kd.c revision 1.26.2.4
1 /* $NetBSD: kd.c,v 1.26.2.4 2004/09/21 13:22:41 skrll 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/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: kd.c,v 1.26.2.4 2004/09/21 13:22:41 skrll Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/systm.h> 54 #include <sys/ioctl.h> 55 #include <sys/tty.h> 56 #include <sys/file.h> 57 #include <sys/conf.h> 58 #include <sys/device.h> 59 60 #include <machine/openfirm.h> 61 #include <machine/eeprom.h> 62 #include <machine/psl.h> 63 #include <machine/cpu.h> 64 #include <machine/kbd.h> 65 #include <machine/autoconf.h> 66 67 #ifdef RASTERCONSOLE 68 #include <dev/sun/fbio.h> 69 #include <dev/sun/fbvar.h> 70 #endif 71 72 73 #include <dev/cons.h> 74 #include <dev/sun/event_var.h> 75 #include <dev/sun/kbd_xlate.h> 76 #include <dev/sun/kbdvar.h> 77 #include <sparc64/dev/cons.h> 78 79 dev_type_open(kdopen); 80 dev_type_close(kdclose); 81 dev_type_read(kdread); 82 dev_type_write(kdwrite); 83 dev_type_ioctl(kdioctl); 84 dev_type_tty(kdtty); 85 dev_type_poll(kdpoll); 86 87 const struct cdevsw kd_cdevsw = { 88 kdopen, kdclose, kdread, kdwrite, kdioctl, 89 nostop, kdtty, kdpoll, nommap, ttykqfilter, D_TTY 90 }; 91 92 struct tty *fbconstty = 0; /* tty structure for frame buffer console */ 93 94 #define PUT_WSIZE 64 95 96 struct kd_softc { 97 struct device kd_dev; /* required first: base device */ 98 struct tty *kd_tty; 99 int rows, cols; 100 101 /* Console input hook */ 102 struct cons_channel *kd_in; 103 }; 104 105 /* 106 * There is no point in pretending there might be 107 * more than one keyboard/display device. 108 */ 109 static struct kd_softc kd_softc; 110 static int kd_is_console; 111 112 static int kdparam(struct tty *, struct termios *); 113 static void kdstart(struct tty *); 114 static void kd_init __P((struct kd_softc *)); 115 static void kd_cons_input __P((int)); 116 static int kdcngetc __P((dev_t)); 117 118 int cons_ocount; /* output byte count */ 119 120 /* 121 * This is called by kbd_attach() 122 * XXX - Make this a proper child of kbd? 123 */ 124 void 125 kd_init(kd) 126 struct kd_softc *kd; 127 { 128 struct tty *tp; 129 char prop[6+1]; 130 131 kd = &kd_softc; /* XXX */ 132 133 tp = ttymalloc(); 134 tp->t_oproc = kdstart; 135 tp->t_param = kdparam; 136 tp->t_dev = makedev(cdevsw_lookup_major(&kd_cdevsw), 0); 137 138 tty_attach(tp); 139 kd->kd_tty = tp; 140 141 /* 142 * get the console struct winsize. 143 */ 144 if (kd_is_console) { 145 fbconstty = tp; 146 #ifdef RASTERCONSOLE 147 kd->rows = fbrcons_rows(); 148 kd->cols = fbrcons_cols(); 149 rcons_ttyinit(tp); 150 #endif 151 } 152 153 if (kd->rows == 0 && 154 prom_getoption("screen-#rows", prop, sizeof prop) == 0) 155 kd->rows = strtoul(prop, NULL, 10); 156 157 if (kd->cols == 0 && 158 prom_getoption("screen-#columns", prop, sizeof prop) == 0) 159 kd->cols = strtoul(prop, NULL, 10); 160 } 161 162 struct tty * 163 kdtty(dev) 164 dev_t dev; 165 { 166 struct kd_softc *kd; 167 168 kd = &kd_softc; /* XXX */ 169 return (kd->kd_tty); 170 } 171 172 int 173 kdopen(dev, flag, mode, l) 174 dev_t dev; 175 int flag, mode; 176 struct lwp *l; 177 { 178 struct kd_softc *kd; 179 int error, s, unit; 180 struct tty *tp; 181 struct proc *p = l->l_proc; 182 static int firstopen = 1; 183 184 unit = minor(dev); 185 if (unit != 0) 186 return ENXIO; 187 kd = &kd_softc; /* XXX */ 188 189 if (firstopen) { 190 kd_init(kd); 191 firstopen = 0; 192 } 193 tp = kd->kd_tty; 194 195 /* It's simpler to do this up