cgfour.c revision 1.34
1 /* $NetBSD: cgfour.c,v 1.34 2003/07/15 00:04:52 lukem 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/cdefs.h> 97 __KERNEL_RCSID(0, "$NetBSD: cgfour.c,v 1.34 2003/07/15 00:04:52 lukem Exp $"); 98 99 #include <sys/param.h> 100 #include <sys/systm.h> 101 #include <sys/buf.h> 102 #include <sys/device.h> 103 #include <sys/ioctl.h> 104 #include <sys/malloc.h> 105 #include <sys/mman.h> 106 #include <sys/tty.h> 107 #include <sys/conf.h> 108 109 #include <machine/autoconf.h> 110 #include <machine/eeprom.h> 111 112 #include <dev/sun/fbio.h> 113 #include <dev/sun/fbvar.h> 114 #include <dev/sun/btreg.h> 115 #include <dev/sun/btvar.h> 116 #include <dev/sun/pfourreg.h> 117 118 /* per-display variables */ 119 struct cgfour_softc { 120 struct device sc_dev; /* base device */ 121 struct fbdevice sc_fb; /* frame buffer device */ 122 bus_space_tag_t sc_bustag; 123 bus_addr_t sc_paddr; /* phys address 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 CFATTACH_DECL(cgfour, sizeof(struct cgfour_softc), 140 cgfourmatch, cgfourattach, NULL, NULL); 141 142 extern struct cfdriver cgfour_cd; 143 144 dev_type_open(cgfouropen); 145 dev_type_ioctl(cgfourioctl); 146 dev_type_mmap(cgfourmmap); 147 148 const struct cdevsw cgfour_cdevsw = { 149 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 150 nostop, notty, nopoll, cgfourmmap, nokqfilter, 151 }; 152 153 #if defined(SUN4) 154 /* frame buffer generic driver */ 155 static struct fbdriver cgfourfbdriver = { 156 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 157 cgfourmmap, nokqfilter 158 }; 159 160 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 161 static int cgfour_get_video __P((struct cgfour_softc *)); 162 static void cgfour_set_video __P((struct cgfour_softc *, int)); 163 #endif 164 165 /* 166 * Match a cgfour. 167 */ 168 int 169 cgfourmatch(parent, cf, aux) 170 struct device *parent; 171 struct cfdata *cf; 172 void *aux; 173 { 174 union obio_attach_args *uoba = aux; 175 struct obio4_attach_args *oba; 176 177 if (uoba->uoba_isobio4 == 0) 178 return (0); 179 180 oba = &uoba->uoba_oba4; 181 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 182 4, /* probe size */ 183 0, /* offset */ 184 0, /* flags */ 185 cg4_pfour_probe, NULL)); 186 } 187 188 int 189 cg4_pfour_probe(vaddr, arg) 190 void *vaddr; 191 void *arg; 192 { 193 194 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 195 } 196 197 /* 198 * Attach a display. We need to notice if it is the console, too. 199 */ 200 void 201 cgfourattach(parent, self, aux) 202 struct device *parent, *self; 203 void *aux; 204 { 205 #if defined(SUN4) 206 struct cgfour_softc *sc = (struct cgfour_softc *)self; 207 union obio_attach_args *uoba = aux; 208 struct obio4_attach_args *oba = &uoba->uoba_oba4; 209 bus_space_handle_t bh; 210 volatile struct bt_regs *bt; 211 struct fbdevice *fb = &sc->sc_fb; 212 int ramsize, i, isconsole; 213 214 sc->sc_bustag = oba->oba_bustag; 215 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 216 217 /* Map the pfour register. */ 218 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 219 sizeof(u_int32_t), 220 BUS_SPACE_MAP_LINEAR, 221 &bh) != 0) { 222 printf("%s: cannot map control registers\n", self->dv_xname); 223 return; 224 } 225 fb->fb_pfour = (volatile u_int32_t *)bh; 226 227 fb->fb_driver = &cgfourfbdriver; 228 fb->fb_device = &sc->sc_dev; 229 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 230 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 231 fb->fb_flags |= FB_PFOUR; 232 233 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 234 235 fb->fb_type.fb_depth = 8; 236 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 237 238 fb->fb_type.fb_cmsize = 256; 239 fb->fb_type.fb_size = ramsize; 240 printf(": cgfour/p4, %d x %d", 241 fb->fb_type.fb_width, fb->fb_type.fb_height); 242 243 isconsole = 0; 244 245 if (CPU_ISSUN4) { 246 struct eeprom *eep = (struct eeprom *)eeprom_va; 247 248 /* 249 * Assume this is the console if there's no eeprom info 250 * to be found. 