cgfour.c revision 1.18
1 /* $NetBSD: cgfour.c,v 1.18 1998/04/07 20:18:18 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 <vm/vm.h> 107 108 #include <machine/fbio.h> 109 #include <machine/autoconf.h> 110 #include <machine/pmap.h> 111 #include <machine/fbvar.h> 112 #include <machine/eeprom.h> 113 #include <machine/conf.h> 114 115 #include <sparc/dev/btreg.h> 116 #include <sparc/dev/btvar.h> 117 #include <sparc/dev/pfourreg.h> 118 119 /* per-display variables */ 120 struct cgfour_softc { 121 struct device sc_dev; /* base device */ 122 struct fbdevice sc_fb; /* frame buffer device */ 123 bus_space_tag_t sc_bustag; 124 bus_type_t sc_btype; /* phys address description */ 125 bus_addr_t sc_paddr; /* for device mmap() */ 126 127 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 128 union bt_cmap sc_cmap; /* Brooktree color map */ 129 }; 130 131 /* autoconfiguration driver */ 132 static void cgfourattach __P((struct device *, struct device *, void *)); 133 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 134 135 #if defined(SUN4) 136 static void cgfourunblank __P((struct device *)); 137 #endif 138 139 static int cg4_pfour_probe __P((void *, void *)); 140 141 /* cdevsw prototypes */ 142 cdev_decl(cgfour); 143 144 struct cfattach cgfour_ca = { 145 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 146 }; 147 148 extern struct cfdriver cgfour_cd; 149 150 #if defined(SUN4) 151 /* frame buffer generic driver */ 152 static struct fbdriver cgfourfbdriver = { 153 cgfourunblank, cgfouropen, cgfourclose, cgfourioctl, cgfourpoll, 154 cgfourmmap 155 }; 156 157 extern int fbnode; 158 extern struct tty *fbconstty; 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, 0, 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_btype = (bus_type_t)0; 216 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 217 218 /* Map the pfour register. */ 219 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 220 0, 221 sizeof(u_int32_t), 222 BUS_SPACE_MAP_LINEAR, 223 0, &bh) != 0) { 224 printf("%s: cannot map control registers\n", self->dv_xname); 225 return; 226 } 227 fb->fb_pfour = (volatile u_int32_t *)bh; 228 229 fb->fb_driver = &cgfourfbdriver; 230 fb->fb_device = &sc->sc_dev; 231 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 232 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 233 fb->fb_flags |= FB_PFOUR; 234 235 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 236 237 fb->fb_type.fb_depth = 8; 238 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 239 240 fb->fb_type.fb_cmsize = 256; 241 fb->fb_type.fb_size = ramsize; 242 printf(": cgfour/p4, %d x %d", 243 fb->fb_type.fb_width, fb->fb_type.fb_height); 244 245 isconsole = 0; 246 247 if (CPU_ISSUN4) { 248 struct eeprom *eep = (struct eeprom *)eeprom_va; 249 250 /* 251 * Assume this is the console if there's no eeprom info 252 * to be found. 253 */ 254 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 255 isconsole = (fbconstty != NULL); 256 } 257 258 #if 0 259 /* 260 * We don't do any of the console handling here. Instead, 261 * we let the bwtwo driver pick up the overlay plane and 262 * use it instead. Rconsole should have better performance 263 * with the 1-bit depth. 264 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 265 */ 266 267 /* 268 * When the ROM has mapped in a cgfour display, the address 269 * maps only the video RAM, so in any case we have to map the 270 * registers ourselves. We only need the video RAM if we are 271 * going to print characters via rconsole. 272 */ 273 274 if (isconsole) { 275 /* XXX this is kind of a waste */ 276 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 277 PFOUR_COLOR_OFF_OVERLAY, ramsize); 278 } 279 #endif 280 281 /* Map the Brooktree. */ 282 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 283 PFOUR_COLOR_OFF_CMAP, 284 sizeof(struct fbcontrol), 285 BUS_SPACE_MAP_LINEAR, 286 0, &bh) != 0) { 287 printf("%s: cannot map control registers\n", self->dv_xname); 288 return; 289 } 290 sc->sc_fbc = (volatile struct fbcontrol *)bh; 291 292 /* grab initial (current) color map */ 293 bt = &sc->sc_fbc->fbc_dac; 294 bt->bt_addr = 0; 295 for (i = 0; i < 256 * 3 / 4; i++) 296 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 297 298 BT_INIT(bt, 24); 299 300 #if 0 /* See above. */ 301 if (isconsole) { 302 printf(" (console)\n"); 303 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 304 fbrcons_init(fb); 305 #endif 306 } else 307 #endif /* 0 */ 308 printf("\n"); 309 310 /* 311 * Even though we're not using rconsole, we'd still like 312 * to notice if we're the console framebuffer. 