cgeight.c revision 1.14
1 /* $NetBSD: cgeight.c,v 1.14 1997/10/05 18:24:32 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * Copyright (c) 1995 Theo de Raadt 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This software was developed by the Computer Systems Engineering group 45 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 46 * contributed to Berkeley. 47 * 48 * All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by the University of 51 * California, Lawrence Berkeley Laboratory. 52 * 53 * Redistribution and use in source and binary forms, with or without 54 * modification, are permitted provided that the following conditions 55 * are met: 56 * 1. Redistributions of source code must retain the above copyright 57 * notice, this list of conditions and the following disclaimer. 58 * 2. Redistributions in binary form must reproduce the above copyright 59 * notice, this list of conditions and the following disclaimer in the 60 * documentation and/or other materials provided with the distribution. 61 * 3. All advertising materials mentioning features or use of this software 62 * must display the following acknowledgement: 63 * This product includes software developed by the University of 64 * California, Berkeley and its contributors. 65 * 4. Neither the name of the University nor the names of its contributors 66 * may be used to endorse or promote products derived from this software 67 * without specific prior written permission. 68 * 69 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 70 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 71 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 72 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 73 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 74 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 75 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 76 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 77 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 78 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 79 * SUCH DAMAGE. 80 * 81 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 82 */ 83 84 /* 85 * color display (cgeight) driver. 86 * 87 * Does not handle interrupts, even though they can occur. 88 * 89 * XXX should defer colormap updates to vertical retrace interrupts 90 */ 91 92 #include <sys/param.h> 93 #include <sys/systm.h> 94 #include <sys/buf.h> 95 #include <sys/device.h> 96 #include <sys/ioctl.h> 97 #include <sys/malloc.h> 98 #include <sys/mman.h> 99 #include <sys/tty.h> 100 #include <sys/conf.h> 101 102 #include <vm/vm.h> 103 104 #include <machine/fbio.h> 105 #include <machine/autoconf.h> 106 #include <machine/pmap.h> 107 #include <machine/fbvar.h> 108 #include <machine/eeprom.h> 109 #include <machine/conf.h> 110 111 #include <sparc/dev/btreg.h> 112 #include <sparc/dev/btvar.h> 113 #include <sparc/dev/pfourreg.h> 114 115 /* per-display variables */ 116 struct cgeight_softc { 117 struct device sc_dev; /* base device */ 118 struct fbdevice sc_fb; /* frame buffer device */ 119 struct rom_reg sc_phys; /* display RAM (phys addr) */ 120 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 121 int sc_bustype; /* type of bus we live on */ 122 union bt_cmap sc_cmap; /* Brooktree color map */ 123 }; 124 125 /* autoconfiguration driver */ 126 static void cgeightattach(struct device *, struct device *, void *); 127 static int cgeightmatch(struct device *, struct cfdata *, void *); 128 #if defined(SUN4) 129 static void cgeightunblank __P((struct device *)); 130 #endif 131 132 /* cdevsw prototypes */ 133 cdev_decl(cgeight); 134 135 struct cfattach cgeight_ca = { 136 sizeof(struct cgeight_softc), cgeightmatch, cgeightattach 137 }; 138 139 struct cfdriver cgeight_cd = { 140 NULL, "cgeight", DV_DULL 141 }; 142 143 #if defined(SUN4) 144 /* frame buffer generic driver */ 145 static struct fbdriver cgeightfbdriver = { 146 cgeightunblank, cgeightopen, cgeightclose, cgeightioctl, 147 cgeightpoll, cgeightmmap 148 }; 149 150 extern int fbnode; 151 extern struct tty *fbconstty; 152 153 static void cgeightloadcmap __P((struct cgeight_softc *, int, int)); 154 static int cgeight_get_video __P((struct cgeight_softc *)); 155 static void cgeight_set_video __P((struct cgeight_softc *, int)); 156 #endif 157 158 /* 159 * Match a cgeight. 160 */ 161 int 162 cgeightmatch(parent, cf, aux) 163 struct device *parent; 164 struct cfdata *cf; 165 void *aux; 166 { 167 struct confargs *ca = aux; 168 struct romaux *ra = &ca->ca_ra; 169 170 if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) 171 return (0); 172 173 /* 174 * Mask out invalid flags from the user. 175 */ 176 cf->cf_flags &= FB_USERMASK; 177 178 /* 179 * Only exists on a sun4. 