1 /* $NetBSD: cgeight.c,v 1.51 2023/12/20 05:33:18 thorpej 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 1.51 2023/12/20 05:33:18 thorpej 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/mman.h> 113 #include <sys/tty.h> 114 #include <sys/conf.h> 115 116 #include <uvm/uvm_extern.h> 117 118 #include <machine/autoconf.h> 119 #include <machine/eeprom.h> 120 121 #include <dev/sun/fbio.h> 122 #include <dev/sun/fbvar.h> 123 #include <dev/sun/btreg.h> 124 #include <dev/sun/btvar.h> 125 #include <dev/sun/pfourreg.h> 126 127 /* per-display variables */ 128 struct cgeight_softc { 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 void cgeightattach(device_t, device_t, void *); 139 static int cgeightmatch(device_t, cfdata_t, void *); 140 #if defined(SUN4) 141 static void cgeightunblank(device_t); 142 #endif 143 144 static int cg8_pfour_probe(void *, void *); 145 146 CFATTACH_DECL_NEW(cgeight, sizeof(struct cgeight_softc), 147 cgeightmatch, cgeightattach, NULL, NULL); 148 149 extern struct cfdriver cgeight_cd; 150 151 dev_type_open(cgeightopen); 152 dev_type_ioctl(cgeightioctl); 153 dev_type_mmap(cgeightmmap); 154 155 const struct cdevsw cgeight_cdevsw = { 156 .d_open = cgeightopen, 157 .d_close = nullclose, 158 .d_read = noread, 159 .d_write = nowrite, 160 .d_ioctl = cgeightioctl, 161 .d_stop = nostop, 162 .d_tty = notty, 163 .d_poll = nopoll, 164 .d_mmap = cgeightmmap, 165 .d_kqfilter = nokqfilter, 166 .d_discard = nodiscard, 167 .d_flag = 0 168 }; 169 170 #if defined(SUN4) 171 /* frame buffer generic driver */ 172 static struct fbdriver cgeightfbdriver = { 173 cgeightunblank, cgeightopen, nullclose, cgeightioctl, 174 nopoll, cgeightmmap, nokqfilter 175 }; 176 177 static void cgeightloadcmap(struct cgeight_softc *, int, int); 178 static int cgeight_get_video(struct cgeight_softc *); 179 static void cgeight_set_video(struct cgeight_softc *, int); 180 #endif 181 182 /* 183 * Match a cgeight. 184 */ 185 static int 186 cgeightmatch(device_t parent, cfdata_t cf, void *aux) 187 { 188 union obio_attach_args *uoba = aux; 189 struct obio4_attach_args *oba; 190 191 if (uoba->uoba_isobio4 == 0) 192 return (0); 193 194 oba = &uoba->uoba_oba4; 195 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 196 4, /* probe size */ 197 0, /* offset */ 198 0, /* flags */ 199 cg8_pfour_probe, NULL)); 200 } 201 202 static int 203 cg8_pfour_probe(void *vaddr, void *arg) 204 { 205 206 return (fb_pfour_id(vaddr) == PFOUR_ID_COLOR24); 207 } 208 209 /* 210 * Attach a display. We need to notice if it is the console, too. 211 */ 212 static void 213 cgeightattach(device_t parent, device_t self, void *aux) 214 { 215 #if defined(SUN4) 216 union obio_attach_args *uoba = aux; 217 struct obio4_attach_args *oba = &uoba->uoba_oba4; 218 struct cgeight_softc *sc = device_private(self); 219 struct fbdevice *fb = &sc->sc_fb; 220 bus_space_handle_t bh; 221 volatile struct bt_regs *bt; 222 int ramsize, i, isconsole; 223 224 sc->sc_bustag = oba->oba_bustag; 225 sc->sc_paddr = (bus_addr_t)oba->oba_paddr; 226 227 /* Map the pfour register. */ 228 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 229 sizeof(uint32_t), 230 BUS_SPACE_MAP_LINEAR, 231 &bh) != 0) { 232 printf("%s: cannot map pfour register\n", 233 device_xname(self)); 234 return; 235 } 236 fb->fb_pfour = (volatile uint32_t *)bh; 237 238 fb->fb_driver = &cgeightfbdriver; 239 fb->fb_device = self; 240 fb->fb_type.fb_type = FBTYPE_MEMCOLOR; 241 fb->fb_flags = device_cfdata(self)->cf_flags & FB_USERMASK; 242 fb->fb_flags |= FB_PFOUR; 243 244 ramsize = PFOUR_COLOR_OFF_END - PFOUR_COLOR_OFF_OVERLAY; 245 246 fb->fb_type.fb_depth = 24; 247 fb_setsize_eeprom(fb, fb->fb_type.fb_depth, 1152, 900); 248 249 sc->sc_fb.fb_type.fb_cmsize = 256; 250 sc->sc_fb.fb_type.fb_size = ramsize; 251 printf(": cgeight/p4, %d x %d", 252 fb->fb_type.fb_width, 253 fb->fb_type.fb_height); 254 255 isconsole = 0; 256 257 if (CPU_ISSUN4) { 258 struct eeprom *eep = (struct eeprom *)eeprom_va; 259 260 /* 261 * Assume this is the console if there's no eeprom info 262 * to be found. 