1 /* $NetBSD: cgeight.c,v 1.50 2014/10/18 08:33:26 snj 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 (cgeight) 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: cgeight.c,v 1.50 2014/10/18 08:33:26 snj 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 <uvm/uvm_extern.h> 118 119 #include <machine/autoconf.h> 120 #include <machine/eeprom.h> 121 122 #include <dev/sun/fbio.h> 123 #include <dev/sun/fbvar.h> 124 #include <dev/sun/btreg.h> 125 #include <dev/sun/btvar.h> 126 #include <dev/sun/pfourreg.h> 127 128 /* per-display variables */ 129 struct cgeight_softc { 130 struct fbdevice sc_fb; /* frame buffer device */ 131 bus_space_tag_t sc_bustag; 132 bus_addr_t sc_paddr; /* phys address for device mmap() */ 133 134 volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ 135 union bt_cmap sc_cmap; /* Brooktree color map */ 136 }; 137 138 /* autoconfiguration driver */ 139 static void cgeightattach(device_t, device_t, void *); 140 static int cgeightmatch(device_t, cfdata_t, void *); 141 #if defined(SUN4) 142 static void cgeightunblank(device_t); 143 #endif 144 145 static int cg8_pfour_probe(void *, void *); 146 147 CFATTACH_DECL_NEW(cgeight, sizeof(struct cgeight_softc), 148 cgeightmatch, cgeightattach, NULL, NULL); 149 150 extern struct cfdriver cgeight_cd; 151 152 dev_type_open(cgeightopen); 153 dev_type_ioctl(cgeightioctl); 154 dev_type_mmap(cgeightmmap); 155 156 const struct cdevsw cgeight_cdevsw = { 157 .d_open = cgeightopen, 158 .d_close = nullclose, 159 .d_read = noread, 160 .d_write = nowrite, 161 .d_ioctl = cgeightioctl, 162 .d_stop = nostop, 163 .d_tty = notty, 164 .d_poll = nopoll, 165 .d_mmap = cgeightmmap, 166 .d_kqfilter = nokqfilter, 167 .d_discard = nodiscard, 168 .d_flag = 0 169 }; 170 171 #if defined(SUN4) 172 /* frame buffer generic driver */ 173 static struct fbdriver cgeightfbdriver = { 174 cgeightunblank, cgeightopen, nullclose, cgeightioctl, 175 nopoll, cgeightmmap, nokqfilter 176 }; 177 178 static void cgeightloadcmap(struct cgeight_softc *, int, int); 179 static int cgeight_get_video(struct cgeight_softc *); 180 static void cgeight_set_video(struct cgeight_softc *, int); 181 #endif 182 183 /* 184 * Match a cgeight. 185 */ 186 static int 187 cgeightmatch(device_t parent, cfdata_t cf, 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 cg8_pfour_probe, NULL)); 201 } 202 203 static int 204 cg8_pfour_probe(void *vaddr, void *arg) 205 { 206 207 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24); 208 } 209 210 /* 211 * Attach a display. We need to notice if it is the console, too. 212 */ 213 static void 214 cgeightattach(device_t parent, device_t self, void *aux) 215 { 216 #if defined(SUN4) 217 union obio_attach_args *uoba = aux; 218 struct obio4_attach_args *oba = &uoba->uoba_oba4; 219 struct cgeight_softc *sc = device_private(self); 220 struct fbdevice *fb = &sc->sc_fb; 221 bus_space_handle_t bh; 222 volatile struct bt_regs *bt; 223 int ramsize, i, isconsole; 224 225 sc->sc_bustag = oba->oba_bustag; 226 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 227 228 /* Map the pfour register. */ 229 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 230 sizeof(uint32_t), 231 BUS_SPACE_MAP_LINEAR, 232 &bh) != 0) { 233 printf("%s: cannot map pfour register\n", 234 device_xname(self)); 235 return; 236 } 237 fb->fb_pfour = (volatile uint32_t *)bh; 238 239 fb->fb_driver = &cgeightfbdriver; 240 fb->fb_device = self; 241 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 242 fb->fb_flags = device_cfdata(self)->cf_flags & FB_USERMASK; 243 fb->fb_flags |= FB_PFOUR; 244 245 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 246 247 fb->fb_type.fb_depth = 24; 248 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 249 250 sc->sc_fb.fb_type.fb_cmsize = 256; 251 sc->sc_fb.fb_type.fb_size = ramsize; 252 printf(": cgeight/p4, %d x %d", 253 fb->fb_type.fb_width, 254 fb->fb_type.fb_height); 255 256 isconsole = 0; 257 258 if (CPU_ISSUN4) { 259 struct eeprom *eep = (struct eeprom *)eeprom_va; 260 261 /* 262 * Assume this is the console if there's no eeprom info 263 * to be found. 