1 /* $NetBSD: cgfour.c,v 1.45 2008/06/11 21:25:31 drochner 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1992, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This software was developed by the Computer Systems Engineering group 37 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 38 * contributed to Berkeley. 39 * 40 * All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Lawrence Berkeley Laboratory. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 * 69 * from @(#)cgthree.c 8.2 (Berkeley) 10/30/93 70 */ 71 72 /* 73 * Copyright (c) 1995 Theo de Raadt. All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 85 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 86 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 87 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 88 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 89 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 90 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 91 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 92 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 93 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 94 */ 95 96 /* 97 * color display (cgfour) driver. 98 * 99 * Does not handle interrupts, even though they can occur. 100 * 101 * XXX should defer colormap updates to vertical retrace interrupts 102 */ 103 104 #include <sys/cdefs.h> 105 __KERNEL_RCSID(0, "$NetBSD: cgfour.c,v 1.45 2008/06/11 21:25:31 drochner Exp $"); 106 107 #include <sys/param.h> 108 #include <sys/systm.h> 109 #include <sys/buf.h> 110 #include <sys/device.h> 111 #include <sys/ioctl.h> 112 #include <sys/malloc.h> 113 #include <sys/mman.h> 114 #include <sys/tty.h> 115 #include <sys/conf.h> 116 117 #include <machine/autoconf.h> 118 #include <machine/eeprom.h> 119 120 #include <dev/sun/fbio.h> 121 #include <dev/sun/fbvar.h> 122 #include <dev/sun/btreg.h> 123 #include <dev/sun/btvar.h> 124 #include <dev/sun/pfourreg.h> 125 126 /* per-display variables */ 127 struct cgfour_softc { 128 struct device sc_dev; /* base device */ 129 struct fbdevice sc_fb; /* frame buffer device */ 130 bus_space_tag_t sc_bustag; 131 bus_addr_t sc_paddr; /* phys address for device mmap() */ 132 133 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 134 union bt_cmap sc_cmap; /* Brooktree color map */ 135 }; 136 137 /* autoconfiguration driver */ 138 static int cgfourmatch(struct device *, struct cfdata *, void *); 139 static void cgfourattach(struct device *, struct device *, void *); 140 141 #if defined(SUN4) 142 static void cgfourunblank(struct device *); 143 #endif 144 145 static int cg4_pfour_probe(void *, void *); 146 147 CFATTACH_DECL(cgfour, sizeof(struct cgfour_softc), 148 cgfourmatch, cgfourattach, NULL, NULL); 149 150 extern struct cfdriver cgfour_cd; 151 152 dev_type_open(cgfouropen); 153 dev_type_ioctl(cgfourioctl); 154 dev_type_mmap(cgfourmmap); 155 156 const struct cdevsw cgfour_cdevsw = { 157 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 158 nostop, notty, nopoll, cgfourmmap, nokqfilter, 159 }; 160 161 #if defined(SUN4) 162 /* frame buffer generic driver */ 163 static struct fbdriver cgfourfbdriver = { 164 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 165 cgfourmmap, nokqfilter 166 }; 167 168 static void cgfourloadcmap(struct cgfour_softc *, int, int); 169 static int cgfour_get_video(struct cgfour_softc *); 170 static void cgfour_set_video(struct cgfour_softc *, int); 171 #endif 172 173 /* 174 * Match a cgfour. 