263 */ 264 if (eep == NULL || eep->eeConsole == EE_CONS_P4OPT) 265 isconsole = fb_is_console(0); 266 } 267 268 #if 0 269 /* 270 * We don't do any of the console handling here. Instead, 271 * we let the bwtwo driver pick up the overlay plane and 272 * use it instead. Rconsole should have better performance 273 * with the 1-bit depth. 274 * -- Jason R. Thorpe <thorpej@NetBSD.org> 275 */ 276 277 /* 278 * When the ROM has mapped in a cgfour display, the address 279 * maps only the video RAM, so in any case we have to map the 280 * registers ourselves. We only need the video RAM if we are 281 * going to print characters via rconsole. 282 */ 283 284 if (isconsole) { 285 /* XXX this is kind of a waste */ 286 fb->fb_pixels = mapiodev(ca->ca_ra.ra_reg, 287 PFOUR_COLOR_OFF_OVERLAY, ramsize); 288 } 289 #endif 290 291 /* Map the Brooktree. */ 292 if (bus_space_map(oba->oba_bustag, 293 oba->oba_paddr + PFOUR_COLOR_OFF_CMAP, 294 sizeof(struct fbcontrol), 295 BUS_SPACE_MAP_LINEAR, 296 &bh) != 0) { 297 printf("%s: cannot map control registers\n", 298 device_xname(self)); 299 return; 300 } 301 sc->sc_fbc = (volatile struct fbcontrol *)bh; 302 303 #if 0 /* XXX thorpej ??? */ 304 /* tell the enable plane to look at the mono image */ 305 memset(ca->ca_ra.ra_vaddr, 0xff, 306 sc->sc_fb.fb_type.fb_width * sc->sc_fb.fb_type.fb_height / 8); 307 #endif 308 309 /* grab initial (current) color map */ 310 bt = &sc->sc_fbc->fbc_dac; 311 bt->bt_addr = 0; 312 for (i = 0; i < 256 * 3 / 4; i++) 313 sc->sc_cmap.cm_chip[i] = bt->bt_cmap; 314 315 BT_INIT(bt, 0); 316 317 #if 0 /* see above */ 318 if (isconsole) { 319 printf(" (console)\n"); 320 #if defined(RASTERCONSOLE) && 0 /* XXX been told it doesn't work well. */ 321 fbrcons_init(fb); 322 #endif 323 } else 324 #endif /* 0 */ 325 printf("\n"); 326 327 /* 328 * Even though we're not using rconsole, we'd still like 329 * to notice if we're the console framebuffer. 330 */ 331 fb_attach(&sc->sc_fb, isconsole); 332 #endif 333 } 334 335 int 336 cgeightopen(dev_t dev, int flags, int mode, struct lwp *l) 337 { 338 int unit = minor(dev); 339 340 if (device_lookup(&cgeight_cd, unit) == NULL) 341 return (ENXIO); 342 return (0); 343 } 344 345 int 346 cgeightioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) 347 { 348 #if defined(SUN4) 349 struct cgeight_softc *sc = device_lookup_private(&cgeight_cd, 350 minor(dev)); 351 struct fbgattr *fba; 352 int error; 353 354 switch (cmd) { 355 356 case FBIOGTYPE: 357 *(struct fbtype *)data = sc->sc_fb.fb_type; 358 break; 359 360 case FBIOGATTR: 361 fba = (struct fbgattr *)data; 362 fba->real_type = sc->sc_fb.fb_type.fb_type; 363 fba->owner = 0; /* XXX ??? */ 364 fba->fbtype = sc->sc_fb.fb_type; 365 fba->sattr.flags = 0; 366 fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; 367 fba->sattr.dev_specific[0] = -1; 368 fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; 369 fba->emu_types[1] = -1; 370 break; 371 372 case FBIOGETCMAP: 373 #define p ((struct fbcmap *)data) 374 return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); 375 376 case FBIOPUTCMAP: 377 /* copy to software map */ 378 error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 379 if (error) 380 return (error); 381 /* now blast them into the chip */ 382 /* XXX should use retrace interrupt */ 383 cgeightloadcmap(sc, p->index, p->count); 384 #undef p 385 break; 386 387 case FBIOGVIDEO: 388 *(int *)data = cgeight_get_video(sc); 389 break; 390 391 case FBIOSVIDEO: 392 cgeight_set_video(sc, *(int *)data); 393 break; 394 395 default: 396 return (ENOTTY); 397 } 398 #endif /* SUN4 */ 399 400 return (0); 401 } 402 403 /* 404 * Return the address that would map the given device at the given 405 * offset, allowing for the given protection, or return -1 for error. 