cgeight.c revision 1.16
1 /* $NetBSD: cgeight.c,v 1.16 1998/03/21 20:11:30 pk 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 bus_space_tag_t sc_bustag; 120 bus_type_t sc_btype; /* phys address description */ 121 bus_addr_t sc_paddr; /* for device mmap() */ 122 123 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 124 union bt_cmap sc_cmap; /* Brooktree color map */ 125 }; 126 127 /* autoconfiguration driver */ 128 static void cgeightattach(struct device *, struct device *, void *); 129 static int cgeightmatch(struct device *, struct cfdata *, void *); 130 #if defined(SUN4) 131 static void cgeightunblank __P((struct device *)); 132 #endif 133 134 static int cg8_pfour_probe __P((void *, void *)); 135 136 /* cdevsw prototypes */ 137 cdev_decl(cgeight); 138 139 struct cfattach cgeight_ca = { 140 sizeof(struct cgeight_softc), cgeightmatch, cgeightattach 141 }; 142 143 extern struct cfdriver cgeight_cd; 144 145 #if defined(SUN4) 146 /* frame buffer generic driver */ 147 static struct fbdriver cgeightfbdriver = { 148 cgeightunblank, cgeightopen, cgeightclose, cgeightioctl, 149 cgeightpoll, cgeightmmap 150 }; 151 152 extern int fbnode; 153 extern struct tty *fbconstty; 154 155 static void cgeightloadcmap __P((struct cgeight_softc *, int, int)); 156 static int cgeight_get_video __P((struct cgeight_softc *)); 157 static void cgeight_set_video __P((struct cgeight_softc *, int)); 158 #endif 159 160 /* 161 * Match a cgeight. 162 */ 163 int 164 cgeightmatch(parent, cf, aux) 165 struct device *parent; 166 struct cfdata *cf; 167 void *aux; 168 { 169 union obio_attach_args *uoba = aux; 170 struct obio4_attach_args *oba; 171 172 if (uoba->uoba_isobio4 == 0) 173 return (0); 174 175 oba = &uoba->uoba_oba4; 176 return (obio_bus_probe(oba->oba_bustag, oba->oba_paddr, 177 0, 4, cg8_pfour_probe, NULL)); 178 179 } 180 181 int 182 cg8_pfour_probe(vaddr, arg) 183 void *vaddr; 184 void *arg; 185 { 186 187 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24); 188 } 189 190 /* 191 * Attach a display. We need to notice if it is the console, too. 192 */ 193 void 194 cgeightattach(parent, self, aux) 195 struct device *parent, *self; 196 void *aux; 197 { 198 #if defined(SUN4) 199 union obio_attach_args *uoba = aux; 200 struct obio4_attach_args *oba = &uoba->uoba_oba4; 201 struct cgeight_softc *sc = (struct cgeight_softc *)self; 202 struct fbdevice *fb = &sc->sc_fb; 203 bus_space_handle_t bh; 204 volatile struct bt_regs *bt; 205 int ramsize, i, isconsole; 206 207 sc->sc_bustag = oba->oba_bustag; 208 sc->sc_btype = (bus_type_t)0; 209 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 210 211 /* Map the pfour register. */ 212 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 213 0, 214 sizeof(u_int32_t), 215 BUS_SPACE_MAP_LINEAR, 216 0, &bh) != 0) { 217 printf("%s: cannot map pfour register\n", self->dv_xname); 218 return; 219 } 220 fb->fb_pfour = (volatile u_int32_t *)bh; 221 222 fb->fb_driver = &cgeightfbdriver; 223 fb->fb_device = &sc->sc_dev; 224 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 225 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 226 fb->fb_flags |= FB_PFOUR; 227 228 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 229 230 fb->fb_type.fb_depth = 24; 231 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 232 233 sc->sc_fb.fb_type.fb_cmsize = 256; 234 sc->sc_fb.fb_type.fb_size = ramsize; 235 printf(": cgeight/p4, %d x %d", 236 fb->fb_type.fb_width, 237 fb->fb_type.fb_height); 238 239 isconsole = 0; 240 241 if (CPU_ISSUN4) { 242 struct eeprom *eep = (struct eeprom *)eeprom_va; 243 244 /* 245 * Assume this is the console if there's no eeprom info 246 * to be found. 