cgfour.c revision 1.27
1 /* $NetBSD: cgfour.c,v 1.27 2002/09/06 13:18:43 gehenna 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 struct cfattach cgfour_ca = { 137 sizeof(struct cgfour_softc), cgfourmatch, cgfourattach 138 }; 139 140 extern struct cfdriver cgfour_cd; 141 142 dev_type_open(cgfouropen); 143 dev_type_ioctl(cgfourioctl); 144 dev_type_mmap(cgfourmmap); 145 146 const struct cdevsw cgfour_cdevsw = { 147 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 148 nostop, notty, nopoll, cgfourmmap, 149 }; 150 151 #if defined(SUN4) 152 /* frame buffer generic driver */ 153 static struct fbdriver cgfourfbdriver = { 154 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 155 cgfourmmap 156 }; 157 158 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 159 static int cgfour_get_video __P((struct cgfour_softc *)); 160 static void cgfour_set_video __P((struct cgfour_softc *, int)); 161 #endif 162 163 /* 164 * Match a cgfour. 165 */ 166 int 167 cgfourmatch(parent, cf, aux) 168 struct device *parent; 169 struct cfdata *cf; 170 void *aux; 171 { 172 union obio_attach_args *uoba = aux; 173 struct obio4_attach_args *oba; 174 175 if (uoba->uoba_isobio4 == 0) 176 return (0); 177 178 oba = &uoba->uoba_oba4; 179 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 180 4, /* probe size */ 181 0, /* offset */ 182 0, /* flags */ 183 cg4_pfour_probe, NULL)); 184 } 185 186 int 187 cg4_pfour_probe(vaddr, arg) 188 void *vaddr; 189 void *arg; 190 { 191 192 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 193 } 194 195 /* 196 * Attach a display. We need to notice if it is the console, too. 197 */ 198 void 199 cgfourattach(parent, self, aux) 200 struct device *parent, *self; 201 void *aux; 202 { 203 #if defined(SUN4) 204 struct cgfour_softc *sc = (struct cgfour_softc *)self; 205 union obio_attach_args *uoba = aux; 206 struct obio4_attach_args *oba = &uoba->uoba_oba4; 207 bus_space_handle_t bh; 208 volatile struct bt_regs *bt; 209 struct fbdevice *fb = &sc->sc_fb; 210 int ramsize, i, isconsole; 211 212 sc->sc_bustag = oba->oba_bustag; 213 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 214 215 /* Map the pfour register. */ 216 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 217 sizeof(u_int32_t), 218 BUS_SPACE_MAP_LINEAR, 219 &bh) != 0) { 220 printf("%s: cannot map control registers\n", self->dv_xname); 221 return; 222 } 223 fb->fb_pfour = (volatile u_int32_t *)bh; 224 225 fb->fb_driver = &cgfourfbdriver; 226 fb->fb_device = &sc->sc_dev; 227 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 228 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 229 fb->fb_flags |= FB_PFOUR; 230 231 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 232 233 fb->fb_type.fb_depth = 8; 234 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 235 236 fb->fb_type.fb_cmsize = 256; 237 fb->fb_type.fb_size = ramsize; 238 printf(": cgfour/p4, %d x %d", 239 fb->fb_type.fb_width, fb->fb_type.fb_height); 240 241 isconsole = 0; 242 243 if (CPU_ISSUN4) { 244 struct eeprom *eep = (struct eeprom *)eeprom_va; 245 246 /* 247 * Assume this is the console if there's no eeprom info 248 * to be found. 249 */ 250 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 251 isconsole = fb_is_console(0); 252 } 253 254 #if 0 255 /* 256 * We don't do any of the console handling here. Instead, 257 * we let the bwtwo driver pick up the overlay plane and 258 * use it instead. Rconsole should have better performance 259 * with the 1-bit depth. 260 * -- Jason R. Thorpe <thorpej (at) NetBSD.ORG> 261 */ 262 263 /* 264 * When the ROM has mapped in a cgfour display, the address 265 * maps only the video RAM, so in any case we have to map the 266 * registers ourselves. We only need the video RAM if we are 267 * going to print characters via rconsole. 268 */ 269 270 if (isconsole) { 271 /* XXX this is kind of a waste */ 272 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 273 PFOUR_COLOR_OFF_OVERLAY, ramsize); 274 } 275 #endif 276 277 /* Map the Brooktree. */ 278 if (bus_space_map(oba->oba_bustag, 279 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 280 sizeof(struct fbcontrol), 281 BUS_SPACE_MAP_LINEAR, 282 &bh) != 0) { 283 printf("%s: cannot map control registers\n", self->dv_xname); 284 return; 285 } 286 sc->sc_fbc = (volatile struct fbcontrol *)bh; 287 288 /* grab initial (current) color map */ 289 bt = &sc->sc_fbc->fbc_dac; 290 bt->bt_addr = 0; 291 for (i = 0; i < 256 * 3 / 4; i++) 292 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 293 294 BT_INIT(bt, 24); 295 296 #if 0 /* See above. */ 297 if (isconsole) { 298 printf(" (console)\n"); 299 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 300 fbrcons_init(fb); 301 #endif 302 } else 303 #endif /* 0 */ 304 printf("\n"); 305 306 /* 307 * Even though we're not using rconsole, we'd still like 308 * to notice if we're the console framebuffer. 