251 */ 252 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 253 isconsole = fb_is_console(0); 254 } 255 256 #if 0 257 /* 258 * We don't do any of the console handling here. Instead, 259 * we let the bwtwo driver pick up the overlay plane and 260 * use it instead. Rconsole should have better performance 261 * with the 1-bit depth. 262 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 263 */ 264 265 /* 266 * When the ROM has mapped in a cgfour display, the address 267 * maps only the video RAM, so in any case we have to map the 268 * registers ourselves. We only need the video RAM if we are 269 * going to print characters via rconsole. 270 */ 271 272 if (isconsole) { 273 /* XXX this is kind of a waste */ 274 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 275 PFOUR_COLOR_OFF_OVERLAY, ramsize); 276 } 277 #endif 278 279 /* Map the Brooktree. */ 280 if (bus_space_map(oba->oba_bustag, 281 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 282 sizeof(struct fbcontrol), 283 BUS_SPACE_MAP_LINEAR, 284 &bh) != 0) { 285 printf("%s: cannot map control registers\n", self->dv_xname); 286 return; 287 } 288 sc->sc_fbc = (volatile struct fbcontrol *)bh; 289 290 /* grab initial (current) color map */ 291 bt = &sc->sc_fbc->fbc_dac; 292 bt->bt_addr = 0; 293 for (i = 0; i < 256 * 3 / 4; i++) 294 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 295 296 BT_INIT(bt, 24); 297 298 #if 0 /* See above. */ 299 if (isconsole) { 300 printf(" (console)\n"); 301 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 302 fbrcons_init(fb); 303 #endif 304 } else 305 #endif /* 0 */ 306 printf("\n"); 307 308 /* 309 * Even though we're not using rconsole, we'd still like 310 * to notice if we're the console framebuffer. 311 */ 312 fb_attach(fb, isconsole); 313 #endif 314 } 315 316 int 317 cgfouropen(dev, flags, mode, p) 318 dev_t dev; 319 int flags, mode; 320 struct proc *p; 321 { 322 int unit = minor(dev); 323 324 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 325 return (ENXIO); 326 return (0); 327 } 328 329 int 330 cgfourioctl(dev, cmd, data, flags, p) 331 dev_t dev; 332 u_long cmd; 333 caddr_t data; 334 int flags; 335 struct proc *p; 336 { 337 #if defined(SUN4) 338 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 339 struct fbgattr *fba; 340 int error; 341 342 switch (cmd) { 343 344 case FBIOGTYPE: 345 *(struct fbtype *)data = sc->sc_fb.fb_type; 346 break; 347 348 case FBIOGATTR: 349 fba = (struct fbgattr *)data; 350 fba->real_type = sc->sc_fb.fb_type.fb_type; 351 fba->owner = 0; /* XXX ??? */ 352 fba->fbtype = sc->sc_fb.fb_type; 353 fba->sattr.flags = 0; 354 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 355 fba->sattr.dev_specific[0] = -1; 356 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 357 fba->emu_types[1] = -1; 358 break; 359 360 case FBIOGETCMAP: 361 #define p ((struct fbcmap *)data) 362 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 363 364 case FBIOPUTCMAP: 365 /* copy to software map */ 366 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 367 if (error) 368 return (error); 