cgeight.c revision 1.20
1 /* $NetBSD: cgeight.c,v 1.20 2000/03/19 15:38:45 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 static void cgeightloadcmap __P((struct cgeight_softc *, int, int)); 153 static int cgeight_get_video __P((struct cgeight_softc *)); 154 static void cgeight_set_video __P((struct cgeight_softc *, int)); 155 #endif 156 157 /* 158 * Match a cgeight. 159 */ 160 int 161 cgeightmatch(parent, cf, aux) 162 struct device *parent; 163 struct cfdata *cf; 164 void *aux; 165 { 166 union obio_attach_args *uoba = aux; 167 struct obio4_attach_args *oba; 168 169 if (uoba->uoba_isobio4 == 0) 170 return (0); 171 172 oba = &uoba->uoba_oba4; 173 return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr, 174 4, /* probe size */ 175 0, /* offset */ 176 0, /* flags */ 177 cg8_pfour_probe, NULL)); 178 } 179 180 int 181 cg8_pfour_probe(vaddr, arg) 182 void *vaddr; 183 void *arg; 184 { 185 186 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24); 187 } 188 189 /* 190 * Attach a display. We need to notice if it is the console, too. 191 */ 192 void 193 cgeightattach(parent, self, aux) 194 struct device *parent, *self; 195 void *aux; 196 { 197 #if defined(SUN4) 198 union obio_attach_args *uoba = aux; 199 struct obio4_attach_args *oba = &uoba->uoba_oba4; 200 struct cgeight_softc *sc = (struct cgeight_softc *)self; 201 struct fbdevice *fb = &sc->sc_fb; 202 bus_space_handle_t bh; 203 volatile struct bt_regs *bt; 204 int ramsize, i, isconsole; 205 206 sc->sc_bustag = oba->oba_bustag; 207 sc->sc_btype = (bus_type_t)0; 208 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 209 210 /* Map the pfour register. */ 211 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 212 0, 213 sizeof(u_int32_t), 214 BUS_SPACE_MAP_LINEAR, 215 0, &bh) != 0) { 216 printf("%s: cannot map pfour register\n", self->dv_xname); 217 return; 218 } 219 fb->fb_pfour = (volatile u_int32_t *)bh; 220 221 fb->fb_driver = &cgeightfbdriver; 222 fb->fb_device = &sc->sc_dev; 223 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 224 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 225 fb->fb_flags |= FB_PFOUR; 226 227 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 228 229 fb->fb_type.fb_depth = 24; 230 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 231 232 sc->sc_fb.fb_type.fb_cmsize = 256; 233 sc->sc_fb.fb_type.fb_size = ramsize; 234 printf(": cgeight/p4, %d x %d", 235 fb->fb_type.fb_width, 236 fb->fb_type.fb_height); 237 238 isconsole = 0; 239 240 if (CPU_ISSUN4) { 241 struct eeprom *eep = (struct eeprom *)eeprom_va; 242 243 /* 244 * Assume this is the console if there's no eeprom info 245 * to be found. 246 */ 247 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 248 isconsole = fb_is_console(0); 249 } 250 251 #if 0 252 /* 253 * We don't do any of the console handling here. Instead, 254 * we let the bwtwo driver pick up the overlay plane and 255 * use it instead. Rconsole should have better performance 256 * with the 1-bit depth. 257 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 258 */ 259 260 /* 261 * When the ROM has mapped in a cgfour display, the address 262 * maps only the video RAM, so in any case we have to map the 263 * registers ourselves. We only need the video RAM if we are 264 * going to print characters via rconsole. 265 */ 266 267 if (isconsole) { 268 /* XXX this is kind of a waste */ 269 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 270 PFOUR_COLOR_OFF_OVERLAY, ramsize); 271 } 272 #endif 273 274 /* Map the Brooktree. */ 275 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 276 PFOUR_COLOR_OFF_CMAP, 277 sizeof(struct fbcontrol), 278 BUS_SPACE_MAP_LINEAR, 279 0, &bh) != 0) { 280 printf("%s: cannot map control registers\n", self->dv_xname); 281 return; 282 } 283 sc->sc_fbc = (volatile struct fbcontrol *)bh; 284 285 #if 0 /* XXX thorpej ??? */ 286 /* tell the enable plane to look at the mono image */ 287 memset(ca->ca_ra.ra_vaddr, 0xff, 288 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 289 #endif 290 291 /* grab initial (current) color map */ 292 bt = &sc->sc_fbc->fbc_dac; 293 bt->bt_addr = 0; 294 for (i = 0; i < 256 * 3 / 4; i++) 295 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 296 297 BT_INIT(bt, 0); 298 299 #if 0 /* see above */ 300 if (isconsole) { 301 printf(" (console)\n"); 302 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 303 fbrcons_init(fb); 304 #endif 305 } else 306 #endif /* 0 */ 307 printf("\n"); 308 309 /* 310 * Even though we're not using rconsole, we'd still like 311 * to notice if we're the console framebuffer. 