cgfour.c revision 1.15
1 /* $NetBSD: cgfour.c,v 1.15 1998/01/12 20:23:42 thorpej 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. All rights reserved. 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by Theo de Raadt. 47 * 48 * This software was developed by the Computer Systems Engineering group 49 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 50 * contributed to Berkeley. 51 * 52 * All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Lawrence Berkeley Laboratory. 56 * 57 * Redistribution and use in source and binary forms, with or without 58 * modification, are permitted provided that the following conditions 59 * are met: 60 * 1. Redistributions of source code must retain the above copyright 61 * notice, this list of conditions and the following disclaimer. 62 * 2. Redistributions in binary form must reproduce the above copyright 63 * notice, this list of conditions and the following disclaimer in the 64 * documentation and/or other materials provided with the distribution. 65 * 3. All advertising materials mentioning features or use of this software 66 * must display the following acknowledgement: 67 * This product includes software developed by the University of 68 * California, Berkeley and its contributors. 69 * 4. Neither the name of the University nor the names of its contributors 70 * may be used to endorse or promote products derived from this software 71 * without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 74 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 77 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 78 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 79 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 80 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 81 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 82 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 83 * SUCH DAMAGE. 84 * 85 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 86 */ 87 88 /* 89 * color display (cgfour) driver. 90 * 91 * Does not handle interrupts, even though they can occur. 92 * 93 * XXX should defer colormap updates to vertical retrace interrupts 94 */ 95 96 #include <sys/param.h> 97 #include <sys/systm.h> 98 #include <sys/buf.h> 99 #include <sys/device.h> 100 #include <sys/ioctl.h> 101 #include <sys/malloc.h> 102 #include <sys/mman.h> 103 #include <sys/tty.h> 104 #include <sys/conf.h> 105 106 #include <vm/vm.h> 107 108 #include <machine/fbio.h> 109 #include <machine/autoconf.h> 110 #include <machine/pmap.h> 111 #include <machine/fbvar.h> 112 #include <machine/eeprom.h> 113 #include <machine/conf.h> 114 115 #include <sparc/dev/btreg.h> 116 #include <sparc/dev/btvar.h> 117 #include <sparc/dev/pfourreg.h> 118 119 /* per-display variables */ 120 struct cgfour_softc { 121 struct device sc_dev; /* base device */ 122 struct fbdevice sc_fb; /* frame buffer device */ 123 struct rom_reg sc_phys; /* display RAM (phys addr) */ 124 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 125 int sc_bustype; /* type of bus we live on */ 126 union bt_cmap sc_cmap; /* Brooktree color map */ 127 }; 128 129 /* autoconfiguration driver */ 130 static void cgfourattach __P((struct device *, struct device *, void *)); 131 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 132 #if defined(SUN4) 133 static void cgfourunblank __P((struct device *)); 134 #endif 135 136 /* cdevsw prototypes */ 137 cdev_decl(cgfour); 138 139 struct cfattach cgfour_ca = { 140 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 141 }; 142 143 extern struct cfdriver cgfour_cd; 144 145 #if defined(SUN4) 146 /* frame buffer generic driver */ 147 static struct fbdriver cgfourfbdriver = { 148 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 149 cgfourmmap 150 }; 151 152 extern int fbnode; 153 extern struct tty *fbconstty; 154 155 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 156 static int cgfour_get_video __P((struct cgfour_softc *)); 157 static void cgfour_set_video __P((struct cgfour_softc *, int)); 158 #endif 159 160 /* 161 * Match a cgfour. 162 */ 163 int 164 cgfourmatch(parent, cf, aux) 165 struct device *parent; 166 struct cfdata *cf; 167 void *aux; 168 { 169 struct confargs *ca = aux; 170 struct romaux *ra = &ca->ca_ra; 171 172 if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) 173 return (0); 174 175 /* 176 * Mask out invalid flags from the user. 177 */ 178 cf->cf_flags &= FB_USERMASK; 179 180 /* 181 * Only exists on a sun4. 