1 /* $NetBSD: cgeight.c,v 1.11 1996/10/13 02:59:33 christos 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 *, void *, 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, vcf, aux) 128 struct device *parent; 129 void *vcf, *aux; 130 { 131 struct cfdata *cf = vcf; 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 *)mapiodev(ca->ca_ra.ra_reg, 0, 206 sizeof(u_int32_t), ca->ca_bustype); 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, ca->ca_bustype); 251 } 252 #endif 253 254 /* Map the Brooktree. */ 255 sc->sc_fbc = (volatile struct fbcontrol *)mapiodev(ca->ca_ra.ra_reg, 256 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol), ca->ca_bustype); 257 258 sc->sc_phys = ca->ca_ra.ra_reg[0]; 259 sc->sc_bustype = ca->ca_bustype; 260 261 #if 0 /* XXX thorpej ??? */ 262 /* tell the enable plane to look at the mono image */ 263 memset(ca->ca_ra.ra_vaddr, 0xff, 264 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 265 #endif 266 267 /* grab initial (current) color map */ 268 bt = &sc->sc_fbc->fbc_dac; 269 bt->bt_addr = 0; 270 for (i = 0; i < 256 * 3 / 4; i++) 271 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 272 273 BT_INIT(bt, 0); 274 275 #if 0 /* see above */ 276 if (isconsole) { 277 printf(" (console)\n"); 278 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 279 fbrcons_init(fb); 280 #endif 281 } else 282 #endif /* 0 */ 283 printf("\n"); 284 285 /* 286 * Even though we're not using rconsole, we'd still like 287 * to notice if we're the console framebuffer. 288 */ 289 fb_attach(&sc->sc_fb, isconsole); 290 #endif 291 } 292 293 int 294 cgeightopen(dev, flags, mode, p) 295 dev_t dev; 296 int flags, mode; 297 struct proc *p; 298 { 299 int unit = minor(dev); 300 301 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 302 return (ENXIO); 303 return (0); 304 } 305 306 int 307 cgeightclose(dev, flags, mode, p) 308 dev_t dev; 309 int flags, mode; 310 struct proc *p; 311 { 312 313 return (0); 314 } 315 316 int 317 cgeightioctl(dev, cmd, data, flags, p) 318 dev_t dev; 319 u_long cmd; 320 register caddr_t data; 321 int flags; 322 struct proc *p; 323 { 324 #if defined(SUN4) 325 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 326 register struct fbgattr *fba; 327 int error; 328 329 switch (cmd) { 330 331 case FBIOGTYPE: 332 *(struct fbtype *)data = sc->sc_fb.fb_type; 333 break; 334 335 case FBIOGATTR: 336 fba = (struct fbgattr *)data; 337 fba->real_type = sc->sc_fb.fb_type.fb_type; 338 fba->owner = 0; /* XXX ??? */ 339 fba->fbtype = sc->sc_fb.fb_type; 340 fba->sattr.flags = 0; 341 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 342 fba->sattr.dev_specific[0] = -1; 343 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 344 fba->emu_types[1] = -1; 345 break; 346 347 case FBIOGETCMAP: 348 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 349 350 case FBIOPUTCMAP: 351 /* copy to software map */ 352 #define p ((struct fbcmap *)data) 353 error = bt_putcmap(p, &sc->sc_cmap, 256); 354 if (error) 355 return (error); 356 /* now blast them into the chip */ 357 /* XXX should use retrace interrupt */ 358 cgeightloadcmap(sc, p->index, p->count); 359 #undef p 360 break; 361 362 case FBIOGVIDEO: 363 *(int *)data = cgeight_get_video(sc); 364 break; 365 366 case FBIOSVIDEO: 367 cgeight_set_video(sc, *(int *)data); 368 break; 369 370 default: 371 return (ENOTTY); 372 } 373 #endif 374 return (0); 375 } 376 377 int 378 cgeightpoll(dev, events, p) 379 dev_t dev; 380 int events; 381 struct proc *p; 382 { 383 384 return (seltrue(dev, events, p)); 385 } 386 387 /* 388 * Return the address that would map the given device at the given 389 * offset, allowing for the given protection, or return -1 for error. 