev_t dev; 169 int flag, mode; 170 struct proc *p; 171 { 172 struct kd_softc *kd; 173 int error, s, unit; 174 struct tty *tp; 175 static int firstopen = 1; 176 177 unit = minor(dev); 178 if (unit != 0) 179 return ENXIO; 180 kd = &kd_softc; /* XXX */ 181 182 if (firstopen) { 183 kd_init(kd); 184 firstopen = 0; 185 } 186 tp = kd->kd_tty; 187 188 /* It's simpler to do this up here. */ 189 if (((tp->t_state & (TS_ISOPEN | TS_XCLUDE)) 190 == (TS_ISOPEN | TS_XCLUDE)) 191 && (p->p_ucred->cr_uid != 0) ) 192 { 193 return (EBUSY); 194 } 195 196 s = spltty(); 197 198 if ((tp->t_state & TS_ISOPEN) == 0) { 199 /* First open. */ 200 201 /* Notify the input device that serves us */ 202 struct cons_channel *cc = kd->kd_in; 203 if (cc != NULL && 204 (error = (*cc->cc_iopen)(cc)) != 0) { 205 return (error); 206 } 207 208 ttychars(tp); 209 tp->t_iflag = TTYDEF_IFLAG; 210 tp->t_oflag = TTYDEF_OFLAG; 211 tp->t_cflag = TTYDEF_CFLAG; 212 tp->t_lflag = TTYDEF_LFLAG; 213 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 214 (void) kdparam(tp, &tp->t_termios); 215 ttsetwater(tp); 216 tp->t_winsize.ws_row = kd->rows; 217 tp->t_winsize.ws_col = kd->cols; 218 /* Flush pending input? Clear translator? */ 219 /* This (pseudo)device always has SOFTCAR */ 220 tp->t_state |= TS_CARR_ON; 221 } 222 223 splx(s); 224 225 return ((*linesw[tp->t_line].l_open)(dev, tp)); 226 } 227 228 int 229 kdclose(dev, flag, mode, p) 230 dev_t dev; 231 int flag, mode; 232 struct proc *p; 233 { 234 struct kd_softc *kd; 235 struct tty *tp; 236 struct cons_channel *cc; 237 238 kd = &kd_softc; /* XXX */ 239 tp = kd->kd_tty; 240 241 /* XXX This is for cons.c. */ 242 if ((tp->t_state & TS_ISOPEN) == 0) 243 return 0; 244 245 (*linesw[tp->t_line].l_close)(tp, flag); 246 ttyclose(tp); 247 248 if ((cc = kd->kd_in) != NULL) 249 (void)(*cc->cc_iclose)(cc->cc_dev); 250 251 return (0); 252 } 253 254 int 255 kdread(dev, uio, flag) 256 dev_t dev; 257 struct uio *uio; 258 int flag; 259 { 260 struct kd_softc *kd; 261 struct tty *tp; 262 263 kd = &kd_softc; /* XXX */ 264 tp = kd->kd_tty; 265 266 return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); 267 } 268 269 int 270 kdwrite(dev, uio, flag) 271 dev_t dev; 272 struct uio *uio; 273 int flag; 274 { 275 struct kd_softc *kd; 276 struct tty *tp; 277 278 kd = &kd_softc; /* XXX */ 279 tp = kd->kd_tty; 280 281 return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 282 } 283 284 int 285 kdioctl(dev, cmd, data, flag, p) 286 dev_t dev; 287 u_long cmd; 288 caddr_t data; 289 int flag; 290 struct proc *p; 291 { 292 struct kd_softc *kd; 293 struct tty *tp; 294 int error; 295 296 kd = &kd_softc; /* XXX */ 297 tp = kd->kd_tty; 298 299 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 300 if (error >= 0) 301 return error; 302 error = ttioctl(tp, cmd, data, flag, p); 303 if (error >= 0) 304 return error; 305 306 /* Handle any ioctl commands specific to kbd/display. */ 307 /* XXX - Send KB* ioctls to kbd module? */ 308 /* XXX - Send FB* ioctls to fb module? */ 309 310 return ENOTTY; 311 } 312 313 void 314 kdstop(tp, flag) 315 struct tty *tp; 316 int flag; 317 { 318 319 } 320 321 322 static int 323 