1 /* $NetBSD: cgeight.c,v 1.25 2001/09/24 23:49:31 eeh 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 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This software was developed by the Computer Systems Engineering group 45 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 46 * contributed to Berkeley. 47 * 48 * All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by the University of 51 * California, Lawrence Berkeley Laboratory. 52 * 53 * Redistribution and use in source and binary forms, with or without 54 * modification, are permitted provided that the following conditions 55 * are met: 56 * 1. Redistributions of source code must retain the above copyright 57 * notice, this list of conditions and the following disclaimer. 58 * 2. Redistributions in binary form must reproduce the above copyright 59 * notice, this list of conditions and the following disclaimer in the 60 * documentation and/or other materials provided with the distribution. 61 * 3. All advertising materials mentioning features or use of this software 62 * must display the following acknowledgement: 63 * This product includes software developed by the University of 64 * California, Berkeley and its contributors. 65 * 4. Neither the name of the University nor the names of its contributors 66 * may be used to endorse or promote products derived from this software 67 * without specific prior written permission. 68 * 69 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 70 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 71 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 72 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 73 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 74 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 75 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 76 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 77 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 78 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 79 * SUCH DAMAGE. 80 * 81 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 82 */ 83 84 /* 85 * color display (cgeight) driver. 86 * 87 * Does not handle interrupts, even though they can occur. 88 * 89 * XXX should defer colormap updates to vertical retrace interrupts 90 */ 91 92 #include <sys/param.h> 93 #include <sys/systm.h> 94 #include <sys/buf.h> 95 #include <sys/device.h> 96 #include <sys/ioctl.h> 97 #include <sys/malloc.h> 98 #include <sys/mman.h> 99 #include <sys/tty.h> 100 #include <sys/conf.h> 101 102 103 #include <machine/autoconf.h> 104 #include <machine/eeprom.h> 105 #include <machine/conf.h> 106 107 #include <dev/sun/fbio.h> 108 #include <dev/sun/fbvar.h> 109 #include <dev/sun/btreg.h> 110 #include <dev/sun/btvar.h> 111 #include <dev/sun/pfourreg.h> 112 113 /* per-display variables */ 114 struct cgeight_softc { 115 struct device sc_dev; /* base device */ 116 struct fbdevice sc_fb; /* frame buffer device */ 117 bus_space_tag_t sc_bustag; 118 bus_type_t sc_btype; /* phys address description */ 119 bus_addr_t sc_paddr; /* for device mmap() */ 120 121 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 122 union bt_cmap sc_cmap; /* Brooktree color map */ 123 }; 124 125 /* autoconfiguration driver */ 126 static void cgeightattach(struct device *, struct device *, void *); 127 static int cgeightmatch(struct device *, struct cfdata *, void *); 128 #if defined(SUN4) 129 static void cgeightunblank __P((struct device *)); 130 #endif 131 132 static int cg8_pfour_probe __P((void *, void *)); 133 134 /* cdevsw prototypes */ 135 cdev_decl(cgeight); 136 137 struct cfattach cgeight_ca = { 138 sizeof(struct cgeight_softc), cgeightmatch, cgeightattach 139 }; 140 141 extern struct cfdriver cgeight_cd; 142 143 #if defined(SUN4) 144 /* frame buffer generic driver */ 145 static struct fbdriver cgeightfbdriver = { 146 cgeightunblank, cgeightopen, cgeightclose, cgeightioctl, 147 cgeightpoll, cgeightmmap 148 }; 149 150 static void cgeightloadcmap __P((struct cgeight_softc *, int, int)); 151 static int cgeight_get_video __P((struct cgeight_softc *)); 152 static void cgeight_set_video __P((struct cgeight_softc *, int)); 153 #endif 154 155 /* 156 * Match a cgeight. 