1 /* $NetBSD: cgfour.c,v 1.12 1996/12/10 22:54:48 pk Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Jason R. Thorpe. All rights reserved. 5 * Copyright (c) 1995 Theo de Raadt. All rights reserved. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by Theo de Raadt. 12 * 13 * This software was developed by the Computer Systems Engineering group 14 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 15 * contributed to Berkeley. 16 * 17 * All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Lawrence Berkeley Laboratory. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * This product includes software developed by the University of 33 * California, Berkeley and its contributors. 34 * 4. Neither the name of the University nor the names of its contributors 35 * may be used to endorse or promote products derived from this software 36 * without specific prior written permission. 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 41 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * 50 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 51 */ 52 53 /* 54 * color display (cgfour) driver. 55 * 56 * Does not handle interrupts, even though they can occur. 57 * 58 * XXX should defer colormap updates to vertical retrace interrupts 59 */ 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/buf.h> 64 #include <sys/device.h> 65 #include <sys/ioctl.h> 66 #include <sys/malloc.h> 67 #include <sys/mman.h> 68 #include <sys/tty.h> 69 #include <sys/conf.h> 70 71 #include <vm/vm.h> 72 73 #include <machine/fbio.h> 74 #include <machine/autoconf.h> 75 #include <machine/pmap.h> 76 #include <machine/fbvar.h> 77 #include <machine/eeprom.h> 78 #include <machine/conf.h> 79 80 #include <sparc/dev/btreg.h> 81 #include <sparc/dev/btvar.h> 82 #include <sparc/dev/pfourreg.h> 83 84 /* per-display variables */ 85 struct cgfour_softc { 86 struct device sc_dev; /* base device */ 87 struct fbdevice sc_fb; /* frame buffer device */ 88 struct rom_reg sc_phys; /* display RAM (phys addr) */ 89 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 90 int sc_bustype; /* type of bus we live on */ 91 union bt_cmap sc_cmap; /* Brooktree color map */ 92 }; 93 94 /* autoconfiguration driver */ 95 static void cgfourattach __P((struct device *, struct device *, void *)); 96 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 97 #if defined(SUN4) 98 static void cgfourunblank __P((struct device *)); 99 #endif 100 101 /* cdevsw prototypes */ 102 cdev_decl(cgfour); 103 104 struct cfattach cgfour_ca = { 105 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 106 }; 107 108 struct cfdriver cgfour_cd = { 109 NULL, "cgfour", DV_DULL 110 }; 111 112 #if defined(SUN4) 113 /* frame buffer generic driver */ 114 static struct fbdriver cgfourfbdriver = { 115 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 116 cgfourmmap 117 }; 118 119 extern int fbnode; 120 extern struct tty *fbconstty; 121 122 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 123 static int cgfour_get_video __P((struct cgfour_softc *)); 124 static void cgfour_set_video __P((struct cgfour_softc *, int)); 125 #endif 126 127 /* 128 * Match a cgfour. 129 */ 130 int 131 cgfourmatch(parent, cf, aux) 132 struct device *parent; 133 struct cfdata *cf; 134 void *aux; 135 { 136 struct confargs *ca = aux; 137 struct romaux *ra = &ca->ca_ra; 138 139 if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) 140 return (0); 141 142 /* 143 * Mask out invalid flags from the user. 144 */ 145 cf->cf_flags &= FB_USERMASK; 146 147 /* 148 * Only exists on a sun4. 149 */ 150 if (!CPU_ISSUN4) 151 return (0); 152 153 /* 154 * Only exists on obio. 155 */ 156 if (ca->ca_bustype != BUS_OBIO) 157 return (0); 158 159 /* 160 * Make sure there's hardware there. 161 */ 162 if (probeget(ra->ra_vaddr, 4) == -1) 163 return (0); 164 165 #if defined(SUN4) 166 /* 167 * Check the pfour register. 