1 /* $NetBSD: cgeight.c,v 1.13 1997/05/24 20:16:04 pk Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Jason R. Thorpe. All rights reserved. 5 * Copyright (c) 1995 Theo de Raadt 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This software was developed by the Computer Systems Engineering group 10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 11 * contributed to Berkeley. 12 * 13 * All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Lawrence Berkeley Laboratory. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. All advertising materials mentioning features or use of this software 27 * must display the following acknowledgement: 28 * This product includes software developed by the University of 29 * California, Berkeley and its contributors. 30 * 4. Neither the name of the University nor the names of its contributors 31 * may be used to endorse or promote products derived from this software 32 * without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 * 46 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 47 */ 48 49 /* 50 * color display (cgeight) driver. 51 * 52 * Does not handle interrupts, even though they can occur. 53 * 54 * XXX should defer colormap updates to vertical retrace interrupts 55 */ 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/buf.h> 60 #include <sys/device.h> 61 #include <sys/ioctl.h> 62 #include <sys/malloc.h> 63 #include <sys/mman.h> 64 #include <sys/tty.h> 65 #include <sys/conf.h> 66 67 #include <vm/vm.h> 68 69 #include <machine/fbio.h> 70 #include <machine/autoconf.h> 71 #include <machine/pmap.h> 72 #include <machine/fbvar.h> 73 #include <machine/eeprom.h> 74 #include <machine/conf.h> 75 76 #include <sparc/dev/btreg.h> 77 #include <sparc/dev/btvar.h> 78 #include <sparc/dev/pfourreg.h> 79 80 /* per-display variables */ 81 struct cgeight_softc { 82 struct device sc_dev; /* base device */ 83 struct fbdevice sc_fb; /* frame buffer device */ 84 struct rom_reg sc_phys; /* display RAM (phys addr) */ 85 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 86 int sc_bustype; /* type of bus we live on */ 87 union bt_cmap sc_cmap; /* Brooktree color map */ 88 }; 89 90 /* autoconfiguration driver */ 91 static void cgeightattach(struct device *, struct device *, void *); 92 static int cgeightmatch(struct device *, struct cfdata *, void *); 93 #if defined(SUN4) 94 static void cgeightunblank __P((struct device *)); 95 #endif 96 97 /* cdevsw prototypes */ 98 cdev_decl(cgeight); 99 100 struct cfattach cgeight_ca = { 101 sizeof(struct cgeight_softc), cgeightmatch, cgeightattach 102 }; 103 104 struct cfdriver cgeight_cd = { 105 NULL, "cgeight", DV_DULL 106 }; 107 108 #if defined(SUN4) 109 /* frame buffer generic driver */ 110 static struct fbdriver cgeightfbdriver = { 111 cgeightunblank, cgeightopen, cgeightclose, cgeightioctl, 112 cgeightpoll, cgeightmmap 113 }; 114 115 extern int fbnode; 116 extern struct tty *fbconstty; 117 118 static void cgeightloadcmap __P((struct cgeight_softc *, int, int)); 119 static int cgeight_get_video __P((struct cgeight_softc *)); 120 static void cgeight_set_video __P((struct cgeight_softc *, int)); 121 #endif 122 123 /* 124 * Match a cgeight. 125 */ 126 int 127 cgeightmatch(parent, cf, aux) 128 struct device *parent; 129 struct cfdata *cf; 130 void *aux; 131 { 132 struct confargs *ca = aux; 133 struct romaux *ra = &ca->ca_ra; 134 135 if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) 136 return (0); 137 138 /* 139 * Mask out invalid flags from the user. 140 */ 141 cf->cf_flags &= FB_USERMASK; 142 143 /* 144 * Only exists on a sun4. 145 */ 146 if (!CPU_ISSUN4) 147 return (0); 148 149 /* 150 * Only exists on obio. 151 */ 152 if (ca->ca_bustype != BUS_OBIO) 153 return (0); 154 155 /* 156 * Make sure there's hardware there. 157 */ 158 if (probeget(ra->ra_vaddr, 4) == -1) 159 return (0); 160 161 #if defined(SUN4) 162 /* 163 * Check the pfour register. 