cgfour.c revision 1.26
1 /* $NetBSD: cgfour.c,v 1.26 2002/03/11 16:27:01 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 <machine/autoconf.h> 107 #include <machine/eeprom.h> 108 #include <machine/conf.h> 109 110 #include <dev/sun/fbio.h> 111 #include <dev/sun/fbvar.h> 112 #include <dev/sun/btreg.h> 113 #include <dev/sun/btvar.h> 114 #include <dev/sun/pfourreg.h> 115 116 /* per-display variables */ 117 struct cgfour_softc { 118 struct device sc_dev; /* base device */ 119 struct fbdevice sc_fb; /* frame buffer device */ 120 bus_space_tag_t sc_bustag; 121 bus_addr_t sc_paddr; /* phys address for device mmap() */ 122 123 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 124 union bt_cmap sc_cmap; /* Brooktree color map */ 125 }; 126 127 /* autoconfiguration driver */ 128 static void cgfourattach __P((struct device *, struct device *, void *)); 129 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 130 131 #if defined(SUN4) 132 static void cgfourunblank __P((struct device *)); 133 #endif 134 135 static int cg4_pfour_probe __P((void *, void *)); 136 137 /* cdevsw prototypes */ 138 cdev_decl(cgfour); 139 140 struct cfattach cgfour_ca = { 141 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 142 }; 143 144 extern struct cfdriver cgfour_cd; 145 146 #if defined(SUN4) 147 /* frame buffer generic driver */ 148 static struct fbdriver cgfourfbdriver = { 149 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 150 cgfourmmap 151 }; 152 153 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 154 static int cgfour_get_video __P((struct cgfour_softc *)); 155 static void cgfour_set_video __P((struct cgfour_softc *, int)); 156 #endif 157 158 /* 159 * Match a cgfour. 160 */ 161 int 162 cgfourmatch(parent, cf, aux) 163 struct device *parent; 164 struct cfdata *cf; 165 void *aux; 166 { 167 union obio_attach_args *uoba = aux; 168 struct obio4_attach_args *oba; 169 170 if (uoba->uoba_isobio4 == 0) 171 return (0); 172 173 oba = &uoba->uoba_oba4; 174 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 175 4, /* probe size */ 176 0, /* offset */ 177 0, /* flags */ 178 cg4_pfour_probe, NULL)); 179 } 180 181 int 182 cg4_pfour_probe(vaddr, arg) 183 void *vaddr; 184 void *arg; 185 { 186 187 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 188 } 189 190 /* 191 * Attach a display. We need to notice if it is the console, too. 192 */ 193 void 194 cgfourattach(parent, self, aux) 195 struct device *parent, *self; 196 void *aux; 197 { 198 #if defined(SUN4) 199 struct cgfour_softc *sc = (struct cgfour_softc *)self; 200 union obio_attach_args *uoba = aux; 201 struct obio4_attach_args *oba = &uoba->uoba_oba4; 202 bus_space_handle_t bh; 203 volatile struct bt_regs *bt; 204 struct fbdevice *fb = &sc->sc_fb; 205 int ramsize, i, isconsole; 206 207 sc->sc_bustag = oba->oba_bustag; 208 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 209 210 /* Map the pfour register. */ 211 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 212 sizeof(u_int32_t), 213 BUS_SPACE_MAP_LINEAR, 214 &bh) != 0) { 215 printf("%s: cannot map control registers\n", self->dv_xname); 216 return; 217 } 218 fb->fb_pfour = (volatile u_int32_t *)bh; 219 220 fb->fb_driver = &cgfourfbdriver; 221 fb->fb_device = &sc->sc_dev; 222 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 223 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 224 fb->fb_flags |= FB_PFOUR; 225 226 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 227 228 fb->fb_type.fb_depth = 8; 229 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 230 231 fb->fb_type.fb_cmsize = 256; 232 fb->fb_type.fb_size = ramsize; 233 printf(": cgfour/p4, %d x %d", 234 fb->fb_type.fb_width, 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 (at) 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 (bus_space_map(oba->oba_bustag, 274 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 275 sizeof(struct fbcontrol), 276 BUS_SPACE_MAP_LINEAR, 277 &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 /* grab initial (current) color map */ 284 bt = &sc->sc_fbc->fbc_dac; 285 bt->bt_addr = 0; 286 for (i = 0; i < 256 * 3 / 4; i++) 287 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 288 289 BT_INIT(bt, 24); 290 291 #if 0 /* See above. */ 292 if (isconsole) { 293 printf(" (console)\n"); 294 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 295 fbrcons_init(fb); 296 #endif 297 } else 298 #endif /* 0 */ 299 printf("\n"); 300 301 /* 302 * Even though we're not using rconsole, we'd still like 303 * to notice if we're the console framebuffer. 