kd.c revision 1.11
1 /* $NetBSD: kd.c,v 1.11 2000/03/23 06:45:37 thorpej 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 callout_reset(&tp->t_rstrt_ch, 0, 362 kd_later, tp); 363 } 364 } else { 365 /* 366 * This driver uses the PROM for writing the screen, 367 * and that only works if this is the console device. 368 * If this is not the console, just flush the output. 369 * Sorry. (In that case, use xdm instead of getty.) 370 */ 371 ndflush(cl, cl->c_cc); 372 } 373 } 374 if (cl->c_cc <= tp->t_lowat) { 375 if (tp->t_state & TS_ASLEEP) { 376 tp->t_state &= ~TS_ASLEEP; 377 wakeup((caddr_t)cl); 378 } 379 selwakeup(&tp->t_wsel); 380 } 381 out: 382 splx(s); 383 } 384 385 /* 386 * Timeout function to do delayed writes to the screen. 387 * Called at splsoftclock when requested by kdstart. 388 */ 389 static void 390 kd_later(tpaddr) 391 void *tpaddr; 392 { 393 struct tty *tp = tpaddr; 394 register int s; 395 396 kd_putfb(tp); 397 398 s = spltty(); 399 tp->t_state &= ~TS_BUSY; 400 (*linesw[tp->t_line].l_start)(tp); 401 splx(s); 402 } 403 404 /* 405 * Put text on the screen using the PROM monitor. 406 * This can take a while, so to avoid missing 407 * interrupts, this is called at splsoftclock. 408 */ 409 static void 410 kd_putfb(tp) 411 struct tty *tp; 412 { 413 char buf[PUT_WSIZE]; 414 struct clist *cl = &tp->t_outq; 415 char *p, *end; 416 int len; 417 418 while ((len = q_to_b(cl, buf, PUT_WSIZE-1)) > 0) { 419 /* PROM will barf if high bits are set. */ 420 p = buf; 421 end = buf + len; 422 while (p < end) 423 *p++ &= 0x7f; 424 /* Now let the PROM print it. */ 425 OF_write(OF_stdout(), buf, len); 426 } 427 } 428 429 void 430 cons_attach_input(cc) 431 struct cons_channel *cc; 432 { 433 struct kd_softc *kd = &kd_softc; 434 435 kd->kd_in = cc; 436 cc->cc_upstream = kd_cons_input; 437 } 438 439 /* 440 * Default PROM-based console input stream 441 */ 442 static int kd_rom_iopen __P((struct cons_channel *)); 443 static int kd_rom_iclose __P((struct cons_channel *)); 444 445 static struct cons_channel prom_cons_channel; 446 447 int 448 kd_rom_iopen(cc) 449 struct cons_channel *cc; 450 { 451 return (0); 452 } 453 454 int 455 kd_rom_iclose(cc) 456 struct cons_channel *cc; 457 { 458 return (0); 459 } 460 461 /* 462 * Our "interrupt" routine for input. This is called by 463 * the keyboard driver (dev/sun/kbd.c) at spltty. 464 */ 465 void 466 kd_cons_input(c) 467 int c; 468 { 469 struct kd_softc *kd = &kd_softc; 470 struct tty *tp; 471 472 /* XXX: Make sure the device is open. */ 473 tp = kd->kd_tty; 474 if (tp == NULL) 475 return; 476 if ((tp->t_state & TS_ISOPEN) == 0) 477 return; 478 479 (*linesw[tp->t_line].l_rint)(c, tp); 480 } 481 482 483 /**************************************************************** 484 * kd console support 485 ****************************************************************/ 486 487 /* The debugger gets its own key translation state. */ 488 static struct kbd_state kdcn_state; 489 490 static void kdcnprobe __P((struct consdev *)); 491 static void kdcninit __P((struct consdev *)); 492 static int kdcngetc __P((dev_t)); 493 static void kdcnputc __P((dev_t, int)); 494 static void kdcnpollc __P((dev_t, int)); 495 496 /* The keyboard driver uses cn_hw to access the real console driver */ 497 extern struct consdev consdev_prom; 498 struct consdev *cn_hw = &consdev_prom; 499 struct consdev consdev_kd = { 500 kdcnprobe, 501 kdcninit, 502 kdcngetc, 503 kdcnputc, 504 kdcnpollc, 505 NULL, 506 }; 507 508 /* We never call this. */ 509 static void 510 kdcnprobe(cn) 511 struct consdev *cn; 512 { 513 } 514 515 static void 516 kdcninit(cn) 517 struct consdev *cn; 518 { 519 struct kbd_state *ks = &kdcn_state; 520 521 cn->cn_dev = makedev(KDMAJOR, 0); 522 cn->cn_pri = CN_INTERNAL; 523 524 /* This prepares kbd_translate() */ 525 ks->kbd_id = KBD_MIN_TYPE; 526 kbd_xlate_init(ks); 527 528 /* Set up initial PROM input channel for /dev/console */ 529 prom_cons_channel.cc_dev = NULL; 530 prom_cons_channel.cc_iopen = kd_rom_iopen; 531 prom_cons_channel.cc_iclose = kd_rom_iclose; 532 cons_attach_input(&prom_cons_channel); 533 534 /* Indicate that it is OK to use the PROM fbwrite */ 535 kd_is_console = 1; 536 } 537 538 static int 539 kdcngetc(dev) 540 dev_t dev; 541 { 542 struct kbd_state *ks = &kdcn_state; 543 int code, class, data, keysym; 544 545 for (;;) { 546 code = (*cn_hw->cn_getc)(dev); 547 keysym = kbd_code_to_keysym(ks, code); 548 class = KEYSYM_CLASS(keysym); 549 550 switch (class) { 551 case KEYSYM_ASCII: 552 goto out; 553 554 case KEYSYM_CLRMOD: 555 case KEYSYM_SETMOD: 556 data = (keysym & 0x1F); 557 /* Only allow ctrl or shift. */ 558 if (data > KBMOD_SHIFT_R) 559 break; 560 data = 1 << data; 561 if (class == KEYSYM_SETMOD) 562 ks->kbd_modbits |= data; 563 else 564 ks->kbd_modbits &= ~data; 565 break; 566 567 case KEYSYM_ALL_UP: 568 /* No toggle keys here. */ 569 ks->kbd_modbits = 0; 570 break; 571 572 default: /* ignore all other keysyms */ 573 break; 574 } 575 } 576 out: 577 return (keysym); 578 } 579 580 static void 581 kdcnputc(dev, c) 582 dev_t dev; 583 int c; 584 { 585 int s; 586 char c0 = (c & 0x7f); 587 588 s = splhigh(); 589 OF_write(OF_stdout(), &c0, 1); 590 splx(s); 591 } 592 593 static void 594 kdcnpollc(dev, on) 595 dev_t dev; 596 int on; 597 { 598 struct kbd_state *ks = &kdcn_state; 599 600 if (on) { 601 /* Entering debugger. */ 602 #if NFB > 0 603 fb_unblank(); 604 #endif 605 /* Clear shift keys too. */ 606 ks->kbd_modbits = 0; 607 } else { 608 /* Resuming kernel. */ 609 } 610 (*cn_hw->cn_pollc)(dev, on); 611 } 612
Indexes created Mon Sep 22 10:09:38 GMT 2025