cgfour.c revision 1.32
1 /* $NetBSD: cgfour.c,v 1.32 2003/06/29 09:56:24 darrenr 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> 108 109 #include <dev/sun/fbio.h> 110 #include <dev/sun/fbvar.h> 111 #include <dev/sun/btreg.h> 112 #include <dev/sun/btvar.h> 113 #include <dev/sun/pfourreg.h> 114 115 /* per-display variables */ 116 struct cgfour_softc { 117 struct device sc_dev; /* base device */ 118 struct fbdevice sc_fb; /* frame buffer device */ 119 bus_space_tag_t sc_bustag; 120 bus_addr_t sc_paddr; /* phys address for device mmap() */ 121 122 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 123 union bt_cmap sc_cmap; /* Brooktree color map */ 124 }; 125 126 /* autoconfiguration driver */ 127 static void cgfourattach __P((struct device *, struct device *, void *)); 128 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 129 130 #if defined(SUN4) 131 static void cgfourunblank __P((struct device *)); 132 #endif 133 134 static int cg4_pfour_probe __P((void *, void *)); 135 136 CFATTACH_DECL(cgfour, sizeof(struct cgfour_softc), 137 cgfourmatch, cgfourattach, NULL, NULL); 138 139 extern struct cfdriver cgfour_cd; 140 141 dev_type_open(cgfouropen); 142 dev_type_ioctl(cgfourioctl); 143 dev_type_mmap(cgfourmmap); 144 145 const struct cdevsw cgfour_cdevsw = { 146 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 147 nostop, notty, nopoll, cgfourmmap, nokqfilter, 148 }; 149 150 #if defined(SUN4) 151 /* frame buffer generic driver */ 152 static struct fbdriver cgfourfbdriver = { 153 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 154 cgfourmmap, nokqfilter 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, 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_paddr = (bus_addr_t)oba->oba_paddr; 213 214 /* Map the pfour register. */ 215 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 216 sizeof(u_int32_t), 217 BUS_SPACE_MAP_LINEAR, 218 &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 (bus_space_map(oba->oba_bustag, 278 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 279 sizeof(struct fbcontrol), 280 BUS_SPACE_MAP_LINEAR, 281 &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, l) 315 dev_t dev; 316 int flags, mode; 317 struct lwp *l; 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 cgfourioctl(dev, cmd, data, flags, l) 328 dev_t dev; 329 u_long cmd; 330 caddr_t data; 331 int flags; 332 struct lwp *l; 333 { 334 #if defined(SUN4) 335 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 336 struct fbgattr *fba; 337 int error; 338 339 switch (cmd) { 340 341 case FBIOGTYPE: 342 *(struct fbtype *)data = sc->sc_fb.fb_type; 343 break; 344 345 case FBIOGATTR: 346 fba = (struct fbgattr *)data; 347 fba->real_type = sc->sc_fb.fb_type.fb_type; 348 fba->owner = 0; /* XXX ??? */ 349 fba->fbtype = sc->sc_fb.fb_type; 350 fba->sattr.flags = 0; 351 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 352 fba->sattr.dev_specific[0] = -1; 353 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 354 fba->emu_types[1] = -1; 355 break; 356 357 case FBIOGETCMAP: 358 #define p ((struct fbcmap *)data) 359 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 360 361 case FBIOPUTCMAP: 362 /* copy to software map */ 363 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 364 if (error) 365 return (error); 366 /* now blast them into the chip */ 367 /* XXX should use retrace interrupt */ 368 cgfourloadcmap(sc, p->index, p->count); 369 #undef p 370 break; 371 372 case FBIOGVIDEO: 373 *(int *)data = cgfour_get_video(sc); 374 break; 375 376 case FBIOSVIDEO: 377 cgfour_set_video(sc, *(int *)data); 378 break; 379 380 default: 381 return (ENOTTY); 382 } 383 #endif 384 return (0); 385 } 386 387 /* 388 * Return the address that would map the given device at the given 389 * offset, allowing for the given protection, or return -1 for error. 390 * 391 * the cg4 maps it's overlay plane for 128K, followed by the enable 392 * plane for 128K, followed by the colour plane (for as much colour 393 * as their is.) 394 * 395 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 396 * only it's colour plane, at 0. 397 */ 398 paddr_t 399 cgfourmmap(dev, off, prot) 400 dev_t dev; 401 off_t off; 402 int prot; 403 { 404 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 405 off_t poff; 406 407 #define START_ENABLE (128*1024) 408 #define START_COLOR ((128*1024) + (128*1024)) 409 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 410 sc->sc_fb.fb_type.fb_height) 411 #define END_COLOR (START_COLOR + COLOR_SIZE) 412 #define NOOVERLAY (0x04000000) 413 414 if (off & PGOFSET) 415 panic("cgfourmap"); 416 417 if (off < 0) 418 return (-1); 419 else if ((u_int)off >= NOOVERLAY) { 420 off -= NOOVERLAY; 421 422 /* 423 * X11 maps a huge chunk of the frame buffer; far more than 424 * there really is. We compensate by double-mapping the 425 * first page for as many other pages as it wants 426 */ 427 while ((u_int)off >= COLOR_SIZE) 428 off -= COLOR_SIZE; /* XXX thorpej ??? */ 429 430 poff = off + PFOUR_COLOR_OFF_COLOR; 431 } else if ((u_int)off < START_ENABLE) { 432 /* 433 * in overlay plane 434 */ 435 poff = PFOUR_COLOR_OFF_OVERLAY + off; 436 } else if ((u_int)off < START_COLOR) { 437 /* 438 * in enable plane 439 */ 440 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 441 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 442 /* 443 * in colour plane 444 */ 445 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 446 } else 447 return (-1); 448 449 return (bus_space_mmap(sc->sc_bustag, 450 sc->sc_paddr, poff, 451 prot, BUS_SPACE_MAP_LINEAR)); 452 } 453 454 #if defined(SUN4) 455 /* 456 * Undo the effect of an FBIOSVIDEO that turns the video off. 457 */ 458 static void 459 cgfourunblank(dev) 460 struct device *dev; 461 { 462 463 cgfour_set_video((struct cgfour_softc *)dev, 1); 464 } 465 466 static int 467 cgfour_get_video(sc) 468 struct cgfour_softc *sc; 469 { 470 471 return (fb_pfour_get_video(&sc->sc_fb)); 472 } 473 474 static void 475 cgfour_set_video(sc, enable) 476 struct cgfour_softc *sc; 477 int enable; 478 { 479 480 fb_pfour_set_video(&sc->sc_fb, enable); 481 } 482 483 /* 484 * Load a subset of the current (new) colormap into the Brooktree DAC. 485 */ 486 static void 487 cgfourloadcmap(sc, start, ncolors) 488 struct cgfour_softc *sc; 489 int start, ncolors; 490 { 491 volatile struct bt_regs *bt; 492 u_int *ip, i; 493 int count; 494 495 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 496 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 497 bt = &sc->sc_fbc->fbc_dac; 498 bt->bt_addr = BT_D4M4(start) << 24; 499 while (--count >= 0) { 500 i = *ip++; 501 /* hardware that makes one want to pound boards with hammers */ 502 bt->bt_cmap = i; 503 bt->bt_cmap = i << 8; 504 bt->bt_cmap = i << 16; 505 bt->bt_cmap = i << 24; 506 } 507 } 508 #endif 509
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