390 * 391 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 392 * enable plane for 128K, followed by the colour for as long as it 393 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 394 * register for NBPG, then the bootrom for 0x40000. 395 */ 396 int 397 cgeightmmap(dev, off, prot) 398 dev_t dev; 399 int off, prot; 400 { 401 register struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 402 int poff; 403 404 #define START_ENABLE (128*1024) 405 #define START_COLOR ((128*1024) + (128*1024)) 406 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 407 sc->sc_fb.fb_type.fb_height * 3) 408 #define END_COLOR (START_COLOR + COLOR_SIZE) 409 #define START_SPECIAL 0x800000 410 #define PROMSIZE 0x40000 411 #define NOOVERLAY (0x04000000) 412 413 if (off & PGOFSET) 414 panic("cgeightmap"); 415 416 if ((u_int)off >= NOOVERLAY) { 417 off -= NOOVERLAY; 418 419 /* 420 * X11 maps a huge chunk of the frame buffer; far more than 421 * there really is. We compensate by double-mapping the 422 * first page for as many other pages as it wants 423 */ 424 while (off >= COLOR_SIZE) 425 off -= COLOR_SIZE; /* XXX thorpej ??? */ 426 427 poff = off + PFOUR_COLOR_OFF_COLOR; 428 } else if ((u_int)off < START_ENABLE) { 429 /* 430 * in overlay plane 431 */ 432 poff = PFOUR_COLOR_OFF_OVERLAY + off; 433 } else if ((u_int)off < START_COLOR) { 434 /* 435 * in enable plane 436 */ 437 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 438 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 439 /* 440 * in colour plane 441 */ 442 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 443 } else if ((u_int)off < START_SPECIAL) { 444 /* 445 * hole 446 */ 447 poff = 0; /* XXX */ 448 } else if ((u_int)off == START_SPECIAL) { 449 /* 450 * colour map (Brooktree) 451 */ 452 poff = PFOUR_COLOR_OFF_CMAP; 453 } else if ((u_int)off == START_SPECIAL + NBPG) { 454 /* 455 * p4 register 456 */ 457 poff = 0; 458 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 459 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 460 /* 461 * rom 462 */ 463 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 464 } else 465 return (-1); 466 /* 467 * I turned on PMAP_NC here to disable the cache as I was 468 * getting horribly broken behaviour with it on. 469 */ 470 return (REG2PHYS(&sc->sc_phys, poff, sc->sc_bustype) | PMAP_NC); 471 } 472 473 #if defined(SUN4) 474 /* 475 * Undo the effect of an FBIOSVIDEO that turns the video off. 476 */ 477 static void 478 cgeightunblank(dev) 479 struct device *dev; 480 { 481 482 cgeight_set_video((struct cgeight_softc *)dev, 1); 483 } 484 485 static int 486 cgeight_get_video(sc) 487 struct cgeight_softc *sc; 488 { 489 490 return (fb_pfour_get_video(&sc->sc_fb)); 491 } 492 493 static void 494 cgeight_set_video(sc, enable) 495 struct cgeight_softc *sc; 496 int enable; 497 { 498 499 fb_pfour_set_video(&sc->sc_fb, enable); 500 } 501 502 /* 503 * Load a subset of the current (new) colormap into the Brooktree DAC. 504 */ 505 static void 506 cgeightloadcmap(sc, start, ncolors) 507 register struct cgeight_softc *sc; 508 register int start, ncolors; 509 { 510 register volatile struct bt_regs *bt; 511 register u_int *ip; 512 register int count; 513 514 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 515 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 516 bt = &sc->sc_fbc->fbc_dac; 517 bt->bt_addr = BT_D4M4(start); 518 while (--count >= 0) 519 bt->bt_cmap = *ip++; 520 } 521 #endif 522