312 */ 313 fb_attach(&sc->sc_fb, isconsole); 314 #endif 315 } 316 317 int 318 cgeightopen(dev, flags, mode, p) 319 dev_t dev; 320 int flags, mode; 321 struct proc *p; 322 { 323 int unit = minor(dev); 324 325 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 326 return (ENXIO); 327 return (0); 328 } 329 330 int 331 cgeightclose(dev, flags, mode, p) 332 dev_t dev; 333 int flags, mode; 334 struct proc *p; 335 { 336 337 return (0); 338 } 339 340 int 341 cgeightioctl(dev, cmd, data, flags, p) 342 dev_t dev; 343 u_long cmd; 344 caddr_t data; 345 int flags; 346 struct proc *p; 347 { 348 #if defined(SUN4) 349 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 350 struct fbgattr *fba; 351 int error; 352 353 switch (cmd) { 354 355 case FBIOGTYPE: 356 *(struct fbtype *)data = sc->sc_fb.fb_type; 357 break; 358 359 case FBIOGATTR: 360 fba = (struct fbgattr *)data; 361 fba->real_type = sc->sc_fb.fb_type.fb_type; 362 fba->owner = 0; /* XXX ??? */ 363 fba->fbtype = sc->sc_fb.fb_type; 364 fba->sattr.flags = 0; 365 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 366 fba->sattr.dev_specific[0] = -1; 367 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 368 fba->emu_types[1] = -1; 369 break; 370 371 case FBIOGETCMAP: 372 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 373 374 case FBIOPUTCMAP: 375 /* copy to software map */ 376 #define p ((struct fbcmap *)data) 377 error = bt_putcmap(p, &sc->sc_cmap, 256); 378 if (error) 379 return (error); 380 /* now blast them into the chip */ 381 /* XXX should use retrace interrupt */ 382 cgeightloadcmap(sc, p->index, p->count); 383 #undef p 384 break; 385 386 case FBIOGVIDEO: 387 *(int *)data = cgeight_get_video(sc); 388 break; 389 390 case FBIOSVIDEO: 391 cgeight_set_video(sc, *(int *)data); 392 break; 393 394 default: 395 return (ENOTTY); 396 } 397 #endif 398 return (0); 399 } 400 401 int 402 cgeightpoll(dev, events, p) 403 dev_t dev; 404 int events; 405 struct proc *p; 406 { 407 408 return (seltrue(dev, events, p)); 409 } 410 411 /* 412 * Return the address that would map the given device at the given 413 * offset, allowing for the given protection, or return -1 for error. 414 * 415 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 416 * enable plane for 128K, followed by the colour for as long as it 417 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 418 * register for NBPG, then the bootrom for 0x40000. 419 */ 420 int 421 cgeightmmap(dev, off, prot) 422 dev_t dev; 423 int off, prot; 424 { 425 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 426 bus_space_handle_t bh; 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 (off < 0) 442 return (-1); 443 else if ((u_int)off >= NOOVERLAY) { 444 off -= NOOVERLAY; 445 446 /* 447 * X11 maps a huge chunk of the frame buffer; far more than 448 * there really is. We compensate by double-mapping the 449 * first page for as many other pages as it wants 450 */ 451 while ((u_int)off >= COLOR_SIZE) 452 off -= COLOR_SIZE; /* XXX thorpej ??? */ 453 454 poff = off + PFOUR_COLOR_OFF_COLOR; 455 } else if ((u_int)off < START_ENABLE) { 456 /* 457 * in overlay plane 458 */ 459 poff = PFOUR_COLOR_OFF_OVERLAY + off; 460 } else if ((u_int)off < START_COLOR) { 461 /* 462 * in enable plane 463 */ 464 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 465 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 466 /* 467 * in colour plane 468 */ 469 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 470 } else if ((u_int)off < START_SPECIAL) { 471 /* 472 * hole 473 */ 474 poff = 0; /* XXX */ 475 } else if ((u_int)off == START_SPECIAL) { 476 /* 477 * colour map (Brooktree) 478 */ 479 poff = PFOUR_COLOR_OFF_CMAP; 480 } else if ((u_int)off == START_SPECIAL + NBPG) { 481 /* 482 * p4 register 483 */ 484 poff = 0; 485 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 486 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 487 /* 488 * rom 489 */ 490 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 491 } else 492 return (-1); 493 494 if (bus_space_mmap(sc->sc_bustag, 495 sc->sc_btype, 496 sc->sc_paddr + poff, 497 BUS_SPACE_MAP_LINEAR, &bh)) 498 return (-1); 499 500 return ((int)bh); 501 } 502 503 #if defined(SUN4) 504 /* 505 * Undo the effect of an FBIOSVIDEO that turns the video off. 506 */ 507 static void 508 cgeightunblank(dev) 509 struct device *dev; 510 { 511 512 cgeight_set_video((struct cgeight_softc *)dev, 1); 513 } 514 515 static int 516 cgeight_get_video(sc) 517 struct cgeight_softc *sc; 518 { 519 520 return (fb_pfour_get_video(&sc->sc_fb)); 521 } 522 523 static void 524 cgeight_set_video(sc, enable) 525 struct cgeight_softc *sc; 526 int enable; 527 { 528 529 fb_pfour_set_video(&sc->sc_fb, enable); 530 } 531 532 /* 533 * Load a subset of the current (new) colormap into the Brooktree DAC. 534 */ 535 static void 536 cgeightloadcmap(sc, start, ncolors) 537 register struct cgeight_softc *sc; 538 register int start, ncolors; 539 { 540 volatile struct bt_regs *bt; 541 u_int *ip; 542 int count; 543 544 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 545 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 546 bt = &sc->sc_fbc->fbc_dac; 547 bt->bt_addr = BT_D4M4(start); 548 while (--count >= 0) 549 bt->bt_cmap = *ip++; 550 } 551 #endif 552
Indexes created Mon Sep 29 21:09:56 GMT 2025