157 */ 158 int 159 cgeightmatch(parent, cf, aux) 160 struct device *parent; 161 struct cfdata *cf; 162 void *aux; 163 { 164 union obio_attach_args *uoba = aux; 165 struct obio4_attach_args *oba; 166 167 if (uoba->uoba_isobio4 == 0) 168 return (0); 169 170 oba = &uoba->uoba_oba4; 171 return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr, 172 4, /* probe size */ 173 0, /* offset */ 174 0, /* flags */ 175 cg8_pfour_probe, NULL)); 176 } 177 178 int 179 cg8_pfour_probe(vaddr, arg) 180 void *vaddr; 181 void *arg; 182 { 183 184 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24); 185 } 186 187 /* 188 * Attach a display. We need to notice if it is the console, too. 189 */ 190 void 191 cgeightattach(parent, self, aux) 192 struct device *parent, *self; 193 void *aux; 194 { 195 #if defined(SUN4) 196 union obio_attach_args *uoba = aux; 197 struct obio4_attach_args *oba = &uoba->uoba_oba4; 198 struct cgeight_softc *sc = (struct cgeight_softc *)self; 199 struct fbdevice *fb = &sc->sc_fb; 200 bus_space_handle_t bh; 201 volatile struct bt_regs *bt; 202 int ramsize, i, isconsole; 203 204 sc->sc_bustag = oba->oba_bustag; 205 sc->sc_btype = (bus_type_t)0; 206 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 207 208 /* Map the pfour register. */ 209 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 210 0, 211 sizeof(u_int32_t), 212 BUS_SPACE_MAP_LINEAR, 213 0, &bh) != 0) { 214 printf("%s: cannot map pfour register\n", self->dv_xname); 215 return; 216 } 217 fb->fb_pfour = (volatile u_int32_t *)bh; 218 219 fb->fb_driver = &cgeightfbdriver; 220 fb->fb_device = &sc->sc_dev; 221 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 222 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 223 fb->fb_flags |= FB_PFOUR; 224 225 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 226 227 fb->fb_type.fb_depth = 24; 228 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 229 230 sc->sc_fb.fb_type.fb_cmsize = 256; 231 sc->sc_fb.fb_type.fb_size = ramsize; 232 printf(": cgeight/p4, %d x %d", 233 fb->fb_type.fb_width, 234 fb->fb_type.fb_height); 235 236 isconsole = 0; 237 238 if (CPU_ISSUN4) { 239 struct eeprom *eep = (struct eeprom *)eeprom_va; 240 241 /* 242 * Assume this is the console if there's no eeprom info 243 * to be found. 244 */ 245 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 246 isconsole = fb_is_console(0); 247 } 248 249 #if 0 250 /* 251 * We don't do any of the console handling here. Instead, 252 * we let the bwtwo driver pick up the overlay plane and 253 * use it instead. Rconsole should have better performance 254 * with the 1-bit depth. 255 * -- Jason R. Thorpe <thorpej@NetBSD.ORG> 256 */ 257 258 /* 259 * When the ROM has mapped in a cgfour display, the address 260 * maps only the video RAM, so in any case we have to map the 261 * registers ourselves. We only need the video RAM if we are 262 * going to print characters via rconsole. 263 */ 264 265 if (isconsole) { 266 /* XXX this is kind of a waste */ 267 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 268 PFOUR_COLOR_OFF_OVERLAY, ramsize); 269 } 270 #endif 271 272 /* Map the Brooktree. */ 273 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 274 PFOUR_COLOR_OFF_CMAP, 275 sizeof(struct fbcontrol), 276 BUS_SPACE_MAP_LINEAR, 277 0, &bh) != 0) { 278 printf("%s: cannot map control registers\n", self->dv_xname); 279 return; 280 } 281 sc->sc_fbc = (volatile struct fbcontrol *)bh; 282 283 #if 0 /* XXX thorpej ??? */ 284 /* tell the enable plane to look at the mono image */ 285 memset(ca->ca_ra.ra_vaddr, 0xff, 286 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 287 #endif 288 289 /* grab initial (current) color map */ 290 bt = &sc->sc_fbc->fbc_dac; 291 bt->bt_addr = 0; 292 for (i = 0; i < 256 * 3 / 4; i++) 293 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 294 295 BT_INIT(bt, 0); 296 297 #if 0 /* see above */ 298 if (isconsole) { 299 printf(" (console)\n"); 300 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 301 fbrcons_init(fb); 302 #endif 303 } else 304 #endif /* 0 */ 305 printf("\n"); 306 307 /* 308 * Even though we're not using rconsole, we'd still like 309 * to notice if we're the console framebuffer. 310 */ 311 fb_attach(&sc->sc_fb, isconsole); 312 #endif 313 } 314 315 int 316 cgeightopen(dev, flags, mode, p) 317 dev_t dev; 318 int flags, mode; 319 struct proc *p; 320 { 321 int unit = minor(dev); 322 323 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 324 return (ENXIO); 325 return (0); 326 } 327 328 int 329 cgeightclose(dev, flags, mode, p) 330 dev_t dev; 331 int flags, mode; 332 struct proc *p; 333 { 334 335 return (0); 336 } 337 338 int 339 cgeightioctl(dev, cmd, data, flags, p) 340 dev_t dev; 341 u_long cmd; 342 caddr_t data; 343 int flags; 344 struct proc *p; 345 { 346 #if defined(SUN4) 347 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 348 struct fbgattr *fba; 349 int error; 350 351 switch (cmd) { 352 353 case FBIOGTYPE: 354 *(struct fbtype *)data = sc->sc_fb.fb_type; 355 break; 356 357 case FBIOGATTR: 358 fba = (struct fbgattr *)data; 359 fba->real_type = sc->sc_fb.fb_type.fb_type; 