here. */ 196 if (((tp->t_state & (TS_ISOPEN | TS_XCLUDE)) 197 == (TS_ISOPEN | TS_XCLUDE)) 198 && (p->p_ucred->cr_uid != 0) ) 199 { 200 return (EBUSY); 201 } 202 203 s = spltty(); 204 205 if ((tp->t_state & TS_ISOPEN) == 0) { 206 /* First open. */ 207 208 /* Notify the input device that serves us */ 209 struct cons_channel *cc = kd->kd_in; 210 if (cc != NULL && 211 (error = (*cc->cc_iopen)(cc)) != 0) { 212 splx(s); 213 return (error); 214 } 215 216 ttychars(tp); 217 tp->t_iflag = TTYDEF_IFLAG; 218 tp->t_oflag = TTYDEF_OFLAG; 219 tp->t_cflag = TTYDEF_CFLAG; 220 tp->t_lflag = TTYDEF_LFLAG; 221 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 222 (void) kdparam(tp, &tp->t_termios); 223 ttsetwater(tp); 224 tp->t_winsize.ws_row = kd->rows; 225 tp->t_winsize.ws_col = kd->cols; 226 /* Flush pending input? Clear translator? */ 227 /* This (pseudo)device always has SOFTCAR */ 228 tp->t_state |= TS_CARR_ON; 229 } 230 231 splx(s); 232 233 return ((*tp->t_linesw->l_open)(dev, tp)); 234 } 235 236 int 237 kdclose(dev, flag, mode, l) 238 dev_t dev; 239 int flag, mode; 240 struct lwp *l; 241 { 242 struct kd_softc *kd; 243 struct tty *tp; 244 struct cons_channel *cc; 245 246 kd = &kd_softc; /* XXX */ 247 tp = kd->kd_tty; 248 249 /* XXX This is for cons.c. */ 250 if ((tp->t_state & TS_ISOPEN) == 0) 251 return 0; 252 253 (*tp->t_linesw->l_close)(tp, flag); 254 ttyclose(tp); 255 256 if ((cc = kd->kd_in) != NULL) 257 (void)(*cc->cc_iclose)(cc); 258 259 return (0); 260 } 261 262 int 263 kdread(dev, uio, flag) 264 dev_t dev; 265 struct uio *uio; 266 int flag; 267 { 268 struct kd_softc *kd; 269 struct tty *tp; 270 271 kd = &kd_softc; /* XXX */ 272 tp = kd->kd_tty; 273 274 return ((*tp->t_linesw->l_read)(tp, uio, flag)); 275 } 276 277 int 278 kdwrite(dev, uio, flag) 279 dev_t dev; 280 struct uio *uio; 281 int flag; 282 { 283 struct kd_softc *kd; 284 struct tty *tp; 285 286 kd = &kd_softc; /* XXX */ 287 tp = kd->kd_tty; 288 289 return ((*tp->t_linesw->l_write)(tp, uio, flag)); 290 } 291 292 int 293 kdpoll(dev, events, l) 294 dev_t dev; 295 int events; 296 struct lwp *l; 297 { 298 struct kd_softc *kd; 299 struct tty *tp; 300 301 kd = &kd_softc; /* XXX */ 302 tp = kd->kd_tty; 303 304 return ((*tp->t_linesw->l_poll)(tp, events, l)); 305 } 306 307 int 308 kdioctl(dev, cmd, data, flag, l) 309 dev_t dev; 310 u_long cmd; 311 caddr_t data; 312 int flag; 313 struct lwp *l; 314 { 315 struct kd_softc *kd; 316 struct tty *tp; 317 int error; 318 319 kd = &kd_softc; /* XXX */ 320 tp = kd->kd_tty; 321 322 error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l); 323 if (error != EPASSTHROUGH) 324 return error; 325 326 error = ttioctl(tp, cmd, data, flag, l); 327 if (error != EPASSTHROUGH) 328 return error; 329 330 /* Handle any ioctl commands specific to kbd/display. */ 331 /* XXX - Send KB* ioctls to kbd module? */ 332 /* XXX - Send FB* ioctls to fb module? */ 333 334 return EPASSTHROUGH; 335 } 336 337 static int 338 kdparam(tp, t) 339 struct tty *tp; 340 struct termios *t; 341 { 342 /* XXX - These are ignored... */ 343 tp->t_ispeed = t->c_ispeed; 344 tp->t_ospeed = t->c_ospeed; 345 tp->t_cflag = t->c_cflag; 346 return 0; 347 } 348 349 350 static void kd_later(void*); 351 static void kd_putfb(struct tty *); 352 353 static void 354 kdstart(tp) 355 struct tty *tp; 356 { 357 struct clist *cl; 358 register int s; 359 360 s = spltty(); 361 if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT)) 362 goto out; 363 364 cl = &tp->t_outq; 365 if (cl->c_cc) { 366 if (kd_is_console) { 367 tp->t_state |= TS_BUSY; 368 if (s == 0) { 369 /* called at level zero - update screen now. */ 370 (void) spllowersoftclock(); 371 kd_putfb(tp); 372 (void) spltty(); 373 tp->t_state &= ~TS_BUSY; 374 } else { 375 /* called at interrupt level - do it later */ 376 callout_reset(&tp->t_rstrt_ch, 0, 377 kd_later, tp); 378 } 379 } else { 380 /* 381 * This driver uses the PROM for writing the screen, 382 * and that only works if this is the console device. 