309 */ 310 fb_attach(fb, isconsole); 311 #endif 312 } 313 314 int 315 cgfouropen(dev, flags, mode, p) 316 dev_t dev; 317 int flags, mode; 318 struct proc *p; 319 { 320 int unit = minor(dev); 321 322 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 323 return (ENXIO); 324 return (0); 325 } 326 327 int 328 cgfourioctl(dev, cmd, data, flags, p) 329 dev_t dev; 330 u_long cmd; 331 caddr_t data; 332 int flags; 333 struct proc *p; 334 { 335 #if defined(SUN4) 336 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 337 struct fbgattr *fba; 338 int error; 339 340 switch (cmd) { 341 342 case FBIOGTYPE: 343 *(struct fbtype *)data = sc->sc_fb.fb_type; 344 break; 345 346 case FBIOGATTR: 347 fba = (struct fbgattr *)data; 348 fba->real_type = sc->sc_fb.fb_type.fb_type; 349 fba->owner = 0; /* XXX ??? */ 350 fba->fbtype = sc->sc_fb.fb_type; 351 fba->sattr.flags = 0; 352 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 353 fba->sattr.dev_specific[0] = -1; 354 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 355 fba->emu_types[1] = -1; 356 break; 357 358 case FBIOGETCMAP: 359 #define p ((struct fbcmap *)data) 360 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 361 362 case FBIOPUTCMAP: 363 /* copy to software map */ 364 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 365 if (error) 366 return (error); 367 /* now blast them into the chip */ 368 /* XXX should use retrace interrupt */ 369 cgfourloadcmap(sc, p->index, p->count); 370 #undef p 371 break; 372 373 case FBIOGVIDEO: 374 *(int *)data = cgfour_get_video(sc); 375 break; 376 377 case FBIOSVIDEO: 378 cgfour_set_video(sc, *(int *)data); 379 break; 380 381 default: 382 return (ENOTTY); 383 } 384 #endif 385 return (0); 386 } 387 388 /* 389 * Return the address that would map the given device at the given 390 * offset, allowing for the given protection, or return -1 for error. 391 * 392 * the cg4 maps it's overlay plane for 128K, followed by the enable 393 * plane for 128K, followed by the colour plane (for as much colour 394 * as their is.) 395 * 396 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 397 * only it's colour plane, at 0. 398 */ 399 paddr_t 400 cgfourmmap(dev, off, prot) 401 dev_t dev; 402 off_t off; 403 int prot; 404 { 405 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 406 off_t poff; 407 408 #define START_ENABLE (128*1024) 409 #define START_COLOR ((128*1024) + (128*1024)) 410 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 411 sc->sc_fb.fb_type.fb_height) 412 #define END_COLOR (START_COLOR + COLOR_SIZE) 413 #define NOOVERLAY (0x04000000) 414 415 if (off & PGOFSET) 416 panic("cgfourmap"); 417 418 if (off < 0) 419 return (-1); 420 else if ((u_int)off >= NOOVERLAY) { 421 off -= NOOVERLAY; 422 423 /* 424 * X11 maps a huge chunk of the frame buffer; far more than 425 * there really is. We compensate by double-mapping the 426 * first page for as many other pages as it wants 427 */ 428 while ((u_int)off >= COLOR_SIZE) 429 off -= COLOR_SIZE; /* XXX thorpej ??? */ 430 431 poff = off + PFOUR_COLOR_OFF_COLOR; 432 } else if ((u_int)off < START_ENABLE) { 433 /* 434 * in overlay plane 435 */ 436 poff = PFOUR_COLOR_OFF_OVERLAY + off; 437 } else if ((u_int)off < START_COLOR) { 438 /* 439 * in enable plane 440 */ 441 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 442 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 443 /* 444 * in colour plane 445 */ 446 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 447 } else 448 return (-1); 449 450 return (bus_space_mmap(sc->sc_bustag, 451 sc->sc_paddr, poff, 452 prot, BUS_SPACE_MAP_LINEAR)); 453 } 454 455 #if defined(SUN4) 456 /* 457 * Undo the effect of an FBIOSVIDEO that turns the video off. 458 */ 459 static void 460 cgfourunblank(dev) 461 struct device *dev; 462 { 463 464 cgfour_set_video((struct cgfour_softc *)dev, 1); 465 } 466 467 static int 468 cgfour_get_video(sc) 469 struct cgfour_softc *sc; 470 { 471 472 return (fb_pfour_get_video(&sc->sc_fb)); 473 } 474 475 static void 476 cgfour_set_video(sc, enable) 477 struct cgfour_softc *sc; 478 int enable; 479 { 480 481 fb_pfour_set_video(&sc->sc_fb, enable); 482 } 483 484 /* 485 * Load a subset of the current (new) colormap into the Brooktree DAC. 486 */ 487 static void 488 cgfourloadcmap(sc, start, ncolors) 489 struct cgfour_softc *sc; 490 int start, ncolors; 491 { 492 volatile struct bt_regs *bt; 493 u_int *ip, i; 494 int count; 495 496 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 497 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 498 bt = &sc->sc_fbc->fbc_dac; 499 bt->bt_addr = BT_D4M4(start) << 24; 500 while (--count >= 0) { 501 i = *ip++; 502 /* hardware that makes one want to pound boards with hammers */ 503 bt->bt_cmap = i; 504 bt->bt_cmap = i << 8; 505 bt->bt_cmap = i << 16; 506 bt->bt_cmap = i << 24; 507 } 508 } 509 #endif 510
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