1 /* $NetBSD: cgfour.c,v 1.39 2003/12/10 12:06:25 agc 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) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This software was developed by the Computer Systems Engineering group 44 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 45 * contributed to Berkeley. 46 * 47 * All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the University of 50 * California, Lawrence Berkeley Laboratory. 51 * 52 * Redistribution and use in source and binary forms, with or without 53 * modification, are permitted provided that the following conditions 54 * are met: 55 * 1. Redistributions of source code must retain the above copyright 56 * notice, this list of conditions and the following disclaimer. 57 * 2. Redistributions in binary form must reproduce the above copyright 58 * notice, this list of conditions and the following disclaimer in the 59 * documentation and/or other materials provided with the distribution. 60 * 3. Neither the name of the University nor the names of its contributors 61 * may be used to endorse or promote products derived from this software 62 * without specific prior written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 67 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 68 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 74 * SUCH DAMAGE. 75 * 76 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 77 */ 78 79 /* 80 * Copyright (c) 1995 Theo de Raadt. All rights reserved. 81 * 82 * Redistribution and use in source and binary forms, with or without 83 * modification, are permitted provided that the following conditions 84 * are met: 85 * 1. Redistributions of source code must retain the above copyright 86 * notice, this list of conditions and the following disclaimer. 87 * 2. Redistributions in binary form must reproduce the above copyright 88 * notice, this list of conditions and the following disclaimer in the 89 * documentation and/or other materials provided with the distribution. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 92 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 93 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 94 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 95 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 96 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 97 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 98 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 99 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 100 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 101 */ 102 103 /* 104 * color display (cgfour) driver. 105 * 106 * Does not handle interrupts, even though they can occur. 107 * 108 * XXX should defer colormap updates to vertical retrace interrupts 109 */ 110 111 #include <sys/cdefs.h> 112 __KERNEL_RCSID(0, "$NetBSD: cgfour.c,v 1.39 2003/12/10 12:06:25 agc Exp $"); 113 114 #include <sys/param.h> 115 #include <sys/systm.h> 116 #include <sys/buf.h> 117 #include <sys/device.h> 118 #include <sys/ioctl.h> 119 #include <sys/malloc.h> 120 #include <sys/mman.h> 121 #include <sys/tty.h> 122 #include <sys/conf.h> 123 124 #include <machine/autoconf.h> 125 #include <machine/eeprom.h> 126 127 #include <dev/sun/fbio.h> 128 #include <dev/sun/fbvar.h> 129 #include <dev/sun/btreg.h> 130 #include <dev/sun/btvar.h> 131 #include <dev/sun/pfourreg.h> 132 133 /* per-display variables */ 134 struct cgfour_softc { 135 struct device sc_dev; /* base device */ 136 struct fbdevice sc_fb; /* frame buffer device */ 137 bus_space_tag_t sc_bustag; 138 bus_addr_t sc_paddr; /* phys address for device mmap() */ 139 140 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 141 union bt_cmap sc_cmap; /* Brooktree color map */ 142 }; 143 144 /* autoconfiguration driver */ 145 static void cgfourattach __P((struct device *, struct device *, void *)); 146 static int cgfourmatch __P((struct device *, struct cfdata *, void *)); 147 148 #if defined(SUN4) 149 static void cgfourunblank __P((struct device *)); 150 #endif 151 152 static int cg4_pfour_probe __P((void *, void *)); 153 154 CFATTACH_DECL(cgfour, sizeof(struct cgfour_softc), 155 cgfourmatch, cgfourattach, NULL, NULL); 156 157 extern struct cfdriver cgfour_cd; 158 159 dev_type_open(cgfouropen); 160 dev_type_ioctl(cgfourioctl); 161 dev_type_mmap(cgfourmmap); 162 163 const struct cdevsw cgfour_cdevsw = { 164 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 165 nostop, notty, nopoll, cgfourmmap, nokqfilter, 166 }; 167 168 #if defined(SUN4) 169 /* frame buffer generic driver */ 170 static struct fbdriver cgfourfbdriver = { 171 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 172 cgfourmmap, nokqfilter 173 }; 174 175 static void cgfourloadcmap __P((struct cgfour_softc *, int, int)); 176 static int cgfour_get_video __P((struct cgfour_softc *)); 177 static void cgfour_set_video __P((struct cgfour_softc *, int)); 178 #endif 179 180 /* 181 * Match a cgfour. 