cgfour.c revision 1.20
1 /* $NetBSD: cgfour.c,v 1.20 2000/03/19 15:38:45 pk 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 bus_space_tag_t sc_bustag; 124 bus_type_t sc_btype; /* phys address description */ 125 bus_addr_t sc_paddr; /* for device mmap() */ 126 127 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 128 union bt_cmap sc_cmap; /* Brooktree color map */ 129 }; 130 131 /* autoconfiguration driver */ 132 static void cgfourattach __P((struct device *, struct device *, void *)); 133 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 134 135 #if defined(SUN4) 136 static void cgfourunblank __P((struct device *)); 137 #endif 138 139 static int cg4_pfour_probe __P((void *, void *)); 140 141 /* cdevsw prototypes */ 142 cdev_decl(cgfour); 143 144 struct cfattach cgfour_ca = { 145 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 146 }; 147 148 extern struct cfdriver cgfour_cd; 149 150 #if defined(SUN4) 151 /* frame buffer generic driver */ 152 static struct fbdriver cgfourfbdriver = { 153 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 154 cgfourmmap 155 }; 156 157 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 158 static int cgfour_get_video __P((struct cgfour_softc *)); 159 static void cgfour_set_video __P((struct cgfour_softc *, int)); 160 #endif 161 162 /* 163 * Match a cgfour. 164 */ 165 int 166 cgfourmatch(parent, cf, aux) 167 struct device *parent; 168 struct cfdata *cf; 169 void *aux; 170 { 171 union obio_attach_args *uoba = aux; 172 struct obio4_attach_args *oba; 173 174 if (uoba->uoba_isobio4 == 0) 175 return (0); 176 177 oba = &uoba->uoba_oba4; 178 return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr, 179 4, /* probe size */ 180 0, /* offset */ 181 0, /* flags */ 182 cg4_pfour_probe, NULL)); 183 } 184 185 int 186 cg4_pfour_probe(vaddr, arg) 187 void *vaddr; 188 void *arg; 189 { 190 191 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 192 } 193 194 /* 195 * Attach a display. We need to notice if it is the console, too. 196 */ 197 void 198 cgfourattach(parent, self, aux) 199 struct device *parent, *self; 200 void *aux; 201 { 202 #if defined(SUN4) 203 struct cgfour_softc *sc = (struct cgfour_softc *)self; 204 union obio_attach_args *uoba = aux; 205 struct obio4_attach_args *oba = &uoba->uoba_oba4; 206 bus_space_handle_t bh; 207 volatile struct bt_regs *bt; 208 struct fbdevice *fb = &sc->sc_fb; 209 int ramsize, i, isconsole; 210 211 sc->sc_bustag = oba->oba_bustag; 212 sc->sc_btype = (bus_type_t)0; 213 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 214 215 /* Map the pfour register. */ 216 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 217 0, 218 sizeof(u_int32_t), 219 BUS_SPACE_MAP_LINEAR, 220 0, &bh) != 0) { 221 printf("%s: cannot map control registers\n", self->dv_xname); 222 return; 223 } 224 fb->fb_pfour = (volatile u_int32_t *)bh; 225 226 fb->fb_driver = &cgfourfbdriver; 227 fb->fb_device = &sc->sc_dev; 228 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 229 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 230 fb->fb_flags |= FB_PFOUR; 231 232 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 233 234 fb->fb_type.fb_depth = 8; 235 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 236 237 fb->fb_type.fb_cmsize = 256; 238 fb->fb_type.fb_size = ramsize; 239 printf(": cgfour/p4, %d x %d", 240 fb->fb_type.fb_width, fb->fb_type.fb_height); 241 242 isconsole = 0; 243 244 if (CPU_ISSUN4) { 245 struct eeprom *eep = (struct eeprom *)eeprom_va; 246 247 /* 248 * Assume this is the console if there's no eeprom info 249 * to be found. 250 */ 251 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 252 isconsole = fb_is_console(0); 253 } 254 255 #if 0 256 /* 257 * We don't do any of the console handling here. Instead, 258 * we let the bwtwo driver pick up the overlay plane and 259 * use it instead. Rconsole should have better performance 260 * with the 1-bit depth. 261 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 262 */ 263 264 /* 265 * When the ROM has mapped in a cgfour display, the address 266 * maps only the video RAM, so in any case we have to map the 267 * registers ourselves. We only need the video RAM if we are 268 * going to print characters via rconsole. 