369 /* now blast them into the chip */ 370 /* XXX should use retrace interrupt */ 371 cgfourloadcmap(sc, p->index, p->count); 372 #undef p 373 break; 374 375 case FBIOGVIDEO: 376 *(int *)data = cgfour_get_video(sc); 377 break; 378 379 case FBIOSVIDEO: 380 cgfour_set_video(sc, *(int *)data); 381 break; 382 383 default: 384 return (ENOTTY); 385 } 386 #endif 387 return (0); 388 } 389 390 /* 391 * Return the address that would map the given device at the given 392 * offset, allowing for the given protection, or return -1 for error. 393 * 394 * the cg4 maps it's overlay plane for 128K, followed by the enable 395 * plane for 128K, followed by the colour plane (for as much colour 396 * as their is.) 397 * 398 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 399 * only it's colour plane, at 0. 400 */ 401 paddr_t 402 cgfourmmap(dev, off, prot) 403 dev_t dev; 404 off_t off; 405 int prot; 406 { 407 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 408 off_t poff; 409 410 #define START_ENABLE (128*1024) 411 #define START_COLOR ((128*1024) + (128*1024)) 412 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 413 sc->sc_fb.fb_type.fb_height) 414 #define END_COLOR (START_COLOR + COLOR_SIZE) 415 #define NOOVERLAY (0x04000000) 416 417 if (off & PGOFSET) 418 panic("cgfourmap"); 419 420 if (off < 0) 421 return (-1); 422 else if ((u_int)off >= NOOVERLAY) { 423 off -= NOOVERLAY; 424 425 /* 426 * X11 maps a huge chunk of the frame buffer; far more than 427 * there really is. We compensate by double-mapping the 428 * first page for as many other pages as it wants 429 */ 430 while ((u_int)off >= COLOR_SIZE) 431 off -= COLOR_SIZE; /* XXX thorpej ??? */ 432 433 poff = off + PFOUR_COLOR_OFF_COLOR; 434 } else if ((u_int)off < START_ENABLE) { 435 /* 436 * in overlay plane 437 */ 438 poff = PFOUR_COLOR_OFF_OVERLAY + off; 439 } else if ((u_int)off < START_COLOR) { 440 /* 441 * in enable plane 442 */ 443 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 444 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 445 /* 446 * in colour plane 447 */ 448 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 449 } else 450 return (-1); 451 452 return (bus_space_mmap(sc->sc_bustag, 453 sc->sc_paddr, poff, 454 prot, BUS_SPACE_MAP_LINEAR)); 455 } 456 457 #if defined(SUN4) 458 /* 459 * Undo the effect of an FBIOSVIDEO that turns the video off. 460 */ 461 static void 462 cgfourunblank(dev) 463 struct device *dev; 464 { 465 466 cgfour_set_video((struct cgfour_softc *)dev, 1); 467 } 468 469 static int 470 cgfour_get_video(sc) 471 struct cgfour_softc *sc; 472 { 473 474 return (fb_pfour_get_video(&sc->sc_fb)); 475 } 476 477 static void 478 cgfour_set_video(sc, enable) 479 struct cgfour_softc *sc; 480 int enable; 481 { 482 483 fb_pfour_set_video(&sc->sc_fb, enable); 484 } 485 486 /* 487 * Load a subset of the current (new) colormap into the Brooktree DAC. 488 */ 489 static void 490 cgfourloadcmap(sc, start, ncolors) 491 struct cgfour_softc *sc; 492 int start, ncolors; 493 { 494 volatile struct bt_regs *bt; 495 u_int *ip, i; 496 int count; 497 498 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 499 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 500 bt = &sc->sc_fbc->fbc_dac; 501 bt->bt_addr = BT_D4M4(start) << 24; 502 while (--count >= 0) { 503 i = *ip++; 504 /* hardware that makes one want to pound boards with hammers */ 505 bt->bt_cmap = i; 506 bt->bt_cmap = i << 8; 507 bt->bt_cmap = i << 16; 508 bt->bt_cmap = i << 24; 509 } 510 } 511 #endif 512
Indexes created Mon Sep 29 18:09:42 GMT 2025