182 */ 183 int 184 cgfourmatch(parent, cf, aux) 185 struct device *parent; 186 struct cfdata *cf; 187 void *aux; 188 { 189 union obio_attach_args *uoba = aux; 190 struct obio4_attach_args *oba; 191 192 if (uoba->uoba_isobio4 == 0) 193 return (0); 194 195 oba = &uoba->uoba_oba4; 196 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 197 4, /* probe size */ 198 0, /* offset */ 199 0, /* flags */ 200 cg4_pfour_probe, NULL)); 201 } 202 203 int 204 cg4_pfour_probe(vaddr, arg) 205 void *vaddr; 206 void *arg; 207 { 208 209 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 210 } 211 212 /* 213 * Attach a display. We need to notice if it is the console, too. 214 */ 215 void 216 cgfourattach(parent, self, aux) 217 struct device *parent, *self; 218 void *aux; 219 { 220 #if defined(SUN4) 221 struct cgfour_softc *sc = (struct cgfour_softc *)self; 222 union obio_attach_args *uoba = aux; 223 struct obio4_attach_args *oba = &uoba->uoba_oba4; 224 bus_space_handle_t bh; 225 volatile struct bt_regs *bt; 226 struct fbdevice *fb = &sc->sc_fb; 227 int ramsize, i, isconsole; 228 229 sc->sc_bustag = oba->oba_bustag; 230 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 231 232 /* Map the pfour register. */ 233 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 234 sizeof(u_int32_t), 235 BUS_SPACE_MAP_LINEAR, 236 &bh) != 0) { 237 printf("%s: cannot map control registers\n", self->dv_xname); 238 return; 239 } 240 fb->fb_pfour = (volatile u_int32_t *)bh; 241 242 fb->fb_driver = &cgfourfbdriver; 243 fb->fb_device = &sc->sc_dev; 244 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 245 fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK; 246 fb->fb_flags |= FB_PFOUR; 247 248 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 249 250 fb->fb_type.fb_depth = 8; 251 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 252 253 fb->fb_type.fb_cmsize = 256; 254 fb->fb_type.fb_size = ramsize; 255 printf(": cgfour/p4, %d x %d", 256 fb->fb_type.fb_width, fb->fb_type.fb_height); 257 258 isconsole = 0; 259 260 if (CPU_ISSUN4) { 261 struct eeprom *eep = (struct eeprom *)eeprom_va; 262 263 /* 264 * Assume this is the console if there's no eeprom info 265 * to be found. 266 */ 267 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 268 isconsole = fb_is_console(0); 269 } 270 271 #if 0 272 /* 273 * We don't do any of the console handling here. Instead, 274 * we let the bwtwo driver pick up the overlay plane and 275 * use it instead. Rconsole should have better performance 276 * with the 1-bit depth. 277 * -- Jason R. Thorpe <thorpej@NetBSD.org> 278 */ 279 280 /* 281 * When the ROM has mapped in a cgfour display, the address 282 * maps only the video RAM, so in any case we have to map the 283 * registers ourselves. We only need the video RAM if we are 284 * going to print characters via rconsole. 285 */ 286 287 if (isconsole) { 288 /* XXX this is kind of a waste */ 289 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 290 PFOUR_COLOR_OFF_OVERLAY, ramsize); 291 } 292 #endif 293 294 /* Map the Brooktree. */ 295 if (bus_space_map(oba->oba_bustag, 296 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 297 sizeof(struct fbcontrol), 298 BUS_SPACE_MAP_LINEAR, 299 &bh) != 0) { 300 printf("%s: cannot map control registers\n", self->dv_xname); 301 return; 302 } 303 sc->sc_fbc = (volatile struct fbcontrol *)bh; 304 305 /* grab initial (current) color map */ 306 bt = &sc->sc_fbc->fbc_dac; 307 bt->bt_addr = 0; 308 for (i = 0; i < 256 * 3 / 4; i++) 309 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 310 311 BT_INIT(bt, 24); 312 313 #if 0 /* See above. */ 314 if (isconsole) { 315 printf(" (console)\n"); 316 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 317 fbrcons_init(fb); 318 #endif 319 } else 320 #endif /* 0 */ 321 printf("\n"); 322 323 /* 324 * Even though we're not using rconsole, we'd still like 325 * to notice if we're the console framebuffer. 