383 * If this is not the console, just flush the output. 384 * Sorry. (In that case, use xdm instead of getty.) 385 */ 386 ndflush(cl, cl->c_cc); 387 } 388 } 389 if (cl->c_cc <= tp->t_lowat) { 390 if (tp->t_state & TS_ASLEEP) { 391 tp->t_state &= ~TS_ASLEEP; 392 wakeup((caddr_t)cl); 393 } 394 selwakeup(&tp->t_wsel); 395 } 396 out: 397 splx(s); 398 } 399 400 /* 401 * Timeout function to do delayed writes to the screen. 402 * Called at splsoftclock when requested by kdstart. 403 */ 404 static void 405 kd_later(tpaddr) 406 void *tpaddr; 407 { 408 struct tty *tp = tpaddr; 409 register int s; 410 411 kd_putfb(tp); 412 413 s = spltty(); 414 tp->t_state &= ~TS_BUSY; 415 (*tp->t_linesw->l_start)(tp); 416 splx(s); 417 } 418 419 /* 420 * Put text on the screen using the PROM monitor. 421 * This can take a while, so to avoid missing 422 * interrupts, this is called at splsoftclock. 423 */ 424 static void 425 kd_putfb(tp) 426 struct tty *tp; 427 { 428 char buf[PUT_WSIZE]; 429 struct clist *cl = &tp->t_outq; 430 char *p, *end; 431 int len; 432 433 while ((len = q_to_b(cl, buf, PUT_WSIZE-1)) > 0) { 434 /* PROM will barf if high bits are set. */ 435 p = buf; 436 end = buf + len; 437 while (p < end) 438 *p++ &= 0x7f; 439 /* Now let the PROM print it. */ 440 prom_write(prom_stdout(), buf, len); 441 } 442 } 443 444 /* 445 * Default PROM-based console input stream 446 */ 447 static int kd_rom_iopen __P((struct cons_channel *)); 448 static int kd_rom_iclose __P((struct cons_channel *)); 449 450 static struct cons_channel prom_cons_channel; 451 452 int 453 kd_rom_iopen(cc) 454 struct cons_channel *cc; 455 { 456 return (0); 457 } 458 459 int 460 kd_rom_iclose(cc) 461 struct cons_channel *cc; 462 { 463 return (0); 464 } 465 466 /* 467 * Our "interrupt" routine for input. This is called by 468 * the keyboard driver (dev/sun/kbd.c) at spltty. 469 */ 470 void 471 kd_cons_input(c) 472 int c; 473 { 474 struct kd_softc *kd = &kd_softc; 475 struct tty *tp; 476 477 /* XXX: Make sure the device is open. */ 478 tp = kd->kd_tty; 479 if (tp == NULL) 480 return; 481 if ((tp->t_state & TS_ISOPEN) == 0) 482 return; 483 484 (*tp->t_linesw->l_rint)(c, tp); 485 } 486 487 488 /**************************************************************** 489 * kd console support 490 ****************************************************************/ 491 492 /* The debugger gets its own key translation state. */ 493 static struct kbd_state *kdcn_state; 494 495 static void kdcnprobe __P((struct consdev *)); 496 static void kdcninit __P((struct consdev *)); 497 static void kdcnputc __P((dev_t, int)); 498 static void kdcnpollc __P((dev_t, int)); 499 500 /* The keyboard driver uses cn_hw to access the real console driver */ 501 extern struct consdev consdev_prom; 502 struct consdev consdev_kd = { 503 kdcnprobe, 504 kdcninit, 505 kdcngetc, 506 kdcnputc, 507 kdcnpollc, 508 NULL, 509 }; 510 struct consdev *cn_hw = &consdev_kd; 511 512 void 513 cons_attach_input(cc, cn) 514 struct cons_channel *cc; 