264 */ 265 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 266 isconsole = fb_is_console(0); 267 } 268 269 #if 0 270 /* 271 * We don't do any of the console handling here. Instead, 272 * we let the bwtwo driver pick up the overlay plane and 273 * use it instead. Rconsole should have better performance 274 * with the 1-bit depth. 275 * -- Jason R. Thorpe <thorpej@NetBSD.org> 276 */ 277 278 /* 279 * When the ROM has mapped in a cgfour display, the address 280 * maps only the video RAM, so in any case we have to map the 281 * registers ourselves. We only need the video RAM if we are 282 * going to print characters via rconsole. 283 */ 284 285 if (isconsole) { 286 /* XXX this is kind of a waste */ 287 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 288 PFOUR_COLOR_OFF_OVERLAY, ramsize); 289 } 290 #endif 291 292 /* Map the Brooktree. */ 293 if (bus_space_map(oba->oba_bustag, 294 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 295 sizeof(struct fbcontrol), 296 BUS_SPACE_MAP_LINEAR, 297 &bh) != 0) { 298 printf("%s: cannot map control registers\n", 299 device_xname(self)); 300 return; 301 } 302 sc->sc_fbc = (volatile struct fbcontrol *)bh; 303 304 #if 0 /* XXX thorpej ??? */ 305 /* tell the enable plane to look at the mono image */ 306 memset(ca->ca_ra.ra_vaddr, 0xff, 307 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 308 #endif 309 310 /* grab initial (current) color map */ 311 bt = &sc->sc_fbc->fbc_dac; 312 bt->bt_addr = 0; 313 for (i = 0; i < 256 * 3 / 4; i++) 314 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 315 316 BT_INIT(bt, 0); 317 318 #if 0 /* see above */ 319 if (isconsole) { 320 printf(" (console)\n"); 321 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 322 fbrcons_init(fb); 323 #endif 324 } else 325 #endif /* 0 */ 326 printf("\n"); 327 328 /* 329 * Even though we're not using rconsole, we'd still like 330 * to notice if we're the console framebuffer. 331 */ 332 fb_attach(&sc->sc_fb, isconsole); 333 #endif 334 } 335 336 int 337 cgeightopen(dev_t dev, int flags, int mode, struct lwp *l) 338 { 339 int unit = minor(dev); 340 341 if (device_lookup(&cgeight_cd, unit) == NULL) 342 return (ENXIO); 343 return (0); 344 } 345 346 int 347 cgeightioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 348 { 349 #if defined(SUN4) 350 struct cgeight_softc *sc = device_lookup_private(&cgeight_cd, 351 minor(dev)); 352 struct fbgattr *fba; 353 int error; 354 355 switch (cmd) { 356 357 case FBIOGTYPE: 358 *(struct fbtype *)data = sc->sc_fb.fb_type; 359 break; 360 361 case FBIOGATTR: 362 fba = (struct fbgattr *)data; 363 fba->real_type = sc->sc_fb.fb_type.fb_type; 364 fba->owner = 0; /* XXX ??? */ 365 fba->fbtype = sc->sc_fb.fb_type; 366 fba->sattr.flags = 0; 367 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 368 fba->sattr.dev_specific[0] = -1; 369 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 370 fba->emu_types[1] = -1; 371 break; 372 373 case FBIOGETCMAP: 374 #define p ((struct fbcmap *)data) 375 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 376 377 case FBIOPUTCMAP: 378 /* copy to software map */ 379 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 380 if (error) 381 return (error); 382 /* now blast them into the chip */ 383 /* XXX should use retrace interrupt */ 384 cgeightloadcmap(sc, p->index, p->count); 385 #undef p 386 break; 387 388 case FBIOGVIDEO: 389 *(int *)data = cgeight_get_video(sc); 390 break; 391 392 case FBIOSVIDEO: 393 cgeight_set_video(sc, *(int *)data); 394 break; 395 396 default: 397 return (ENOTTY); 398 } 399 #endif /* SUN4 */ 400 401 return (0); 402 } 403 404 /* 405 * Return the address that would map the given device at the given 406 * offset, allowing for the given protection, or return -1 for error. 