cgfour.c revision 1.23
1 /* $NetBSD: cgfour.c,v 1.23 2000/06/29 07:40:06 mrg 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> 105 106 107 #include <machine/fbio.h> 108 #include <machine/autoconf.h> 109 #include <machine/fbvar.h> 110 #include <machine/eeprom.h> 111 #include <machine/conf.h> 112 113 #include <sparc/dev/btreg.h> 114 #include <sparc/dev/btvar.h> 115 #include <sparc/dev/pfourreg.h> 116 117 /* per-display variables */ 118 struct cgfour_softc { 119 struct device sc_dev; /* base device */ 120 struct fbdevice sc_fb; /* frame buffer device */ 121 bus_space_tag_t sc_bustag; 122 bus_type_t sc_btype; /* phys address description */ 123 bus_addr_t sc_paddr; /* for device mmap() */ 124 125 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 126 union bt_cmap sc_cmap; /* Brooktree color map */ 127 }; 128 129 /* autoconfiguration driver */ 130 static void cgfourattach __P((struct device *, struct device *, void *)); 131 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 132 133 #if defined(SUN4) 134 static void cgfourunblank __P((struct device *)); 135 #endif 136 137 static int cg4_pfour_probe __P((void *, void *)); 138 139 /* cdevsw prototypes */ 140 cdev_decl(cgfour); 141 142 struct cfattach cgfour_ca = { 143 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 144 }; 145 146 extern struct cfdriver cgfour_cd; 147 148 #if defined(SUN4) 149 /* frame buffer generic driver */ 150 static struct fbdriver cgfourfbdriver = { 151 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 152 cgfourmmap 153 }; 154 155 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 156 static int cgfour_get_video __P((struct cgfour_softc *)); 157 static void cgfour_set_video __P((struct cgfour_softc *, int)); 158 #endif 159 160 /* 161 * Match a cgfour. 162 */ 163 int 164 cgfourmatch(parent, cf, aux) 165 struct device *parent; 166 struct cfdata *cf; 167 void *aux; 168 { 169 union obio_attach_args *uoba = aux; 170 struct obio4_attach_args *oba; 171 172 if (uoba->uoba_isobio4 == 0) 173 return (0); 174 175 oba = &uoba->uoba_oba4; 176 return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr, 177 4, /* probe size */ 178 0, /* offset */ 179 0, /* flags */ 180 cg4_pfour_probe, NULL)); 181 } 182 183 int 184 cg4_pfour_probe(vaddr, arg) 185 void *vaddr; 186 void *arg; 187 { 188 189 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 190 } 191 192 /* 193 * Attach a display. We need to notice if it is the console, too. 194 */ 195 void 196 cgfourattach(parent, self, aux) 197 struct device *parent, *self; 198 void *aux; 199 { 200 #if defined(SUN4) 201 struct cgfour_softc *sc = (struct cgfour_softc *)self; 202 union obio_attach_args *uoba = aux; 203 struct obio4_attach_args *oba = &uoba->uoba_oba4; 204 bus_space_handle_t bh; 205 volatile struct bt_regs *bt; 206 struct fbdevice *fb = &sc->sc_fb; 207 int ramsize, i, isconsole; 208 209 sc->sc_bustag = oba->oba_bustag; 210 sc->sc_btype = (bus_type_t)0; 211 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 212 213 /* Map the pfour register. */ 214 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 215 0, 216 sizeof(u_int32_t), 217 BUS_SPACE_MAP_LINEAR, 218 0, &bh) != 0) { 219 printf("%s: cannot map control registers\n", self->dv_xname); 220 return; 221 } 222 fb->fb_pfour = (volatile u_int32_t *)bh; 223 224 fb->fb_driver = &cgfourfbdriver; 225 fb->fb_device = &sc->sc_dev; 226 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 227 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 228 fb->fb_flags |= FB_PFOUR; 229 230 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 231 232 fb->fb_type.fb_depth = 8; 233 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 234 235 fb->fb_type.fb_cmsize = 256; 236 fb->fb_type.fb_size = ramsize; 237 printf(": cgfour/p4, %d x %d", 238 fb->fb_type.fb_width, fb->fb_type.fb_height); 239 240 isconsole = 0; 241 242 if (CPU_ISSUN4) { 243 struct eeprom *eep = (struct eeprom *)eeprom_va; 244 245 /* 246 * Assume this is the console if there's no eeprom info 247 * to be found. 