cgeight.c revision 1.32
1 /* $NetBSD: cgeight.c,v 1.32 2003/04/02 04:35:26 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 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 #include <uvm/uvm_extern.h> 103 104 #include <machine/autoconf.h> 105 #include <machine/eeprom.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_addr_t sc_paddr; /* phys address for device mmap() */ 119 120 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 121 union bt_cmap sc_cmap; /* Brooktree color map */ 122 }; 123 124 /* autoconfiguration driver */ 125 static void cgeightattach(struct device *, struct device *, void *); 126 static int cgeightmatch(struct device *, struct cfdata *, void *); 127 #if defined(SUN4) 128 static void cgeightunblank __P((struct device *)); 129 #endif 130 131 static int cg8_pfour_probe __P((void *, void *)); 132 133 CFATTACH_DECL(cgeight, sizeof(struct cgeight_softc), 134 cgeightmatch, cgeightattach, NULL, NULL); 135 136 extern struct cfdriver cgeight_cd; 137 138 dev_type_open(cgeightopen); 139 dev_type_ioctl(cgeightioctl); 140 dev_type_mmap(cgeightmmap); 141 142 const struct cdevsw cgeight_cdevsw = { 143 cgeightopen, nullclose, noread, nowrite, cgeightioctl, 144 nostop, notty, nopoll, cgeightmmap, nokqfilter 145 }; 146 147 #if defined(SUN4) 148 /* frame buffer generic driver */ 149 static struct fbdriver cgeightfbdriver = { 150 cgeightunblank, cgeightopen, nullclose, cgeightioctl, 151 nopoll, cgeightmmap, nokqfilter 152 }; 153 154 static void cgeightloadcmap __P((struct cgeight_softc *, int, int)); 155 static int cgeight_get_video __P((struct cgeight_softc *)); 156 static void cgeight_set_video __P((struct cgeight_softc *, int)); 157 #endif 158 159 /* 160 * Match a cgeight. 161 */ 162 int 163 cgeightmatch(parent, cf, aux) 164 struct device *parent; 165 struct cfdata *cf; 166 void *aux; 167 { 168 union obio_attach_args *uoba = aux; 169 struct obio4_attach_args *oba; 170 171 if (uoba->uoba_isobio4 == 0) 172 return (0); 173 174 oba = &uoba->uoba_oba4; 175 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 176 4, /* probe size */ 177 0, /* offset */ 178 0, /* flags */ 179 cg8_pfour_probe, NULL)); 180 } 181 182 int 183 cg8_pfour_probe(vaddr, arg) 184 void *vaddr; 185 void *arg; 186 { 187 188 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24); 189 } 190 191 /* 192 * Attach a display. We need to notice if it is the console, too. 193 */ 194 void 195 cgeightattach(parent, self, aux) 196 struct device *parent, *self; 197 void *aux; 198 { 199 #if defined(SUN4) 200 union obio_attach_args *uoba = aux; 201 struct obio4_attach_args *oba = &uoba->uoba_oba4; 202 struct cgeight_softc *sc = (struct cgeight_softc *)self; 203 struct fbdevice *fb = &sc->sc_fb; 204 bus_space_handle_t bh; 205 volatile struct bt_regs *bt; 206 int ramsize, i, isconsole; 207 208 sc->sc_bustag = oba->oba_bustag; 209 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 210 211 /* Map the pfour register. */ 212 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 213 sizeof(u_int32_t), 214 BUS_SPACE_MAP_LINEAR, 215 &bh) != 0) { 216 printf("%s: cannot map pfour register\n", self->dv_xname); 217 return; 218 } 219 fb->fb_pfour = (volatile u_int32_t *)bh; 220 221 fb->fb_driver = &cgeightfbdriver; 222 fb->fb_device = &sc->sc_dev; 223 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 224 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 225 fb->fb_flags |= FB_PFOUR; 226 227 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 228 229 fb->fb_type.fb_depth = 24; 230 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 231 232 sc->sc_fb.fb_type.fb_cmsize = 256; 233 sc->sc_fb.fb_type.fb_size = ramsize; 234 printf(": cgeight/p4, %d x %d", 235 fb->fb_type.fb_width, 236 fb->fb_type.fb_height); 237 238 isconsole = 0; 239 240 if (CPU_ISSUN4) { 241 struct eeprom *eep = (struct eeprom *)eeprom_va; 242 243 /* 244 * Assume this is the console if there's no eeprom info 245 * to be found. 