kdparam(tp, t) 324 struct tty *tp; 325 struct termios *t; 326 { 327 /* XXX - These are ignored... */ 328 tp->t_ispeed = t->c_ispeed; 329 tp->t_ospeed = t->c_ospeed; 330 tp->t_cflag = t->c_cflag; 331 return 0; 332 } 333 334 335 static void kd_later(void*); 336 static void kd_putfb(struct tty *); 337 338 static void 339 kdstart(tp) 340 struct tty *tp; 341 { 342 struct clist *cl; 343 register int s; 344 345 s = spltty(); 346 if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT)) 347 goto out; 348 349 cl = &tp->t_outq; 350 if (cl->c_cc) { 351 if (kd_is_console) { 352 tp->t_state |= TS_BUSY; 353 if ((s & PSR_PIL) == 0) { 354 /* called at level zero - update screen now. */ 355 (void) spllowersoftclock(); 356 kd_putfb(tp); 357 (void) spltty(); 358 tp->t_state &= ~TS_BUSY; 359 } else { 360 /* called at interrupt level - do it later */ 361 timeout(kd_later, (void*)tp, 0); 362 } 363 } else { 364 /* 365 * This driver uses the PROM for writing the screen, 366 * and that only works if this is the console device. 367 * If this is not the console, just flush the output. 368 * Sorry. (In that case, use xdm instead of getty.) 369 */ 370 ndflush(cl, cl->c_cc); 371 } 372 } 373 if (cl->c_cc <= tp->t_lowat) { 374 if (tp->t_state & TS_ASLEEP) { 375 tp->t_state &= ~TS_ASLEEP; 376 wakeup((caddr_t)cl); 377 } 378 selwakeup(&tp->t_wsel); 379 } 380 out: 381 splx(s); 382 } 383 384 /* 385 * Timeout function to do delayed writes to the screen. 386 * Called at splsoftclock when requested by kdstart. 387 */ 388 static void 389 kd_later(tpaddr) 390 void *tpaddr; 391 { 392 struct tty *tp = tpaddr; 393 register int s; 394 395 kd_putfb(tp); 396 397 s = spltty(); 398 tp->t_state &= ~TS_BUSY; 399 (*linesw[tp->t_line].l_start)(tp); 400 splx(s); 401 } 402 403 /* 404 * Put text on the screen using the PROM monitor. 405 * This can take a while, so to avoid missing 406 * interrupts, this is called at splsoftclock. 407 */ 408 static void 409 kd_putfb(tp) 410 struct tty *tp; 411 { 412 char buf[PUT_WSIZE]; 413 struct clist *cl = &tp->t_outq; 414 char *p, *end; 415 int len; 416 417 while ((len = q_to_b(cl, buf, PUT_WSIZE-1)) > 0) { 418 /* PROM will barf if high bits are set. */ 419 p = buf; 420 end = buf + len; 421 while (p < end) 422 *p++ &= 0x7f; 423 /* Now let the PROM print it. */ 424 OF_write(OF_stdout(), buf, len); 425 } 426 } 427 428 void 429 cons_attach_input(cc) 430 struct cons_channel *cc; 431 { 432 struct kd_softc *kd = &kd_softc; 433 434 kd->kd_in = cc; 435 cc->cc_upstream = kd_cons_input; 436 } 437 438 /* 439 * Default PROM-based console input stream 440 */ 441 static int kd_rom_iopen __P((struct cons_channel *)); 442 static int kd_rom_iclose __P((struct cons_channel *)); 443 444 static struct cons_channel prom_cons_channel; 445 446 int 447 kd_rom_iopen(cc) 448 struct cons_channel *cc; 449 { 450 return (0); 451 } 452 453 int 454 kd_rom_iclose(cc) 455 struct cons_channel *cc; 456 { 457 return (0); 458 } 459 460 /* 461 * Our "interrupt" routine for input. This is called by 462 * the keyboard driver (dev/sun/kbd.c) at spltty. 