168 */ 169 if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR8P1) { 170 cf->cf_flags |= FB_PFOUR; 171 return (1); 172 } 173 #endif 174 175 return (0); 176 } 177 178 /* 179 * Attach a display. We need to notice if it is the console, too. 180 */ 181 void 182 cgfourattach(parent, self, args) 183 struct device *parent, *self; 184 void *args; 185 { 186 #if defined(SUN4) 187 register struct cgfour_softc *sc = (struct cgfour_softc *)self; 188 register struct confargs *ca = args; 189 register int node = 0, ramsize, i; 190 register volatile struct bt_regs *bt; 191 struct fbdevice *fb = &sc->sc_fb; 192 int isconsole; 193 194 fb->fb_driver = &cgfourfbdriver; 195 fb->fb_device = &sc->sc_dev; 196 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 197 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 198 199 /* 200 * Only pfour cgfours, thank you... 201 */ 202 if ((ca->ca_bustype != BUS_OBIO) || 203 ((fb->fb_flags & FB_PFOUR) == 0)) { 204 printf("%s: ignoring; not a pfour\n", sc->sc_dev.dv_xname); 205 return; 206 } 207 208 /* Map the pfour register. */ 209 fb->fb_pfour = (volatile u_int32_t *)mapiodev(ca->ca_ra.ra_reg, 0, 210 sizeof(u_int32_t), ca->ca_bustype); 211 212 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 213 214 fb->fb_type.fb_depth = 8; 215 fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); 216 217 fb->fb_type.fb_cmsize = 256; 218 fb->fb_type.fb_size = ramsize; 219 printf(": cgfour/p4, %d x %d", fb->fb_type.fb_width, 220 fb->fb_type.fb_height); 221 222 isconsole = 0; 223 224 if (CPU_ISSUN4) { 225 struct eeprom *eep = (struct eeprom *)eeprom_va; 226 227 /* 228 * Assume this is the console if there's no eeprom info 229 * to be found. 230 */ 231 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 232 isconsole = (fbconstty != NULL); 233 } 234 235 #if 0 236 /* 237 * We don't do any of the console handling here. Instead, 238 * we let the bwtwo driver pick up the overlay plane and 239 * use it instead. Rconsole should have better performance 240 * with the 1-bit depth. 241 * -- Jason R. Thorpe <thorpej@NetBSD.ORG> 242 */ 243 244 /* 245 * When the ROM has mapped in a cgfour display, the address 246 * maps only the video RAM, so in any case we have to map the 247 * registers ourselves. We only need the video RAM if we are 248 * going to print characters via rconsole. 249 */ 250 251 if (isconsole) { 252 /* XXX this is kind of a waste */ 253 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 254 PFOUR_COLOR_OFF_OVERLAY, ramsize, ca->ca_bustype); 255 } 256 #endif 257 258 /* Map the Brooktree. */ 259 sc->sc_fbc = (volatile struct fbcontrol *)mapiodev(ca->ca_ra.ra_reg, 260 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol), ca->ca_bustype); 261 262 sc->sc_phys = ca->ca_ra.ra_reg[0]; 263 sc->sc_bustype = ca->ca_bustype; 264 265 /* grab initial (current) color map */ 266 bt = &sc->sc_fbc->fbc_dac; 267 bt->bt_addr = 0; 268 for (i = 0; i < 256 * 3 / 4; i++) 269 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 270 271 BT_INIT(bt, 24); 272 273 #if 0 /* See above. */ 274 if (isconsole) { 275 printf(" (console)\n"); 276 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 277 fbrcons_init(fb); 278 #endif 279 } else 280 #endif /* 0 */ 281 printf("\n"); 282 283 /* 284 * Even though we're not using rconsole, we'd still like 285 * to notice if we're the console framebuffer. 286 */ 287 fb_attach(fb, isconsole); 288 #endif 289 } 290 291 int 292 cgfouropen(dev, flags, mode, p) 293 dev_t dev; 294 int flags, mode; 295 struct proc *p; 296 { 297 int unit = minor(dev); 298 299 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 300 return (ENXIO); 301 return (0); 302 } 303 304 int 305 cgfourclose(dev, flags, mode, p) 306 dev_t dev; 307 int flags, mode; 308 struct proc *p; 309 { 310 311 return (0); 312 } 313 314 int 315 cgfourioctl(dev, cmd, data, flags, p) 316 dev_t dev; 317 u_long cmd; 318 register caddr_t data; 319 int flags; 320 struct proc *p; 321 { 322 #if defined(SUN4) 323 register struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 324 register struct fbgattr *fba; 325 int error; 326 327 switch (cmd) { 328 329 case FBIOGTYPE: 330 *(struct fbtype *)data = sc->sc_fb.fb_type; 331 break; 332 333 case FBIOGATTR: 334 fba = (struct fbgattr *)data; 335 fba->real_type = sc->sc_fb.fb_type.fb_type; 336 fba->owner = 0; /* XXX ??? */ 337 fba->fbtype = sc->sc_fb.fb_type; 338 fba->sattr.flags = 0; 339 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 340 fba->sattr.dev_specific[0] = -1; 341 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 342 fba->emu_types[1] = -1; 343 break; 344 345 case FBIOGETCMAP: 346 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 347 348 case FBIOPUTCMAP: 349 /* copy to software map */ 350 #define p ((struct fbcmap *)data) 351 error = bt_putcmap(p, &sc->sc_cmap, 256); 352 if (error) 353 return (error); 354 /* now blast them into the chip */ 355 /* XXX should use retrace interrupt */ 356 cgfourloadcmap(sc, p->index, p->count); 357 #undef p 358 break; 359 360 case FBIOGVIDEO: 361 *(int *)data = cgfour_get_video(sc); 362 break; 363 364 case FBIOSVIDEO: 365 cgfour_set_video(sc, *(int *)data); 366 break; 367 368 default: 369 return (ENOTTY); 370 } 371 #endif 372 return (0); 373 } 374 375 int 376 cgfourpoll(dev, events, p) 377 dev_t dev; 378 int events; 379 struct proc *p; 380 { 381 382 return (seltrue(dev, events, p)); 383 } 384 385 /* 386 * Return the address that would map the given device at the given 387 * offset, allowing for the given protection, or return -1 for error. 388 * 389 * the cg4 maps it's overlay plane for 128K, followed by the enable 390 * plane for 128K, followed by the colour plane (for as much colour 391 * as their is.) 392 * 393 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 394 * only it's colour plane, at 0. 395 */ 396 int 397 cgfourmmap(dev, off, prot) 398 dev_t dev; 399 int off, prot; 400 { 401 register struct cgfour_softc *sc = cgfour_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) 408 #define END_COLOR (START_COLOR + COLOR_SIZE) 409 #define NOOVERLAY (0x04000000) 410 411 if (off & PGOFSET) 412 panic("cgfourmap"); 413 414 if ((u_int)off >= NOOVERLAY) { 415 off -= NOOVERLAY; 416 417 /* 418 * X11 maps a huge chunk of the frame buffer; far more than 419 * there really is. We compensate by double-mapping the 420 * first page for as many other pages as it wants 421 */ 422 while (off >= COLOR_SIZE) 423 off -= COLOR_SIZE; /* XXX thorpej ??? */ 424 425 poff = off + PFOUR_COLOR_OFF_COLOR; 426 } else if ((u_int)off < START_ENABLE) { 427 /* 428 * in overlay plane 429 */ 430 poff = PFOUR_COLOR_OFF_OVERLAY + off; 431 } else if ((u_int)off < START_COLOR) { 432 /* 433 * in enable plane 434 */ 435 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 436 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 437 /* 438 * in colour plane 439 */ 440 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 441 } else 442 return (-1); 443 444 return (REG2PHYS(&sc->sc_phys, poff, sc->sc_bustype) | PMAP_NC); 445 } 446 447 #if defined(SUN4) 448 /* 449 * Undo the effect of an FBIOSVIDEO that turns the video off. 450 */ 451 static void 452 cgfourunblank(dev) 453 struct device *dev; 454 { 455 456 cgfour_set_video((struct cgfour_softc *)dev, 1); 457 } 458 459 static int 460 cgfour_get_video(sc) 461 struct cgfour_softc *sc; 462 { 463 464 return (fb_pfour_get_video(&sc->sc_fb)); 465 } 466 467 static void 468 cgfour_set_video(sc, enable) 469 struct cgfour_softc *sc; 470 int enable; 471 { 472 473 fb_pfour_set_video(&sc->sc_fb, enable); 474 } 475 476 /* 477 * Load a subset of the current (new) colormap into the Brooktree DAC. 478 */ 479 static void 480 cgfourloadcmap(sc, start, ncolors) 481 register struct cgfour_softc *sc; 482 register int start, ncolors; 483 { 484 register volatile struct bt_regs *bt; 485 register u_int *ip, i; 486 register int count; 487 488 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 489 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 490 bt = &sc->sc_fbc->fbc_dac; 491 bt->bt_addr = BT_D4M4(start) << 24; 492 while (--count >= 0) { 493 i = *ip++; 494 /* hardware that makes one want to pound boards with hammers */ 495 bt->bt_cmap = i; 496 bt->bt_cmap = i << 8; 497 bt->bt_cmap = i << 16; 498 bt->bt_cmap = i << 24; 499 } 500 } 501 #endif 502