246 */ 247 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 248 isconsole = fb_is_console(0); 249 } 250 251 #if 0 252 /* 253 * We don't do any of the console handling here. Instead, 254 * we let the bwtwo driver pick up the overlay plane and 255 * use it instead. Rconsole should have better performance 256 * with the 1-bit depth. 257 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 258 */ 259 260 /* 261 * When the ROM has mapped in a cgfour display, the address 262 * maps only the video RAM, so in any case we have to map the 263 * registers ourselves. We only need the video RAM if we are 264 * going to print characters via rconsole. 265 */ 266 267 if (isconsole) { 268 /* XXX this is kind of a waste */ 269 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 270 PFOUR_COLOR_OFF_OVERLAY, ramsize); 271 } 272 #endif 273 274 /* Map the Brooktree. */ 275 if (bus_space_map(oba->oba_bustag, 276 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 277 sizeof(struct fbcontrol), 278 BUS_SPACE_MAP_LINEAR, 279 &bh) != 0) { 280 printf("%s: cannot map control registers\n", self->dv_xname); 281 return; 282 } 283 sc->sc_fbc = (volatile struct fbcontrol *)bh; 284 285 #if 0 /* XXX thorpej ??? */ 286 /* tell the enable plane to look at the mono image */ 287 memset(ca->ca_ra.ra_vaddr, 0xff, 288 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 289 #endif 290 291 /* grab initial (current) color map */ 292 bt = &sc->sc_fbc->fbc_dac; 293 bt->bt_addr = 0; 294 for (i = 0; i < 256 * 3 / 4; i++) 295 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 296 297 BT_INIT(bt, 0); 298 299 #if 0 /* see above */ 300 if (isconsole) { 301 printf(" (console)\n"); 302 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 303 fbrcons_init(fb); 304 #endif 305 } else 306 #endif /* 0 */ 307 printf("\n"); 308 309 /* 310 * Even though we're not using rconsole, we'd still like 311 * to notice if we're the console framebuffer. 312 */ 313 fb_attach(&sc->sc_fb, isconsole); 314 #endif 315 } 316 317 int 318 cgeightopen(dev, flags, mode, p) 319 dev_t dev; 320 int flags, mode; 321 struct proc *p; 322 { 323 int unit = minor(dev); 324 325 if (unit >= cgeight_cd.cd_ndevs || cgeight_cd.cd_devs[unit] == NULL) 326 return (ENXIO); 327 return (0); 328 } 329 330 int 331 cgeightioctl(dev, cmd, data, flags, p) 332 dev_t dev; 333 u_long cmd; 334 caddr_t data; 335 int flags; 336 struct proc *p; 337 { 338 #if defined(SUN4) 339 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 340 struct fbgattr *fba; 341 int error; 342 343 switch (cmd) { 344 345 case FBIOGTYPE: 346 *(struct fbtype *)data = sc->sc_fb.fb_type; 347 break; 348 349 case FBIOGATTR: 350 fba = (struct fbgattr *)data; 351 fba->real_type = sc->sc_fb.fb_type.fb_type; 352 fba->owner = 0; /* XXX ??? */ 353 fba->fbtype = sc->sc_fb.fb_type; 354 fba->sattr.flags = 0; 355 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 356 fba->sattr.dev_specific[0] = -1; 357 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 358 fba->emu_types[1] = -1; 359 break; 360 361 case FBIOGETCMAP: 362 #define p ((struct fbcmap *)data) 363 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 364 365 case FBIOPUTCMAP: 366 /* copy to software map */ 367 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 368 if (error) 369 return (error); 370 /* now blast them into the chip */ 371 /* XXX should use retrace interrupt */ 372 cgeightloadcmap(sc, p->index, p->count); 373 #undef p 374 break; 375 376 case FBIOGVIDEO: 377 *(int *)data = cgeight_get_video(sc); 378 break; 379 380 case FBIOSVIDEO: 381 cgeight_set_video(sc, *(int *)data); 382 break; 383 384 default: 385 return (ENOTTY); 386 } 387 #endif 388 return (0); 389 } 390 391 /* 392 * Return the address that would map the given device at the given 393 * offset, allowing for the given protection, or return -1 for error. 