463 */ 464 void 465 kd_cons_input(c) 466 int c; 467 { 468 struct kd_softc *kd = &kd_softc; 469 struct tty *tp; 470 471 /* XXX: Make sure the device is open. */ 472 tp = kd->kd_tty; 473 if (tp == NULL) 474 return; 475 if ((tp->t_state & TS_ISOPEN) == 0) 476 return; 477 478 (*linesw[tp->t_line].l_rint)(c, tp); 479 } 480 481 482 /**************************************************************** 483 * kd console support 484 ****************************************************************/ 485 486 /* The debugger gets its own key translation state. */ 487 static struct kbd_state kdcn_state; 488 489 static void kdcnprobe __P((struct consdev *)); 490 static void kdcninit __P((struct consdev *)); 491 static int kdcngetc __P((dev_t)); 492 static void kdcnputc __P((dev_t, int)); 493 static void kdcnpollc __P((dev_t, int)); 494 495 /* The keyboard driver uses cn_hw to access the real console driver */ 496 extern struct consdev consdev_prom; 497 struct consdev *cn_hw = &consdev_prom; 498 struct consdev consdev_kd = { 499 kdcnprobe, 500 kdcninit, 501 kdcngetc, 502 kdcnputc, 503 kdcnpollc, 504 NULL, 505 }; 506 507 /* We never call this. */ 508 static void 509 kdcnprobe(cn) 510 struct consdev *cn; 511 { 512 } 513 514 static void 515 kdcninit(cn) 516 struct consdev *cn; 517 { 518 struct kbd_state *ks = &kdcn_state; 519 520 cn->cn_dev = makedev(KDMAJOR, 0); 521 cn->cn_pri = CN_INTERNAL; 522 523 /* This prepares kbd_translate() */ 524 ks->kbd_id = KBD_MIN_TYPE; 525 kbd_xlate_init(ks); 526 527 /* Set up initial PROM input channel for /dev/console */ 528 prom_cons_channel.cc_dev = NULL; 529 prom_cons_channel.cc_iopen = kd_rom_iopen; 530 prom_cons_channel.cc_iclose = kd_rom_iclose; 531 cons_attach_input(&prom_cons_channel); 532 533 /* Indicate that it is OK to use the PROM fbwrite */ 534 kd_is_console = 1; 535 } 536 537 static int 538 kdcngetc(dev) 539 dev_t dev; 540 { 541 struct kbd_state *ks = &kdcn_state; 542 int code, class, data, keysym; 543 544 for (;;) { 545 code = (*cn_hw->cn_getc)(dev); 546 keysym = kbd_code_to_keysym(ks, code); 547 class = KEYSYM_CLASS(keysym); 548 549 switch (class) { 550 case KEYSYM_ASCII: 551 goto out; 552 553 case KEYSYM_CLRMOD: 554 case KEYSYM_SETMOD: 555 data = (keysym & 0x1F); 556 /* Only allow ctrl or shift. */ 557 if (data > KBMOD_SHIFT_R) 558 break; 559 data = 1 << data; 560 if (class == KEYSYM_SETMOD) 561 ks->kbd_modbits |= data; 562 else 563 ks->kbd_modbits &= ~data; 564 break; 565 566 case KEYSYM_ALL_UP: 567 /* No toggle keys here. */ 568 ks->kbd_modbits = 0; 569 break; 570 571 default: /* ignore all other keysyms */ 572 break; 573 } 574 } 575 out: 576 return (keysym); 577 } 578 579 static void 580 kdcnputc(dev, c) 581 dev_t dev; 582 int c; 583 { 584 int s; 585 char c0 = (c & 0x7f); 586 587 s = splhigh(); 588 OF_write(OF_stdout(), &c0, 1); 589 splx(s); 590 } 591 592 static void 593 kdcnpollc(dev, on) 594 dev_t dev; 595 int on; 596 { 597 struct kbd_state *ks = &kdcn_state; 598 599 if (on) { 600 /* Entering debugger. */ 601 #if NFB > 0 602 fb_unblank(); 603 #endif 604 /* Clear shift keys too. */ 605 ks->kbd_modbits = 0; 606 } else { 607 /* Resuming kernel. */ 608 } 609 (*cn_hw->cn_pollc)(dev, on); 610 } 611
Indexes created Wed Sep 24 05:09:52 GMT 2025