cgfour.c revision 1.35
1 /* $NetBSD: cgfour.c,v 1.35 2003/08/07 16:29:34 agc 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) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This software was developed by the Computer Systems Engineering group 44 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 45 * contributed to Berkeley. 46 * 47 * All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Lawrence Berkeley Laboratory. 51 * 52 * Redistribution and use in source and binary forms, with or without 53 * modification, are permitted provided that the following conditions 54 * are met: 55 * 1. Redistributions of source code must retain the above copyright 56 * notice, this list of conditions and the following disclaimer. 57 * 2. Redistributions in binary form must reproduce the above copyright 58 * notice, this list of conditions and the following disclaimer in the 59 * documentation and/or other materials provided with the distribution. 60 * 3. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 77 */ 78 79 /* 80 * Copyright (c) 1995 Theo de Raadt. All rights reserved. 81 * 82 * All advertising materials mentioning features or use of this software 83 * must display the following acknowledgement: 84 * This product includes software developed by Theo de Raadt. 85 * 86 * This software was developed by the Computer Systems Engineering group 87 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 88 * contributed to Berkeley. 89 * 90 * All advertising materials mentioning features or use of this software 91 * must display the following acknowledgement: 92 * This product includes software developed by the University of 93 * California, Lawrence Berkeley Laboratory. 94 * 95 * Redistribution and use in source and binary forms, with or without 96 * modification, are permitted provided that the following conditions 97 * are met: 98 * 1. Redistributions of source code must retain the above copyright 99 * notice, this list of conditions and the following disclaimer. 100 * 2. Redistributions in binary form must reproduce the above copyright 101 * notice, this list of conditions and the following disclaimer in the 102 * documentation and/or other materials provided with the distribution. 103 * 3. All advertising materials mentioning features or use of this software 104 * must display the following acknowledgement: 105 * This product includes software developed by the University of 106 * California, Berkeley and its contributors. 107 * 4. Neither the name of the University nor the names of its contributors 108 * may be used to endorse or promote products derived from this software 109 * without specific prior written permission. 110 * 111 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 112 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 113 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 114 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 115 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 116 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 117 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 118 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 119 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 120 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 121 * SUCH DAMAGE. 122 * 123 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 124 */ 125 126 /* 127 * color display (cgfour) driver. 128 * 129 * Does not handle interrupts, even though they can occur. 130 * 131 * XXX should defer colormap updates to vertical retrace interrupts 132 */ 133 134 #include <sys/cdefs.h> 135 __KERNEL_RCSID(0, "$NetBSD: cgfour.c,v 1.35 2003/08/07 16:29:34 agc Exp $"); 136 137 #include <sys/param.h> 138 #include <sys/systm.h> 139 #include <sys/buf.h> 140 #include <sys/device.h> 141 #include <sys/ioctl.h> 142 #include <sys/malloc.h> 143 #include <sys/mman.h> 144 #include <sys/tty.h> 145 #include <sys/conf.h> 146 147 #include <machine/autoconf.h> 148 #include <machine/eeprom.h> 149 150 #include <dev/sun/fbio.h> 151 #include <dev/sun/fbvar.h> 152 #include <dev/sun/btreg.h> 153 #include <dev/sun/btvar.h> 154 #include <dev/sun/pfourreg.h> 155 156 /* per-display variables */ 157 struct cgfour_softc { 158 struct device sc_dev; /* base device */ 159 struct fbdevice sc_fb; /* frame buffer device */ 160 bus_space_tag_t sc_bustag; 161 bus_addr_t sc_paddr; /* phys address for device mmap() */ 162 163 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 164 union bt_cmap sc_cmap; /* Brooktree color map */ 165 }; 166 167 /* autoconfiguration driver */ 168 static void cgfourattach __P((struct device *, struct device *, void *)); 169 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 170 171 #if defined(SUN4) 172 static void cgfourunblank __P((struct device *)); 173 #endif 174 175 static int cg4_pfour_probe __P((void *, void *)); 176 177 CFATTACH_DECL(cgfour, sizeof(struct cgfour_softc), 178 cgfourmatch, cgfourattach, NULL, NULL); 179 180 extern struct cfdriver cgfour_cd; 181 182 dev_type_open(cgfouropen); 183 dev_type_ioctl(cgfourioctl); 184 dev_type_mmap(cgfourmmap); 185 186 const struct cdevsw cgfour_cdevsw = { 187 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 188 nostop, notty, nopoll, cgfourmmap, nokqfilter, 189 }; 190 191 #if defined(SUN4) 192 /* frame buffer generic driver */ 193 static struct fbdriver cgfourfbdriver = { 194 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 195 cgfourmmap, nokqfilter 196 }; 197 198 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 199 static int cgfour_get_video __P((struct cgfour_softc *)); 200 static void cgfour_set_video __P((struct cgfour_softc *, int)); 201 #endif 202 203 /* 204 * Match a cgfour. 205 */ 206 int 207 cgfourmatch(parent, cf, aux) 208 struct device *parent; 209 struct cfdata *cf; 210 void *aux; 211 { 212 union obio_attach_args *uoba = aux; 213 struct obio4_attach_args *oba; 214 215 if (uoba->uoba_isobio4 == 0) 216 return (0); 217 218 oba = &uoba->uoba_oba4; 219 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 220 4, /* probe size */ 221 0, /* offset */ 222 0, /* flags */ 223 cg4_pfour_probe, NULL)); 224 } 225 226 int 227 cg4_pfour_probe(vaddr, arg) 228 void *vaddr; 229 void *arg; 230 { 231 232 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 233 } 234 235 /* 236 * Attach a display. We need to notice if it is the console, too. 237 */ 238 void 239 cgfourattach(parent, self, aux) 240 struct device *parent, *self; 241 void *aux; 242 { 243 #if defined(SUN4) 244 struct cgfour_softc *sc = (struct cgfour_softc *)self; 245 union obio_attach_args *uoba = aux; 246 struct obio4_attach_args *oba = &uoba->uoba_oba4; 247 bus_space_handle_t bh; 248 volatile struct bt_regs *bt; 249 struct fbdevice *fb = &sc->sc_fb; 250 int ramsize, i, isconsole; 251 252 sc->sc_bustag = oba->oba_bustag; 253 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 254 255 /* Map the pfour register. */ 256 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 257 sizeof(u_int32_t), 258 BUS_SPACE_MAP_LINEAR, 259 &bh) != 0) { 260 printf("%s: cannot map control registers\n", self->dv_xname); 261 return; 262 } 263 fb->fb_pfour = (volatile u_int32_t *)bh; 264 265 fb->fb_driver = &cgfourfbdriver; 266 fb->fb_device = &sc->sc_dev; 267 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 268 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 269 fb->fb_flags |= FB_PFOUR; 270 271 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 272 273 fb->fb_type.fb_depth = 8; 274 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 275 276 fb->fb_type.fb_cmsize = 256; 277 fb->fb_type.fb_size = ramsize; 278 printf(": cgfour/p4, %d x %d", 279 fb->fb_type.fb_width, fb->fb_type.fb_height); 280 281 isconsole = 0; 282 283 if (CPU_ISSUN4) { 284 struct eeprom *eep = (struct eeprom *)eeprom_va; 285 286 /* 287 * Assume this is the console if there's no eeprom info 288 * to be found. 289 */ 290 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 291 isconsole = fb_is_console(0); 292 } 293 294 #if 0 295 /* 296 * We don't do any of the console handling here. Instead, 297 * we let the bwtwo driver pick up the overlay plane and 298 * use it instead. Rconsole should have better performance 299 * with the 1-bit depth. 300 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 301 */ 302 303 /* 304 * When the ROM has mapped in a cgfour display, the address 305 * maps only the video RAM, so in any case we have to map the 306 * registers ourselves. We only need the video RAM if we are 307 * going to print characters via rconsole. 308 */ 309 310 if (isconsole) { 311 /* XXX this is kind of a waste */ 312 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 313 PFOUR_COLOR_OFF_OVERLAY, ramsize); 314 } 315 #endif 316 317 /* Map the Brooktree. */ 318 if (bus_space_map(oba->oba_bustag, 319 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 320 sizeof(struct fbcontrol), 321 BUS_SPACE_MAP_LINEAR, 322 &bh) != 0) { 323 printf("%s: cannot map control registers\n", self->dv_xname); 324 return; 325 } 326 sc->sc_fbc = (volatile struct fbcontrol *)bh; 327 328 /* grab initial (current) color map */ 329 bt = &sc->sc_fbc->fbc_dac; 330 bt->bt_addr = 0; 331 for (i = 0; i < 256 * 3 / 4; i++) 332 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 333 334 BT_INIT(bt, 24); 335 336 #if 0 /* See above. */ 337 if (isconsole) { 338 printf(" (console)\n"); 339 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 340 fbrcons_init(fb); 341 #endif 342 } else 343 #endif /* 0 */ 344 printf("\n"); 345 346 /* 347 * Even though we're not using rconsole, we'd still like 348 * to notice if we're the console framebuffer. 