313 */ 314 fb_attach(fb, isconsole); 315 #endif 316 } 317 318 int 319 cgfouropen(dev, flags, mode, p) 320 dev_t dev; 321 int flags, mode; 322 struct proc *p; 323 { 324 int unit = minor(dev); 325 326 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 327 return (ENXIO); 328 return (0); 329 } 330 331 int 332 cgfourclose(dev, flags, mode, p) 333 dev_t dev; 334 int flags, mode; 335 struct proc *p; 336 { 337 338 return (0); 339 } 340 341 int 342 cgfourioctl(dev, cmd, data, flags, p) 343 dev_t dev; 344 u_long cmd; 345 caddr_t data; 346 int flags; 347 struct proc *p; 348 { 349 #if defined(SUN4) 350 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 351 struct fbgattr *fba; 352 int error; 353 354 switch (cmd) { 355 356 case FBIOGTYPE: 357 *(struct fbtype *)data = sc->sc_fb.fb_type; 358 break; 359 360 case FBIOGATTR: 361 fba = (struct fbgattr *)data; 362 fba->real_type = sc->sc_fb.fb_type.fb_type; 363 fba->owner = 0; /* XXX ??? */ 364 fba->fbtype = sc->sc_fb.fb_type; 365 fba->sattr.flags = 0; 366 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 367 fba->sattr.dev_specific[0] = -1; 368 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 369 fba->emu_types[1] = -1; 370 break; 371 372 case FBIOGETCMAP: 373 return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); 374 375 case FBIOPUTCMAP: 376 /* copy to software map */ 377 #define p ((struct fbcmap *)data) 378 error = bt_putcmap(p, &sc->sc_cmap, 256); 379 if (error) 380 return (error); 381 /* now blast them into the chip */ 382 /* XXX should use retrace interrupt */ 383 cgfourloadcmap(sc, p->index, p->count); 384 #undef p 385 break; 386 387 case FBIOGVIDEO: 388 *(int *)data = cgfour_get_video(sc); 389 break; 390 391 case FBIOSVIDEO: 392 cgfour_set_video(sc, *(int *)data); 393 break; 394 395 default: 396 return (ENOTTY); 397 } 398 #endif 399 return (0); 400 } 401 402 int 403 cgfourpoll(dev, events, p) 404 dev_t dev; 405 int events; 406 struct proc *p; 407 { 408 409 return (seltrue(dev, events, p)); 410 } 411 412 /* 413 * Return the address that would map the given device at the given 414 * offset, allowing for the given protection, or return -1 for error. 415 * 416 * the cg4 maps it's overlay plane for 128K, followed by the enable 417 * plane for 128K, followed by the colour plane (for as much colour 418 * as their is.) 419 * 420 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 421 * only it's colour plane, at 0. 422 */ 423 int 424 cgfourmmap(dev, off, prot) 425 dev_t dev; 426 int off, prot; 427 { 428 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 429 bus_space_handle_t bh; 430 int poff; 431 432 #define START_ENABLE (128*1024) 433 #define START_COLOR ((128*1024) + (128*1024)) 434 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 435 sc->sc_fb.fb_type.fb_height) 436 #define END_COLOR (START_COLOR + COLOR_SIZE) 437 #define NOOVERLAY (0x04000000) 438 439 if (off & PGOFSET) 440 panic("cgfourmap"); 441 442 if ((u_int)off >= NOOVERLAY) { 443 off -= NOOVERLAY; 444 445 /* 446 * X11 maps a huge chunk of the frame buffer; far more than 447 * there really is. We compensate by double-mapping the 448 * first page for as many other pages as it wants 449 */ 450 while (off >= COLOR_SIZE) 451 off -= COLOR_SIZE; /* XXX thorpej ??? */ 452 453 poff = off + PFOUR_COLOR_OFF_COLOR; 454 } else if ((u_int)off < START_ENABLE) { 455 /* 456 * in overlay plane 457 */ 458 poff = PFOUR_COLOR_OFF_OVERLAY + off; 459 } else if ((u_int)off < START_COLOR) { 460 /* 461 * in enable plane 462 */ 463 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 464 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 465 /* 466 * in colour plane 467 */ 468 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 469 } else 470 return (-1); 471 472 if (bus_space_mmap(sc->sc_bustag, 473 sc->sc_btype, 474 sc->sc_paddr + poff, 475 BUS_SPACE_MAP_LINEAR, &bh)) 476 return (-1); 477 478 return ((int)bh); 479 } 480 481 #if defined(SUN4) 482 /* 483 * Undo the effect of an FBIOSVIDEO that turns the video off. 484 */ 485 static void 486 cgfourunblank(dev) 487 struct device *dev; 488 { 489 490 cgfour_set_video((struct cgfour_softc *)dev, 1); 491 } 492 493 static int 494 cgfour_get_video(sc) 495 struct cgfour_softc *sc; 496 { 497 498 return (fb_pfour_get_video(&sc->sc_fb)); 499 } 500 501 static void 502 cgfour_set_video(sc, enable) 503 struct cgfour_softc *sc; 504 int enable; 505 { 506 507 fb_pfour_set_video(&sc->sc_fb, enable); 508 } 509 510 /* 511 * Load a subset of the current (new) colormap into the Brooktree DAC. 512 */ 513 static void 514 cgfourloadcmap(sc, start, ncolors) 515 struct cgfour_softc *sc; 516 int start, ncolors; 517 { 518 volatile struct bt_regs *bt; 519 u_int *ip, i; 520 int count; 521 522 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 523 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 524 bt = &sc->sc_fbc->fbc_dac; 525 bt->bt_addr = BT_D4M4(start) << 24; 526 while (--count >= 0) { 527 i = *ip++; 528 /* hardware that makes one want to pound boards with hammers */ 529 bt->bt_cmap = i; 530 bt->bt_cmap = i << 8; 531 bt->bt_cmap = i << 16; 532 bt->bt_cmap = i << 24; 533 } 534 } 535 #endif 536
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