1 /* $NetBSD: cgfour.c,v 1.47 2012/10/27 17:18:11 chs 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 1.47 2012/10/27 17:18:11 chs 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 fbdevice sc_fb; /* frame buffer device */ 129 bus_space_tag_t sc_bustag; 130 bus_addr_t sc_paddr; /* phys address for device mmap() */ 131 132 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 133 union bt_cmap sc_cmap; /* Brooktree color map */ 134 }; 135 136 /* autoconfiguration driver */ 137 static int cgfourmatch(device_t, cfdata_t, void *); 138 static void cgfourattach(device_t, device_t, void *); 139 140 #if defined(SUN4) 141 static void cgfourunblank(device_t); 142 #endif 143 144 static int cg4_pfour_probe(void *, void *); 145 146 CFATTACH_DECL_NEW(cgfour, sizeof(struct cgfour_softc), 147 cgfourmatch, cgfourattach, NULL, NULL); 148 149 extern struct cfdriver cgfour_cd; 150 151 dev_type_open(cgfouropen); 152 dev_type_ioctl(cgfourioctl); 153 dev_type_mmap(cgfourmmap); 154 155 const struct cdevsw cgfour_cdevsw = { 156 cgfouropen, nullclose, noread, nowrite, cgfourioctl, 157 nostop, notty, nopoll, cgfourmmap, nokqfilter, 158 }; 159 160 #if defined(SUN4) 161 /* frame buffer generic driver */ 162 static struct fbdriver cgfourfbdriver = { 163 cgfourunblank, cgfouropen, nullclose, cgfourioctl, nopoll, 164 cgfourmmap, nokqfilter 165 }; 166 167 static void cgfourloadcmap(struct cgfour_softc *, int, int); 168 static int cgfour_get_video(struct cgfour_softc *); 169 static void cgfour_set_video(struct cgfour_softc *, int); 170 #endif 171 172 /* 173 * Match a cgfour. 174 */ 175 static int 176 cgfourmatch(device_t parent, cfdata_t cf, void *aux) 177 { 178 union obio_attach_args *uoba = aux; 179 struct obio4_attach_args *oba; 180 181 if (uoba->uoba_isobio4 == 0) 182 return (0); 183 184 oba = &uoba->uoba_oba4; 185 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 186 4, /* probe size */ 187 0, /* offset */ 188 0, /* flags */ 189 cg4_pfour_probe, NULL)); 190 } 191 192 static int 193 cg4_pfour_probe(void *vaddr, void *arg) 194 { 195 196 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR8P1); 197 } 198 199 /* 200 * Attach a display. We need to notice if it is the console, too. 201 */ 202 static void 203 cgfourattach(device_t parent, device_t self, void *aux) 204 { 205 #if defined(SUN4) 206 struct cgfour_softc *sc = device_private(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_paddr = (bus_addr_t)oba->oba_paddr; 216 217 /* Map the pfour register. */ 218 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 219 sizeof(uint32_t), 220 BUS_SPACE_MAP_LINEAR, 221 &bh) != 0) { 222 printf("%s: cannot map control registers\n", 223 device_xname(self)); 224 return; 225 } 226 fb->fb_pfour = (volatile uint32_t *)bh; 227 228 fb->fb_driver = &cgfourfbdriver; 229 fb->fb_device = self; 230 fb->fb_type.fb_type = FBTYPE_SUN4COLOR; 231 fb->fb_flags = device_cfdata(self)->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", 287 device_xname(self)); 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 /* SUN4 */ 316 } 317 318 int 319 cgfouropen(dev_t dev, int flags, int mode, struct lwp *l) 320 { 321 int unit = minor(dev); 322 323 if (device_lookup(&cgfour_cd, unit) == NULL) 324 return (ENXIO); 325 return (0); 326 } 327 328 int 329 cgfourioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 330 { 331 #if defined(SUN4) 332 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 333 struct fbgattr *fba; 334 int error; 335 336 switch (cmd) { 337 338 case FBIOGTYPE: 339 *(struct fbtype *)data = sc->sc_fb.fb_type; 340 break; 341 342 case FBIOGATTR: 343 fba = (struct fbgattr *)data; 344 fba->real_type = sc->sc_fb.fb_type.fb_type; 345 fba->owner = 0; /* XXX ??? */ 346 fba->fbtype = sc->sc_fb.fb_type; 347 fba->sattr.flags = 0; 348 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 349 