360 fba->owner = 0; /* XXX ??? */ 361 fba->fbtype = sc->sc_fb.fb_type; 362 fba->sattr.flags = 0; 363 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 364 fba->sattr.dev_specific[0] = -1; 365 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 366 fba->emu_types[1] = -1; 367 break; 368 369 case FBIOGETCMAP: 370 #define p ((struct fbcmap *)data) 371 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 372 373 case FBIOPUTCMAP: 374 /* copy to software map */ 375 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 376 if (error) 377 return (error); 378 /* now blast them into the chip */ 379 /* XXX should use retrace interrupt */ 380 cgeightloadcmap(sc, p->index, p->count); 381 #undef p 382 break; 383 384 case FBIOGVIDEO: 385 *(int *)data = cgeight_get_video(sc); 386 break; 387 388 case FBIOSVIDEO: 389 cgeight_set_video(sc, *(int *)data); 390 break; 391 392 default: 393 return (ENOTTY); 394 } 395 #endif 396 return (0); 397 } 398 399 int 400 cgeightpoll(dev, events, p) 401 dev_t dev; 402 int events; 403 struct proc *p; 404 { 405 406 return (seltrue(dev, events, p)); 407 } 408 409 /* 410 * Return the address that would map the given device at the given 411 * offset, allowing for the given protection, or return -1 for error. 412 * 413 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 414 * enable plane for 128K, followed by the colour for as long as it 415 * goes. Starting at 8MB, it maps the ramdac for NBPG, then the p4 416 * register for NBPG, then the bootrom for 0x40000. 417 */ 418 paddr_t 419 cgeightmmap(dev, off, prot) 420 dev_t dev; 421 off_t off; 422 int prot; 423 { 424 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 425 off_t poff; 426 427 #define START_ENABLE (128*1024) 428 #define START_COLOR ((128*1024) + (128*1024)) 429 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 430 sc->sc_fb.fb_type.fb_height * 3) 431 #define END_COLOR (START_COLOR + COLOR_SIZE) 432 #define START_SPECIAL 0x800000 433 #define PROMSIZE 0x40000 434 #define NOOVERLAY (0x04000000) 435 436 if (off & PGOFSET) 437 panic("cgeightmap"); 438 439 if (off < 0) 440 return (-1); 441 else if ((u_int)off >= NOOVERLAY) { 442 off -= NOOVERLAY; 443 444 /* 445 * X11 maps a huge chunk of the frame buffer; far more than 446 * there really is. We compensate by double-mapping the 447 * first page for as many other pages as it wants 448 */ 449 while ((u_int)off >= COLOR_SIZE) 450 off -= COLOR_SIZE; /* XXX thorpej ??? */ 451 452 poff = off + PFOUR_COLOR_OFF_COLOR; 453 } else if ((u_int)off < START_ENABLE) { 454 /* 455 * in overlay plane 456 */ 457 poff = PFOUR_COLOR_OFF_OVERLAY + off; 458 } else if ((u_int)off < START_COLOR) { 459 /* 460 * in enable plane 461 */ 462 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 463 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 464 /* 465 * in colour plane 466 */ 467 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 468 } else if ((u_int)off < START_SPECIAL) { 469 /* 470 * hole 471 */ 472 poff = 0; /* XXX */ 473 } else if ((u_int)off == START_SPECIAL) { 474 /* 475 * colour map (Brooktree) 476 */ 477 poff = PFOUR_COLOR_OFF_CMAP; 478 } else if ((u_int)off == START_SPECIAL + NBPG) { 479 /* 480 * p4 register 481 */ 482 poff = 0; 483 } else if ((u_int)off > (START_SPECIAL + (NBPG * 2)) && 484 (u_int) off < (START_SPECIAL + (NBPG * 2) + PROMSIZE)) { 485 /* 486 * rom 487 */ 488 poff = 0x8000 + (off - (START_SPECIAL + (NBPG * 2))); 489 } else 490 return (-1); 491 492 return (bus_space_mmap(sc->sc_bustag, 493 sc->sc_paddr, poff, 494 prot, BUS_SPACE_MAP_LINEAR)); 495 } 496 497 #if defined(SUN4) 498 /* 499 * Undo the effect of an FBIOSVIDEO that turns the video off. 500 */ 501 static void 502 cgeightunblank(dev) 503 struct device *dev; 504 { 505 506 cgeight_set_video((struct cgeight_softc *)dev, 1); 507 } 508 509 static int 510 cgeight_get_video(sc) 511 struct cgeight_softc *sc; 512 { 513 514 return (fb_pfour_get_video(&sc->sc_fb)); 515 } 516 517 static void 518 cgeight_set_video(sc, enable) 519 struct cgeight_softc *sc; 520 int enable; 521 { 522 523 fb_pfour_set_video(&sc->sc_fb, enable); 524 } 525 526 /* 527 * Load a subset of the current (new) colormap into the Brooktree DAC. 528 */ 529 static void 530 cgeightloadcmap(sc, start, ncolors) 531 register struct cgeight_softc *sc; 532 register int start, ncolors; 533 { 534 volatile struct bt_regs *bt; 535 u_int *ip; 536 int count; 537 538 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 539 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 540 bt = &sc->sc_fbc->fbc_dac; 541 bt->bt_addr = BT_D4M4(start); 542 while (--count >= 0) 543 bt->bt_cmap = *ip++; 544 } 545 #endif 546