182 */ 183 if (!CPU_ISSUN4) 184 return (0); 185 186 /* 187 * Only exists on obio. 188 */ 189 if (ca->ca_bustype != BUS_OBIO) 190 return (0); 191 192 /* 193 * Make sure there's hardware there. 194 */ 195 if (probeget(ra->ra_vaddr, 4) == -1) 196 return (0); 197 198 #if defined(SUN4) 199 /* 200 * Check the pfour register. 201 */ 202 if (fb_pfour_id(ra->ra_vaddr) == PFOUR_ID_COLOR8P1) { 203 cf->cf_flags |= FB_PFOUR; 204 return (1); 205 } 206 #endif 207 208 return (0); 209 } 210 211 /* 212 * Attach a display. We need to notice if it is the console, too. 213 */ 214 void 215 cgfourattach(parent, self, args) 216 struct device *parent, *self; 217 void *args; 218 { 219 #if defined(SUN4) 220 register struct cgfour_softc *sc = (struct cgfour_softc *)self; 221 register struct confargs *ca = args; 222 register int node = 0, ramsize, i; 223 register volatile struct bt_regs *bt; 224 struct fbdevice *fb = &sc->sc_fb; 225 int isconsole; 226 227 fb->fb_driver = &cgfourfbdriver; 228 fb->fb_device = &sc->sc_dev; 229 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 230 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags; 231 232 /* 233 * Only pfour cgfours, thank you... 234 */ 235 if ((ca->ca_bustype != BUS_OBIO) || 236 ((fb->fb_flags & FB_PFOUR) == 0)) { 237 printf("%s: ignoring; not a pfour\n", sc->sc_dev.dv_xname); 238 return; 239 } 240 241 /* Map the pfour register. */ 242 fb->fb_pfour = (volatile u_int32_t *) 243 mapiodev(ca->ca_ra.ra_reg, 0, sizeof(u_int32_t)); 244 245 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 246 247 fb->fb_type.fb_depth = 8; 248 fb_setsize(fb, fb->fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); 249 250 fb->fb_type.fb_cmsize = 256; 251 fb->fb_type.fb_size = ramsize; 252 printf(": cgfour/p4, %d x %d", fb->fb_type.fb_width, 253 fb->fb_type.fb_height); 254 255 isconsole = 0; 256 257 if (CPU_ISSUN4) { 258 struct eeprom *eep = (struct eeprom *)eeprom_va; 259 260 /* 261 * Assume this is the console if there's no eeprom info 262 * to be found. 263 */ 264 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 265 isconsole = (fbconstty != NULL); 266 } 267 268 #if 0 269 /* 270 * We don't do any of the console handling here. Instead, 271 * we let the bwtwo driver pick up the overlay plane and 272 * use it instead. Rconsole should have better performance 273 * with the 1-bit depth. 274 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 275 */ 276 277 /* 278 * When the ROM has mapped in a cgfour display, the address 279 * maps only the video RAM, so in any case we have to map the 280 * registers ourselves. We only need the video RAM if we are 281 * going to print characters via rconsole. 282 */ 283 284 if (isconsole) { 285 /* XXX this is kind of a waste */ 286 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 287 PFOUR_COLOR_OFF_OVERLAY, ramsize); 288 } 289 #endif 290 291 /* Map the Brooktree. */ 292 sc->sc_fbc = (volatile struct fbcontrol *) 293 mapiodev(ca->ca_ra.ra_reg, 294 PFOUR_COLOR_OFF_CMAP, sizeof(struct fbcontrol)); 295 296 sc->sc_phys = ca->ca_ra.ra_reg[0]; 297 sc->sc_bustype = ca->ca_bustype; 298 299 /* grab initial (current) color map */ 300 bt = &sc->sc_fbc->fbc_dac; 301 bt->bt_addr = 0; 302 for (i = 0; i < 256 * 3 / 4; i++) 303 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 304 305 BT_INIT(bt, 24); 306 307 #if 0 /* See above. */ 308 if (isconsole) { 309 printf(" (console)\n"); 310 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 311 fbrcons_init(fb); 312 #endif 313 } else 314 #endif /* 0 */ 315 printf("\n"); 316 317 /* 318 * Even though we're not using rconsole, we'd still like 319 * to notice if we're the console framebuffer. 320 */ 321 fb_attach(fb, isconsole); 322 #endif 323 } 324 325 int 326 cgfouropen(dev, flags, mode, p) 327 dev_t dev; 328 int flags, mode; 329 struct proc *p; 330 { 331 int unit = minor(dev); 332 333 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 334 return (ENXIO); 335 return (0); 336 } 337 338 int 339 cgfourclose(dev, flags, mode, p) 340 dev_t dev; 341 int flags, mode; 342 struct proc *p; 343 { 344 345 return (0); 346 } 347 348 int 349 cgfourioctl(dev, cmd, data, flags, p) 350 dev_t dev; 351 u_long cmd; 352 register caddr_t data; 353 int flags; 354 struct proc *p; 355 { 356 #if defined(SUN4) 357 register struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 358 register struct fbgattr *fba; 359 int