406 * 407 * The cg8 maps its overlay plane at 0 for 128K, followed by the 408 * enable plane for 128K, followed by the colour for as long as it 409 * goes. Starting at 8MB, it maps the ramdac for PAGE_SIZE, then the p4 410 * register for PAGE_SIZE, then the bootrom for 0x40000. 411 */ 412 paddr_t 413 cgeightmmap(dev_t dev, off_t off, int prot) 414 { 415 struct cgeight_softc *sc = device_lookup_private(&cgeight_cd, 416 minor(dev)); 417 off_t poff; 418 419 #define START_ENABLE (128*1024) 420 #define START_COLOR ((128*1024) + (128*1024)) 421 #define COLOR_SIZE (sc->sc_fb.fb_type.fb_width * \ 422 sc->sc_fb.fb_type.fb_height * 3) 423 #define END_COLOR (START_COLOR + COLOR_SIZE) 424 #define START_SPECIAL 0x800000 425 #define PROMSIZE 0x40000 426 #define NOOVERLAY (0x04000000) 427 428 if (off & PGOFSET) 429 panic("cgeightmap"); 430 431 if (off < 0) 432 return (-1); 433 else if ((u_int)off >= NOOVERLAY) { 434 off -= NOOVERLAY; 435 436 /* 437 * X11 maps a huge chunk of the frame buffer; far more than 438 * there really is. We compensate by double-mapping the 439 * first page for as many other pages as it wants 440 */ 441 while ((u_int)off >= COLOR_SIZE) 442 off -= COLOR_SIZE; /* XXX thorpej ??? */ 443 444 poff = off + PFOUR_COLOR_OFF_COLOR; 445 } else if ((u_int)off < START_ENABLE) { 446 /* 447 * in overlay plane 448 */ 449 poff = PFOUR_COLOR_OFF_OVERLAY + off; 450 } else if ((u_int)off < START_COLOR) { 451 /* 452 * in enable plane 453 */ 454 poff = (off - START_ENABLE) + PFOUR_COLOR_OFF_ENABLE; 455 } else if ((u_int)off < sc->sc_fb.fb_type.fb_size) { 456 /* 457 * in colour plane 458 */ 459 poff = (off - START_COLOR) + PFOUR_COLOR_OFF_COLOR; 460 } else if ((u_int)off < START_SPECIAL) { 461 /* 462 * hole 463 */ 464 poff = 0; /* XXX */ 465 } else if ((u_int)off == START_SPECIAL) { 466 /* 467 * colour map (Brooktree) 468 */ 469 poff = PFOUR_COLOR_OFF_CMAP; 470 } else if ((u_int)off == START_SPECIAL + PAGE_SIZE) { 471 /* 472 * p4 register 473 */ 474 poff = 0; 475 } else if ((u_int)off > (START_SPECIAL + (PAGE_SIZE * 2)) && 476 (u_int) off < (START_SPECIAL + (PAGE_SIZE * 2) + PROMSIZE)) { 477 /* 478 * rom 479 */ 480 poff = 0x8000 + (off - (START_SPECIAL + (PAGE_SIZE * 2))); 481 } else 482 return (-1); 483 484 return (bus_space_mmap(sc->sc_bustag, 485 sc->sc_paddr, poff, 486 prot, BUS_SPACE_MAP_LINEAR)); 487 } 488 489 #if defined(SUN4) 490 /* 491 * Undo the effect of an FBIOSVIDEO that turns the video off. 492 */ 493 static void 494 cgeightunblank(device_t dev) 495 { 496 497 cgeight_set_video(device_private(dev), 1); 498 } 499 500 static int 501 cgeight_get_video(struct cgeight_softc *sc) 502 { 503 504 return (fb_pfour_get_video(&sc->sc_fb)); 505 } 506 507 static void 508 cgeight_set_video(struct cgeight_softc *sc, int enable) 509 { 510 511 fb_pfour_set_video(&sc->sc_fb, enable); 512 } 513 514 /* 515 * Load a subset of the current (new) colormap into the Brooktree DAC. 516 */ 517 static void 518 cgeightloadcmap(struct cgeight_softc *sc, int start, int ncolors) 519 { 520 volatile struct bt_regs *bt; 521 u_int *ip; 522 int count; 523 524 ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ 525 count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; 526 bt = &sc->sc_fbc->fbc_dac; 527 bt->bt_addr = BT_D4M4(start); 528 while (--count >= 0) 529 bt->bt_cmap = *ip++; 530 } 531 #endif /* SUN4 */ 532