cgfour.c revision 1.24
1 /* $NetBSD: cgfour.c,v 1.24 2000/08/22 21:28:30 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_type_t sc_btype; /* phys address description */ 122 bus_addr_t sc_paddr; /* for device mmap() */ 123 124 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 125 union bt_cmap sc_cmap; /* Brooktree color map */ 126 }; 127 128 /* autoconfiguration driver */ 129 static void cgfourattach __P((struct device *, struct device *, void *)); 130 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 131 132 #if defined(SUN4) 133 static void cgfourunblank __P((struct device *)); 134 #endif 135 136 static int cg4_pfour_probe __P((void *, void *)); 137 138 /* cdevsw prototypes */ 139 cdev_decl(cgfour); 140 141 struct cfattach cgfour_ca = { 142 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 143 }; 144 145 extern struct cfdriver cgfour_cd; 146 147 #if defined(SUN4) 148 /* frame buffer generic driver */ 149 static struct fbdriver cgfourfbdriver = { 150 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 151 cgfourmmap 152 }; 153 154 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 155 static int cgfour_get_video __P((struct cgfour_softc *)); 156 static void cgfour_set_video __P((struct cgfour_softc *, int)); 157 #endif 158 159 /* 160 * Match a cgfour. 161 */ 162 int 163 cgfourmatch(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, 0, oba->oba_paddr, 176 4, /* probe size */ 177 0, /* offset */ 178 0, /* flags */ 179 cg4_pfour_probe, NULL)); 180 } 181 182 int 183 cg4_pfour_probe(vaddr, arg) 184 void *vaddr; 185 void *arg; 186 { 187 188 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 189 } 190 191 /* 192 * Attach a display. We need to notice if it is the console, too. 193 */ 194 void 195 cgfourattach(parent, self, aux) 196 struct device *parent, *self; 197 void *aux; 198 { 199 #if defined(SUN4) 200 struct cgfour_softc *sc = (struct cgfour_softc *)self; 201 union obio_attach_args *uoba = aux; 202 struct obio4_attach_args *oba = &uoba->uoba_oba4; 203 bus_space_handle_t bh; 204 volatile struct bt_regs *bt; 205 struct fbdevice *fb = &sc->sc_fb; 206 int ramsize, i, isconsole; 207 208 sc->sc_bustag = oba->oba_bustag; 209 sc->sc_btype = (bus_type_t)0; 210 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 211 212 /* Map the pfour register. */ 213 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 214 0, 215 sizeof(u_int32_t), 216 BUS_SPACE_MAP_LINEAR, 217 0, &bh) != 0) { 218 printf("%s: cannot map control registers\n", self->dv_xname); 219 return; 220 } 221 fb->fb_pfour = (volatile u_int32_t *)bh; 222 223 fb->fb_driver = &cgfourfbdriver; 224 fb->fb_device = &sc->sc_dev; 225 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 226 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 227 fb->fb_flags |= FB_PFOUR; 228 229 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 230 231 fb->fb_type.fb_depth = 8; 232 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 233 234 fb->fb_type.fb_cmsize = 256; 235 fb->fb_type.fb_size = ramsize; 236 printf(": cgfour/p4, %d x %d", 237 fb->fb_type.fb_width, fb->fb_type.fb_height); 238 239 isconsole = 0; 240 241 if (CPU_ISSUN4) { 242 struct eeprom *eep = (struct eeprom *)eeprom_va; 243 244 /* 245 * Assume this is the console if there's no eeprom info 246 * to be found. 247 */ 248 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 249 isconsole = fb_is_console(0); 250 } 251 252 #if 0 253 /* 254 * We don't do any of the console handling here. Instead, 255 * we let the bwtwo driver pick up the overlay plane and 256 * use it instead. Rconsole should have better performance 257 * with the 1-bit depth. 258 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 259 */ 260 261 /* 262 * When the ROM has mapped in a cgfour display, the address 263 * maps only the video RAM, so in any case we have to map the 264 * registers ourselves. We only need the video RAM if we are 265 * going to print characters via rconsole. 266 */ 267 268 if (isconsole) { 269 /* XXX this is kind of a waste */ 270 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 271 PFOUR_COLOR_OFF_OVERLAY, ramsize); 272 } 273 #endif 274 275 /* Map the Brooktree. */ 276 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 277 PFOUR_COLOR_OFF_CMAP, 278 sizeof(struct fbcontrol), 279 BUS_SPACE_MAP_LINEAR, 280 0, &bh) != 0) { 281 printf("%s: cannot map control registers\n", self->dv_xname); 282 return; 283 } 284 sc->sc_fbc = (volatile struct fbcontrol *)bh; 285 286 /* grab initial (current) color map */ 287 bt = &sc->sc_fbc->fbc_dac; 288 bt->bt_addr = 0; 289 for (i = 0; i < 256 * 3 / 4; i++) 290 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 291 292 BT_INIT(bt, 24); 293 294 #if 0 /* See above. */ 295 if (isconsole) { 296 printf(" (console)\n"); 297 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 298 fbrcons_init(fb); 299 #endif 300 } else 301 #endif /* 0 */ 302 printf("\n"); 303 304 /* 305 * Even though we're not using rconsole, we'd still like 306 * to notice if we're the console framebuffer. 