349 */ 350 fb_attach(fb, isconsole); 351 #endif 352 } 353 354 int 355 cgfouropen(dev, flags, mode, p) 356 dev_t dev; 357 int flags, mode; 358 struct proc *p; 359 { 360 int unit = minor(dev); 361 362 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 363 return (ENXIO); 364 return (0); 365 } 366 367 int 368 cgfourioctl(dev, cmd, data, flags, p) 369 dev_t dev; 370 u_long cmd; 371 caddr_t data; 372 int flags; 373 struct proc *p; 374 { 375 #if defined(SUN4) 376 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 377 struct fbgattr *fba; 378 int error; 379 380 switch (cmd) { 381 382 case FBIOGTYPE: 383 *(struct fbtype *)data = sc->sc_fb.fb_type; 384 break; 385 386 case FBIOGATTR: 387 fba = (struct fbgattr *)data; 388 fba->real_type = sc->sc_fb.fb_type.fb_type; 389 fba->owner = 0; /* XXX ??? */ 390 fba->fbtype = sc->sc_fb.fb_type; 391 fba->sattr.flags = 0; 392 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 393 fba->sattr.dev_specific[0] = -1; 394 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 395 fba->emu_types[1] = -1; 396 break; 397 398 case FBIOGETCMAP: 399 #define p ((struct fbcmap *)data) 400 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 401 402 case FBIOPUTCMAP: 403 /* copy to software map */ 404 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 405 if (error) 406 return (error); 407 /* now blast them into the chip */ 408 /* XXX should use retrace interrupt */ 409 cgfourloadcmap(sc, p->index, p->count); 410 #undef p 411 break; 412 413 case FBIOGVIDEO: 414 *(int *)data = cgfour_get_video(sc); 415 break; 416 417 case FBIOSVIDEO: 418 cgfour_set_video(sc, *(int *)data); 419 break; 420 421 default: 422 return (ENOTTY); 423 } 424 #endif 425 return (0); 426 } 427 428 /* 429 * Return the address that would map the given device at the given 430 * offset, allowing for the given protection, or return -1 for error. 431 * 432 * the cg4 maps it's overlay plane for 128K, followed by the enable 433 * plane for 128K, followed by the colour plane (for as much colour 434 * as their is.) 435 * 436 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 437 * only it's colour plane, at 0. 438 */ 439 paddr_t 440 cgfourmmap(dev, off, prot) 441 dev_t dev; 442 off_t off; 443 int prot; 444 { 445 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 446 off_t poff; 447 448 #define START_ENABLE (128*1024) 449 #define START_COLOR ((128*1024) + (128*1024)) 450 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 451 sc->sc_fb.fb_type.fb_height) 452 #define END_COLOR (START_COLOR + COLOR_SIZE) 453 #define NOOVERLAY (0x04000000) 454 455 if (off & PGOFSET) 456 panic("cgfourmap"); 457 458 if (off < 0) 459 return (-1); 460 else if ((u_int)off >= NOOVERLAY) { 461 off -= NOOVERLAY; 462 463 /* 464 * X11 maps a huge chunk of the frame buffer; far more than 465 * there really is. We compensate by double-mapping the 466 * first page for as many other pages as it wants 467 */ 468 while ((u_int)off >= COLOR_SIZE) 469 off -= COLOR_SIZE; /* XXX thorpej ??? */ 470 471 poff = off + PFOUR_COLOR_OFF_COLOR; 472 } else if ((u_int)off < START_ENABLE) { 473 /* 474 * in overlay plane 475 */ 476 poff = PFOUR_COLOR_OFF_OVERLAY + off; 477 } else if ((u_int)off < START_COLOR) { 478 /* 479 * in enable plane 480 */ 481 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 482 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 483 /* 484 * in colour plane 485 */ 486 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 487 } else 488 return (-1); 489 490 return (bus_space_mmap(sc->sc_bustag, 491 sc->sc_paddr, poff, 492 prot, BUS_SPACE_MAP_LINEAR)); 493 } 494 495 #if defined(SUN4) 496 /* 497 * Undo the effect of an FBIOSVIDEO that turns the video off. 498 */ 499 static void 500 cgfourunblank(dev) 501 struct device *dev; 502 { 503 504 cgfour_set_video((struct cgfour_softc *)dev, 1); 505 } 506 507 static int 508 cgfour_get_video(sc) 509 struct cgfour_softc *sc; 510 { 511 512 return (fb_pfour_get_video(&sc->sc_fb)); 513 } 514 515 static void 516 cgfour_set_video(sc, enable) 517 struct cgfour_softc *sc; 518 int enable; 519 { 520 521 fb_pfour_set_video(&sc->sc_fb, enable); 522 } 523 524 /* 525 * Load a subset of the current (new) colormap into the Brooktree DAC. 526 */ 527 static void 528 cgfourloadcmap(sc, start, ncolors) 529 struct cgfour_softc *sc; 530 int start, ncolors; 531 { 532 volatile struct bt_regs *bt; 533 u_int *ip, i; 534 int count; 535 536 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 537 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 538 bt = &sc->sc_fbc->fbc_dac; 539 bt->bt_addr = BT_D4M4(start) << 24; 540 while (--count >= 0) { 541 i = *ip++; 542 /* hardware that makes one want to pound boards with hammers */ 543 bt->bt_cmap = i; 544 bt->bt_cmap = i << 8; 545 bt->bt_cmap = i << 16; 546 bt->bt_cmap = i << 24; 547 } 548 } 549 #endif 550
Indexes created Mon Sep 29 21:09:56 GMT 2025