407 * 408 * The cg8 maps its overlay plane at 0 for 128K, followed by the 409 * enable plane for 128K, followed by the colour for as long as it 410 * goes. Starting at 8MB, it maps the ramdac for PAGE_SIZE, then the p4 411 * register for PAGE_SIZE, then the bootrom for 0x40000. 412 */ 413 paddr_t 414 cgeightmmap(dev_t dev, off_t off, int prot) 415 { 416 struct cgeight_softc *sc = device_lookup_private(&cgeight_cd, 417 minor(dev)); 418 off_t poff; 419 420 #define START_ENABLE (128*1024) 421 #define START_COLOR ((128*1024) + (128*1024)) 422 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 423 sc->sc_fb.fb_type.fb_height * 3) 424 #define END_COLOR (START_COLOR + COLOR_SIZE) 425 #define START_SPECIAL 0x800000 426 #define PROMSIZE 0x40000 427 #define NOOVERLAY (0x04000000) 428 429 if (off & PGOFSET) 430 panic("cgeightmap"); 431 432 if (off < 0) 433 return (-1); 434 else if ((u_int)off >= NOOVERLAY) { 435 off -= NOOVERLAY; 436 437 /* 438 * X11 maps a huge chunk of the frame buffer; far more than 439 * there really is. We compensate by double-mapping the 440 * first page for as many other pages as it wants 441 */ 442 while ((u_int)off >= COLOR_SIZE) 443 off -= COLOR_SIZE; /* XXX thorpej ??? */ 444 445 poff = off + PFOUR_COLOR_OFF_COLOR; 446 } else if ((u_int)off < START_ENABLE) { 447 /* 448 * in overlay plane 449 */ 450 poff = PFOUR_COLOR_OFF_OVERLAY + off; 451 } else if ((u_int)off < START_COLOR) { 452 /* 453 * in enable plane 454 */ 455 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 456 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 457 /* 458 * in colour plane 459 */ 460 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 461 } else if ((u_int)off < START_SPECIAL) { 462 /* 463 * hole 464 */ 465 poff = 0; /* XXX */ 466 } else if ((u_int)off == START_SPECIAL) { 467 /* 468 * colour map (Brooktree) 469 */ 470 poff = PFOUR_COLOR_OFF_CMAP; 471 } else if ((u_int)off == START_SPECIAL + PAGE_SIZE) { 472 /* 473 * p4 register 474 */ 475 poff = 0; 476 } else if ((u_int)off > (START_SPECIAL + (PAGE_SIZE * 2)) && 477 (u_int) off < (START_SPECIAL + (PAGE_SIZE * 2) + PROMSIZE)) { 478 /* 479 * rom 480 */ 481 poff = 0x8000 + (off - (START_SPECIAL + (PAGE_SIZE * 2))); 482 } else 483 return (-1); 484 485 return (bus_space_mmap(sc->sc_bustag, 486 sc->sc_paddr, poff, 487 prot, BUS_SPACE_MAP_LINEAR)); 488 } 489 490 #if defined(SUN4) 491 /* 492 * Undo the effect of an FBIOSVIDEO that turns the video off. 493 */ 494 static void 495 cgeightunblank(device_t dev) 496 { 497 498 cgeight_set_video(device_private(dev), 1); 499 } 500 501 static int 502 cgeight_get_video(struct cgeight_softc *sc) 503 { 504 505 return (fb_pfour_get_video(&sc->sc_fb)); 506 } 507 508 static void 509 cgeight_set_video(struct cgeight_softc *sc, int enable) 510 { 511 512 fb_pfour_set_video(&sc->sc_fb, enable); 513 } 514 515 /* 516 * Load a subset of the current (new) colormap into the Brooktree DAC. 517 */ 518 static void 519 cgeightloadcmap(struct cgeight_softc *sc, int start, int ncolors) 520 { 521 volatile struct bt_regs *bt; 522 u_int *ip; 523 int count; 524 525 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 526 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 527 bt = &sc->sc_fbc->fbc_dac; 528 bt->bt_addr = BT_D4M4(start); 529 while (--count >= 0) 530 bt->bt_cmap = *ip++; 531 } 532 #endif /* SUN4 */ 533