error; 360 361 switch (cmd) { 362 363 case FBIOGTYPE: 364 *(struct fbtype *)data = sc->sc_fb.fb_type; 365 break; 366 367 case FBIOGATTR: 368 fba = (struct fbgattr *)data; 369 fba->real_type = sc->sc_fb.fb_type.fb_type; 370 fba->owner = 0; /* XXX ??? */ 371 fba->fbtype = sc->sc_fb.fb_type; 372 fba->sattr.flags = 0; 373 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 374 fba->sattr.dev_specific[0] = -1; 375 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 376 fba->emu_types[1] = -1; 377 break; 378 379 case FBIOGETCMAP: 380 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 381 382 case FBIOPUTCMAP: 383 /* copy to software map */ 384 #define p ((struct fbcmap *)data) 385 error = bt_putcmap(p, &sc->sc_cmap, 256); 386 if (error) 387 return (error); 388 /* now blast them into the chip */ 389 /* XXX should use retrace interrupt */ 390 cgfourloadcmap(sc, p->index, p->count); 391 #undef p 392 break; 393 394 case FBIOGVIDEO: 395 *(int *)data = cgfour_get_video(sc); 396 break; 397 398 case FBIOSVIDEO: 399 cgfour_set_video(sc, *(int *)data); 400 break; 401 402 default: 403 return (ENOTTY); 404 } 405 #endif 406 return (0); 407 } 408 409 int 410 cgfourpoll(dev, events, p) 411 dev_t dev; 412 int events; 413 struct proc *p; 414 { 415 416 return (seltrue(dev, events, p)); 417 } 418 419 /* 420 * Return the address that would map the given device at the given 421 * offset, allowing for the given protection, or return -1 for error. 422 * 423 * the cg4 maps it's overlay plane for 128K, followed by the enable 424 * plane for 128K, followed by the colour plane (for as much colour 425 * as their is.) 426 * 427 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 428 * only it's colour plane, at 0. 429 */ 430 int 431 cgfourmmap(dev, off, prot) 432 dev_t dev; 433 int off, prot; 434 { 435 register struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 436 int poff; 437 438 #define START_ENABLE (128*1024) 439 #define START_COLOR ((128*1024) + (128*1024)) 440 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 441 sc->sc_fb.fb_type.fb_height) 442 #define END_COLOR (START_COLOR + COLOR_SIZE) 443 #define NOOVERLAY (0x04000000) 444 445 if (off & PGOFSET) 446 panic("cgfourmap"); 447 448 if ((u_int)off >= NOOVERLAY) { 449 off -= NOOVERLAY; 450 451 /* 452 * X11 maps a huge chunk of the frame buffer; far more than 453 * there really is. We compensate by double-mapping the 454 * first page for as many other pages as it wants 455 */ 456 while (off >= COLOR_SIZE) 457 off -= COLOR_SIZE; /* XXX thorpej ??? */ 458 459 poff = off + PFOUR_COLOR_OFF_COLOR; 460 } else if ((u_int)off < START_ENABLE) { 461 /* 462 * in overlay plane 463 */ 464 poff = PFOUR_COLOR_OFF_OVERLAY + off; 465 } else if ((u_int)off < START_COLOR) { 466 /* 467 * in enable plane 468 */ 469 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 470 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 471 /* 472 * in colour plane 473 */ 474 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 475 } else 476 return (-1); 477 478 return (REG2PHYS(&sc->sc_phys, poff) | PMAP_NC); 479 } 480 481 #if defined(SUN4) 482 /* 483 * Undo the effect of an FBIOSVIDEO that turns the video off. 484 */ 485 static void 486 cgfourunblank(dev) 487 struct device *dev; 488 { 489 490 cgfour_set_video((struct cgfour_softc *)dev, 1); 491 } 492 493 static int 494 cgfour_get_video(sc) 495 struct cgfour_softc *sc; 496 { 497 498 return (fb_pfour_get_video(&sc->sc_fb)); 499 } 500 501 static void 502 cgfour_set_video(sc, enable) 503 struct cgfour_softc *sc; 504 int enable; 505 { 506 507 fb_pfour_set_video(&sc->sc_fb, enable); 508 } 509 510 /* 511 * Load a subset of the current (new) colormap into the Brooktree DAC. 512 */ 513 static void 514 cgfourloadcmap(sc, start, ncolors) 515 register struct cgfour_softc *sc; 516 register int start, ncolors; 517 { 518 register volatile struct bt_regs *bt; 519 register u_int *ip, i; 520 register int count; 521 522 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 523 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 524 bt = &sc->sc_fbc->fbc_dac; 525 bt->bt_addr = BT_D4M4(start) << 24; 526 while (--count >= 0) { 527 i = *ip++; 528 /* hardware that makes one want to pound boards with hammers */ 529 bt->bt_cmap = i; 530 bt->bt_cmap = i << 8; 531 bt->bt_cmap = i << 16; 532 bt->bt_cmap = i << 24; 533 } 534 } 535 #endif 536
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