175 */ 176 static int 177 cgfourmatch(struct device *parent, struct cfdata *cf, void *aux) 178 { 179 union obio_attach_args *uoba = aux; 180 struct obio4_attach_args *oba; 181 182 if (uoba->uoba_isobio4 == 0) 183 return (0); 184 185 oba = &uoba->uoba_oba4; 186 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 187 4, /* probe size */ 188 0, /* offset */ 189 0, /* flags */ 190 cg4_pfour_probe, NULL)); 191 } 192 193 static int 194 cg4_pfour_probe(void *vaddr, void *arg) 195 { 196 197 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 198 } 199 200 /* 201 * Attach a display. We need to notice if it is the console, too. 202 */ 203 static void 204 cgfourattach(struct device *parent, struct device *self, void *aux) 205 { 206 #if defined(SUN4) 207 struct cgfour_softc *sc = device_private(self); 208 union obio_attach_args *uoba = aux; 209 struct obio4_attach_args *oba = &uoba->uoba_oba4; 210 bus_space_handle_t bh; 211 volatile struct bt_regs *bt; 212 struct fbdevice *fb = &sc->sc_fb; 213 int ramsize, i, isconsole; 214 215 sc->sc_bustag = oba->oba_bustag; 216 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 217 218 /* Map the pfour register. */ 219 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 220 sizeof(uint32_t), 221 BUS_SPACE_MAP_LINEAR, 222 &bh) != 0) { 223 printf("%s: cannot map control registers\n", self->dv_xname); 224 return; 225 } 226 fb->fb_pfour = (volatile uint32_t *)bh; 227 228 fb->fb_driver = &cgfourfbdriver; 229 fb->fb_device = &sc->sc_dev; 230 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 231 fb->fb_flags = device_cfdata(&sc->sc_dev)->cf_flags & FB_USERMASK; 232 fb->fb_flags |= FB_PFOUR; 233 234 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 235 236 fb->fb_type.fb_depth = 8; 237 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 238 239 fb->fb_type.fb_cmsize = 256; 240 fb->fb_type.fb_size = ramsize; 241 printf(": cgfour/p4, %d x %d", 242 fb->fb_type.fb_width, fb->fb_type.fb_height); 243 244 isconsole = 0; 245 246 if (CPU_ISSUN4) { 247 struct eeprom *eep = (struct eeprom *)eeprom_va; 248 249 /* 250 * Assume this is the console if there's no eeprom info 251 * to be found. 252 */ 253 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 254 isconsole = fb_is_console(0); 255 } 256 257 #if 0 258 /* 259 * We don't do any of the console handling here. Instead, 260 * we let the bwtwo driver pick up the overlay plane and 261 * use it instead. Rconsole should have better performance 262 * with the 1-bit depth. 263 * -- Jason R. Thorpe <thorpej@NetBSD.org> 264 */ 265 266 /* 267 * When the ROM has mapped in a cgfour display, the address 268 * maps only the video RAM, so in any case we have to map the 269 * registers ourselves. We only need the video RAM if we are 270 * going to print characters via rconsole. 271 */ 272 273 if (isconsole) { 274 /* XXX this is kind of a waste */ 275 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 276 PFOUR_COLOR_OFF_OVERLAY, ramsize); 277 } 278 #endif 279 280 /* Map the Brooktree. */ 281 if (bus_space_map(oba->oba_bustag, 282 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 283 sizeof(struct fbcontrol), 284 BUS_SPACE_MAP_LINEAR, 285 &bh) != 0) { 286 printf("%s: cannot map control registers\n", self->dv_xname); 287 return; 288 } 289 sc->sc_fbc = (volatile struct fbcontrol *)bh; 290 291 /* grab initial (current) color map */ 292 bt = &sc->sc_fbc->fbc_dac; 293 bt->bt_addr = 0; 294 for (i = 0; i < 256 * 3 / 4; i++) 295 ((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24; 296 297 BT_INIT(bt, 24); 298 299 #if 0 /* See above. */ 300 if (isconsole) { 301 printf(" (console)\n"); 302 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 303 fbrcons_init(fb); 304 #endif 305 } else 306 #endif /* 0 */ 307 printf("\n"); 308 309 /* 310 * Even though we're not using rconsole, we'd still like 311 * to notice if we're the console framebuffer. 312 */ 313 fb_attach(fb, isconsole); 314 #endif /* SUN4 */ 315 } 316 317 int 318 cgfouropen(dev_t dev, int flags, int mode, struct lwp *l) 319 { 320 int unit = minor(dev); 321 322 if (device_lookup(&cgfour_cd, unit) == NULL) 323 return (ENXIO); 324 return (0); 325 } 326 327 int 328 cgfourioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 329 { 330 #if defined(SUN4) 331 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 332 struct fbgattr *fba; 333 int error; 334 335 switch (cmd) { 336 337 case FBIOGTYPE: 338 *(struct fbtype *)data = sc->sc_fb.fb_type; 339 break; 340 341 case FBIOGATTR: 342 fba = (struct fbgattr *)data; 343 fba->real_type = sc->sc_fb.fb_type.fb_type; 344 fba->owner = 0; /* XXX ??? */ 345 fba->fbtype = sc->sc_fb.fb_type; 346 fba->sattr.flags = 0; 347 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 348 fba->sattr.dev_specific[0] = -1; 349 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 350 fba->emu_types[1] = -1; 351 break; 352 353 case FBIOGETCMAP: 354 #define p ((struct fbcmap *)data) 355 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 356 357 case FBIOPUTCMAP: 358 /* copy to software map */ 359 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 360 if (error) 361 return (error); 362 /* now blast them into the chip */ 363 /* XXX should use retrace interrupt */ 364 cgfourloadcmap(sc, p->index, p->count); 365 #undef p 366 break; 367 368 case FBIOGVIDEO: 369 *(int *)data = cgfour_get_video(sc); 370 break; 371 372 case FBIOSVIDEO: 373 cgfour_set_video(sc, *(int *)data); 374 break; 375 376 default: 377 return (ENOTTY); 378 } 379 #endif /* SUN4 */ 380 381 return (0); 382 } 383 384 /* 385 * Return the address that would map the given device at the given 386 * offset, allowing for the given protection, or return -1 for error. 387 * 388 * the cg4 maps it's overlay plane for 128K, followed by the enable 389 * plane for 128K, followed by the colour plane (for as much colour 390 * as their is.) 391 * 392 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 393 * only it's colour plane, at 0. 394 */ 395 paddr_t 396 cgfourmmap(dev_t dev, off_t off, int prot) 397 { 398 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 399 off_t poff; 400 401 #define START_ENABLE (128*1024) 402 #define START_COLOR ((128*1024) + (128*1024)) 403 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 404 sc->sc_fb.fb_type.fb_height) 405 #define END_COLOR (START_COLOR + COLOR_SIZE) 406 #define NOOVERLAY (0x04000000) 407 408 if (off & PGOFSET) 409 panic("cgfourmap"); 410 411 if (off < 0) 412 return (-1); 413 else if ((u_int)off >= NOOVERLAY) { 414 off -= NOOVERLAY; 415 416 /* 417 * X11 maps a huge chunk of the frame buffer; far more than 418 * there really is. We compensate by double-mapping the 419 * first page for as many other pages as it wants 420 */ 421 while ((u_int)off >= COLOR_SIZE) 422 off -= COLOR_SIZE; /* XXX thorpej ??? */ 423 424 poff = off + PFOUR_COLOR_OFF_COLOR; 425 } else if ((u_int)off < START_ENABLE) { 426 /* 427 * in overlay plane 428 */ 429 poff = PFOUR_COLOR_OFF_OVERLAY + off; 430 } else if ((u_int)off < START_COLOR) { 431 /* 432 * in enable plane 433 */ 434 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 435 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 436 /* 437 * in colour plane 438 */ 439 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 440 } else 441 return (-1); 442 443 return (bus_space_mmap(sc->sc_bustag, 444 sc->sc_paddr, poff, 445 prot, BUS_SPACE_MAP_LINEAR)); 446 } 447 448 #if defined(SUN4) 449 /* 450 * Undo the effect of an FBIOSVIDEO that turns the video off. 451 */ 452 static void 453 cgfourunblank(struct device *dev) 454 { 455 456 cgfour_set_video(device_private(dev), 1); 457 } 458 459 static int 460 cgfour_get_video(struct cgfour_softc *sc) 461 { 462 463 return (fb_pfour_get_video(&sc->sc_fb)); 464 } 465 466 static void 467 cgfour_set_video(struct cgfour_softc *sc, int enable) 468 { 469 470 fb_pfour_set_video(&sc->sc_fb, enable); 471 } 472 473 /* 474 * Load a subset of the current (new) colormap into the Brooktree DAC. 475 */ 476 static void 477 cgfourloadcmap(struct cgfour_softc *sc, int start, int ncolors) 478 { 479 volatile struct bt_regs *bt; 480 u_int *ip, i; 481 int count; 482 483 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 484 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 485 bt = &sc->sc_fbc->fbc_dac; 486 bt->bt_addr = BT_D4M4(start) << 24; 487 while (--count >= 0) { 488 i = *ip++; 489 /* hardware that makes one want to pound boards with hammers */ 490 bt->bt_cmap = i; 491 bt->bt_cmap = i << 8; 492 bt->bt_cmap = i << 16; 493 bt->bt_cmap = i << 24; 494 } 495 } 496 #endif /* SUN4 */ 497