180 */ 181 if (!CPU_ISSUN4) 182 return (0); 183 184 /* 185 * Only exists on obio. 186 */ 187 if (ca->ca_bustype != BUS_OBIO) 188 return (0); 189 190 /* 191 * Make sure there's hardware there. 192 */ 193 if (probeget(ra->ra_vaddr, 4) == -1) 194 return (0); 195 196 #if defined(SUN4) 197 /* 198 * Check the pfour register. 199 */ 200 if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR24) { 201 cf->cf_flags |= FB_PFOUR; 202 return (1); 203 } 204 #endif 205 206 return (0); 207 } 208 209 /* 210 * Attach a display. We need to notice if it is the console, too. 211 */ 212 void 213 cgeightattach(parent, self, args) 214 struct device *parent, *self; 215 void *args; 216 { 217 #if defined(SUN4) 218 register struct cgeight_softc *sc = (struct cgeight_softc *)self; 219 register struct confargs *ca = args; 220 register int node = 0, ramsize, i; 221 register volatile struct bt_regs *bt; 222 struct fbdevice *fb = &sc->sc_fb; 223 int isconsole; 224 225 fb->fb_driver = &cgeightfbdriver; 226 fb->fb_device = &sc->sc_dev; 227 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 228 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 229 230 /* 231 * Only pfour cgfours, thank you... 232 */ 233 if ((ca->ca_bustype != BUS_OBIO) || 234 ((fb->fb_flags & FB_PFOUR) == 0)) { 235 printf("%s: ignoring; not a pfour\n", sc->sc_dev.dv_xname); 236 return; 237 } 238 239 /* Map the pfour register. */ 240 fb->fb_pfour = (volatile u_int32_t *) 241 mapiodev(ca->ca_ra.ra_reg, 0, sizeof(u_int32_t)); 242 243 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 244 245 fb->fb_type.fb_depth = 24; 246 fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); 247 248 sc->sc_fb.fb_type.fb_cmsize = 256; 249 sc->sc_fb.fb_type.fb_size = ramsize; 250 printf(": cgeight/p4, %d x %d", fb->fb_type.fb_width, 251 fb->fb_type.fb_height); 252 253 isconsole = 0; 254 255 if (cputyp == CPU_SUN4) { 256 struct eeprom *eep = (struct eeprom *)eeprom_va; 257 258 /* 259 * Assume this is the console if there's no eeprom info 260 * to be found. 261 */ 262 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 263 isconsole = (fbconstty != NULL); 264 } 265 266 #if 0 267 /* 268 * We don't do any of the console handling here. Instead, 269 * we let the bwtwo driver pick up the overlay plane and 270 * use it instead. Rconsole should have better performance 271 * with the 1-bit depth. 272 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 273 */ 274 275 /* 276 * When the ROM has mapped in a cgfour display, the address 277 * maps only the video RAM, so in any case we have to map the 278 * registers ourselves. We only need the video RAM if we are 279 * going to print characters via rconsole. 280 */ 281 282 if (isconsole) { 283 /* XXX this is kind of a waste */ 284 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 285 PFOUR_COLOR_OFF_OVERLAY, ramsize); 286 } 287 #endif 288 289 /* Map the Brooktree. */ 290 sc->sc_fbc = (volatile struct fbcontrol *) 291 mapiodev(ca->ca_ra.ra_reg, 292 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol)); 293 294 sc->sc_phys = ca->ca_ra.ra_reg[0]; 295 sc->sc_bustype = ca->ca_bustype; 296 297 #if 0 /* XXX thorpej ??? */ 298 /* tell the enable plane to look at the mono image */ 299 memset(ca->ca_ra.ra_vaddr, 0xff, 300 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 301 #endif 302 303 /* grab initial (current) color map */ 304 bt = &sc->sc_fbc->fbc_dac; 305 bt->bt_addr = 0; 306 for (i = 0; i < 256 * 3 / 4; i++) 307 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 308 309 BT_INIT(bt, 0); 310 311 #if 0 /* see above */ 312 if (isconsole) { 313 printf(" (console)\n"); 314 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 315 fbrcons_init(fb); 316 #endif 317 } else 318 #endif /* 0 */ 319 printf("\n"); 320 321 /* 322 * Even though we're not using rconsole, we'd still like 323 * to notice if we're the console framebuffer. 324 */ 325 fb_attach(&sc->sc_fb, isconsole); 326 #endif 327 } 328 329 int 330 cgeightopen(dev, flags, mode, p) 331 dev_t dev; 332 int flags, mode; 333 struct proc *p; 334 { 335 int unit = minor(dev); 336 337 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 338 return (ENXIO); 339 return (0); 340 } 341 342 int 343 cgeightclose(dev, flags, mode, p) 344 dev_t dev; 345 int flags, mode; 346 struct proc *p; 347 { 348 349 return (0); 350 } 351 352 int 353 cgeightioctl(dev, cmd, data, flags, p) 354 dev_t dev; 355 u_long cmd; 356 register caddr_t data; 357 int flags; 358 struct proc *p; 359 { 360 #if defined(SUN4) 361 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 362 register struct fbgattr *fba; 363 int error; 364 365 switch (cmd) { 366 367 case FBIOGTYPE: 368 *(struct fbtype *)data = sc->sc_fb.fb_type; 369 break; 370 371 case FBIOGATTR: 372 fba = (struct fbgattr *)data; 373 