cgeight.c revision 1.31
1 /* $NetBSD: cgeight.c,v 1.31 2002/10/23 09:12:05 jdolecek 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> 101 102 103 #include <machine/autoconf.h> 104 #include <machine/eeprom.h> 105 106 #include <dev/sun/fbio.h> 107 #include <dev/sun/fbvar.h> 108 #include <dev/sun/btreg.h> 109 #include <dev/sun/btvar.h> 110 #include <dev/sun/pfourreg.h> 111 112 /* per-display variables */ 113 struct cgeight_softc { 114 struct device sc_dev; /* base device */ 115 struct fbdevice sc_fb; /* frame buffer device */ 116 bus_space_tag_t sc_bustag; 117 bus_addr_t sc_paddr; /* phys address for device mmap() */ 118 119 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 120 union bt_cmap sc_cmap; /* Brooktree color map */ 121 }; 122 123 /* autoconfiguration driver */ 124 static void cgeightattach(struct device *, struct device *, void *); 125 static int cgeightmatch(struct device *, struct cfdata *, void *); 126 #if defined(SUN4) 127 static void cgeightunblank __P((struct device *)); 128 #endif 129 130 static int cg8_pfour_probe __P((void *, void *)); 131 132 CFATTACH_DECL(cgeight, sizeof(struct cgeight_softc), 133 cgeightmatch, cgeightattach, NULL, NULL); 134 135 extern struct cfdriver cgeight_cd; 136 137 dev_type_open(cgeightopen); 138 dev_type_ioctl(cgeightioctl); 139 dev_type_mmap(cgeightmmap); 140 141 const struct cdevsw cgeight_cdevsw = { 142 cgeightopen, nullclose, noread, nowrite, cgeightioctl, 143 nostop, notty, nopoll, cgeightmmap, nokqfilter 144 }; 145 146 #if defined(SUN4) 147 /* frame buffer generic driver */ 148 static struct fbdriver cgeightfbdriver = { 149 cgeightunblank, cgeightopen, nullclose, cgeightioctl, 150 nopoll, cgeightmmap, nokqfilter 151 }; 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 union obio_attach_args *uoba = aux; 168 struct obio4_attach_args *oba; 169 170 if (uoba->uoba_isobio4 == 0) 171 return (0); 172 173 oba = &uoba->uoba_oba4; 174 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 175 4, /* probe size */ 176 0, /* offset */ 177 0, /* flags */ 178 cg8_pfour_probe, NULL)); 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_paddr = (bus_addr_t)oba->oba_paddr; 209 210 /* Map the pfour register. */ 211 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 212 sizeof(u_int32_t), 213 BUS_SPACE_MAP_LINEAR, 214 &bh) != 0) { 215 printf("%s: cannot map pfour register\n", self->dv_xname); 216 return; 217 } 218 fb->fb_pfour = (volatile u_int32_t *)bh; 219 220 fb->fb_driver = &cgeightfbdriver; 221 fb->fb_device = &sc->sc_dev; 222 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 223 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 224 fb->fb_flags |= FB_PFOUR; 225 226 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 227 228 fb->fb_type.fb_depth = 24; 229 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 230 231 sc->sc_fb.fb_type.fb_cmsize = 256; 232 sc->sc_fb.fb_type.fb_size = ramsize; 233 printf(": cgeight/p4, %d x %d", 234 fb->fb_type.fb_width, 235 fb->fb_type.fb_height); 236 237 isconsole = 0; 238 239 if (CPU_ISSUN4) { 240 struct eeprom *eep = (struct eeprom *)eeprom_va; 241 242 /* 243 * Assume this is the console if there's no eeprom info 244 * to be found. 245 */ 246 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 247 isconsole = fb_is_console(0); 248 } 249 250 #if 0 251 /* 252 * We don't do any of the console handling here. Instead, 253 * we let the bwtwo driver pick up the overlay plane and 254 * use it instead. Rconsole should have better performance 255 * with the 1-bit depth. 256 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 257 */ 258 259 /* 260 * When the ROM has mapped in a cgfour display, the address 261 * maps only the video RAM, so in any case we have to map the 262 * registers ourselves. We only need the video RAM if we are 263 * going to print characters via rconsole. 264 */ 265 266 if (isconsole) { 267 /* XXX this is kind of a waste */ 268 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 269 PFOUR_COLOR_OFF_OVERLAY, ramsize); 270 } 271 #endif 272 273 /* Map the Brooktree. */ 274 if (bus_space_map(oba->oba_bustag, 275 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 276 sizeof(struct fbcontrol), 277 BUS_SPACE_MAP_LINEAR, 278 &bh) != 0) { 279 printf("%s: cannot map control registers\n", self->dv_xname); 280 return; 281 } 282 sc->sc_fbc = (volatile struct fbcontrol *)bh; 283 284 #if 0 /* XXX thorpej ??? */ 285 /* tell the enable plane to look at the mono image */ 286 memset(ca->ca_ra.ra_vaddr, 0xff, 287 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 288 #endif 289 290 /* grab initial (current) color map */ 291 bt = &sc->sc_fbc->fbc_dac; 292 bt->bt_addr = 0; 293 for (i = 0; i < 256 * 3 / 4; i++) 294 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 295 296 BT_INIT(bt, 0); 297 298 #if 0 /* see above */ 299 if (isconsole) { 300 printf(" (console)\n"); 301 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 302 fbrcons_init(fb); 303 #endif 304 } else 305 #endif /* 0 */ 306 printf("\n"); 307 308 /* 309 * Even though we're not using rconsole, we'd still like 310 * to notice if we're the console framebuffer. 