269 */ 270 271 if (isconsole) { 272 /* XXX this is kind of a waste */ 273 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 274 PFOUR_COLOR_OFF_OVERLAY, ramsize); 275 } 276 #endif 277 278 /* Map the Brooktree. */ 279 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 280 PFOUR_COLOR_OFF_CMAP, 281 sizeof(struct fbcontrol), 282 BUS_SPACE_MAP_LINEAR, 283 0, &bh) != 0) { 284 printf("%s: cannot map control registers\n", self->dv_xname); 285 return; 286 } 287 sc->sc_fbc = (volatile struct fbcontrol *)bh; 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 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 294 295 BT_INIT(bt, 24); 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(fb, isconsole); 312 #endif 313 } 314 315 int 316 cgfouropen(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 >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 324 return (ENXIO); 325 return (0); 326 } 327 328 int 329 cgfourclose(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 cgfourioctl(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 cgfour_softc *sc = cgfour_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 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 371 372 case FBIOPUTCMAP: 373 /* copy to software map */ 374 #define p ((struct fbcmap *)data) 375 error = bt_putcmap(p, &sc->sc_cmap, 256); 376 if (error) 377 return (error); 378 /* now blast them into the chip */ 379 /* XXX should use retrace interrupt */ 380 cgfourloadcmap(sc, p->index, p->count); 381 #undef p 382 break; 383 384 case FBIOGVIDEO: 385 *(int *)data = cgfour_get_video(sc); 386 break; 387 388 case FBIOSVIDEO: 389 cgfour_set_video(sc, *(int *)data); 390 break; 391 392 default: 393 return (ENOTTY); 394 } 395 #endif 396 return (0); 397 } 398 399 int 400 cgfourpoll(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 cg4 maps it's overlay plane for 128K, followed by the enable 414 * plane for 128K, followed by the colour plane (for as much colour 415 * as their is.) 416 * 417 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 418 * only it's colour plane, at 0. 419 */ 420 int 421 cgfourmmap(dev, off, prot) 422 dev_t dev; 423 int off, prot; 424 { 425 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 426 bus_space_handle_t bh; 427 int poff; 428 429 #define START_ENABLE (128*1024) 430 #define START_COLOR ((128*1024) + (128*1024)) 431 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 432 sc->sc_fb.fb_type.fb_height) 433 #define END_COLOR (START_COLOR + COLOR_SIZE) 434 #define NOOVERLAY (0x04000000) 435 436 if (off & PGOFSET) 437 panic("cgfourmap"); 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 469 return (-1); 470 471 if (bus_space_mmap(sc->sc_bustag, 472 sc->sc_btype, 473 sc->sc_paddr + poff, 474 BUS_SPACE_MAP_LINEAR, &bh)) 475 return (-1); 476 477 return ((int)bh); 478 } 479 480 #if defined(SUN4) 481 /* 482 * Undo the effect of an FBIOSVIDEO that turns the video off. 483 */ 484 static void 485 cgfourunblank(dev) 486 struct device *dev; 487 { 488 489 cgfour_set_video((struct cgfour_softc *)dev, 1); 490 } 491 492 static int 493 cgfour_get_video(sc) 494 struct cgfour_softc *sc; 495 { 496 497 return (fb_pfour_get_video(&sc->sc_fb)); 498 } 499 500 static void 501 cgfour_set_video(sc, enable) 502 struct cgfour_softc *sc; 503 int enable; 504 { 505 506 fb_pfour_set_video(&sc->sc_fb, enable); 507 } 508 509 /* 510 * Load a subset of the current (new) colormap into the Brooktree DAC. 511 */ 512 static void 513 cgfourloadcmap(sc, start, ncolors) 514 struct cgfour_softc *sc; 515 int start, ncolors; 516 { 517 volatile struct bt_regs *bt; 518 u_int *ip, i; 519 int count; 520 521 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 522 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 523 bt = &sc->sc_fbc->fbc_dac; 524 bt->bt_addr = BT_D4M4(start) << 24; 525 while (--count >= 0) { 526 i = *ip++; 527 /* hardware that makes one want to pound boards with hammers */ 528 bt->bt_cmap = i; 529 bt->bt_cmap = i << 8; 530 bt->bt_cmap = i << 16; 531 bt->bt_cmap = i << 24; 532 } 533 } 534 #endif 535
Indexes created Mon Sep 29 21:09:56 GMT 2025