307 */ 308 fb_attach(fb, isconsole); 309 #endif 310 } 311 312 int 313 cgfouropen(dev, flags, mode, p) 314 dev_t dev; 315 int flags, mode; 316 struct proc *p; 317 { 318 int unit = minor(dev); 319 320 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 321 return (ENXIO); 322 return (0); 323 } 324 325 int 326 cgfourclose(dev, flags, mode, p) 327 dev_t dev; 328 int flags, mode; 329 struct proc *p; 330 { 331 332 return (0); 333 } 334 335 int 336 cgfourioctl(dev, cmd, data, flags, p) 337 dev_t dev; 338 u_long cmd; 339 caddr_t data; 340 int flags; 341 struct proc *p; 342 { 343 #if defined(SUN4) 344 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 345 struct fbgattr *fba; 346 int error; 347 348 switch (cmd) { 349 350 case FBIOGTYPE: 351 *(struct fbtype *)data = sc->sc_fb.fb_type; 352 break; 353 354 case FBIOGATTR: 355 fba = (struct fbgattr *)data; 356 fba->real_type = sc->sc_fb.fb_type.fb_type; 357 fba->owner = 0; /* XXX ??? */ 358 fba->fbtype = sc->sc_fb.fb_type; 359 fba->sattr.flags = 0; 360 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 361 fba->sattr.dev_specific[0] = -1; 362 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 363 fba->emu_types[1] = -1; 364 break; 365 366 case FBIOGETCMAP: 367 #define p ((struct fbcmap *)data) 368 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 369 370 case FBIOPUTCMAP: 371 /* copy to software map */ 372 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 373 if (error) 374 return (error); 375 /* now blast them into the chip */ 376 /* XXX should use retrace interrupt */ 377 cgfourloadcmap(sc, p->index, p->count); 378 #undef p 379 break; 380 381 case FBIOGVIDEO: 382 *(int *)data = cgfour_get_video(sc); 383 break; 384 385 case FBIOSVIDEO: 386 cgfour_set_video(sc, *(int *)data); 387 break; 388 389 default: 390 return (ENOTTY); 391 } 392 #endif 393 return (0); 394 } 395 396 int 397 cgfourpoll(dev, events, p) 398 dev_t dev; 399 int events; 400 struct proc *p; 401 { 402 403 return (seltrue(dev, events, p)); 404 } 405 406 /* 407 * Return the address that would map the given device at the given 408 * offset, allowing for the given protection, or return -1 for error. 409 * 410 * the cg4 maps it's overlay plane for 128K, followed by the enable 411 * plane for 128K, followed by the colour plane (for as much colour 412 * as their is.) 413 * 414 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 415 * only it's colour plane, at 0. 416 */ 417 paddr_t 418 cgfourmmap(dev, off, prot) 419 dev_t dev; 420 off_t off; 421 int prot; 422 { 423 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 424 bus_space_handle_t bh; 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) 431 #define END_COLOR (START_COLOR + COLOR_SIZE) 432 #define NOOVERLAY (0x04000000) 433 434 if (off & PGOFSET) 435 panic("cgfourmap"); 436 437 if (off < 0) 438 return (-1); 439 else if ((u_int)off >= NOOVERLAY) { 440 off -= NOOVERLAY; 441 442 /* 443 * X11 maps a huge chunk of the frame buffer; far more than 444 * there really is. We compensate by double-mapping the 445 * first page for as many other pages as it wants 446 */ 447 while ((u_int)off >= COLOR_SIZE) 448 off -= COLOR_SIZE; /* XXX thorpej ??? */ 449 450 poff = off + PFOUR_COLOR_OFF_COLOR; 451 } else if ((u_int)off < START_ENABLE) { 452 /* 453 * in overlay plane 454 */ 455 poff = PFOUR_COLOR_OFF_OVERLAY + off; 456 } else if ((u_int)off < START_COLOR) { 457 /* 458 * in enable plane 459 */ 460 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 461 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 462 /* 463 * in colour plane 464 */ 465 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 466 } else 467 return (-1); 468 469 if (bus_space_mmap(sc->sc_bustag, 470 sc->sc_btype, 471 sc->sc_paddr + poff, 472 BUS_SPACE_MAP_LINEAR, &bh)) 473 return (-1); 474 475 return ((paddr_t)bh); 476 } 477 478 #if defined(SUN4) 479 /* 480 * Undo the effect of an FBIOSVIDEO that turns the video off. 481 */ 482 static void 483 cgfourunblank(dev) 484 struct device *dev; 485 { 486 487 cgfour_set_video((struct cgfour_softc *)dev, 1); 488 } 489 490 static int 491 cgfour_get_video(sc) 492 struct cgfour_softc *sc; 493 { 494 495 return (fb_pfour_get_video(&sc->sc_fb)); 496 } 497 498 static void 499 cgfour_set_video(sc, enable) 500 struct cgfour_softc *sc; 501 int enable; 502 { 503 504 fb_pfour_set_video(&sc->sc_fb, enable); 505 } 506 507 /* 508 * Load a subset of the current (new) colormap into the Brooktree DAC. 509 */ 510 static void 511 cgfourloadcmap(sc, start, ncolors) 512 struct cgfour_softc *sc; 513 int start, ncolors; 514 { 515 volatile struct bt_regs *bt; 516 u_int *ip, i; 517 int count; 518 519 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 520 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 521 bt = &sc->sc_fbc->fbc_dac; 522 bt->bt_addr = BT_D4M4(start) << 24; 523 while (--count >= 0) { 524 i = *ip++; 525 /* hardware that makes one want to pound boards with hammers */ 526 bt->bt_cmap = i; 527 bt->bt_cmap = i << 8; 528 bt->bt_cmap = i << 16; 529 bt->bt_cmap = i << 24; 530 } 531 } 532 #endif 533
Indexes created Tue Sep 30 10:09:55 GMT 2025