248 */ 249 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 250 isconsole = fb_is_console(0); 251 } 252 253 #if 0 254 /* 255 * We don't do any of the console handling here. Instead, 256 * we let the bwtwo driver pick up the overlay plane and 257 * use it instead. Rconsole should have better performance 258 * with the 1-bit depth. 259 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 260 */ 261 262 /* 263 * When the ROM has mapped in a cgfour display, the address 264 * maps only the video RAM, so in any case we have to map the 265 * registers ourselves. We only need the video RAM if we are 266 * going to print characters via rconsole. 267 */ 268 269 if (isconsole) { 270 /* XXX this is kind of a waste */ 271 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 272 PFOUR_COLOR_OFF_OVERLAY, ramsize); 273 } 274 #endif 275 276 /* Map the Brooktree. */ 277 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 278 PFOUR_COLOR_OFF_CMAP, 279 sizeof(struct fbcontrol), 280 BUS_SPACE_MAP_LINEAR, 281 0, &bh) != 0) { 282 printf("%s: cannot map control registers\n", self->dv_xname); 283 return; 284 } 285 sc->sc_fbc = (volatile struct fbcontrol *)bh; 286 287 /* grab initial (current) color map */ 288 bt = &sc->sc_fbc->fbc_dac; 289 bt->bt_addr = 0; 290 for (i = 0; i < 256 * 3 / 4; i++) 291 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 292 293 BT_INIT(bt, 24); 294 295 #if 0 /* See above. */ 296 if (isconsole) { 297 printf(" (console)\n"); 298 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 299 fbrcons_init(fb); 300 #endif 301 } else 302 #endif /* 0 */ 303 printf("\n"); 304 305 /* 306 * Even though we're not using rconsole, we'd still like 307 * to notice if we're the console framebuffer. 308 */ 309 fb_attach(fb, isconsole); 310 #endif 311 } 312 313 int 314 cgfouropen(dev, flags, mode, p) 315 dev_t dev; 316 int flags, mode; 317 struct proc *p; 318 { 319 int unit = minor(dev); 320 321 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 322 return (ENXIO); 323 return (0); 324 } 325 326 int 327 cgfourclose(dev, flags, mode, p) 328 dev_t dev; 329 int flags, mode; 330 struct proc *p; 331 { 332 333 return (0); 334 } 335 336 int 337 cgfourioctl(dev, cmd, data, flags, p) 338 dev_t dev; 339 u_long cmd; 340 caddr_t data; 341 int flags; 342 struct proc *p; 343 { 344 #if defined(SUN4) 345 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 346 struct fbgattr *fba; 347 int error; 348 349 switch (cmd) { 350 351 case FBIOGTYPE: 352 *(struct fbtype *)data = sc->sc_fb.fb_type; 353 break; 354 355 case FBIOGATTR: 356 fba = (struct fbgattr *)data; 357 fba->real_type = sc->sc_fb.fb_type.fb_type; 358 fba->owner = 0; /* XXX ??? */ 359 fba->fbtype = sc->sc_fb.fb_type; 360 fba->sattr.flags = 0; 361 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 362 fba->sattr.dev_specific[0] = -1; 363 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 364 fba->emu_types[1] = -1; 365 break; 366 367 case FBIOGETCMAP: 368 #define p ((struct fbcmap *)data) 369 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 370 371 case FBIOPUTCMAP: 372 /* copy to software map */ 373 