515 struct consdev *cn; 516 { 517 struct kd_softc *kd = &kd_softc; 518 struct kbd_softc *kds = cc->cc_dev; 519 struct kbd_state *ks; 520 521 /* Share the keyboard state */ 522 kdcn_state = ks = &kds->k_state; 523 524 kd->kd_in = cc; 525 cc->cc_upstream = kd_cons_input; 526 527 /* Attach lower level. */ 528 cn_hw->cn_dev = cn->cn_dev; 529 cn_hw->cn_pollc = cn->cn_pollc; 530 cn_hw->cn_getc = cn->cn_getc; 531 532 /* Attach us as console. */ 533 cn_tab->cn_dev = makedev(cdevsw_lookup_major(&kd_cdevsw), 0); 534 cn_tab->cn_probe = kdcnprobe; 535 cn_tab->cn_init = kdcninit; 536 cn_tab->cn_getc = kdcngetc; 537 cn_tab->cn_pollc = kdcnpollc; 538 cn_tab->cn_pri = CN_INTERNAL; 539 540 /* Set up initial PROM input channel for /dev/console */ 541 prom_cons_channel.cc_dev = NULL; 542 prom_cons_channel.cc_iopen = kd_rom_iopen; 543 prom_cons_channel.cc_iclose = kd_rom_iclose; 544 545 /* Indicate that it is OK to use the PROM fbwrite */ 546 kd_is_console = 1; 547 } 548 549 550 void kd_attach_input(struct cons_channel *); 551 void 552 kd_attach_input(cc) 553 struct cons_channel *cc; 554 { 555 struct kd_softc *kd = &kd_softc; 556 557 kd->kd_in = cc; 558 cc->cc_upstream = kd_cons_input; 559 } 560 561 562 /* We never call this. */ 563 static void 564 kdcnprobe(cn) 565 struct consdev *cn; 566 { 567 } 568 569 static void 570 kdcninit(cn) 571 struct consdev *cn; 572 { 573 #if 0 574 struct kbd_state *ks = kdcn_state; 575 576 cn->cn_dev = makedev(cdevsw_lookup_major(&kd_cdevsw), 0); 577 cn->cn_pri = CN_INTERNAL; 578 579 /* This prepares kbd_translate() */ 580 ks->kbd_id = KBD_MIN_TYPE; 581 kbd_xlate_init(ks); 582 583 /* Set up initial PROM input channel for /dev/console */ 584 prom_cons_channel.cc_dev = NULL; 585 prom_cons_channel.cc_iopen = kd_rom_iopen; 586 prom_cons_channel.cc_iclose = kd_rom_iclose; 587 cons_attach_input(&prom_cons_channel); 588 589 /* Indicate that it is OK to use the PROM fbwrite */ 590 kd_is_console = 1; 591 #endif 592 } 593 594 static int 595 kdcngetc(dev) 596 dev_t dev; 597 { 598 struct kbd_state *ks = kdcn_state; 599 int code, class, data, keysym; 600 extern int prom_cngetc __P((dev_t)); 601 602 603 if (cn_hw->cn_getc == prom_cngetc) return (*cn_hw->cn_getc)(dev); 604 for (;;) { 605 code = (*cn_hw->cn_getc)(dev); 606 keysym = kbd_code_to_keysym(ks, code); 607 class = KEYSYM_CLASS(keysym); 608 609 switch (class) { 610 case KEYSYM_ASCII: 611 goto out; 612 613 case KEYSYM_CLRMOD: 614 case KEYSYM_SETMOD: 615 data = (keysym & 0x1F); 616 /* Only allow ctrl or shift. */ 617 if (data > KBMOD_SHIFT_R) 618 break; 619 data = 1 << data; 620 if (class == KEYSYM_SETMOD) 621 ks->kbd_modbits |= data; 622 else 623 ks->kbd_modbits &= ~data; 624 break; 625 626 case KEYSYM_ALL_UP: 627 /* No toggle keys here. */ 628 ks->kbd_modbits = 0; 629 break; 630 631 default: /* ignore all other keysyms */ 632 break; 633 } 634 } 635 out: 636 return (keysym); 637 } 638 639 static void 640 kdcnputc(dev, c) 641 dev_t dev; 642 int c; 643 { 644 int s; 645 char c0 = (c & 0x7f); 646 647 s = splhigh(); 648 prom_write(prom_stdout(), &c0, 1); 649 splx(s); 650 } 651 652 static void 653 kdcnpollc(dev, on) 654 dev_t dev; 655 int on; 656 { 657 struct kbd_state *ks = kdcn_state; 658 659 if (on) { 660 /* Entering debugger. */ 661 #if NFB > 0 662 fb_unblank(); 663 #endif 664 /* Clear shift keys too. */ 665 ks->kbd_modbits = 0; 666 } else { 667 /* Resuming kernel. */ 668 } 669 (*cn_hw->cn_pollc)(dev, on); 670 } 671
Indexes created Thu Oct 02 14:10:14 GMT 2025