fba->real_type = sc->sc_fb.fb_type.fb_type; 374 fba->owner = 0; /* XXX ??? */ 375 fba->fbtype = sc->sc_fb.fb_type; 376 fba->sattr.flags = 0; 377 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 378 fba->sattr.dev_specific[0] = -1; 379 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 380 fba->emu_types[1] = -1; 381 break; 382 383 case FBIOGETCMAP: 384 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 385 386 case FBIOPUTCMAP: 387 /* copy to software map */ 388 #define p ((struct fbcmap *)data) 389 error = bt_putcmap(p, &sc->sc_cmap, 256); 390 if (error) 391 return (error); 392 /* now blast them into the chip */ 393 /* XXX should use retrace interrupt */ 394 cgeightloadcmap(sc, p->index, p->count); 395 #undef p 396 break; 397 398 case FBIOGVIDEO: 399 *(int *)data = cgeight_get_video(sc); 400 break; 401 402 case FBIOSVIDEO: 403 cgeight_set_video(sc, *(int *)data); 404 break; 405 406 default: 407 return (ENOTTY); 408 } 409 #endif 410 return (0); 411 } 412 413 int 414 cgeightpoll(dev, events, p) 415 dev_t dev; 416 int events; 417 struct proc *p; 418 { 419 420 return (seltrue(dev, events, p)); 421 } 422 423 /* 424 * Return the address that would map the given device at the given 425 * offset, allowing for the given protection, or return -1 for error. 426 * 427 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 428 * enable plane for 128K, followed by the colour for as long as it 429 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 430 * register for NBPG, then the bootrom for 0x40000. 431 */ 432 int 433 cgeightmmap(dev, off, prot) 434 dev_t dev; 435 int off, prot; 436 { 437 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 438 int poff; 439 440 #define START_ENABLE (128*1024) 441 #define START_COLOR ((128*1024) + (128*1024)) 442 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 443 sc->sc_fb.fb_type.fb_height * 3) 444 #define END_COLOR (START_COLOR + COLOR_SIZE) 445 #define START_SPECIAL 0x800000 446 #define PROMSIZE 0x40000 447 #define NOOVERLAY (0x04000000) 448 449 if (off & PGOFSET) 450 panic("cgeightmap"); 451 452 if ((u_int)off >= NOOVERLAY) { 453 off -= NOOVERLAY; 454 455 /* 456 * X11 maps a huge chunk of the frame buffer; far more than 457 * there really is. We compensate by double-mapping the 458 * first page for as many other pages as it wants 459 */ 460 while (off >= COLOR_SIZE) 461 off -= COLOR_SIZE; /* XXX thorpej ??? */ 462 463 poff = off + PFOUR_COLOR_OFF_COLOR; 464 } else if ((u_int)off < START_ENABLE) { 465 /* 466 * in overlay plane 467 */ 468 poff = PFOUR_COLOR_OFF_OVERLAY + off; 469 } else if ((u_int)off < START_COLOR) { 470 /* 471 * in enable plane 472 */ 473 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 474 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 475 /* 476 * in colour plane 477 */ 478 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 479 } else if ((u_int)off < START_SPECIAL) { 480 /* 481 * hole 482 */ 483 poff = 0; /* XXX */ 484 } else if ((u_int)off == START_SPECIAL) { 485 /* 486 * colour map (Brooktree) 487 */ 488 poff = PFOUR_COLOR_OFF_CMAP; 489 } else if ((u_int)off == START_SPECIAL + NBPG) { 490 /* 491 * p4 register 492 */ 493 poff = 0; 494 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 495 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 496 /* 497 * rom 498 */ 499 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 500 } else 501 return (-1); 502 /* 503 * I turned on PMAP_NC here to disable the cache as I was 504 * getting horribly broken behaviour with it on. 505 */ 506 return (REG2PHYS(&sc->sc_phys, poff) | PMAP_NC); 507 } 508 509 #if defined(SUN4) 510 /* 511 * Undo the effect of an FBIOSVIDEO that turns the video off. 512 */ 513 static void 514 cgeightunblank(dev) 515 struct device *dev; 516 { 517 518 cgeight_set_video((struct cgeight_softc *)dev, 1); 519 } 520 521 static int 522 cgeight_get_video(sc) 523 struct cgeight_softc *sc; 524 { 525 526 return (fb_pfour_get_video(&sc->sc_fb)); 527 } 528 529 static void 530 cgeight_set_video(sc, enable) 531 struct cgeight_softc *sc; 532 int enable; 533 { 534 535 fb_pfour_set_video(&sc->sc_fb, enable); 536 } 537 538 /* 539 * Load a subset of the current (new) colormap into the Brooktree DAC. 540 */ 541 static void 542 cgeightloadcmap(sc, start, ncolors) 543 register struct cgeight_softc *sc; 544 register int start, ncolors; 545 { 546 register volatile struct bt_regs *bt; 547 register u_int *ip; 548 register int count; 549 550 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 551 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 552 bt = &sc->sc_fbc->fbc_dac; 553 bt->bt_addr = BT_D4M4(start); 554 while (--count >= 0) 555 bt->bt_cmap = *ip++; 556 } 557 #endif 558
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