247 */ 248 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 249 isconsole = (fbconstty != NULL); 250 } 251 252 #if 0 253 /* 254 * We don't do any of the console handling here. Instead, 255 * we let the bwtwo driver pick up the overlay plane and 256 * use it instead. Rconsole should have better performance 257 * with the 1-bit depth. 258 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 259 */ 260 261 /* 262 * When the ROM has mapped in a cgfour display, the address 263 * maps only the video RAM, so in any case we have to map the 264 * registers ourselves. We only need the video RAM if we are 265 * going to print characters via rconsole. 266 */ 267 268 if (isconsole) { 269 /* XXX this is kind of a waste */ 270 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 271 PFOUR_COLOR_OFF_OVERLAY, ramsize); 272 } 273 #endif 274 275 /* Map the Brooktree. */ 276 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 277 PFOUR_COLOR_OFF_CMAP, 278 sizeof(struct fbcontrol), 279 BUS_SPACE_MAP_LINEAR, 280 0, &bh) != 0) { 281 printf("%s: cannot map control registers\n", self->dv_xname); 282 return; 283 } 284 sc->sc_fbc = (volatile struct fbcontrol *)bh; 285 286 #if 0 /* XXX thorpej ??? */ 287 /* tell the enable plane to look at the mono image */ 288 memset(ca->ca_ra.ra_vaddr, 0xff, 289 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 290 #endif 291 292 /* grab initial (current) color map */ 293 bt = &sc->sc_fbc->fbc_dac; 294 bt->bt_addr = 0; 295 for (i = 0; i < 256 * 3 / 4; i++) 296 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 297 298 BT_INIT(bt, 0); 299 300 #if 0 /* see above */ 301 if (isconsole) { 302 printf(" (console)\n"); 303 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 304 fbrcons_init(fb); 305 #endif 306 } else 307 #endif /* 0 */ 308 printf("\n"); 309 310 /* 311 * Even though we're not using rconsole, we'd still like 312 * to notice if we're the console framebuffer. 313 */ 314 fb_attach(&sc->sc_fb, isconsole); 315 #endif 316 } 317 318 int 319 cgeightopen(dev, flags, mode, p) 320 dev_t dev; 321 int flags, mode; 322 struct proc *p; 323 { 324 int unit = minor(dev); 325 326 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 327 return (ENXIO); 328 return (0); 329 } 330 331 int 332 cgeightclose(dev, flags, mode, p) 333 dev_t dev; 334 int flags, mode; 335 struct proc *p; 336 { 337 338 return (0); 339 } 340 341 int 342 cgeightioctl(dev, cmd, data, flags, p) 343 dev_t dev; 344 u_long cmd; 345 register caddr_t data; 346 int flags; 347 struct proc *p; 348 { 349 #if defined(SUN4) 350 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 351 register struct fbgattr *fba; 352 int error; 353 354 switch (cmd) { 355 356 case FBIOGTYPE: 357 *(struct fbtype *)data = sc->sc_fb.fb_type; 358 break; 359 360 case FBIOGATTR: 361 fba = (struct fbgattr *)data; 362 fba->real_type = sc->sc_fb.fb_type.fb_type; 363 fba->owner = 0; /* XXX ??? */ 364 fba->fbtype = sc->sc_fb.fb_type; 365 fba->sattr.flags = 0; 366 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 367 fba->sattr.dev_specific[0] = -1; 368 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 369 fba->emu_types[1] = -1; 370 break; 371 372 case FBIOGETCMAP: 373 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 374 375 case FBIOPUTCMAP: 376 /* copy to software map */ 377 #define p ((struct fbcmap *)data) 378 error = bt_putcmap(p, &sc->sc_cmap, 256); 379 if (error) 380 return (error); 381 /* now blast them into the chip */ 382 /* XXX should use retrace interrupt */ 383 cgeightloadcmap(sc, p->index, p->count); 384 #undef p 385 break; 386 387 case FBIOGVIDEO: 388 *(int *)data = cgeight_get_video(sc); 389 break; 390 391 case FBIOSVIDEO: 392 cgeight_set_video(sc, *(int *)data); 393 break; 394 395 default: 396 return (ENOTTY); 397 } 398 #endif 399 return (0); 400 } 401 402 int 403 cgeightpoll(dev, events, p) 404 dev_t dev; 405 int events; 406 struct proc *p; 407 { 408 409 return (seltrue(dev, events, p)); 410 } 411 412 /* 413 * Return the address that would map the given device at the given 414 * offset, allowing for the given protection, or return -1 for error. 