311 */ 312 fb_attach(&sc->sc_fb, isconsole); 313 #endif 314 } 315 316 int 317 cgeightopen(dev, flags, mode, p) 318 dev_t dev; 319 int flags, mode; 320 struct proc *p; 321 { 322 int unit = minor(dev); 323 324 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 325 return (ENXIO); 326 return (0); 327 } 328 329 int 330 cgeightioctl(dev, cmd, data, flags, p) 331 dev_t dev; 332 u_long cmd; 333 caddr_t data; 334 int flags; 335 struct proc *p; 336 { 337 #if defined(SUN4) 338 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 339 struct fbgattr *fba; 340 int error; 341 342 switch (cmd) { 343 344 case FBIOGTYPE: 345 *(struct fbtype *)data = sc->sc_fb.fb_type; 346 break; 347 348 case FBIOGATTR: 349 fba = (struct fbgattr *)data; 350 fba->real_type = sc->sc_fb.fb_type.fb_type; 351 fba->owner = 0; /* XXX ??? */ 352 fba->fbtype = sc->sc_fb.fb_type; 353 fba->sattr.flags = 0; 354 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 355 fba->sattr.dev_specific[0] = -1; 356 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 357 fba->emu_types[1] = -1; 358 break; 359 360 case FBIOGETCMAP: 361 #define p ((struct fbcmap *)data) 362 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 363 364 case FBIOPUTCMAP: 365 /* copy to software map */ 366 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 367 if (error) 368 return (error); 369 /* now blast them into the chip */ 370 /* XXX should use retrace interrupt */ 371 cgeightloadcmap(sc, p->index, p->count); 372 #undef p 373 break; 374 375 case FBIOGVIDEO: 376 *(int *)data = cgeight_get_video(sc); 377 break; 378 379 case FBIOSVIDEO: 380 cgeight_set_video(sc, *(int *)data); 381 break; 382 383 default: 384 return (ENOTTY); 385 } 386 #endif 387 return (0); 388 } 389 390 /* 391 * Return the address that would map the given device at the given 392 * offset, allowing for the given protection, or return -1 for error. 393 * 394 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 395 * enable plane for 128K, followed by the colour for as long as it 396 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 397 * register for NBPG, then the bootrom for 0x40000. 398 */ 399 paddr_t 400 cgeightmmap(dev, off, prot) 401 dev_t dev; 402 off_t off; 403 int prot; 404 { 405 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 406 off_t poff; 407 408 #define START_ENABLE (128*1024) 409 #define START_COLOR ((128*1024) + (128*1024)) 410 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 411 sc->sc_fb.fb_type.fb_height * 3) 412 #define END_COLOR (START_COLOR + COLOR_SIZE) 413 #define START_SPECIAL 0x800000 414 #define PROMSIZE 0x40000 415 #define NOOVERLAY (0x04000000) 416 417 if (off & PGOFSET) 418 panic("cgeightmap"); 419 420 if (off < 0) 421 return (-1); 422 else if ((u_int)off >= NOOVERLAY) { 423 off -= NOOVERLAY; 424 425 /* 426 * X11 maps a huge chunk of the frame buffer; far more than 427 * there really is. We compensate by double-mapping the 428 * first page for as many other pages as it wants 429 */ 430 while ((u_int)off >= COLOR_SIZE) 431 off -= COLOR_SIZE; /* XXX thorpej ??? */ 432 433 poff = off + PFOUR_COLOR_OFF_COLOR; 434 } else if ((u_int)off < START_ENABLE) { 435 /* 436 * in overlay plane 437 */ 438 poff = PFOUR_COLOR_OFF_OVERLAY + off; 439 } else if ((u_int)off < START_COLOR) { 440 /* 441 * in enable plane 442 */ 443 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 444 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 445 /* 446 * in colour plane 447 */ 448 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 449 } else if ((u_int)off < START_SPECIAL) { 450 /* 451 * hole 452 */ 453 poff = 0; /* XXX */ 454 } else if ((u_int)off == START_SPECIAL) { 455 /* 456 * colour map (Brooktree) 457 */ 458 poff = PFOUR_COLOR_OFF_CMAP; 459 } else if ((u_int)off == START_SPECIAL + NBPG) { 460 /* 461 * p4 register 462 */ 463 poff = 0; 464 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 465 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 466 /* 467 * rom 468 */ 469 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 470 } else 471 return (-1); 472 473 return (bus_space_mmap(sc->sc_bustag, 474 sc->sc_paddr, poff, 475 prot, BUS_SPACE_MAP_LINEAR)); 476 } 477 478 #if defined(SUN4) 479 /* 480 * Undo the effect of an FBIOSVIDEO that turns the video off. 481 */ 482 static void 483 cgeightunblank(dev) 484 struct device *dev; 485 { 486 487 cgeight_set_video((struct cgeight_softc *)dev, 1); 488 } 489 490 static int 491 cgeight_get_video(sc) 492 struct cgeight_softc *sc; 493 { 494 495 return (fb_pfour_get_video(&sc->sc_fb)); 496 } 497 498 static void 499 cgeight_set_video(sc, enable) 500 struct cgeight_softc *sc; 501 int enable; 502 { 503 504 fb_pfour_set_video(&sc->sc_fb, enable); 505 } 506 507 /* 508 * Load a subset of the current (new) colormap into the Brooktree DAC. 509 */ 510 static void 511 cgeightloadcmap(sc, start, ncolors) 512 register struct cgeight_softc *sc; 513 register int start, ncolors; 514 { 515 volatile struct bt_regs *bt; 516 u_int *ip; 517 int count; 518 519 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 520 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 521 bt = &sc->sc_fbc->fbc_dac; 522 bt->bt_addr = BT_D4M4(start); 523 while (--count >= 0) 524 bt->bt_cmap = *ip++; 525 } 526 #endif 527
Indexes created Mon Sep 29 21:09:56 GMT 2025