fba->sattr.dev_specific[0] = -1; 350 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 351 fba->emu_types[1] = -1; 352 break; 353 354 case FBIOGETCMAP: 355 #define p ((struct fbcmap *)data) 356 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 357 358 case FBIOPUTCMAP: 359 /* copy to software map */ 360 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 361 if (error) 362 return (error); 363 /* now blast them into the chip */ 364 /* XXX should use retrace interrupt */ 365 cgfourloadcmap(sc, p->index, p->count); 366 #undef p 367 break; 368 369 case FBIOGVIDEO: 370 *(int *)data = cgfour_get_video(sc); 371 break; 372 373 case FBIOSVIDEO: 374 cgfour_set_video(sc, *(int *)data); 375 break; 376 377 default: 378 return (ENOTTY); 379 } 380 #endif /* SUN4 */ 381 382 return (0); 383 } 384 385 /* 386 * Return the address that would map the given device at the given 387 * offset, allowing for the given protection, or return -1 for error. 388 * 389 * the cg4 maps it's overlay plane for 128K, followed by the enable 390 * plane for 128K, followed by the colour plane (for as much colour 391 * as their is.) 392 * 393 * As well, mapping at an offset of 0x04000000 causes the cg4 to map 394 * only it's colour plane, at 0. 395 */ 396 paddr_t 397 cgfourmmap(dev_t dev, off_t off, int prot) 398 { 399 struct cgfour_softc *sc = device_lookup_private(&cgfour_cd, minor(dev)); 400 off_t poff; 401 402 #define START_ENABLE (128*1024) 403 #define START_COLOR ((128*1024) + (128*1024)) 404 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 405 sc->sc_fb.fb_type.fb_height) 406 #define END_COLOR (START_COLOR + COLOR_SIZE) 407 #define NOOVERLAY (0x04000000) 408 409 if (off & PGOFSET) 410 panic("cgfourmap"); 411 412 if (off < 0) 413 return (-1); 414 else if ((u_int)off >= NOOVERLAY) { 415 off -= NOOVERLAY; 416 417 /* 418 * X11 maps a huge chunk of the frame buffer; far more than 419 * there really is. We compensate by double-mapping the 420 * first page for as many other pages as it wants 421 */ 422 while ((u_int)off >= COLOR_SIZE) 423 off -= COLOR_SIZE; /* XXX thorpej ??? */ 424 425 poff = off + PFOUR_COLOR_OFF_COLOR; 426 } else if ((u_int)off < START_ENABLE) { 427 /* 428 * in overlay plane 429 */ 430 poff = PFOUR_COLOR_OFF_OVERLAY + off; 431 } else if ((u_int)off < START_COLOR) { 432 /* 433 * in enable plane 434 */ 435 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 436 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 437 /* 438 * in colour plane 439 */ 440 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 441 } else 442 return (-1); 443 444 return (bus_space_mmap(sc->sc_bustag, 445 sc->sc_paddr, poff, 446 prot, BUS_SPACE_MAP_LINEAR)); 447 } 448 449 #if defined(SUN4) 450 /* 451 * Undo the effect of an FBIOSVIDEO that turns the video off. 452 */ 453 static void 454 cgfourunblank(device_t dev) 455 { 456 457 cgfour_set_video(device_private(dev), 1); 458 } 459 460 static int 461 cgfour_get_video(struct cgfour_softc *sc) 462 { 463 464 return (fb_pfour_get_video(&sc->sc_fb)); 465 } 466 467 static void 468 cgfour_set_video(struct cgfour_softc *sc, int enable) 469 { 470 471 fb_pfour_set_video(&sc->sc_fb, enable); 472 } 473 474 /* 475 * Load a subset of the current (new) colormap into the Brooktree DAC. 476 */ 477 static void 478 cgfourloadcmap(struct cgfour_softc *sc, int start, int ncolors) 479 { 480 volatile struct bt_regs *bt; 481 u_int *ip, i; 482 int count; 483 484 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 485 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 486 bt = &sc->sc_fbc->fbc_dac; 487 bt->bt_addr = BT_D4M4(start) << 24; 488 while (--count >= 0) { 489 i = *ip++; 490 /* hardware that makes one want to pound boards with hammers */ 491 bt->bt_cmap = i; 492 bt->bt_cmap = i << 8; 493 bt->bt_cmap = i << 16; 494 bt->bt_cmap = i << 24; 495 } 496 } 497 #endif /* SUN4 */ 498