326 */ 327 fb_attach(fb, isconsole); 328 #endif 329 } 330 331 int 332 cgfouropen(dev, flags, mode, p) 333 dev_t dev; 334 int flags, mode; 335 struct proc *p; 336 { 337 int unit = minor(dev); 338 339 if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.cd_devs[unit] == NULL) 340 return (ENXIO); 341 return (0); 342 } 343 344 int 345 cgfourioctl(dev, cmd, data, flags, p) 346 dev_t dev; 347 u_long cmd; 348 caddr_t data; 349 int flags; 350 struct proc *p; 351 { 352 #if defined(SUN4) 353 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 354 struct fbgattr *fba; 355 int error; 356 357 switch (cmd) { 358 359 case FBIOGTYPE: 360 *(struct fbtype *)data = sc->sc_fb.fb_type; 361 break; 362 363 case FBIOGATTR: 364 fba = (struct fbgattr *)data; 365 fba->real_type = sc->sc_fb.fb_type.fb_type; 366 fba->owner = 0; /* XXX ??? */ 367 fba->fbtype = sc->sc_fb.fb_type; 368 fba->sattr.flags = 0; 369 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 370 fba->sattr.dev_specific[0] = -1; 371 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 372 fba->emu_types[1] = -1; 373 break; 374 375 case FBIOGETCMAP: 376 #define p ((struct fbcmap *)data) 377 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 378 379 case FBIOPUTCMAP: 380 /* copy to software map */ 381 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 382 if (error) 383 return (error); 384 /* now blast them into the chip */ 385 /* XXX should use retrace interrupt */ 386 cgfourloadcmap(sc, p->index, p->count); 387 #undef p 388 break; 389 390 case FBIOGVIDEO: 391 *(int *)data = cgfour_get_video(sc); 392 break; 393 394 case FBIOSVIDEO: 395 cgfour_set_video(sc, *(int *)data); 396 break; 397 398 default: 399 return (ENOTTY); 400 } 401 #endif 402 return (0); 403 } 404 405 /* 406 * Return the address that would map the given device at the given 407 * offset, allowing for the given protection, or return -1 for error. 408 * 409 * the cg4 maps it's overlay plane for 128K, followed by the enable 410 * plane for 128K, followed by the colour plane (for as much colour 411 * as their is.) 412 * 413 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 414 * only it's colour plane, at 0. 415 */ 416 paddr_t 417 cgfourmmap(dev, off, prot) 418 dev_t dev; 419 off_t off; 420 int prot; 421 { 422 struct cgfour_softc *sc = cgfour_cd.cd_devs[minor(dev)]; 423 off_t poff; 424 425 #define START_ENABLE (128*1024) 426 #define START_COLOR ((128*1024) + (128*1024)) 427 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 428 sc->sc_fb.fb_type.fb_height) 429 #define END_COLOR (START_COLOR + COLOR_SIZE) 430 #define NOOVERLAY (0x04000000) 431 432 if (off & PGOFSET) 433 panic("cgfourmap"); 434 435 if (off < 0) 436 return (-1); 437 else if ((u_int)off >= NOOVERLAY) { 438 off -= NOOVERLAY; 439 440 /* 441 * X11 maps a huge chunk of the frame buffer; far more than 442 * there really is. We compensate by double-mapping the 443 * first page for as many other pages as it wants 444 */ 445 while ((u_int)off >= COLOR_SIZE) 446 off -= COLOR_SIZE; /* XXX thorpej ??? */ 447 448 poff = off + PFOUR_COLOR_OFF_COLOR; 449 } else if ((u_int)off < START_ENABLE) { 450 /* 451 * in overlay plane 452 */ 453 poff = PFOUR_COLOR_OFF_OVERLAY + off; 454 } else if ((u_int)off < START_COLOR) { 455 /* 456 * in enable plane 457 */ 458 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 459 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 460 /* 461 * in colour plane 462 */ 463 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 464 } else 465 return (-1); 466 467 return (bus_space_mmap(sc->sc_bustag, 468 sc->sc_paddr, poff, 469 prot, BUS_SPACE_MAP_LINEAR)); 470 } 471 472 #if defined(SUN4) 473 /* 474 * Undo the effect of an FBIOSVIDEO that turns the video off. 475 */ 476 static void 477 cgfourunblank(dev) 478 struct device *dev; 479 { 480 481 cgfour_set_video((struct cgfour_softc *)dev, 1); 482 } 483 484 static int 485 cgfour_get_video(sc) 486 struct cgfour_softc *sc; 487 { 488 489 return (fb_pfour_get_video(&sc->sc_fb)); 490 } 491 492 static void 493 cgfour_set_video(sc, enable) 494 struct cgfour_softc *sc; 495 int enable; 496 { 497 498 fb_pfour_set_video(&sc->sc_fb, enable); 499 } 500 501 /* 502 * Load a subset of the current (new) colormap into the Brooktree DAC. 503 */ 504 static void 505 cgfourloadcmap(sc, start, ncolors) 506 struct cgfour_softc *sc; 507 int start, ncolors; 508 { 509 volatile struct bt_regs *bt; 510 u_int *ip, i; 511 int count; 512 513 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 514 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 515 bt = &sc->sc_fbc->fbc_dac; 516 bt->bt_addr = BT_D4M4(start) << 24; 517 while (--count >= 0) { 518 i = *ip++; 519 /* hardware that makes one want to pound boards with hammers */ 520 bt->bt_cmap = i; 521 bt->bt_cmap = i << 8; 522 bt->bt_cmap = i << 16; 523 bt->bt_cmap = i << 24; 524 } 525 } 526 #endif 527