1 /* $NetBSD: cgfour.c,v 1.13 1997/05/24 20:16:06 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 *) 210 mapiodev(ca->ca_ra.ra_reg, 0, sizeof(u_int32_t)); 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); 255 } 256 #endif 257 258 /* Map the Brooktree. */ 259 sc->sc_fbc = (volatile struct fbcontrol *) 260 mapiodev(ca->ca_ra.ra_reg, 261 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol)); 262 263 sc->sc_phys = ca->ca_ra.ra_reg[0]; 264 sc->sc_bustype = ca->ca_bustype; 265 266 /* grab initial (current) color map */ 267 bt = &sc->sc_fbc->fbc_dac; 268 bt->bt_addr = 0; 269 for (i = 0; i < 256 * 3 / 4; i++) 270 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 271 272 BT_INIT(bt, 24); 273 274 #if 0 /* See above. */ 275 if (isconsole) { 276 printf(" (console)\n"); 277 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 278 fbrcons_init(fb); 279 #endif 280 } else 281 #endif /* 0 */ 282 printf("\n"); 283 284 /* 285 * Even though we're not using rconsole, we'd still like 286 * to notice if we're the console framebuffer. 287 */ 288 fb_attach(fb, isconsole); 289 #endif 290 } 291 292 int 293 cgfouropen(dev, flags, mode, p) 294 dev_t dev; 295 int flags, mode; 296 struct proc *p; 297 { 298 int unit = minor(dev); 299 300 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 301 return (ENXIO); 302 return (0); 303 } 304 305 int 306 cgfourclose(dev, flags, mode, p) 307 dev_t dev; 308 int flags, mode; 309 struct proc *p; 310 { 311 312 return (0); 313 } 314 315 int 316 cgfourioctl(dev, cmd, data, flags, p) 317 dev_t dev; 318 u_long cmd; 319 register caddr_t data; 320 int flags; 321 struct proc *p; 322 { 323 #if defined(SUN4) 324 register struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 325 register struct fbgattr *fba; 326 int error; 327 328 switch (cmd) { 329 330 case FBIOGTYPE: 331 *(struct fbtype *)data = sc->sc_fb.fb_type; 332 break; 333 334 case FBIOGATTR: 335 fba = (struct fbgattr *)data; 336 fba->real_type = sc->sc_fb.fb_type.fb_type; 337 fba->owner = 0; /* XXX ??? */ 338 fba->fbtype = sc->sc_fb.fb_type; 339 fba->sattr.flags = 0; 340 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 341 fba->sattr.dev_specific[0] = -1; 342 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 343 fba->emu_types[1] = -1; 344 break; 345 346 case FBIOGETCMAP: 347 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 348 349 case FBIOPUTCMAP: 350 /* copy to software map */ 351 #define p ((struct fbcmap *)data) 352 error = bt_putcmap(p, &sc->sc_cmap, 256); 353 if (error) 354 return (error); 355 /* now blast them into the chip */ 356 /* XXX should use retrace interrupt */ 357 cgfourloadcmap(sc, p->index, p->count); 358 #undef p 359 break; 360 361 case FBIOGVIDEO: 362 *(int *)data = cgfour_get_video(sc); 363 break; 364 365 case FBIOSVIDEO: 366 cgfour_set_video(sc, *(int *)data); 367 break; 368 369 default: 370 return (ENOTTY); 371 } 372 #endif 373 return (0); 374 } 375 376 int 377 cgfourpoll(dev, events, p) 378 dev_t dev; 379 int events; 380 struct proc *p; 381 { 382 383 return (seltrue(dev, events, p)); 384 } 385 386 /* 387 * Return the address that would map the given device at the given 388 * offset, allowing for the given protection, or return -1 for error. 389 * 390 * the cg4 maps it's overlay plane for 128K, followed by the enable 391 * plane for 128K, followed by the colour plane (for as much colour 392 * as their is.) 393 * 394 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 395 * only it's colour plane, at 0. 396 */ 397 int 398 cgfourmmap(dev, off, prot) 399 dev_t dev; 400 int off, prot; 401 { 402 register struct cgfour_softc *sc = cgfour_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) 409 #define END_COLOR (START_COLOR + COLOR_SIZE) 410 #define NOOVERLAY (0x04000000) 411 412 if (off & PGOFSET) 413 panic("cgfourmap"); 414 415 if ((u_int)off >= NOOVERLAY) { 416 off -= NOOVERLAY; 417 418 /* 419 * X11 maps a huge chunk of the frame buffer; far more than 420 * there really is. We compensate by double-mapping the 421 * first page for as many other pages as it wants 422 */ 423 while (off >= COLOR_SIZE) 424 off -= COLOR_SIZE; /* XXX thorpej ??? */ 425 426 poff = off + PFOUR_COLOR_OFF_COLOR; 427 } else if ((u_int)off < START_ENABLE) { 428 /* 429 * in overlay plane 430 */ 431 poff = PFOUR_COLOR_OFF_OVERLAY + off; 432 } else if ((u_int)off < START_COLOR) { 433 /* 434 * in enable plane 435 */ 436 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 437 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 438 /* 439 * in colour plane 440 */ 441 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 442 } else 443 return (-1); 444 445 return (REG2PHYS(&sc->sc_phys, poff) | PMAP_NC); 446 } 447 448 #if defined(SUN4) 449 /* 450 * Undo the effect of an FBIOSVIDEO that turns the video off. 451 */ 452 static void 453 cgfourunblank(dev) 454 struct device *dev; 455 { 456 457 cgfour_set_video((struct cgfour_softc *)dev, 1); 458 } 459 460 static int 461 cgfour_get_video(sc) 462 struct cgfour_softc *sc; 463 { 464 465 return (fb_pfour_get_video(&sc->sc_fb)); 466 } 467 468 static void 469 cgfour_set_video(sc, enable) 470 struct cgfour_softc *sc; 471 int enable; 472 { 473 474 fb_pfour_set_video(&sc->sc_fb, enable); 475 } 476 477 /* 478 * Load a subset of the current (new) colormap into the Brooktree DAC. 479 */ 480 static void 481 cgfourloadcmap(sc, start, ncolors) 482 register struct cgfour_softc *sc; 483 register int start, ncolors; 484 { 485 register volatile struct bt_regs *bt; 486 register u_int *ip, i; 487 register int count; 488 489 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 490 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 491 bt = &sc->sc_fbc->fbc_dac; 492 bt->bt_addr = BT_D4M4(start) << 24; 493 while (--count >= 0) { 494 i = *ip++; 495 /* hardware that makes one want to pound boards with hammers */ 496 bt->bt_cmap = i; 497 bt->bt_cmap = i << 8; 498 bt->bt_cmap = i << 16; 499 bt->bt_cmap = i << 24; 500 } 501 } 502 #endif 503