415 * 416 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 417 * enable plane for 128K, followed by the colour for as long as it 418 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 419 * register for NBPG, then the bootrom for 0x40000. 420 */ 421 int 422 cgeightmmap(dev, off, prot) 423 dev_t dev; 424 int off, prot; 425 { 426 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 427 int poff; 428 429 #define START_ENABLE (128*1024) 430 #define START_COLOR ((128*1024) + (128*1024)) 431 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 432 sc->sc_fb.fb_type.fb_height * 3) 433 #define END_COLOR (START_COLOR + COLOR_SIZE) 434 #define START_SPECIAL 0x800000 435 #define PROMSIZE 0x40000 436 #define NOOVERLAY (0x04000000) 437 438 if (off & PGOFSET) 439 panic("cgeightmap"); 440 441 if ((u_int)off >= NOOVERLAY) { 442 off -= NOOVERLAY; 443 444 /* 445 * X11 maps a huge chunk of the frame buffer; far more than 446 * there really is. We compensate by double-mapping the 447 * first page for as many other pages as it wants 448 */ 449 while (off >= COLOR_SIZE) 450 off -= COLOR_SIZE; /* XXX thorpej ??? */ 451 452 poff = off + PFOUR_COLOR_OFF_COLOR; 453 } else if ((u_int)off < START_ENABLE) { 454 /* 455 * in overlay plane 456 */ 457 poff = PFOUR_COLOR_OFF_OVERLAY + off; 458 } else if ((u_int)off < START_COLOR) { 459 /* 460 * in enable plane 461 */ 462 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 463 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 464 /* 465 * in colour plane 466 */ 467 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 468 } else if ((u_int)off < START_SPECIAL) { 469 /* 470 * hole 471 */ 472 poff = 0; /* XXX */ 473 } else if ((u_int)off == START_SPECIAL) { 474 /* 475 * colour map (Brooktree) 476 */ 477 poff = PFOUR_COLOR_OFF_CMAP; 478 } else if ((u_int)off == START_SPECIAL + NBPG) { 479 /* 480 * p4 register 481 */ 482 poff = 0; 483 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 484 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 485 /* 486 * rom 487 */ 488 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 489 } else 490 return (-1); 491 492 return (bus_space_mmap (sc->sc_bustag, 493 sc->sc_btype, 494 sc->sc_paddr + poff, 495 BUS_SPACE_MAP_LINEAR)); 496 } 497 498 #if defined(SUN4) 499 /* 500 * Undo the effect of an FBIOSVIDEO that turns the video off. 501 */ 502 static void 503 cgeightunblank(dev) 504 struct device *dev; 505 { 506 507 cgeight_set_video((struct cgeight_softc *)dev, 1); 508 } 509 510 static int 511 cgeight_get_video(sc) 512 struct cgeight_softc *sc; 513 { 514 515 return (fb_pfour_get_video(&sc->sc_fb)); 516 } 517 518 static void 519 cgeight_set_video(sc, enable) 520 struct cgeight_softc *sc; 521 int enable; 522 { 523 524 fb_pfour_set_video(&sc->sc_fb, enable); 525 } 526 527 /* 528 * Load a subset of the current (new) colormap into the Brooktree DAC. 529 */ 530 static void 531 cgeightloadcmap(sc, start, ncolors) 532 register struct cgeight_softc *sc; 533 register int start, ncolors; 534 { 535 register volatile struct bt_regs *bt; 536 register u_int *ip; 537 register int count; 538 539 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 540 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 541 bt = &sc->sc_fbc->fbc_dac; 542 bt->bt_addr = BT_D4M4(start); 543 while (--count >= 0) 544 bt->bt_cmap = *ip++; 545 } 546 #endif 547
Indexes created Mon Sep 29 21:09:56 GMT 2025