304 */ 305 fb_attach(fb, isconsole); 306 #endif 307 } 308 309 int 310 cgfouropen(dev, flags, mode, p) 311 dev_t dev; 312 int flags, mode; 313 struct proc *p; 314 { 315 int unit = minor(dev); 316 317 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 318 return (ENXIO); 319 return (0); 320 } 321 322 int 323 cgfourclose(dev, flags, mode, p) 324 dev_t dev; 325 int flags, mode; 326 struct proc *p; 327 { 328 329 return (0); 330 } 331 332 int 333 cgfourioctl(dev, cmd, data, flags, p) 334 dev_t dev; 335 u_long cmd; 336 caddr_t data; 337 int flags; 338 struct proc *p; 339 { 340 #if defined(SUN4) 341 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 342 struct fbgattr *fba; 343 int error; 344 345 switch (cmd) { 346 347 case FBIOGTYPE: 348 *(struct fbtype *)data = sc->sc_fb.fb_type; 349 break; 350 351 case FBIOGATTR: 352 fba = (struct fbgattr *)data; 353 fba->real_type = sc->sc_fb.fb_type.fb_type; 354 fba->owner = 0; /* XXX ??? */ 355 fba->fbtype = sc->sc_fb.fb_type; 356 fba->sattr.flags = 0; 357 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 358 fba->sattr.dev_specific[0] = -1; 359 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 360 fba->emu_types[1] = -1; 361 break; 362 363 case FBIOGETCMAP: 364 #define p ((struct fbcmap *)data) 365 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 366 367 case FBIOPUTCMAP: 368 /* copy to software map */ 369 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 370 if (error) 371 return (error); 372 /* now blast them into the chip */ 373 /* XXX should use retrace interrupt */ 374 cgfourloadcmap(sc, p->index, p->count); 375 #undef p 376 break; 377 378 case FBIOGVIDEO: 379 *(int *)data = cgfour_get_video(sc); 380 break; 381 382 case FBIOSVIDEO: 383 cgfour_set_video(sc, *(int *)data); 384 break; 385 386 default: 387 return (ENOTTY); 388 } 389 #endif 390 return (0); 391 } 392 393 int 394 cgfourpoll(dev, events, p) 395 dev_t dev; 396 int events; 397 struct proc *p; 398 { 399 400 return (seltrue(dev, events, p)); 401 } 402 403 /* 404 * Return the address that would map the given device at the given 405 * offset, allowing for the given protection, or return -1 for error. 406 * 407 * the cg4 maps it's overlay plane for 128K, followed by the enable 408 * plane for 128K, followed by the colour plane (for as much colour 409 * as their is.) 410 * 411 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 412 * only it's colour plane, at 0. 413 */ 414 paddr_t 415 cgfourmmap(dev, off, prot) 416 dev_t dev; 417 off_t off; 418 int prot; 419 { 420 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 421 off_t poff; 422 423 #define START_ENABLE (128*1024) 424 #define START_COLOR ((128*1024) + (128*1024)) 425 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 426 sc->sc_fb.fb_type.fb_height) 427 #define END_COLOR (START_COLOR + COLOR_SIZE) 428 #define NOOVERLAY (0x04000000) 429 430 if (off & PGOFSET) 431 panic("cgfourmap"); 432 433 if (off < 0) 434 return (-1); 435 else if ((u_int)off >= NOOVERLAY) { 436 off -= NOOVERLAY; 437 438 /* 439 * X11 maps a huge chunk of the frame buffer; far more than 440 * there really is. We compensate by double-mapping the 441 * first page for as many other pages as it wants 442 */ 443 while ((u_int)off >= COLOR_SIZE) 444 off -= COLOR_SIZE; /* XXX thorpej ??? */ 445 446 poff = off + PFOUR_COLOR_OFF_COLOR; 447 } else if ((u_int)off < START_ENABLE) { 448 /* 449 * in overlay plane 450 */ 451 poff = PFOUR_COLOR_OFF_OVERLAY + off; 452 } else if ((u_int)off < START_COLOR) { 453 /* 454 * in enable plane 455 */ 456 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 457 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 458 /* 459 * in colour plane 460 */ 461 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 462 } else 463 return (-1); 464 465 return (bus_space_mmap(sc->sc_bustag, 466 sc->sc_paddr, poff, 467 prot, BUS_SPACE_MAP_LINEAR)); 468 } 469 470 #if defined(SUN4) 471 /* 472 * Undo the effect of an FBIOSVIDEO that turns the video off. 473 */ 474 static void 475 cgfourunblank(dev) 476 struct device *dev; 477 { 478 479 cgfour_set_video((struct cgfour_softc *)dev, 1); 480 } 481 482 static int 483 cgfour_get_video(sc) 484 struct cgfour_softc *sc; 485 { 486 487 return (fb_pfour_get_video(&sc->sc_fb)); 488 } 489 490 static void 491 cgfour_set_video(sc, enable) 492 struct cgfour_softc *sc; 493 int enable; 494 { 495 496 fb_pfour_set_video(&sc->sc_fb, enable); 497 } 498 499 /* 500 * Load a subset of the current (new) colormap into the Brooktree DAC. 501 */ 502 static void 503 cgfourloadcmap(sc, start, ncolors) 504 struct cgfour_softc *sc; 505 int start, ncolors; 506 { 507 volatile struct bt_regs *bt; 508 u_int *ip, i; 509 int count; 510 511 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 512 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 513 bt = &sc->sc_fbc->fbc_dac; 514 bt->bt_addr = BT_D4M4(start) << 24; 515 while (--count >= 0) { 516 i = *ip++; 517 /* hardware that makes one want to pound boards with hammers */ 518 bt->bt_cmap = i; 519 bt->bt_cmap = i << 8; 520 bt->bt_cmap = i << 16; 521 bt->bt_cmap = i << 24; 522 } 523 } 524 #endif 525
Indexes created Tue Sep 30 11:09:46 GMT 2025