394 * 395 * The cg8 maps it's overlay plane at 0 for 128K, followed by the 396 * enable plane for 128K, followed by the colour for as long as it 397 * goes. Starting at 8MB, it maps the ramdac for PAGE_SIZE, then the p4 398 * register for PAGE_SIZE, then the bootrom for 0x40000. 399 */ 400 paddr_t 401 cgeightmmap(dev, off, prot) 402 dev_t dev; 403 off_t off; 404 int prot; 405 { 406 struct cgeight_softc *sc = cgeight_cd.cd_devs[minor(dev)]; 407 off_t poff; 408 409 #define START_ENABLE (128*1024) 410 #define START_COLOR ((128*1024) + (128*1024)) 411 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 412 sc->sc_fb.fb_type.fb_height * 3) 413 #define END_COLOR (START_COLOR + COLOR_SIZE) 414 #define START_SPECIAL 0x800000 415 #define PROMSIZE 0x40000 416 #define NOOVERLAY (0x04000000) 417 418 if (off & PGOFSET) 419 panic("cgeightmap"); 420 421 if (off < 0) 422 return (-1); 423 else if ((u_int)off >= NOOVERLAY) { 424 off -= NOOVERLAY; 425 426 /* 427 * X11 maps a huge chunk of the frame buffer; far more than 428 * there really is. We compensate by double-mapping the 429 * first page for as many other pages as it wants 430 */ 431 while ((u_int)off >= COLOR_SIZE) 432 off -= COLOR_SIZE; /* XXX thorpej ??? */ 433 434 poff = off + PFOUR_COLOR_OFF_COLOR; 435 } else if ((u_int)off < START_ENABLE) { 436 /* 437 * in overlay plane 438 */ 439 poff = PFOUR_COLOR_OFF_OVERLAY + off; 440 } else if ((u_int)off < START_COLOR) { 441 /* 442 * in enable plane 443 */ 444 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 445 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 446 /* 447 * in colour plane 448 */ 449 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 450 } else if ((u_int)off < START_SPECIAL) { 451 /* 452 * hole 453 */ 454 poff = 0; /* XXX */ 455 } else if ((u_int)off == START_SPECIAL) { 456 /* 457 * colour map (Brooktree) 458 */ 459 poff = PFOUR_COLOR_OFF_CMAP; 460 } else if ((u_int)off == START_SPECIAL + PAGE_SIZE) { 461 /* 462 * p4 register 463 */ 464 poff = 0; 465 } else if ((u_int)off > (START_SPECIAL + (PAGE_SIZE * 2)) && 466 (u_int) off < (START_SPECIAL + (PAGE_SIZE * 2) + PROMSIZE)) { 467 /* 468 * rom 469 */ 470 poff = 0x8000 + (off - (START_SPECIAL + (PAGE_SIZE * 2))); 471 } else 472 return (-1); 473 474 return (bus_space_mmap(sc->sc_bustag, 475 sc->sc_paddr, poff, 476 prot, BUS_SPACE_MAP_LINEAR)); 477 } 478 479 #if defined(SUN4) 480 /* 481 * Undo the effect of an FBIOSVIDEO that turns the video off. 482 */ 483 static void 484 cgeightunblank(dev) 485 struct device *dev; 486 { 487 488 cgeight_set_video((struct cgeight_softc *)dev, 1); 489 } 490 491 static int 492 cgeight_get_video(sc) 493 struct cgeight_softc *sc; 494 { 495 496 return (fb_pfour_get_video(&sc->sc_fb)); 497 } 498 499 static void 500 cgeight_set_video(sc, enable) 501 struct cgeight_softc *sc; 502 int enable; 503 { 504 505 fb_pfour_set_video(&sc->sc_fb, enable); 506 } 507 508 /* 509 * Load a subset of the current (new) colormap into the Brooktree DAC. 510 */ 511 static void 512 cgeightloadcmap(sc, start, ncolors) 513 register struct cgeight_softc *sc; 514 register int start, ncolors; 515 { 516 volatile struct bt_regs *bt; 517 u_int *ip; 518 int count; 519 520 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 521 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 522 bt = &sc->sc_fbc->fbc_dac; 523 bt->bt_addr = BT_D4M4(start); 524 while (--count >= 0) 525 bt->bt_cmap = *ip++; 526 } 527 #endif 528
Indexes created Mon Sep 29 21:09:56 GMT 2025