164 */ 165 if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR24) { 166 cf->cf_flags |= FB_PFOUR; 167 return (1); 168 } 169 #endif 170 171 return (0); 172 } 173 174 /* 175 * Attach a display. We need to notice if it is the console, too. 176 */ 177 void 178 cgeightattach(parent, self, args) 179 struct device *parent, *self; 180 void *args; 181 { 182 #if defined(SUN4) 183 register struct cgeight_softc *sc = (struct cgeight_softc *)self; 184 register struct confargs *ca = args; 185 register int node = 0, ramsize, i; 186 register volatile struct bt_regs *bt; 187 struct fbdevice *fb = &sc->sc_fb; 188 int isconsole; 189 190 fb->fb_driver = &cgeightfbdriver; 191 fb->fb_device = &sc->sc_dev; 192 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 193 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 194 195 /* 196 * Only pfour cgfours, thank you... 197 */ 198 if ((ca->ca_bustype != BUS_OBIO) || 199 ((fb->fb_flags & FB_PFOUR) == 0)) { 200 printf("%s: ignoring; not a pfour\n", sc->sc_dev.dv_xname); 201 return; 202 } 203 204 /* Map the pfour register. */ 205 fb->fb_pfour = (volatile u_int32_t *) 206 mapiodev(ca->ca_ra.ra_reg, 0, sizeof(u_int32_t)); 207 208 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 209 210 fb->fb_type.fb_depth = 24; 211 fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); 212 213 sc->sc_fb.fb_type.fb_cmsize = 256; 214 sc->sc_fb.fb_type.fb_size = ramsize; 215 printf(": cgeight/p4, %d x %d", fb->fb_type.fb_width, 216 fb->fb_type.fb_height); 217 218 isconsole = 0; 219 220 if (cputyp == CPU_SUN4) { 221 struct eeprom *eep = (struct eeprom *)eeprom_va; 222 223 /* 224 * Assume this is the console if there's no eeprom info 225 * to be found. 226 */ 227 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 228 isconsole = (fbconstty != NULL); 229 } 230 231 #if 0 232 /* 233 * We don't do any of the console handling here. Instead, 234 * we let the bwtwo driver pick up the overlay plane and 235 * use it instead. Rconsole should have better performance 236 * with the 1-bit depth. 237 * -- Jason R. Thorpe <thorpej@NetBSD.ORG> 238 */ 239 240 /* 241 * When the ROM has mapped in a cgfour display, the address 242 * maps only the video RAM, so in any case we have to map the 243 * registers ourselves. We only need the video RAM if we are 244 * going to print characters via rconsole. 245 */ 246 247 if (isconsole) { 248 /* XXX this is kind of a waste */ 249 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 250 PFOUR_COLOR_OFF_OVERLAY, ramsize); 251 } 252 #endif 253 254 /* Map the Brooktree. */ 255 sc->sc_fbc = (volatile struct fbcontrol *) 256 mapiodev(ca->ca_ra.ra_reg, 257 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol)); 258 259 sc->sc_phys = ca->ca_ra.ra_reg[0]; 260 sc->sc_bustype = ca->ca_bustype; 261 262 #if 0 /* XXX thorpej ??? */ 263 /* tell the enable plane to look at the mono image */ 264 memset(ca->ca_ra.ra_vaddr, 0xff, 265 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 266 #endif 267 268 /* grab initial (current) color map */ 269 bt = &sc->sc_fbc->fbc_dac; 270 bt->bt_addr = 0; 271 for (i = 0; i < 256 * 3 / 4; i++) 272 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 273 274 BT_INIT(bt, 0); 275 276 #if 0 /* see above */ 277 if (isconsole) { 278 printf(" (console)\n"); 279 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 280 fbrcons_init(fb); 281 #endif 282 } else 283 #endif /* 0 */ 284 printf("\n"); 285 286 /* 287 * Even though we're not using rconsole, we'd still like 288 * to notice if we're the console framebuffer. 289 */ 290 fb_attach(&sc->sc_fb, isconsole); 291 #endif 292 } 293 294 int 295 cgeightopen(dev, flags, mode, p) 296 dev_t dev; 297 int flags, mode; 298 struct proc *p; 299 { 300 int unit = minor(dev); 301 302 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 303 return (ENXIO); 304 return (0); 305 } 306 307 int 308 cgeightclose(dev, flags, mode, p) 309 dev_t dev; 310 int flags, mode; 311 struct proc *p; 312 { 313 314 return (0); 315 } 316 317 int 318 cgeightioctl(dev, cmd, data, flags, p) 319 dev_t dev; 320 u_long cmd; 321 register caddr_t data; 322 int flags; 323 struct proc *p; 324 { 325 #if defined(SUN4) 326 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 327 register struct fbgattr *fba; 328 int error; 329 330 switch (cmd) { 331 332 case FBIOGTYPE: 333 *(struct fbtype *)data = sc->sc_fb.fb_type; 334 break; 335 336 case FBIOGATTR: 337 fba = (struct fbgattr *)data; 338 fba->real_type = sc->sc_fb.fb_type.fb_type; 339 fba->owner = 0; /* XXX ??? */ 340 fba->fbtype = sc->sc_fb.fb_type; 341 fba->sattr.flags = 0; 342 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 343 fba->sattr.dev_specific[0] = -1; 344 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 345 fba->emu_types[1] = -1; 346 break; 347 348 case