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 374 if (error) 375 return (error); 376 /* now blast them into the chip */ 377 /* XXX should use retrace interrupt */ 378 cgfourloadcmap(sc, p->index, p->count); 379 #undef p 380 break; 381 382 case FBIOGVIDEO: 383 *(int *)data = cgfour_get_video(sc); 384 break; 385 386 case FBIOSVIDEO: 387 cgfour_set_video(sc, *(int *)data); 388 break; 389 390 default: 391 return (ENOTTY); 392 } 393 #endif 394 return (0); 395 } 396 397 int 398 cgfourpoll(dev, events, p) 399 dev_t dev; 400 int events; 401 struct proc *p; 402 { 403 404 return (seltrue(dev, events, p)); 405 } 406 407 /* 408 * Return the address that would map the given device at the given 409 * offset, allowing for the given protection, or return -1 for error. 410 * 411 * the cg4 maps it's overlay plane for 128K, followed by the enable 412 * plane for 128K, followed by the colour plane (for as much colour 413 * as their is.) 414 * 415 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 416 * only it's colour plane, at 0. 417 */ 418 paddr_t 419 cgfourmmap(dev, off, prot) 420 dev_t dev; 421 off_t off; 422 int prot; 423 { 424 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 425 bus_space_handle_t bh; 426 off_t poff; 427 428 #define START_ENABLE (128*1024) 429 #define START_COLOR ((128*1024) + (128*1024)) 430 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 431 sc->sc_fb.fb_type.fb_height) 432 #define END_COLOR (START_COLOR + COLOR_SIZE) 433 #define NOOVERLAY (0x04000000) 434 435 if (off & PGOFSET) 436 panic("cgfourmap"); 437 438 if (off < 0) 439 return (-1); 440 else if ((u_int)off >= NOOVERLAY) { 441 off -= NOOVERLAY; 442 443 /* 444 * X11 maps a huge chunk of the frame buffer; far more than 445 * there really is. We compensate by double-mapping the 446 * first page for as many other pages as it wants 447 */ 448 while ((u_int)off >= COLOR_SIZE) 449 off -= COLOR_SIZE; /* XXX thorpej ??? */ 450 451 poff = off + PFOUR_COLOR_OFF_COLOR; 452 } else if ((u_int)off < START_ENABLE) { 453 /* 454 * in overlay plane 455 */ 456 poff = PFOUR_COLOR_OFF_OVERLAY + off; 457 } else if ((u_int)off < START_COLOR) { 458 /* 459 * in enable plane 460 */ 461 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 462 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 463 /* 464 * in colour plane 465 */ 466 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 467 } else 468 return (-1); 469 470 if (bus_space_mmap(sc->sc_bustag, 471 sc->sc_btype, 472 sc->sc_paddr + poff, 473 BUS_SPACE_MAP_LINEAR, &bh)) 474 return (-1); 475 476 return ((paddr_t)bh); 477 } 478 479 #if defined(SUN4) 480 /* 481 * Undo the effect of an FBIOSVIDEO that turns the video off. 482 */ 483 static void 484 cgfourunblank(dev) 485 struct device *dev; 486 { 487 488 cgfour_set_video((struct cgfour_softc *)dev, 1); 489 } 490 491 static int 492 cgfour_get_video(sc) 493 struct cgfour_softc *sc; 494 { 495 496 return (fb_pfour_get_video(&sc->sc_fb)); 497 } 498 499 static void 500 cgfour_set_video(sc, enable) 501 struct cgfour_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 cgfourloadcmap(sc, start, ncolors) 513 struct cgfour_softc *sc; 514 int start, ncolors; 515 { 516 volatile struct bt_regs *bt; 517 u_int *ip, i; 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) << 24; 524 while (--count >= 0) { 525 i = *ip++; 526 /* hardware that makes one want to pound boards with hammers */ 527 bt->bt_cmap = i; 528 bt->bt_cmap = i << 8; 529 bt->bt_cmap = i << 16; 530 bt->bt_cmap = i << 24; 531 } 532 } 533 #endif 534
Indexes created Thu Oct 02 14:10:14 GMT 2025