FBIOGETCMAP: 349 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 350 351 case FBIOPUTCMAP: 352 /* copy to software map */ 353 #define p ((struct fbcmap *)data) 354 error = bt_putcmap(p, &sc->sc_cmap, 256); 355 if (error) 356 return (error); 357 /* now blast them into the chip */ 358 /* XXX should use retrace interrupt */ 359 cgeightloadcmap(sc, p->index, p->count); 360 #undef p 361 break; 362 363 case FBIOGVIDEO: 364 *(int *)data = cgeight_get_video(sc); 365 break; 366 367 case FBIOSVIDEO: 368 cgeight_set_video(sc, *(int *)data); 369 break; 370 371 default: 372 return (ENOTTY); 373 } 374 #endif 375 return (0); 376 } 377 378 int 379 cgeightpoll(dev, events, p) 380 dev_t dev; 381 int events; 382 struct proc *p; 383 { 384 385 return (seltrue(dev, events, p)); 386 } 387 388 /* 389 * Return the address that would map the given device at the given 390 * offset, allowing for the given protection, or return -1 for error. 391 * 392 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 393 * enable plane for 128K, followed by the colour for as long as it 394 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 395 * register for NBPG, then the bootrom for 0x40000. 396 */ 397 int 398 cgeightmmap(dev, off, prot) 399 dev_t dev; 400 int off, prot; 401 { 402 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 403 int poff; 404 405 #define START_ENABLE (128*1024) 406 #define START_COLOR ((128*1024) + (128*1024)) 407 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 408 sc->sc_fb.fb_type.fb_height * 3) 409 #define END_COLOR (START_COLOR + COLOR_SIZE) 410 #define START_SPECIAL 0x800000 411 #define PROMSIZE 0x40000 412 #define NOOVERLAY (0x04000000) 413 414 if (off & PGOFSET) 415 panic("cgeightmap"); 416 417 if ((u_int)off >= NOOVERLAY) { 418 off -= NOOVERLAY; 419 420 /* 421 * X11 maps a huge chunk of the frame buffer; far more than 422 * there really is. We compensate by double-mapping the 423 * first page for as many other pages as it wants 424 */ 425 while (off >= COLOR_SIZE) 426 off -= COLOR_SIZE; /* XXX thorpej ??? */ 427 428 poff = off + PFOUR_COLOR_OFF_COLOR; 429 } else if ((u_int)off < START_ENABLE) { 430 /* 431 * in overlay plane 432 */ 433 poff = PFOUR_COLOR_OFF_OVERLAY + off; 434 } else if ((u_int)off < START_COLOR) { 435 /* 436 * in enable plane 437 */ 438 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 439 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 440 /* 441 * in colour plane 442 */ 443 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 444 } else if ((u_int)off < START_SPECIAL) { 445 /* 446 * hole 447 */ 448 poff = 0; /* XXX */ 449 } else if ((u_int)off == START_SPECIAL) { 450 /* 451 * colour map (Brooktree) 452 */ 453 poff = PFOUR_COLOR_OFF_CMAP; 454 } else if ((u_int)off == START_SPECIAL + NBPG) { 455 /* 456 * p4 register 457 */ 458 poff = 0; 459 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 460 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 461 /* 462 * rom 463 */ 464 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 465 } else 466 return (-1); 467 /* 468 * I turned on PMAP_NC here to disable the cache as I was 469 * getting horribly broken behaviour with it on. 470 */ 471 return (REG2PHYS(&sc->sc_phys, poff) | PMAP_NC); 472 } 473 474 #if defined(SUN4) 475 /* 476 * Undo the effect of an FBIOSVIDEO that turns the video off. 477 */ 478 static void 479 cgeightunblank(dev) 480 struct device *dev; 481 { 482 483 cgeight_set_video((struct cgeight_softc *)dev, 1); 484 } 485 486 static int 487 cgeight_get_video(sc) 488 struct cgeight_softc *sc; 489 { 490 491 return (fb_pfour_get_video(&sc->sc_fb)); 492 } 493 494 static void 495 cgeight_set_video(sc, enable) 496 struct cgeight_softc *sc; 497 int enable; 498 { 499 500 fb_pfour_set_video(&sc->sc_fb, enable); 501 } 502 503 /* 504 * Load a subset of the current (new) colormap into the Brooktree DAC. 505 */ 506 static void 507 cgeightloadcmap(sc, start, ncolors) 508 register struct cgeight_softc *sc; 509 register int start, ncolors; 510 { 511 register volatile struct bt_regs *bt; 512 register u_int *ip; 513 register int count; 514 515 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 516 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 517 bt = &sc->sc_fbc->fbc_dac; 518 bt->bt_addr = BT_D4M4(start); 519 while (--count >= 0) 520 bt->bt_cmap = *ip++; 521 } 522 #endif 523